The nitrogen removal, microbial communities and enzymatic activities of sequencing batch reactors (SBRs) had been compared under long-term exposure of different hydroxyl-functionalized multi-walled carbon nanotubes (MWCNTs-OH) concentrations. Compared with 0 mg/L MWCNTs-OH, the chemical oxygen demand (COD) and nitrogen removals had no obvious change at 10 and 30 mg/L MWCNTs-OH during the whole operation

A significant amount of fugitive methane emission is generated from Municipal Solid Waste which is quantifiable amount in the overall methane emission. Relatively several models are proposed to quantify the amount of emission in the landfill. These models are based on two methods 1. Using analytical emission 2. Measurements. In this paper, the estimation of source positions and the emissions rates

The tannic acid/iron modified cotton yarn (TA/[email protected]) as inspired by plant polyphenol was prepared as a stable and highly efficient material in oil/water separation with a simple and environmentally friendly preparation method. Owing to the rough structures of the surface, TA/[email protected] showed super hydrophobicity with a water contact angle of greater than 150º by using water droplets

The effect of cow dung biochar on water hyacinth anaerobic digestion of with control setup (without biochar (T0) was investigated using a batch scale setup (at 35 °C). Biochar was applied in three doses (v/v) 0.5% (T0.5), 1% (T1), and 1.5% (T1.5) in anaerobic digestion setups and daily and cumulative biogas formation was recorded in all setups. Results revealed that biochar addition reduced the lag

Membrane distillation is a potential technology to recover more water from the RO brine concentrate for the purpose of high water recovery and zero liquid discharge. However, since calcium phosphate scaling has been widely reported in RO applications, it could also hinder high feed water recovery in the reclamation of wastewater by membrane distillation. In this study, the calcium phosphate saturated

The sorption of selected PAHs onto sediment components and graphene wool were studied. Different natural organic matter (NOM)- mineral-deficient (MDF), mineral-rich (MRF), and black carbon (BCF) fractions were recovered from natural sediment (NAS) using sequential separation methods. Detailed characterization of sediment components using BET, ICP-OES, SEM-EDS, XRD, and FTIR were carried out and significant

Environmental perfluoroalkyl substance (PFAS) concentrations have increased in the last decades, although their behaviour in the environment and potential deleterious effects are still unclear. In this context, the present study aimed to assess potential associations among these compounds in three fish species from differentially contaminated areas in southeastern Brazil, and morphometric indices used

The existing prediction model of eco-environmental water demand has the problem of large prediction error. In order to solve the above problems, the prediction model of eco-environmental water demand is constructed based on big data analysis. In order to reduce the prediction error of the ecological environment water demand prediction model, the framework of the ecological environment water demand

The environment impact of de-oiling and re-activation process of spent clay from oil industry was evaluated. The process includes many technical steps; de-oiling the entrained spent clay using solvent extraction techniques; solvent recovery process; re-activation process wherein the oil-free spent clay is treated with acid; and thermal polishing step at high temperature to increase the activity. Many

The role of biochar has been identified in soil organic carbon (SOC) mineralization, but the role of dissolved organic carbon (DOC) derived from biochar water extract (BE) is not well recognized. Therefore, rotary tillage (RT) and no-tillage (NT) with two moisturizers treatments; BE and distilled water (WA) were used to study the influence of DOC (through BE) on SOC mineralization and C fractions.

This paper reviews how upstream oil and gas organizations can rapidly dissect an expansive volume of data by taking steps to amalgamate all the data by combining the operational data and drilling rig sensor data to real-time windows using advanced analytics to mine the data for formation evaluation in the reservoir. Examination and impending the data to complex models progressively are carried out

Anaerobic-Anoxic-Oxic (AAO) process is widely used in municipal wastewater treatment plants because of its simple structure, rich experience in engineering design, easy operation control and simultaneous nitrogen and phosphorus removal. The energy consumed in the aeration process occupies more than 50% of the total energy consumption of the sewage treatment plant, and reducing aeration is one of the

Biochar is an industrial product made from organic wastes thought pyrolysis process and its application to soil-plant systems is known to result several benefits. Care should be however needed to select the appropriate doses, as a function of soils and environmental conditions. The aim of the study was to examine the effect of increasing (0.5-, 1-, 2.5-, 5- and 10 m m%) biochar doses on some agrochemical

Cement–based stabilization/solidification (S/S) is an effective, yet economic remediation technology to immobilize heavy metals in contaminated soils. In the present study, by using cement quicklime to solidify and stabilize the hexavalent chromium contaminated soil pretreated with FeSO4 ⋅ 7H2O, the unconfined compressive strength, toxic leaching, nuclear magnetic resonance tests were carried out on

At present, more and more urban sewage treatment plants are put into construction and operation in China. While improving the quality of the water environment, the urban sewage plant has brought new problems to its surrounding environment, the most typical of which is the problem of odor pollution. In this study, the urban sewage treatment plant is taken as the object to study the discharge rule of

