Most studies that address microplastic (MP) ingestion by fish are conducted in marine environments; however, freshwater ecosystems such as rivers and streams are also important sources of these particles in coastal areas. Considering that increasing urbanization surrounding watersheds increases the sources of plastic pollution and that fish feeding behavior may influence the probability of ingestion

The carbon stored as soil organic carbon (SOC) and tree biomass is typically the highest carbon pool of the forest and is impacted by degradation and deforestation. The impact of “C” stocks on climate change at different altitudes can have vital implications for the conservation and management of “C” sinks. This study was undertaken in subtropical belt of Tehri Garhwal, Uttarakhand, India, to understand

The geo-ecosystems of the lakes play an important role in their wider geographical areas, such as energy and biological resources, as well as water sources for agriculture, industry, and drinking water. The main goal of the present paper is to develop a new approach to the effective monitoring of lakes water quality. Three new optical decision-making systems (ODMS) are being set up first as components

The aim of this study was to investigate, analyze, and compare applied techniques suitable for achieving efficient removal of organophosphorus pesticides (OPPs) (malathion and fenitrothion) from aqueous solutions and analyze the degradation products and processes. Pesticide degradation efficiency (%) was monitored by high-performance liquid chromatography (HPLC) equipped with a photodiode array detector

This study investigated the feasibility and mechanism of sulfide-modified nanoscale zero-valent iron supported on biochar (S-nZVI@BC) for the removal of TCE in the scenario of groundwater remediation. The effects of some critical factors, including pyrolysis temperature of biochar, mass ratio of S-nZVI to BC, initial pH, typical groundwater compositions, co-contaminants, and particle aging time, on

The pollution of agricultural soil due to heavy metals is a serious environmental problem throughout the world due to their persistence and toxicity. The present study was carried out on agricultural soils of district Bathinda, Punjab where a total of 120 soil samples were collected from 40 different locations during pre-monsoon, monsoon, and post-monsoon season. The total mean concentration of heavy

The Kaban Lakes Integrated Assessment Model (KLIAM) was enhanced in order to assess the possible content of antibiotics in the Kaban lakes, located within the city borders of Kazan City, Tatarstan Republic in the Russian Federation, and potential for adverse environmental effects. The Kaban Lakes Integrated Assessment Model simulations suggest that the concentrations in the Nizhniy Kaban lake and Sredniy

Disinfection byproducts (DBPs) have attracted extensive attention due to their adverse health effects such as genotoxicity, mutagenicity, and carcinogenicity. With higher formation potential and occurrence in all disinfection processes, trihalomethanes (THMs) are one of the most significant DBPs. Since ions are universally existent by natural or anthropogenic input to groundwater or surface water,

Biodiesel is a mixture of fatty acid methyl esters (FAME) from either vegetable oils or animal fats. Although biodiesel biodegrades faster than diesel fuel, the impacts of this biofuel in environment throughout its biodegradation process should be investigated. For this reason, the objective of the present study was to evaluate the microbial activity, the phytotoxicity, and the formation of metabolites

One of the limitations compromising the utilization of enzymes for the remediation of phenolic wastewaters is enzyme activity loss during the treatment. Some surface active additives have the potential to protect enzymes and, thus, improve their performance. In this study, the removal of bisphenol A from synthetic wastewater samples by laccase has been studied in the presence of rhamnolipid biosurfactant

Soil samples of 0–10 cm and subsurface depths of 10–20 cm were collected from the Phragmites australis soil in the Liaohe Estuary, and different salinities (CK, 0.5%, 1.0%, 1.5%, and 2.0%) were prepared in the laboratory under simulated water flooding; soil samples of two depths were added for cultivation under anaerobic conditions, measuring Hg and MeHg contents in soil samples. The results showed

Oil pollution caused by heavy shipping traffic in the Baltic Sea could be removed by the help of highly porous aerogels made from the waste. These could be produced from environmentally friendly cellulose, e.g., from paper waste, but would have to be hydrophobized for oil sorption. Such a cellulose aerogel was investigated in this research work. Six types of aerogel with 0.5, 1.0, 1.5, 2.0, 2.5 and

