Sewage discharges constitute severe stress in freshwater ecosystems. The Ramalhoso River belongs to the Tagus River watershed and was chosen for a pilot study on the impact of wastewaters discharges in a freshwater ecosystem and its ability for self-depuration. Twelve water samples were collected along the river and were georeferenced. The first point is located upstream of the first discharge point

Road salt (NaCl) and acid deposition co-occur across much of North America and Europe. One such region is the Adirondack Park (AP) in New York, USA, where the effects of acid deposition have been widely studied and the effects of road salt have not. Road salt delivers 3560 Mmolc of Na to AP roads each year, which has significant potential to displace soil base cations and exacerbate ecosystem recovery

This study aimed to investigate the diversity and distribution pattern of tree in different altitudes in a protected area of Churdhar Wildlife Sanctuary (CWS), situated in Himachal Pradesh, Western Himalaya, India. CWS is one of the famous sanctuaries and rich in biodiversity. The tree species analysis was done with the stratified sampling technique by performing a random sampling using the quadrats

Boreal lakes with soft water and low buffering capacity are susceptible to excess ion loading resulting from metal mining. The impact of two Finish mining sites in downstream lakes was assessed with a chronic sediment toxicity test using a laboratory-reared freshwater Lumbriculus variegatus (Oligochaeta). The test organisms were exposed to mining-contaminated natural lake sediments and hypolimnion

Amphibians find a suitable habitat in rice agroecosystems, but their viability is affected by the sublethal effects of agrochemicals. Animal condition, external morphology, and liver and male gonad tissue histology were examined on Lysapsus limellum and Rhinella bergi, common species that occurs in rice fields (RF) and reference sites (RS) from Santa Fe and Chaco provinces, Argentina, respectively

Soil amendments can be an effective and low-cost treatment to reduce metal bioavailability of contaminated dredged sediments disposed on land. The effect of green waste compost addition on Cu, Cr, Ni, Pb, and Zn extractability and bioaccumulation in lettuce was studied in a greenhouse experiment, using dredged sediments from different sites of the Matanza-Riachuelo River (Argentina). Moreover, the

Fish are an important food and economic source in the Amazon region. However, several researches report high levels of mercury, mainly methylmercury (MeHg), in these animals. MeHg is capable of biomagnifying in the ecosystem and negatively affect human health. Amazon region is recognized for its great diversity of fish species and high daily consumption of fish, extremely vulnerable to the toxic effects

The functionalized biochar was assembled on modified zeolite to synthesize a novel modified composite adsorbent. The latter was applied to simultaneous adsorption of ammonium and nitrate. The Box–Behnken design (BBD) in response surface methodology (RSM) was applied to optimize the parameters, which included ratio of raw materials, adsorbent dose, pH, and temperature. The chemical functional groups

Abstract Amoxicillin (AMX) is an antibiotic that has been added to the watch list of substances by the European Union, through the Water Framework Directive (WFD; 2000/60/EC) and its daughter regulation (Decision 2018/840) for which monitoring data have to be gathered with a possibility for future regulation. Previous studies have demonstrated that this antibiotic generates toxic effects, among which

Metal mining extraction and concentration need water. The recycling of liquid effluents reduces its consumption. This recycled water must contain low concentrations of metals. This project’s first objective was to start up a laboratory-scale upflow anaerobic sludge blanket (UASB) reactor for biotransforming metal sulfates into metal sulfides of effluent from flotation units of a mining plant (FE).

Plastic is a ubiquitous material used across the globe. It is easily transported to various habitats and can then be ingested by animals, with the potential to bioaccumulate up the food chain further. Although classified as solid waste, some plastics can be considered hazardous waste due to the chemicals used in the production process and those that can be adsorbed, such as hydrophobic pollutants in

Decachlorobiphenyl (DCB) is one of the 209 polychlorinated biphenyls congeners characterized by its high toxicity and chemical stability. It is produced by industrial activities. A possible strategy to eliminate DCB is by bacterial degradation. The main objective of this study was to define the optimal conditions for biodegradation and bioaccumulation of DCB by Pseudomonas extremaustralis ADA-5 isolated

The present work aims to study the effect of disk material and disk surface roughness on the oil recovery rate and oil recovery efficiency. Materials used in this study were steel, plastic, and woven fabric; two types of oil were used, namely, SAE50 and used car engine oil. The oil recovery rate was found to increase with increasing disk rotational speed. The rate of oil recovery ranged from 88.19

