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  • Flexible nickel foam decorated with Pt/NiO nanoflakes with oxygen vacancies for enhanced catalytic formaldehyde oxidation at room temperature
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-21
    Shuying Huang, Xiaofeng Zhu, Bei Cheng, Jiaguo Yu, Chuanjia Jiang

    Catalytic formaldehyde (HCHO) oxidation at ambient temperature is an efficient technology for indoor air purification. Herein, flexible nickel (Ni) foam coated with Pt/NiO nanoflake catalysts were prepared through fast chemical bath deposition, which exhibited enhanced activity for HCHO removal at room temperature. In contrast, no HCHO oxidation activity was observed for control samples without loading platinum (Pt) or coating nickel(II) oxide (NiO) nanoflakes. By optimizing the deposition duration, almost 90% HCHO removal efficiency was achieved within 1 h over the sample with 1 h deposition time. The deposition of NiO nanoflakes over Ni foam not only forms hierarchical structure facilitating the reactions kinetically, but also provides sufficient oxygen vacancies promoting Pt deposition and consequent HCHO oxidation. The HCHO oxidation activity of the catalysts positively correlated with Pt dispersion and with the proportion of oxygen-deficient NiO, as determined by hydrogen temperature programmed reduction. Moreover, the mechanism of room-temperature HCHO catalytic oxidation over as-prepared catalysts was investigated by in-situ diffuse reflectance infrared Fourier transform spectra, which identified formate and dioxymethylene as the main reaction intermediate. Compared with powder-like catalysts, the Ni foam-supported Pt/NiO catalysts are of great flexibility and machinability, holding great promise for actual application.

    更新日期:2017-09-21
  • Synergistic effects of engineered nanoparticles and organics released from laser printers using nano-enabled toners: potential health implications from exposures to the emitted organic aerosol
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-30
    Marie-Cecile G. Chalbot, Sandra V. Pirela, Laura Schifman, Varun Kasaraneni, Vinka Oyanedel-Craver, Dhimiter Bello, Vincent Castranova, Yong Qian, Treye Thomas, Ilias G. Kavouras, Philip Demokritou
    更新日期:2017-09-21
  • A mussel-inspired hybrid copolymer adhered to chitosan-coated micro-sized carbon fiber aerogels for highly efficient nanoparticle scavenging
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-07
    Rui-Lin Liu, Shuai Mao, Yan Wang, Lu Wang, Yan-Hui Ge, Xin-Ya Xu, Qiang Fu
    更新日期:2017-09-20
  • Efficient and selective removal of radioactive iodine anions using engineered nanocomposite membranes
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-07
    Sajid Mushtaq, Seong-Jae Yun, Jung Eun Yang, Sun-Wook Jeong, Ha Eun Shim, Mi Hee Choi, Sang Hyun Park, Yong Jun Choi, Jongho Jeon
    更新日期:2017-09-15
  • Sediments inhibit adsorption of 17β-estradiol and 17α-ethinylestradiol to carbon nanotubes and graphene oxide
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-02
    Weiling Sun, Menglin Li, Wei Zhang, Jingmiao Wei, Ben Chen, Conghe Wang
    更新日期:2017-09-14
  • Modulating protein amyloid aggregation with nanomaterials
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-28
    Bo Wang, Emily H. Pilkington, Yunxiang Sun, Thomas P. Davis, Pu Chun Ke, Feng Ding
    更新日期:2017-09-14
  • Ultraviolet photo-oxidation of polyvinylpyrrolidone (PVP) coatings on gold nanoparticles
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-28
    Stacey M. Louie, Justin M. Gorham, Jiaojie Tan, Vincent A. Hackley
    更新日期:2017-09-14
  • Influence of multi-walled carbon nanotubes and fullerenes on the bioaccumulation and elimination kinetics of phenanthrene in geophagous earthworms (Metaphire guillelmi)
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-27
    Haiyun Zhang, Weixiao Chen, Xiaofang Shen, Meng Zhang, Yu Yang, Jason C. White, Shu Tao, Xilong Wang
    更新日期:2017-09-14
  • Methodology for quantifying engineered nanomaterial release from diverse product matrices under outdoor weathering conditions and implications for life cycle assessment
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-26
    Ronald S. Lankone, Katie E. Challis, Yuqiang Bi, David Hanigan, Robert B. Reed, Tatiana Zaikova, James E. Hutchison, Paul Westerhoff, James Ranville, Howard Fairbrother, Leanne M. Gilbertson
    更新日期:2017-09-14
  • Fabrication of a phosphorylated graphene oxide–chitosan composite for highly effective and selective capture of U(VI)
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-25
    Yawen Cai, Chunfang Wu, Zhiyong Liu, Linjuan Zhang, Lanhua Chen, Jianqiang Wang, Xiangke Wang, Shitong Yang, Shuao Wang
    更新日期:2017-09-14
  • Biodegradation of graphene oxide-polymer nanocomposite films in wastewater
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-20
    Jingjing Fan, Carlos David Grande, Debora F. Rodrigues
    更新日期:2017-09-14
  • Influence of nitrogen limitation on the bioaccumulation kinetics of hematite nanoparticles in the freshwater alga Euglena intermedia
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-19
    Bin Huang, Ai-Jun Miao, Lin Xiao, Liu-Yan Yang
    更新日期:2017-09-14
  • Layered silicate RUB-15 for efficient removal of UO22+ and heavy metal ions by ion-exchange
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-19
    Zhe Chen, Yu Liang, Dashuang Jia, Wanying Chen, Zhimin Cui, Xiangke Wang
    更新日期:2017-09-14
  • Enhanced biofilm penetration for microbial control by polyvalent phages conjugated with magnetic colloidal nanoparticle clusters (CNCs)
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-19
    Ling-Li Li, Pingfeng Yu, Xifan Wang, Sheng-Song Yu, Jacques Mathieu, Han-Qing Yu, Pedro J. J. Alvarez
    更新日期:2017-09-14
  • Use of PVP-coated magnetite nanoparticles to ameliorate oil toxicity to an estuarine meiobenthic copepod and stimulate the growth of oil-degrading bacteria
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-18
    Amjed Alabresm, Seyyedali Mirshahghassemi, G. Thomas Chandler, Alan W. Decho, Jamie Lead
    更新日期:2017-09-14
  • Effects of titanium oxide nanoparticles on tetracycline accumulation and toxicity in Oryza sativa (L.)
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-18
    Chuanxin Ma, Hong Liu, Guangcai Chen, Qing Zhao, Brian Eitzer, Zonghua Wang, Wenjun Cai, Lee A. Newman, Jason C. White, Om Parkash Dhankher, Baoshan Xing
    更新日期:2017-09-14
  • Mg-doped OMS-2 nanorods: a highly efficient catalyst for purification of volatile organic compounds with full solar spectrum irradiation
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-12
    Shiming Fang, Yuanzhi Li, Yi Yang, Jian Chen, Huihui Liu, Xiujian Zhao
    更新日期:2017-09-14
  • High-permeance metal-organic framework-based membrane adsorber for removal of dye molecules in aqueous phase
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-13
    Hsiang Ting, Heng-Yu Chi, Chon Hei Lam, Kuan-Ying Chan, Dun-Yen Kang