The presence of emerging contaminants (EC), such as antibiotics in water bodies, is considered an environmental issue. In this work, the iron sources FeC2O4•2H2O (FOD), complexes of iron/oxalate (Fe2+/Ox), and FeSO4 as reference were evaluated as catalysts on the degradation of pyrazinamide (10 mg L−1) antibiotic by the photo-Fenton process. Different parameters were studied such as initial pH value

In this work, we designed at the level of microscale, subsurface flow wetlands planted with Typha latifolia, and used to remove diclofenac and naproxen from solutions that contained them. The wetlands were operated for 105 days with a hydraulic residence time (TRH) of 5 days. In these conditions, the removal efficiencies for diclofenac and naproxen were 98.4% and 97.7%, respectively. Moreover, we identified

Globally, heavy metal (HM) pollution of soil is a serious problem that can lead to long-term toxic effects on soil. In this milieu, the present study investigated the eco-toxicological effects of three trace elements, e.g., cadmium (Cd), copper (Cu), and lead (Pb), on enzyme activities and microbial function and structural diversity in phaeozem and red soil samples. Hormesis effects of Cd, Cu, and

Engineered sulfate injection has been introduced as an effective technology to enhance the remediation of soil and groundwater contaminated by petroleum hydrocarbons. While some studies indicate that sulfate injection is a promising method for the treatment of hydrocarbon-contaminated subsurface systems, its application in the brackish soil environments is unknown. In this study, we explored related

Biochar is a promising material for removing metal ions from water and soil through adsorption. In this study, rice straw was pyrolyzed to prepare biochars at 300 °C (RSBC300), 500 °C (RSBC500), and 700 °C (RSBC700) in an oxygen-limited atmosphere. The biochars were used in batch experiments for adsorption of copper (Cu) ions in aqueous solution. The influence of various environmental conditions, including

The present study focuses on the simultaneous analysis of metallic species and radionuclide data from January 2009 to December 2011 in the dust deposited on filters in Málaga (Spain). Some metallic elements (Ca, Fe, K, Mg, Na, Zn, Pb, Cu, Ni) and radionuclides (7Be and 210Pb) have been determined by inductively coupled plasma-mass spectroscopy and gamma spectrometry, respectively. For this analysis

In the present study, total petroleum hydrocarbon biodegradation by wheat straw biochar and active carbon (TPH) was investigated in gasoil-polluted soil around oil refinery of Shiraz, Iran. The experiment was conducted as split-split-plot in time based on completely randomized design with three replications. Various weights of biochar and active carbon (0, 20, 40, 60, 80, and 100 g kg−1) were assigned

Twenty daily time step–based SWAT simulation models for the Duhok, Adhaim and Dokan dam watersheds, in Iraq, were implemented using five land cover (LC) and digital elevation model (DEM) of different resolutions. The optimal LC and DEM for computing the most accurate streamflow for each watershed were specified. Results indicated that delineation of the flat watersheds is significantly affected by

In this study, a vortex-assisted switchable solvent microextraction (VA-SSME) method was developed for the determination of iron by slotted quartz tube flame atomic absorption spectrometry (SQT-FAAS). A ligand synthesized from the reaction of ortho-phenylenediamine and 5-bromosalicylaldehyde was used to form a coordinate complex of iron. All experimental variables such as switchable solvent amount

This study evaluated the effect of applying biofertilizer in the soil on the cultivation of corn. Different doses of biofertilizer associated with chemical fertilizer were applied in the soil to meet the plants’ nutritional demand. Four months after sowing, plant samples were collected and evaluated, by measuring the height and productivity of biomass, dry matter, neutral detergent fiber (NDF), acid

The Nevado de Toluca Natural Protected Area (Zona de Protección de Flora y Fauna Nevado de Toluca, ZPFFNT), Central Mexico, encompasses one of the four highest (> 4000 m a.s.l.) volcanoes in Mexico, Nevado de Toluca; an extended area of woodland surrounds this volcano. Although identified as a remote area based on its high altitude, the ZPFFNT is not far from the urban and industrial zones of Toluca

The Campo and Km 119 rivers are sources of irrigation and water supply for the city of Campo Mourão, State of Paraná, Southern Brazil. However, these rivers are under the influence of agricultural and urban activities, which compromise the quality of their waters. The present study evaluated the waters of these rivers in the vicinity of this municipality in two different hydrological periods of 2018