Intensified vehicular traffic causes increased heavy metal contamination of the environment. We investigated the heavy metal chemistry of soils located under silver fir stands in the vicinity of Poland’s S7 roadway. Three sampling sites were located in fir stands in central Poland. Fieldwork included soil sampling of the organic (O) horizon and mineral (A) topsoil. We analyzed the soil pH, carbon (C)

Acid mine water was treated with fly ash zeolite (FAZ), followed by different active chemicals to know its suitability for crops. Acid mine drainage (AMD) was obtained from Gorbi abandoned opencast mines of Singrauli, Northern Coalfields (NCL), India. The AMD was treated with 20 g/l dosing of fly ash zeolite, followed by different precipitating chemicals, using different doses of Ba(OH)2, BaCO3 and

Calcium (Ca) concentrations in lakes have declined in many regions, and concerns have been expressed that Ca levels are falling below biologically significant thresholds. Wood ash additions to soil are typically used to combat soil acidification, and it is unclear whether wood ash additions to upland soils will lead to higher Ca leaching to surface waters. In this study we applied fly ash or bottom

The objective of this study is to evaluate the water quality of the Lien Son irrigation system in Vietnam and identify the critical pollutants that affect the system’s water quality. Firstly, the water quality at fifteen locations distributed along the main Lien Son drainage and irrigation canals was monitored in the dry season (from January to March) for 3 consecutive years (2018, 2019, and 2020)

Phosphate (PO43−) and nitrate (NO3−) contamination causes the threatening issue of eutrophication. A major waste from seafood industries of various seashells including Anadara inaequivalvis, Saccostrea commercialis, Perna viridis, Tegillarca granosa, Filopaludina martensi, Babylonai areolate and Meretrix lusoria was thermally modified and investigated for PO43− and NO3− removal from synthetic and domestic

The elemental analysis of road dust can be used to determine the contribution of traffic-related metal emissions to the local environment. Previous studies have shown that brake wear, tire wear, and lead wheel weights release significant amounts of metals that lead to decreased biodiversity and degradation of urban streams. Highway pavement has not previously been considered as a source of metal inputs

The aerobic granular sludge (AGS) technology has shown a great potential for effectively removing oxytetracycline (OTC) from wastewater in an environmentally friendly way. In this study, the removal mechanism of OTC by the AGS process was investigated. The results showed that AGS has adsorption behavior to OTC and biodegradation at the same time. The adsorption process of OTC by AGS that before acclimation

The variations of the concentration and characteristics of particulate matter (PM) are influenced by several factors, such as emission sources and meteorological conditions. In this study, fine particles (PM2.5) and ultrafine particles (PM0.1) were simultaneously collected during summer and winter in Hanoi, Vietnam, to clarify the behavior of PM0.1 (which is rarely observed in this region) by characterizing

One of the most important wastewater treatment processes is microelectrolysis, which is extensively used in the primary treatment of pharmaceutical wastewater. In this study, microelectrolysis, as a pretreatment method for the refractory metronidazole pharmaceutical wastewater (MPW) of choice, was improved using the Fenton process and used to remove the chemical oxygen demand (COD) and improve the

The research aims to analyse the treatment possibility of Cd-polluted soil using electrokinetics driven by solar power in comparison with driving by direct current power. Meanwhile, the effects of electrolyte on electrokinetics were investigated. Five runs of electrokinetics were carried out using different electrolytes and energy sources. Experimental results showed that the combined application of

Plastic debris sized from 0.33 to 5 mm or so-called microplastic is an abundant environmental pollutant found worldwide in various ecosystems. The contamination has been threatening animals such as fish, wild birds, domesticated poultry, and waterfowls. This preliminary research aimed to reveal the evidence of microplastic contamination in domesticated duck to prove that plastic contamination has spread

Plastic debris at micro- and nanoscales has been detected in widespread aquatic environments. Accordingly, microplastics primarily pose serious threats to freshwater ecosystems, causing physical and histophysiological damage similar to that in marine environments. The sources, fates, and toxicities of microplastics in freshwater ecosystems are detailed in this review. Additionally, microplastics serve

Over the last two decades, atmospheric sulfur dioxide (SO2) concentrations have decreased in air-polluted regions. However, this decrease was accompanied by a rise in cloud water acidity (pH), which remains below 5. With this change, gas-phase hydrogen peroxide (H2O2) exceeded SO2 in most of these regions. These conditions where SO2 < H2O2 occurred at Mt. Norikura (2770 m.a.s.l.) during the 1900s.