    This paper reports on a novel membrane adsorber comprising metal-organic frameworks (MOFs) for water treatment. Two types of MOF (ZIF-8 and ZIF-L) were grown within a porous α-alumina support to form a membrane for the adsorption of the dye molecule, Rose Bengal, in aqueous phase. The external surface of the ZIF-L was shown to possess a strong affinity for Rose Bengal. We also observed that small crystals (with large external surface area) are beneficial to adsorption. The surfactant CTAB was used in the synthesis of ZIF-L-based membrane adsorber in order to reduce the size of ZIF-L particles and increase the loading of ZIF-L within the membrane. The membrane adsorber with the highest concentration of CTAB achieved the highest dynamic adsorption capacity. ZIF-L-based membrane adsorbers exhibited water permeance (10^4 L/m^2/bar/h) far exceeding that of most existing membrane adsorbers.

    更新日期:2017-09-14
  • Investigations into titanium dioxide nanoparticle and pesticide interactions in aqueous environments
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-30
    Svetlana M. Ilina, Patrick Ollivier, Danielle Slomberg, Nicole Baran, Anne Pariat, Nicolas Devau, Nicole Sani-Kast, Martin Scheringer, Jérôme Labille
    更新日期:2017-09-13
  • Quantitative evaluation and in vivo visualization of mercury ion bioaccumulation in rotifers by novel aggregation-induced emission fluorogen nanoparticles
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-12
    Yusheng Jiang, Tao He, Yuncong Chen, Yinlan Ruan, Yabin Zhou, Ben Zhong Tang, Jianguang Qin, Youhong Tang

    In this study, the specifically-designed aggregation-induced emission fluorogen (AIEgen) with nanoparticle aggregates was used to quantitatively evaluate the bioaccumulation of Hg2+ and in vivo visualize Hg2+ kinetics within the rotifer Brachionus plicatilis for the first time. Quantitative results showed that a sharp drop in Hg2+ concentration occurred at the very beginning in the medium containing rotifers and Hg2+, showing a quick initial uptake of Hg2+ by rotifers and reaching a plateau concentration in the medium after 5 min. With an increase in rotifer density, the amount of bioaccumulation increased in the rotifer. However, the bioaccumulation efficiency of Hg2+ decreased from 5.28 µg/mg/h at a low rotifer density of 0.093 mg /ml to 2.61 µg/mg/h at a high rotifer density of 0.375 mg/mL. Moreover, the fluorescent images and spectra results illustrated that the ingestion of Hg2+ in the rotifer was via the mouth surrounded by the ciliary corona to the digestive tract, and Hg2+ could not permeate into the body integument through diffusion at the study period. Hg2+-induced fluorescence in rotifers dissipated in 6 h after staining possibly through defecation and excretion. This study indicates that inorganic mercury can be quickly ingested by a rotifer via feeding, but is unlikely deposited as methylated mercury in rotifer tissues.