Photocatalysis has emerged as a promising approach for treating environmental pollution. In this study, TiO2/sponge composites with good photocatalytic activity in visible light were prepared via a simple and efficient low-temperature process and applied to the degradation of 2,4,6-trichlorophenol (2,4,6-TCP) present in papermaking wastewater. The process conditions for preparing TiO2/sponge composites

In this study, the effects of As-contaminated groundwater by various minerals in the soil were evaluated. The influence of As on microbial inhibition and activities influenced by soil minerals such as clay minerals (bentonite and kaolinite) and iron oxides (hematite, goethite, and magnetite) were investigated. The method used to evaluate the effects of soil minerals on As-contaminated groundwater was

Thousands of lakes in a ~ 17,000 km2 area around Sudbury (Ontario) acidified (pH < 6) and became metal contaminated as a result of local smelting activities that have taken place since the 1880s. Middle Lake, an urban lake located in Sudbury, acidified to pH ~ 4.3, and was subsequently limed and fertilized in the 1970s and 1980s as part of experimental remediation efforts. Little is known about the

In this study, a magnetic montmorillonite composite (MMC) was prepared by a coprecipitation method, evaluated as sorbent for Cd(II) ions and characterized by IR spectroscopy, SEM, EDX, VSM, and zeta potential measurement. The adsorption potential of MMC was tested in both batch and continuous modes at different initial pH levels, sorbent dosages, contact times, ionic strengths, flow rates, and bed

An experimentation has been carried out in simulated Mediterranean and tropical laboratory conditions aimed to show the Moso bamboo capability of phytoextraction chromium from contaminated soil. Electronic microscopy supported the analyses performed on soil and on the different plant tissues. A preliminary test on the bamboo has been carried out in laboratory evaluating his growth with irrigation in

Degradation-resistant chemical contaminants of health concern such as dichlorodiphenyltrichloroethane (DDT) pesticides and polychlorinated biphenyls (PCBs) in the environment are redistributed between different environmental compartments, where they partition between biotic heterotrophic routes and abiotic features (water and immobile soil components). Their fate and the potential risk they pose is

Microplastics have been identified as a widespread, persistent environmental pollutant. The investigation of microplastics in marine ecosystems has been prevalent in the literature; however, much less consideration has been given to this form of pollution in freshwater ecosystems. Relatively few studies have considered the uptake of microplastics in freshwater mussels. This study investigated the presence

A novel magnetic pomelo peel biochar (MPPB) was prepared by hydrothermal pretreatment coupled with pyrolysis at 550 °C. Batch experiments were employed to investigate adsorption properties on biochar for Pb(II) and Cu(II). FTIR, SEM, XRD, XPS, and zeta potential were applied to characterize the biochar. The surface morphology of MPPB was rough, loose, and negatively charged and contained carboxyl and

The xonotlite was synthesized from eggshell waste and modified with toluene diisocyanate (TDI). The xonotlite and amidoxime-modified xonotlite were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). FTIR revealed that the amidoxime group was successfully grafted onto the xonotlite. Factors affecting adsorption such as solution

Creosote is a multicomponent oil classified as a dense non-aqueous phase liquid (DNAPL) produced from coal tar distillation. The concept of phase distribution is critical in decision-making to remediate contaminated sites. The creosote mass transfer between sorbed, aqueous, vapor, and DNAPL phases is controlled by physicochemical characteristics, geology of the site, and environment conditions. This

The mussel Mytilus trossulus was used to assess the relationship between the reactions of biomarkers and the degree of environmental pollution, as well as their potential use in biomonitoring. Metal bioaccumulation and a battery of biomarkers were measured in the mussels from the Zolotoy Rog Bay and Vostok Bay (Peter the Great Bay, the Sea of Japan) that display substantial differences in the levels

Studies on the removal of polyphenols from sugarcane vinasses using three upflow anaerobic sludge blanket (UASB) reactors operating isothermally at temperatures of 45, 55, and 65 °C are presented. The procedure started evaluating the stability of the reactors through the quantification of four important parameters of the process: temperature, pH, alkalinity factor, and acetic acid production. The physical