The degradation and mineralization of 2-propanol (IPA) in an aqueous solution were investigated using a TiO2 photocatalyst immobilized on a nonwoven fabric, both in the presence and absence of O3 microbubbles and H2O2. The influence of parameters like the H2O2/O3 molar ratio and the type of ultraviolet (UV) lamp used on the IPA degradation reaction was investigated. The main active species in IPA degradation

Controlling the bioaerosol present in indoor environments has been evidenced to be extremely necessary. An alternative is to develop filter media for air conditioners that have biocidal properties. This study aimed to verify the biocidal effect of a high-efficiency particulate air (HEPA) filter medium modified with the deposition of nanoparticles on its surface. For this purpose, Ag, TiO2, and Ag/TiO2

This study used AEDT 2.d to estimate the pollutant emissions at Montreal’s Pierre Elliott Trudeau International Airport (YUL) for 2015 while quantifying the impact of the airport’s taxi time and atmospheric conditions on aircraft emissions. Using the more airport-specific parameters available and ICAO standard values otherwise, the yearly emissions of NOx, HC, CO, PM10, SOx, and CO2 at YUL were, respectively

With the global concern on the role of wastewater treatment technologies in manifesting the emergence and dissemination of antibiotic-resistant bacteria (ARB), it has now become imperative to analyze the emerging technologies for handling them. This study assesses the efficiency of two deep constructed wetlands (CWs) receiving partially treated sewage from a residential complex and a hospital designed

The influence of silver nanoparticles (AgNPs) on microbial biofilm colonization on natural calcareous rocks was studied in the Campeche marine intertidal environment in southeast Mexico. The biofilm formation was assessed by color spectrophotometer measurements represented in the CIELAB color space, digital image analysis, confocal laser scanning microscopy, biochemical biomarkers, and enumeration

The objectives of this study are to test the penetration depth and determine the soil content in hydrocarbons’ components BTEX, PAHs, and TPH, after vertical movement of crude oil through undisturbed soils of different textures, and to assess their risk. The experiment simulates the fate of oil spills in the cold season. Three soil types were investigated: a sandy-textured eutric Arenosol, AR-eu; a

The increasing use of plastic products and its inevitable decomposition after improper disposal has led to large numbers of nano- and microplastic in aqueous environments. There is currently a critical need to investigate the transport and retention mechanisms of nanoplastic particles in water-saturated porous media (e.g., aquifers or sediments) to better understand residence times and ecosystem exposure

Since dolochar is a sponge iron industry waste with limited reuse options, it is important to develop useful applications for this waste stream. Here, the adsorption efficiency of dolochar for copper (Cu) was evaluated under a varying parameters including adsorbent dose, contact time, initial concentration, pH, stirring rate and temperature, via batch analysis. Complete Cu removal (100%) with a maximum

Community-based forest management provides an opportunity to build a sustainable link with ecology for meeting future needs. A study was carried out to understand the effect of management strategies on the biodiversity, soil nutrient, and carbon stock of two community forests practiced by Jamatia (JCF) and Halam (HCF) tribes of Tripura, northeast India. The forest managed by Jamatia is community conserved

Cyanobacteria are microorganisms capable of releasing toxic metabolites in freshwater, deleterious to humans and other living organisms even in very low concentrations. Removing both cyanobacteria cells and their metabolites in conventional water treatment systems is still a challenge that needs to be addressed. This paper evaluated the use of Moringa oleifera saline extract and polyaluminum chloride

Microbial contamination of water is a significant burden to public health, particularly in low- and middle-income countries. To develop an affordable and user-friendly method for detecting microbial water contamination in resource-limited settings, a business card-sized device, named the MicroBioPAD, was developed using filter paper saturated with the chromogenic sugar X-Gal. This device was compared

The main objective of this work is to use soybean hull (SBH) waste as an adsorbent for the removal of two industrial textile dyes: Reactive Blue 21 (RB21) and Reactive Yellow 145 (RY145). Physical characterization of SBH and kinetic and equilibrium experiments were performed to determine the adsorption conditions. The best adsorption condition was pH 2.0 because the zero electrical charge of soybean

The Air Quality Health Index (AQHI) is an aggregate indicator of air pollution used to communicate to Canadians the health impact of short-term exposure to current air pollutant levels. Understanding the stochastic behaviour of the AQHI can aid public health officials in predicting air pollution levels, determining the likelihood and duration of air quality advisories, and planning for increased strain