    更新日期:2017-09-12
  • Applications of Surface-Enhanced Raman Spectroscopy on Nanoparticle Analysis in the Environment
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-12
    Huiyuan Guo, Lili He, Baoshan Xing

    The rise of nanotechnology has introduced a large number of nano-enabled consumer products into the market. Stakeholders either interested in or concerned about the applications of nanoparticles (NPs) have questions on their exposure pathways, behavior and fate in the environment. Currently, detection and analysis of NPs in complex environmental samples are difficult and challenging. This review summarizes the arising attempts on use of Surface-enhanced Raman spectroscopy (SERS) as a valuable tool for NP analysis. The critical factors influencing the feasibility of SERS for NP analysis are the material type, individual size, primary shape, surface chemistry and spatial arrangement of NPs. Current SERS methods for identification, characterization and potential quantification of NPs are summarized and compared, with key limitations and issues recognized. Further, SERS applications in investigating the environmental behavior and fate of NPs are discussed. Probing and monitoring NPs using SERS yields important insights into the roles that NPs play in the environment. By studying the potential of SERS to detect NPs and track their environmental behavior and fate, environmental scientists are able to achieve an in-depth understanding of the benefits and risks of NPs. Also knowledge from SERS can guide the nanotechnology research community to develop and apply NPs in a safe and effective manner. With an outlook on the key challenges and potential solutions in the end, this review is expected to appeal a broad audience in the field of nanotechnology, interfacial chemistry, analytical chemistry, soil science, environmental science, food science, and nanotoxicology.

    更新日期:2017-09-12
  • Metal-Support Interactions in Catalysts for Environmental Remediation
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-12
    Kakeru Fujiwara, Kikuo Okuyama, Sotiris E Pratsinis

    Catalytic decomposition of organic air pollutants is attractive in environmental remediation but challenging because such reactions must take place at ambient temperature. To achieve sufficient catalytic activity at these conditions, the size, morphology and electric state of catalysts are critical. In particular, the interaction between noble metal and their ceramic supports is crucial for these catalysts. We herein elucidate the significance of strong metal-support interactions (SMSIs) and strong oxide-support interactions (SOSIs) in such catalysts. The SMSIs lead to embedded metal nanoparticles into ceramic supports hindering metal particle growth. For example, SMSIs in Pt-TiO2 formed by NaBH4 reduction at room temperature allows to stabilize Pt clusters of 1-2 nm in diameter. On the other hand, SMSIs in Ag-TiO2 composites form crystalline TiOx (x < 2) that is a highly active photocatalyst under the full range of visible light (400–800 nm). Furthermore, such embedded structures could enhance visible light absorption by plasmonic materials. The SOSIs take place between metals and supports through oxygen ligands forming their hetero-bimetallic structure (e.g. Cu-O-Ti). This enables visible-light absorption and facilitates the transfer of photo-excited electrons to the co-catalysts (e.g. TiO2 to Cu) resulting in superior visible-light activity with quantum yield over 50%. Also, such interactions allow to stabilize small metal clusters and even single atoms on the supports to significantly facilitate the catalytic oxidation of pollutants at ambient temperature. For example, single Pd atoms on TiO2 increase it photocatalytic NOx removal by 9 times while only doubling its cost.

    更新日期:2017-09-12
  • Enhanced removal of roxarsone by Fe3O4@3D graphene nanocomposite: synergistic adsorption and mechanism
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-08
    Chen Tian, Jian Zhao, Jing Zhang, Shengqi Chu, Zhi Dang, Zhang Lin, Baoshan Xing

    Roxarsone (ROX) is an emerging arsenic pollutant due to its potential degradation into highly toxic inorganic arsenic species in the environment. Adsorbents which can capture ROX with both high capacity and affinity are urgently needed. Herein, a nanocomposite of nano-Fe3O4 and three-dimensional graphene (Fe3O4@RGO) was designed, aiming to simultaneously attract arsenate and benzene groups in ROX. Characterization of the nanocomposite revealed that Fe3O4 nanoparticles (20-50 nm) with exposing (400) planes were highly dispersed on graphene support. Adsorption experiments showed that Fe3O4@RGO had higher adsorption capacity, affinity, and adsorption rate towards ROX than pristine materials, and efficiently removed ROX from both simulated natural and waste waters. The adsorption mechanism was confirmed as a synergetic interaction of As-Fe coordination, hydrogen bonding and π-π interaction. X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS) results suggested the As-Fe complexes and hydrogen bonds between Fe3O4@RGO and ROX were stronger than those in pristine nano-Fe3O4, due to the more surface hydroxyls and shorter As-Fe atom distance in Fe3O4@RGO. The π-π interaction between ROX and grapheme part in Fe3O4@RGO was also enhanced. This study provided a novel idea for designing materials to remove the pollutants with both inorganic and organic moieties, such as phenylarsonic acid compounds, from water.