Enhancing rapid remediation strategies is paramount for recovery after a large-scale nuclear contamination event in an urban environment. Some current strategies recommend use of readily available equipment, materials, and facilities to expedite recovery. For example, applying pressurized water to contaminated surfaces may effectively remove radioactive contamination. In this study, a commercial power

The present work aims to prepare magnesium aluminate nanoparticles (MgAl2O4 NPs) using aluminum isopropoxide and magnesium ethoxide by hydrolysis reaction and to investigate them as new adsorbent materials for the extraction and clean-up of dimethomorph pesticide from tap water. The MgAl2O4 NPs were characterized by X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field

The traditional method of dynamic calculation of blasting vibration response of buildings has low accuracy. For this reason, a dynamic calculation method of building blasting vibration response based on differential equation is designed. The information contained in the original time domain is converted into the frequency domain by Fourier transform, and then the intensity index of blasting vibration

To prevent eutrophication and remove phosphorus, circulating fluidized bed combustion (CFBC) ash was utilized to elute Ca2＋ and OH− for hydroxyapatite (HAP) crystallization. CFBC ash was compared with the gypsum byproduct of a domestic waste incineration plant and pure CaO reagent. CFBC ash proved to be a suitable raw material to supply Ca2＋ and OH− for HAP crystallization. CFBC ash was reprocessed

The Internet of Things (IoT) has a rapid growth in the development of smart and green environments. The IoT-based physical objects are interconnected with sensors, actuators, and data centers to gather, process and store the environmental data. The collected data is further utilized for post analysis and smarter decisions by the Base Station (BS). However, the limited resources of IoT-based sensors

A priority target control list, which included hydrogen sulfide, ethyl mercaptan, methyl sulfide, and dimethyl disulfide, was confirmed in terms of the threshold dilution multiple (TDM). The results demonstrated that the TDM of hydrogen sulfide (H2S) reached 2.49 × 106, followed by ethyl mercaptan at 1.58 × 104, methyl sulfide at 16.2, and dimethyl disulfide at 2.65. In addition, a series of response

Clinoptilolite (CL) has been sonochemically modified by using NaCl solution and applying a 35 kHz ultrasound in 30 min and at 60 oC. The modified clinoptlolite (SNa-CL) has been characterized by X-ray diffraction (XRD), laser scattering, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and nitrogen adsorption/desorption isotherms. Results showed that the sonochemical

This study investigated arsenic (As) and heavy metal (HM) contamination of drinking water sources in Islamabad, Pakistan. For this purpose, samples (n=60) were collected from various drinking water sources (bore wells, tube wells, tap, filtration plant, and bottled water). The physicochemical parameters of samples were analyzed, including basic parameters such as pH; electrical conductivity; total

Biological pretreatment is feasible for enhancing methane generation with crop residues. Improvement of the degradation efficiency of cellulose has always been the key to improve methane yield. The role of an anaerobic and thermophilic bacterium, Caldicellulosiruptor sp. F32, on the degradation of corn stalk was investigated. A pure bacterial pretreatment system (0.20 v/v), with 20 times CFU of 2.20×108

The dependence on chemical fertilizers and pesticides to increase agricultural outputs owing to the demands of a growing human population creates the need for a sustainable fertilizer. Biochar is presently a promising candidate as an inoculant carrier, given its highly porous structure, with nutrients naturally derived from the biomass, high water, and nutrient retention properties, which favor microbial

For efficient decomposition of dibutyl phthalate (DBP) in goat whey solution, we are using ozone (O3), ozone with zinc oxide (O3/ZnO), and ozone with zinc oxide and activated carbons (O3/ZnO/ACs) systems through catalytic ozonation process.. The performance and efficiency of system were evaluated. The results showed that ozonation of sample using O3/ZnO/ACs system was found to be the most efficient

This review paper enlightens the importance of renewable resources such as water and elaborates the role of textiles to enhance the efficiency of fog water collectors. Due to water scarcity, there is a dire need of harvesting water from all of its available resources. Fog is one of those water resources. Fog harvesting is generally considered as one the most economical and facile methods in arid agricultural

Diclofenac exerts the highest level of acute toxicity among tested non-steroidal anti-inflammatory drugs. Although there are many reports on the microbial degradation of diclofenac, gaps remain in the knowledge related to the degradation process, especially that by Bacillus subtilis. In this study, we used B. subtilis 168trpc2 and its cytochrome P450 genetic defect strains B. subtilis ΔyrhJ and B.

This study focused on heavy metal (HM) in the water and fish of the Hunza River and its tributaries, located in Gilgit–Baltistan, Pakistan. Water and fish samples were collected and the concentrations of Cd, Ni, Co, Fe, Pb, Cr, Cu, and Zn were analyzed. The maximum HM concentration observed was 87.2 μg/L for Fe in water at the Kohistan Block (downstream); the minimum HM value was found for Cd at 1

The use of eco-friendly materials are now becoming the field of interest in construction industry to ensure sustainability and healthy living. Gypsum plasters are eco-friendly building materials but are brittle in nature and hence reinforcement of these plasters using fibres has been found to be beneficial at its post tensioning stage. In this present work the control of harmful ecological impact of