Water scarcity has continuously increased over the last decades in countries like Egypt, where agriculture consume > 85% of the country’s water. Increased urbanization, industries, and expensive advanced treatment processes further aggravate this challenge, causing the use of poorly treated or untreated wastewater for crop irrigation. The current study investigated an eco-friendly technology consisting

In this study, betel nut husk (BNH) was used to produce activated hydrochar using sodium hydroxide (NaOH). Activated BNH hydrochar (BNH-HAC) served as an adsorbent for methylene blue (MB) adsorption. The produced BNH-HAC was characterized by identifying its textural, morphological, and chemical properties. Batch equilibrium method was conducted to examine the factors that influenced MB adsorption by

Phytoremediation is a cost-effective and relatively cleaner method for remediating contaminated areas using plants. Certain plants, including some sunflower species, have already been identified as potential phytoremediation candidates because of their ability to accumulate heavy metals. This study investigated the ability of Tithonia rotundifolia (red sunflower) to accumulate lead from lab-contaminated

In this study, composite ACCF-A was synthesized using activated carbon (AC), copper ferrite (CF), and alginate (A) and used as adsorbent to remove methylene blue dye from aqueous solution. The beads were prepared by incorporating AC/CF nanocomposites into alginate by an ionic gelation method. The synthesized ACCF-A composite was characterized using FTIR, SEM, EDX, BET, TGA, and zeta-potential. The

Effective treatment of dairy wastewater with efficient removal of antibiotic-resistant bacteria (ARB) is a great challenge for reuse of treated wastewater. Antibiotics are widely used in human and veterinary medicine, and antibiotics misuse has led to occurrence and spread of antibiotic-resistant bacteria (ARB). Reuse of treated wastewater for irrigation is a solution to deal with water shortage in

The use of roadway deicers, typically made of sand or salt, is essential for achieving safe roadway conditions by reducing ice and snow. Unfortunately, deicers can have detrimental effects on the surrounding infrastructure and environment. Traditional inorganic deicers, such as abrasives and chloride salts, have the most widespread usage, but recent concerns of the negative effects of chlorides on

Agroforestry practices coupled with wastewater irrigation systems are sustainable strategies for water management. The performance of these practices could be improved by rhizobioaugmentation. This approach would be particularly useful in developing countries where it can be used as a low-cost tool to control widespread environmental contaminations. The main objectives of the present study are to (1)

Severe environmental pollution could occur in water bodies which serve as the discharge sites for improperly treated palm oil mill effluent (POME). This is because POME increases the chemical oxygen demand (COD) and suspended solids (SS) of the water body. This issue is addressed by investigating the use of raw and calcined limestone (800 °C) in a horizontal roughing filter to eliminate SS from POME

Magnetic Co0.5Zn0.5Fe2O4 nanoparticles were prepared by the nitrate-alcohol-solution combustion and calcination technique. The morphology and composition of Co0.5Zn0.5Fe2O4 nanoparticles were characterized by the scanning electron microscopy (SEM), the transmission electron microscopy (TEM), the X-ray diffraction (XRD), the energy-dispersive spectroscopy (EDS), the vibrating sample magnetometer (VSM)

This article relates epilithic dry- and wet-seasonal bacterial biofilm composition to water quality along Río de la Sabana near Acapulco, Mexico. Samples were taken from various locations including nearly pristine upland locations, adjacent to residential floodplain developments, and immediately upstream from an estuarine lagoon. Bacterial composition was identified through sequential DNA analysis

Anaerobic bioremediation of tetrachloroethylene (PCE) under high concentration conditions is difficult. Anaerobic dechlorination of PCE occurs with synergetic reactions, fermentation, and sulfate-reduction; however, the way in which high concentrations of PCE affects these reactions is still poorly understood. This study aims to elucidate how high concentrations of PCE affect fermentation and sulfate-reduction

Due to the serious pollution and great harm of steel pickling waste liquor, the treatment of the waste liquor with high concentration of iron ion has been a problem in a lot of countries around the world. A simple electrochemical method is proposed for recovering iron from steel pickling waste liquor with graphite plates as electrodes. This study investigated the effects of reaction parameters on the