    更新日期:2017-09-08
  • Highly efficient visible-light-induced photoactivity of Z‑scheme Ag2CO3/Ag/WO3 photocatalysts for organic pollutant degradation
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-08
    Xingzhong Yuan, Longbo Jiang, Xiaohong Chen, Lijian Leng, Wang Hou, Zhibin Wu, Ting Xiong, Jie Liang, Guangming Zeng

    A novel and efficient Z-scheme Ag2CO3/Ag/WO3 with excellent visible-light-driven photocatalytic performance was fabricated using a facile deposition and photochemical reduction process. Surface, morphological, and structural properties of the resulting materials were characterized using N2 sorption–desorption and Brunauer–Emmett–Teller (BET) surface area, scanning electron microscopy, transmission electron microscopy, X–ray diffraction, X–ray photoelectron spectroscopy, and UV−vis and photoluminescence spectroscopy. The photocatalytic performance of Ag2CO3/Ag/WO3 composites were evaluated by the degradation of rhodamine B (RhB), methyl orange (MO), ciprofloxacin (CIP), and tetracycline hydrochloride (TC) under visible light irradiation. The results demonstrate that the novel Z-scheme Ag2CO3/Ag/WO3 compositesexhibit higher photocatalytic activity than pure Ag2CO3 rods and WO3 nanoparticles. The enhanced photocatalytic activity of Ag2CO3/Ag/WO3 can be ascribed to extended absorption in the visible light region caused by surface plasmon resonance (SPR) effect, effective separation of photogenerated charges, formation of Z-scheme system. In addition, the photocatalyst exhibits high stability and reusability. This work could offer a new insight into the design and fabrication of advanced materials with Z-scheme structures for photocatalytic applications for organic pollutants removal from wastewater.

    更新日期:2017-09-08
  • Efficient and selective removal of radioactive iodine anions using engineered nanocomposite membranes
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-07
    Sajid Mushtaq, Seong-Jae Yun, Jung Eun Yang, Sun-Wook Jeong, Ha Eun Shim, Mi Hee Choi, Sang Hyun Park, Yong Jun Choi, Jongho Jeon

    The efficient treatment of radioactive wastes arising from nuclear accidents and overuse of radioisotopes has become an important issue and much efforts have been made to protect environment from such toxic radioactive materials. Among them, radioactive iodine in water is regarded as one of the most palpable threat to human as it is generated by post-use of medical and industrial applications. Although a few adsorbents and purification processes have been reported, developing a better desalination method which is able to provide high removal efficiency, ion-selectivity, and reusability is still demanded. Herein, we report the hybrid composite membrane, composed of gold nanoparticles and cellulose acetate membranes, which has potential to be used for efficient desalination of radioactive iodine. A single filtration process using this membrane provided high removal efficiency with more than two orders of magnitude within a minute and excellent ion-selectivity in iodide anion removal. Moreover, the same operation can be applied several times without significant decrease of its performance. Therefore, it is anticipated that our work will be a new avenue on desalination process of radioactive iodine in various aqueous media.

    更新日期:2017-09-07
  • Mussel-inspired hybrid copolymer adhered to chitosan-coated micro-sized carbon fiber aerogels for high-efficient nanoparticles scavenger
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-07
    Ruilin Liu, Shuai Mao, Yan Wang, Lu Wang, Yanhui Ge, Xinya Xu, Qiang Fu

    With the extensive use of nanomaterials in commercial products will lead to environmental contamination which may cause serious health issue in the future. Till now, limited scavengers are available for the capture of such emerging nanopollutants from water. The aim of this work was to synthesize hybrid ternary co-polymer membranes coated micrometer-sized carbon fiber aerogels (MCFAs) for the removal of emerging nanopollutants from water and to investigate the mechanisms involved. The MCFAs was fabricated by direct pyrolysis of cotton at an inert atmosphere. Post-modification with chitosan (CS) and dopamine-polyethylenimine (PEI) complex generated porous texture and amine-coated MCFAs, followed by protonation using diluted acid solution. Surface functional groups and morphology of the ternary CS and dopamine-PEI co-coated MCFAs were systematically characterized. The as-obtained hybrid composite was successfully used for the removal of citrate-capped gold and silver nanoparticles from water. Equilibrium data were well fitted to the Langmuir isotherm model with the maximal adsorption capacities of 31.2 mg g-1 (Au NPs) and 41.8 mg g-1 (Ag NPs) at ambient temperature. The highest adsorption capacities reached 30.2 mg g-1 (Au NPs) and 34.9 mg g-1 (Ag NPs) at the equilibrium concentrations, which were very close to the maximum monolayer adsorption capacities. In addition, the adsorption of both nanoparticles on as-prepared composite followed pseudo-second-order kinetics model. Thereupon, this work may pave the way for enhancing the property of MCFAs during removal of nanopollutants from medical and/or industrial wastewaters.