The use of rice straw for biochar production has been widely proved as a great alternative energy source, which not only is cheaper than other commercial coals but also helps mitigation of climate change. In this study, the rice straw–derived biochar was assessed as a sorption material used for livestock wastewater treatment, which has not much been studied so far. The biochar derived from rice straw

At present, water pollution becomes a very significant environmental issue. Heavy metals and organic dyes present at higher concentrations in water are dangerous for aquatic life and humanity. Chitosan nanocomposites have been used for the adsorptive removal of heavy metals and dyes due to their improved chemical activity. This paper encompassed the synthesis of chitosan-nSiO2 nanocomposites and was

Natural geochemical processes and anthropogenic activities produce selenium (Se)-containing wastewater, in which selenium is present as selenous acid (Se(IV)) and selenic acid (Se(VI)). Herein, we evaluated the Se removal performances of magnesium oxide (MgO) with different crystallinities at pH 10.5. Normal MgO and low-crystalline (LC-MgO) were reacted in 1, 2, and 5 mg dm−3 Se(IV) or Se(VI) solution

Immobilization of mercury (Hg) leaching from bank soils of East Fork Poplar Creek (EFPC) is considered part of remediation strategies to mitigate the amount of Hg entering the creek. Different approaches are currently being evaluated, such as utilizing engineered sorbents to immobilize Hg species in EFPC bank soils. However, the influence of environmental microbes on the immobilization of Hg by sorbents

In the present study, fipronil degradation was evaluated in typical chlorination conditions (fipronil: 20 μg L−1; free chlorine concentration: 2 mg L−1; pH 7.5; 25 ○C). Fipronil was quickly degraded by chlorination with half-time life of 2.08 min, achieving 95% of degradation in 15 min of reaction. For identification and elucidation of its disinfection by-products, fipronil solutions (2.0 mg L−1) were

The effectiveness of water management in reducing cadmium (Cd) accumulation in rice grain has mainly been investigated in slightly and moderately contaminated soils but seldom in heavily contaminated soils. In addition, how soil physicochemical properties influence the effectiveness of water management merits investigation. In this study, a pot experiment was performed using six soils of slight (S1)

We investigated the effects of Fe-mining tailings of the Fundão dam on water quality, concerning physical and chemical parameters, aiming to infer the recovery process of the affected areas, and prospects of water quality in the coming years. Water quality data from the Gualaxo do Norte and Carmo rivers were evaluated in three moments: (i) before the dam rupture (1999–2000), (ii) 1 year after the rupture

Behavioral endpoints are important parameters to assess the effects of toxicants and other stressors on natural ecosystems. The relevance of these parameters has caused a rise in their use in aquatic ecotoxicology. However, abiotic and biotic parameters may interact causing changes in the behavioral responses. Among those parameters, starvation of animals is a factor that is usually applied in ecotoxicological

In the present work, a natural zeolite was first treated with a sodium chloride salt and subsequently modified with different cetyltrimethylammonium bromide (CTAB) concentrations for dicloxacillin removal. All the employed materials are characterized by several analytical techniques. Antibiotic sorption behavior was evaluated according to diverse parameters such as the effect of contact time, initial

The present study reports the potential of carbon (C) storage in traditional agroforestry systems (i.e., a set of age-old agroforestry systems) under waterlogged environmental conditions from north-eastern India. An experiment was conducted in a farmer’s field and further used CO2FIX model, allometric equations, and destructive sampling methods to know the potential of C sequestration. In this study

Alachlor is a chloroacetanilide herbicide, which is extensively used in agriculture globally. It is proposed that it is a carcinogen and an estrogen too. Earthworms are largely involved in increasing the soil fertility, and excess use of this herbicide may result in toxicity to burrowing organisms like earthworms. In this context, the current intent of the proposed work is to assess the toxicity of

Environmental liabilities have become one of the most important problems at environmental level, especially those located in urban areas. Within the area of the Río de la Plata coastal plain, industrial waste abandoned by an ancient sulfuric acid industry in a sector of the petrochemical center constitutes an environmental liability composed mainly of fragments of native sulfur. The aim of this work

World’s food production relies on crops grown in irrigated land to feed an increasing population. In the long term, irrigation agriculture may cause environmental deterioration to the area (soil degradation, aquifer contamination) and its surroundings (greenhouse gas emission, eutrophication) to compromise crop production. Three irrigated areas in northern Mexico (Yaqui Valley, Delicias, Comarca Lagunera)