The continuous use of agricultural inputs for grain, fiber, and energy production in the Brazilian savannah can increase heavy metal (HM) concentrations in the soils. In this context, we aimed to determine the natural concentrations and establish the quality reference values (QRVs) of HMs in reference soils of a sedimentary watershed under native vegetation in one of the latest agricultural frontiers

Biochars from Chinese medicine material residues and furfural residues at 300–600 °C (MBC300–MBC600 and FBC300–FBC600) were used as adsorbents for removing tetracycline (TC) from water. The influence of pH and co-existing of cations or low molecular weight organic acids (LMWOAs) was investigated on TC adsorption. Further, the bulk biochars were treated by ball milling into sub-micron particles, and

In this study, a pre-isolated dye-decolorizing bacterium, Pseudomonas aeruginosa ZM130, was tested to explore its potential for the treatment of synthetic and real textile wastewaters in aerobic and anaerobic bench-scale sequencing batch bioreactors (SBRs) as well as in constructed soil columns. The decolorizing ability of strain ZM130 against reactive black-5 (RB5) was optimized following a response

Steelmaking slag, a by-product of the steel-refining process, could be used for removing boron excess from irrigation natural and waste waters, due to its strongly alkaline reaction. The objectives of this study were to: (a) establish the optimum conditions (external solution/adsorbent ratio, equilibration time) of boron adsorption by the slag, (b) assess the slag’s capacity to adsorb boron, and (c)

The concentrations of heavy metal (copper (Cu), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn)) were measured in Acer(A.) pseudoplatanus tree bark to evaluate its suitability as a bioindicator of air pollution in downtown Toronto, Canada. The analysis of digested tree bark samples was carried out by inductively coupled plasma optical emission spectrometry (ICP-OES) for Cu, Mn,

The concentrations of phosphorus (P) and nitrogen (N) in runoff from cropland areas may be influenced by accumulation and release of P and N by stalk residues. A laboratory study was conducted to measure the effects of time since harvest and immersion period on accumulation and release of P and N by corn, soybean, and wheat stalks. Experimental variables included type of stalk material (corn, soybean

Biowastes are the main fraction of municipal solid waste (MSW), and of this, food waste (FW) is the predominant component. Given that FW is predominantly biodegradable organic matter, approach strategies such as anaerobic digestion (AD) are suitable to apply on these substrates because these process also produces methane gas as a renewable energy source, particularly important given the depletion of

Respiratory quotient (RQ) is a parameter proposed as a tool for practical and online monitoring of petroleum hydrocarbon biodegradation. Various environmental factors and remediation conditions affect RQ values. Occasionally, actual RQ values deviate from theoretical RQ values of petroleum hydrocarbon biodegradation. In addition, different RQ calculation and interpretation approaches investigated in

For plant growth, cadmium (Cd) is a toxic and easily accumulated element but silicon (Si) is beneficial. To explore the alleviating effect of Si on Cd toxicity to plants in Cd-contaminated calcareous soil, the effect of Si on Cd absorption was investigated for cucumber organs in pot experiments. The Cd concentration of cucumber organs using an atomic absorption spectrophotometer. The Si significantly

Global pollution of mercury (Hg) threatens ecosystem and human health. We measured total Hg (THg) and monomethylmercury (MMHg) concentrations in filter-feeding blackfly (Simulium spp.) larvae in the inflows and the outflows of six boreal lakes with no Hg point source pollution. THg in the larvae ranged from 0.03 to 0.31 mg kg−1 dw and MMHg between 0.02 and 0.25 mg kg−1 dw. The proportion of MMHg in

This study investigated the long-term stream water quality trends of nine catchments in Hong Kong with different levels of urbanization using monthly water quality data for a 30-year period at annual and seasonal (wet and dry) scales. Raw data were modeled using redundancy analysis and Mann–Kendall test. Only one river showed a clear difference of water quality responses between the upstream and downstream

The main objective of this research was to study the feasibility of using algal and algal-activated sludge systems in treating laundry wastewater. Three different types of systems—green microalgae (system A), diatoms + activated sludge (system B), and green microalgae + activated sludge (system C)—were studied at six different solid retention times (SRT)—6, 8, 10, 12, 14, and 16 days—to evaluate their