    更新日期:2017-09-07
  • Structural and physical–chemical behavior of a CeO2 nanoparticle based diesel additive during combustion and environmental release
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-06
    M. Auffan, M. Tella, W. Liu, A. Pariat, M. Cabié, D. Borschneck, B. Angeletti, G. Landrot, C. Mouneyrac, L. Giambérini, J. Rose
    更新日期:2017-09-06
  • The efficacy and environmental implications of engineered TiO2 nanoparticles in a commercial floor coating
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-30
    Yuqiang Bi, Tatiana Zaikova, Jared Schoepf, Pierre Herckes, James E. Hutchison, Paul Westerhoff
    更新日期:2017-09-05
  • Low content nano-polyrhodanine modified polysulfone membranes with superior properties and their performance for wastewater treatment
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-17
    Sadegh Aghapour Aktij, Ahmad Rahimpour, Alberto Figoli
    更新日期:2017-09-05
  • Comprehensive evaluation of the cytotoxicity of CdSe/ZnS quantum dots in Phanerochaete chrysosporium by cellular uptake and oxidative stress
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-09-04
    Liang Hu, Jia Wan, Guangming Zeng, Anwei Chen, Guiqiu Chen, Zhenzhen Huang, Kai He, Min Cheng, Chengyun Zhou, Weiping Xiong, Cui Lai, Piao Xu
    更新日期:2017-09-04
  • Interaction of carbon nanotubes with microbial enzymes: conformational transitions and potential toxicity
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-14
    Ming Chen, Guangming Zeng, Piao Xu, Min Yan, Weiping Xiong, Shuang Zhou
    更新日期:2017-09-04
  • Mass spectrometry-based metabolomics to assess uptake of silver nanoparticles by Arabidopsis thaliana
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-31
    Nita G. Chavez Soria, Angelina Montes, Mary A. Bisson, G. Ekin Atilla-Gokcumen, Diana S. Aga
    更新日期:2017-08-31
  • Ecotoxicological assessment of nanoparticle-containing acrylic copolymer dispersions in fairy shrimp and zebrafish embryos
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-22
    Tamara S. Galloway, Yuktee Dogra, Natalie Garrett, Darren Rowe, Charles R. Tyler, Julian Moger, Eva Lammer, Robert Landsiedel, Ursula G. Sauer, Gertrud Scherer, Wendel Wohlleben, Karin Wiench
    更新日期:2017-08-31
  • Understanding the pH-dependent adsorption of ionizable compounds on graphene oxide using molecular dynamics simulations
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-15
    Huan Tang, Ying Zhao, Xiaonan Yang, Dongmei Liu, Sujie Shan, Fuyi Cui, Baoshan Xing
    更新日期:2017-08-31
  • Investigations into titanium dioxide nanoparticle and pesticide interactions in aqueous environments
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-30
    Svetlana Ilina, patrick ollivier, Danielle Slomberg, Nicole Baran, Anne Pariat, Nicolas Devau, Nicole Sani Kast, Martin Scheringer, Jerome Labille

    The influence of three pesticides (glyphosate, aminomethylphosphonic acid (AMPA) and 2,4-dichlorophenoxyacetic acid (2,4-D)) on the colloidal fate of TiO2 nanoparticles (NPs; anatase and rutile) has been investigated in aqueous conditions of variable chemical composition (Na+ or Ca2+), ionic strength (IS, 10-4–10-1 M), and pH (5 or 8). Sorption and degradation of these pesticides in the presence of the NPs was evaluated. In absence of pesticide, increasing IS, the presence of the divalent cation Ca2+, and a pH close to the NP isoelectric point, favored NP homoaggregation as expected. However, at low IS (≤10-2 M in NaCl; ≤10-3 M in CaCl2), in the presence of a few µg/L of glyphosate and rutile in the mg/L range, NP homoaggregation was prevented, despite a pH=5 close to the NP isoelectric point (4.0–4.2). The phosphonate group of the pesticide drove glyphosate adsorption onto the NP, while the carboxylic group was responsible for electrostatic stabilization of the NP. The stabilizing effect of glyphosate on NP aggregation however appears temporary. Furthermore, TiO2 NPs also adsorbed AMPA and promoted degradation of glyphosate to AMPA. These results highlight new evidence of NP-pesticide interactions and the differences in their fate and potential co-migration behavior in aquatic environments.

    更新日期:2017-08-31
  • Synergistic effects of engineered nanoparticles and organics released from laser printers using nano-enabled toners: From exposures to the emitted organic aerosol
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-30
    Marie-Cecile Chalbot, Sandra V Pirela, Laura Schifman, Varun Kasaraneni, Vinka Oyanedel Craver, Dhimiter Bello, Vincent Castranova, Yong Qian, Treye Thomas, Ilias Kavouras, Philip Demokritou

    Recent studies have shown that engineered nanoparticles (ENPs) are incorporated into toner powder used in printing equipment and released during their use. Thus, understanding the functional and structural composition and potential synergistic effects of this complex aerosol and released gaseous co-pollutants is critical in assessing their potential toxicological implications and risks. In this study, toner powder and PEPs were thoroughly examined for functional and molecular composition of the organic fraction and the concentration profile of 16 Environmental Protection Agency (EPA)-priority polycyclic aromatic hydrocarbons (PAH) using state of the art analytical methods. Results show significant differences in abundance of non-exchangeable organic hydrogen of toner powder and PEPs, with a stronger aromatic spectral signature in PEPs. Changes in structural composition of PEPs are indicative of radical additions and free-radical polymerization favored by catalytic reactions, resulting in formation of functionalized organic species. Particularly, accumulation of aromatic carbons with strong styrene-like molecular signatures on PEPs is associated with formation of semi-volatile heavier aromatic species (i.e., PAHs). Further, the transformation of low molecular weight PAHs in the toner powder to high molecular weight PAHs in PEPs was documented and quantified. This may be a result of synergistic effects from catalytic metal/metal oxide ENPs incorporated into the toner and the presence/release of semi-volatile organic species (SVOCs). The presence of known carcinogenic PAHs on PEPs raises public health concerns and warrants further toxicological assessment.

    更新日期:2017-08-31
  • The Efficacy and Environmental Implications of Engineered TiO2 Nanoparticles in a Commercial Floor Coating
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-30
    Yuqiang Bi, Tatiana Zaikova, Jared Schoepf, Pierre Herckes, James Hutchison, Paul Westerhoff

    Engineered nanomaterials (ENM) have diverse applications in consumer products, but few studies weigh the improved product performance resulting from the inclusion of an ENM against the unintended consequences of released ENM. We developed and applied a framework to test a commercial floor coating that contains TiO2 nanoparticles in a silicate/siliconate matrix for both efficacy and exposure risk. Extracted TiO2 nanoparticles from the product were first characterized for particle size, morphology, mass concentration, and surface chemical composition prior to floor tile application. Porcelain tiles were coated with three TiO2 concentrations to understand the effect of TiO2 content on coating performance with respect to antimicrobial properties, abrasion resistance, and hydrophobicity. Coating porcelain tiles with the commercial product did not significantly enhance antimicrobial activity or scratch resistance compared to controls without TiO2 nanoparticles. Particles released during accelerated abrasion were collected and analyzed by scanning electron microscopy (SEM) to inform exposure studies. During the abrasion test that simulated product use phase, TiO2 nanoparticles clusters were effectively removed from tile surfaces and embedded in a micron-sized silicate matrix. Reactive oxygen species (ROS) generated in water by photocatalytic reactions using TiO2 from the coating was an order of magnitude lower than by a TiO2 nanoparticle standard. While the overall exposure risk to TiO2 nanoparticles released from floor coatings is low, we did not observe increased efficacy from adding TiO2 to the coating formulation. Product developers and policy makers may use the framework developed in this study to systematically assess the efficacy and product safety across a product’s life cycle.

    更新日期:2017-08-30
  • Analytical methods to assess the oxidative potential of nanoparticles: a review
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-30
    Bryan Hellack, Carmen Nickel, Catrin Albrecht, Thomas A. J. Kuhlbusch, Sonja Boland, Armelle Baeza-Squiban, Wendel Wohlleben, Roel P. F. Schins
    更新日期:2017-08-30
  • Carbon-nanotube sponges enabling highly efficient and reliable cell inactivation by low-voltage electroporation
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-16
    Zheng-Yang Huo, Yufeng Luo, Xing Xie, Chao Feng, Kaili Jiang, Jiaping Wang, Hong-Ying Hu
    更新日期:2017-08-29
  • European country-specific probabilistic assessment of nanomaterial flows towards landfilling, incineration and recycling
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-11
    Véronique Adam, Bernd Nowack
    更新日期:2017-08-25
  • Characterization of photocatalytic paints: a relationship between the photocatalytic properties – release of nanoparticles and volatile organic compounds
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-02
    D. Truffier-Boutry, B. Fiorentino, V. Bartolomei, R. Soulas, O. Sicardy, A. Benayad, J.-F. Damlencourt, B. Pépin-Donat, C. Lombard, A. Gandolfo, H. Wortham, G. Brochard, A. Audemard, L. Porcar, G. Gebel, S. Gligorovski
    更新日期:2017-08-25
  • Ecotoxicological assessment of nanoparticle-containing acrylic copolymer dispersions in fairy shrimp and zebrafish embryos
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-22
    Tamara Galloway , Yuktee Dogra, Natalie Laura Garrett, Darren Rowe, Charles R Tyler, Julian Moger, Eva Lammer, Robert Landsiedel, Ursula G. Sauer, Gertrud Scherer, Wendel Wohlleben, Karin Wiench

    Nanoparticle-containing polymer dispersions are widely used, but little is known of their environmental effects. We studied the bioavailability, uptake, tissue localisation and effects of nanoparticle-containing acrylic copolymer (ACP) dispersions (mean nanoparticle sizes: 80 nm and 110 nm) in aquatic invertebrates (Thamnocephalus platyurus; fairy shrimp) and Danio rerio zebrafish embryos after aquatic exposures. Dietary exposure tests were enabled using Casper zebrafish that lack skin pigmentation allowing for bio-imaging of uptake and internal distribution. Aqueous exposures of 1000 and 2500 mg/L 80 nm-ACP or 110 nm-ACP showed no acute toxicity in fairy shrimp or zebrafish, constituting a non-toxic classification according to the United Nations Globally Harmonised System of Classification and Labelling of Chemicals threshold (100 mg/L). Similarly, dietary exposures resulted in no ecotoxicological effects. In Casper zebrafish fed with 80 nm-ACP-spiked food, hyperspectral signals derived using Coherent Raman Scattering (CRS) indicated that test material was present in the intestine, and possibly in the liver, but not in other organs. CRS imaging indicated that the chemical composition of the yolk sac of an 80 nm-ACP exposed zebrafish (aquatic exposure) was altered, attributed to a change in lipid metabolism, although we could not confirm with certainty that the test material was physically present in the yolk sac. These results illustrate how CRS microscopy can be used to investigate the bioaccumulation of organic nanomaterials, provided that they induce hyperspectral profiles distinct from the biological samples. In conclusion, both 80nm- and 110nm-ACP dispersions are internalised through dietary exposure, but are not associated with significant toxic effects.

    更新日期:2017-08-23
  • Low content nano-polyrhodanine modified polysulfone membranes with superior properties and performance for wastewater treatment
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-17
    Sadegh Aghapour Aktij , Ahmad Rahimpour, Alberto Figoli

    In this study, PSf ultrafiltration membranes were modified by low content of polyrhodanine (PRh) nanoparticles to improve the membrane performance for wastewater treatment. Ternary phase diagram evaluation showed that the binodal boundary moved to the solvent-polymer axis by addition of the 0.05 wt% PRh nanoparticles and hence the speed of phase separation increased and consequently the membrane porosity improved. Contact angle results confirmed the hydrophilicity enhancement of the membrane surface by addition of PRh nanoparticles to the polymer solution. Furthermore, by addition of the 0.05 wt% PRh nanoparticles to the PSf casting solution, the water and industrial wastewater flux increased from 83 and 70 LMH to 259 and 135 LMH respectively. Additionally, the COD and natural organic matter removal increased from 56.8% and 81.8% to 66.3% and 89.5% respectively. Although increasing the nanoparticle content up to 0.08 wt% had no considerable effect on the membrane rejection, the water and industrial wastewater flux decreased to 80 LMH and 64 LMH. Moreover, modified membranes showed lower irreversible fouling and higher water flux recovery indicating better antifouling properties for them. In addition, the membrane containing low contents of PRh nanoparticles demonstrated considerable antibacterial activity.

    更新日期:2017-08-17
  • Carbon-Nanotube Sponges Enabling High-Efficiency and Reliable Cell Inactivation by Low-Voltage Electroporation
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-16
    Zheng-Yang Huo, Yufeng Luo, Xing Xie, Chao Feng, Kaili Jiang, Jiaping Wang, Hong-Ying Hu

    The recent bloom of nanomaterials has kindled the strong demand of a new cell inactivation technology that can replace the conventional cell inactivation process with high throughput, free chemicals usage, and outstanding efficacy to all pathogens to overcome the critically global issue -- microbial infection. Here, we construct a macroscopic carbon nanotube (CNT) sponge through a simple self-assembly method. Based on the technology of 1D nanostructure assisted electroporation, an electroporation disinfection cell (EDC) equipped with CNT sponge has achieved superior cell inactivation performance (<0.00001% microbe survival rate) within a contact time of 5 s at extremely low applied voltage (2 V), trace energy consumption (20 J L−1), and outstanding durability (>60 min). The CNT sponge EDC can be easily powered by batteries or solar cells and shows the best energy consumption performance among all the cell inactivation technologies. Cell inactivation using CNT sponge EDC has great potential for practical applications.

    更新日期:2017-08-16
  • Understanding the pH-Dependent Adsorption of Ionizable Compounds on Graphene Oxide Using Molecular Dynamics Simulations
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-15
    Huan Tang, Ying Zhao, Xiaonan Yang, Dongmei Liu, Sujie Shan, fuyi cui, Baoshan Xing

    Bisphenol A was used as representative ionizable organic compounds (IOCs) to investigate their adsorption on graphene oxide (GO). To explore the pH-dependent adsorption of IOCs on GO, analysis of electrostatic interaction energy, hydrophobicity, and π-electron densities of benzene rings under different pH conditions was carried out employing molecular dynamics (MD) simulations and density functional theory (DFT) calculations. Six configurations of H-bond were witnessed during the adsorption process: (1) intramolecular H-bond between functional groups of GO; (2) GO…water H-bond; (3) GO…water…GO H-bond; (4) IOC…GO H-bond; (5) IOC…water…GO H-bond; and (6) IOC…water H-bond. MD results indicated more H-bonds appeared between GO (or IOC) and water than that between IOC and GO, indicating the water-mediated H-bond acted as a steering force in the adsorption process. Upon the adsorption, configurations of IOCs and GO were changed, and the hydrophilicity was decreased, which may in turn affect their fate and toxicity in the environment. The change of π-electron density of several common IOCs were provided, which may help to understand the pH-dependent behaviour of IOCs in future studies.

    更新日期:2017-08-15
  • Interaction of carbon nanotubes with microbial enzymes: conformational transitions and potential toxicity
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-14
    Ming Chen, Guangming Zeng, Piao Xu, Ming Yan, Weiping Xiong, Shuang Zhou

    Wide industrial, environmental and biomedical applications of carbon nanotubes (CNTs) are bringing them to enter the environment. Their toxicity to microorganisms has been experimentally reported, but underlying molecular mechanism is still unclear. Here, we investigated conformational transitions in widely distributed microbial enzymes in the presence and absence of single-walled carbon nanotubes (SWCNTs) by molecular dynamics (MD) simulations. Our study identifies a new mechanism that SWCNTs produce possible toxicity to microbes by inducing significant changes in enzymatic conformations. The protein-protein interactions undergo significant transitions with two monomers either towards or away from each other upon the appearance of SWCNTs. The significant conformational changes in microbial enzymes may inactivate the microbial enzymes and disturb the microbial metabolism.

    更新日期:2017-08-15
  • European country-specific probabilistic assessment of ENM flows towards landfilling, incineration and recycling
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-11
    Véronique Adam, Bernd Nowack

    Improving the risk assessment of engineered nanomaterials (ENMs) requires that uncertainties in their potential releases during their complete life cycle are quantified and, as far as possible, reduced. To date, most research has focused on releases of ENM during their use and from wastewater treatment plants. Few studies have considered releases during solid waste treatment, despite the high potential for releases during these processes. This work presents an assessment of ENM flows to waste treatment processes for each European country (EU28, Norway and Switzerland). Probabilistic material flow analysis was used to model the flows of ENMs from production, manufacturing and use to waste management processes (landfilling, incineration and recycling). Modelling was based on information on the occurrence of ENMs in product applications and on the life cycles of these nanoproducts, focusing on the flows in solid waste. Data were collected to calculate the proportions of ENM-containing waste products that enter landfills, incineration and recycling plants, considering the uncertainties associated with each data source. Results show that solid wastes containing nano-Ag, -TiO2 and –ZnO mostly flow to sorting and recycling plants, while solid waste containing carbon nanotubes is most often directly disposed. Due to low data availability, many uncertainties remain in the model and its output. Most reliable results were obtained for Austria and Switzerland. These results are useful to highlight hotspots of ENM releases during waste management. However, knowledge about ENM behaviour in waste treatment processes needs to be implemented in the model to obtain final results regarding ENM flows to the environment and possibly back to reprocessing.

    更新日期:2017-08-12
  • Methodology for quantifying engineered nanomaterial release from diverse product matrices under outdoor weathering conditions and implications for life cycle assessment
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-26
    Ronald S. Lankone, Katie E. Challis, Yuqiang Bi, David Hanigan, Robert B. Reed, Tatiana Zaikova, James E. Hutchison, Paul Westerhoff, James Ranville, Howard Fairbrother, Leanne M. Gilbertson
    更新日期:2017-08-11
  • Sediments inhibit adsorption of 17β-estradiol and 17α-ethinylestradiol to carbon nanotubes and graphene oxide
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-02
    Weiling Sun, Menglin Li, Wei Zhang, Jingmiao Wei, Ben Chen, Conghe Wang
    更新日期:2017-08-10
  • Correction: Activation of antioxidant and detoxification gene expression in cucumber plants exposed to a Cu(OH)2 nanopesticide
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-08-01
    Lijuan Zhao, Qirui Hu, Yuxiong Huang, Aaron N. Fulton, Cameron Hannah-Bick, Adeyemi S. Adeleye, Arturo A. Keller

    Correction for ‘Activation of antioxidant and detoxification gene expression in cucumber plants exposed to a Cu(OH)2 nanopesticide’ by Lijuan Zhao et al., Environ. Sci.: Nano, 2017, DOI: 10.1039/c7en00358g.

    更新日期:2017-08-10
  • Influence of multi-walled carbon nanotubes and fullerenes on the bioaccumulation and elimination kinetics of phenanthrene in geophagous earthworms (Metaphire guillelmi)
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-27
    Haiyun Zhang, Weixiao Chen, Xiaofang Shen, Meng Zhang, Yu Yang, Jason C. White, Shu Tao, Xilong Wang
    更新日期:2017-08-10
  • Light-driven micro- and nanomotors for environmental remediation
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-19
    M. Safdar, J. Simmchen, J. Jänis
    更新日期:2017-08-10
  • Environmental impact and potential health risks of 2D nanomaterials
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-19
    Michaela Fojtů, Wei Zhe Teo, Martin Pumera
    更新日期:2017-08-10
  • 更新日期:2017-08-10
  • Modeling human health characterization factors for indoor nanomaterial emissions in life cycle assessment: a case-study of titanium dioxide
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-07
    Michael P. Tsang, Dingsheng Li, Kendra L. Garner, Arturo A. Keller, Sangwon Suh, Guido W. Sonnemann
    更新日期:2017-08-10
  • Sulfidation kinetics of copper oxide nanoparticles
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-07-06
    Alexander Gogos, Basilius Thalmann, Andreas Voegelin, Ralf Kaegi
    更新日期:2017-08-10
  • Using multi criteria decision analysis to evaluate nanotechnology: nAg enabled textiles as a case study
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-06-28
    Andrea L. Hicks
    更新日期:2017-08-10
  • Activation of antioxidant and detoxification gene expression in cucumber plants exposed to a Cu(OH)2 nanopesticide
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-06-28
    Lijuan Zhao, Qirui Hu, Yuxiong Huang, Aaron N. Fulton, Cameron Hannah-Bick, Adeyemi S. Adeleye, Arturo A. Keller
    更新日期:2017-08-10
  • Residual weakly bound ligands influence biological compatibility of mixed ligand shell, thiol-stabilized gold nanoparticles
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-06-28
    Lisa Truong, Tatiana Zaikova, Nicole M. Schaeublin, Ki-Tae Kim, Saber M. Hussain, James E. Hutchison, Robert L. Tanguay
    更新日期:2017-08-10
  • Efficiently reducing the plant growth inhibition of CuO NPs using rice husk-derived biochar: experimental demonstration and mechanism investigation
    Environ. Sci.: Nano (IF 6.047) Pub Date : 2017-06-26
    Xiao-Feng Sima, Xian-Cheng Shen, Tao Fang, Han-Qing Yu, Hong Jiang
    更新日期:2017-08-10
Some contents have been Reproduced with permission of the American Chemical Society.
Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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