Water Emerging Contaminants & Nanoplastics最新文献

{"title":"Identification, removal of microplastics and surfactants from laundry wastewater using electrocoagulation method","authors":"Naveenkumar Ashok Yaranal, Saket Apparao Kuchibhotla, Senthilmurugan Subbiah, Kaustubha Mohanty","doi":"10.20517/wecn.2023.46","DOIUrl":"https://doi.org/10.20517/wecn.2023.46","url":null,"abstract":"Microplastics (MPs) and surfactants are generally recognized as emerging contaminants with complicated ecotoxicological impacts. The majority of study data refers to laundry wastewater as a substantial source of MPs and surfactants in the aquatic system, which reaches aquatic environments through sewer discharges even when wastewater treatment facilities retain them. This study focused on releasing and removing contaminants from laundry wastewater, particularly MPs and surfactants. The electrocoagulation method was used to remove the pollutants from laundry wastewater. According to the results, a reference load of 2 kg of synthetic materials releases 92,700 to 1,14,300 synthetic microfibers (MFs). MFs, surfactants, and chemical oxygen demand (COD) removal efficiency are higher at neutral pH. The percentage removal efficiency of MFs, surfactants, and COD was 97.9%, 91.2%, and 86.3%, respectively, at an operating time of 25 min, a current density of 300 A/m2 with optimum power consumption. The total operation cost of laundry wastewater treatment by electrocoagulation was US$0.53 /m3. The readers will gain a complete understanding of the removal of MFs and surfactants from laundry wastewater using the electrocoagulation technique.","PeriodicalId":497971,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":" 85","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135340633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microplastic removal by coagulation: a review of optimizing the reaction conditions and mechanisms","authors":"Muhammad Tariq Khan, Mushtaq Ahmad, Md Faysal Hossain, Asim Nawab, Iqbal Ahmad, Khalil Ahmad, Sirima Panyametheekul","doi":"10.20517/wecn.2023.39","DOIUrl":"https://doi.org/10.20517/wecn.2023.39","url":null,"abstract":"Coagulation is a widely employed technique for removing suspended particles from water and wastewater, and recently, it has gotten attention as a popular method for the removal of microplastics (MPs). Studies on coagulation-based removal of MPs are still in their infancy, and few findings are available about this treatment approach, its mechanism, and removal efficiency. Given these gaps, this study was designed to comprehensively investigate recent advances in the removal of MPs via coagulation. The influence of various experimental factors such as coagulant type, dose of the coagulant, pH of the solution, and shape of the MPs are critically reviewed. The study findings showed that optimizing environmental conditions during the coagulation process is crucial for improving the removal of MPs and reducing energy costs. The study findings showed that the coagulation efficiency of MPs depends on optimal reaction conditions, which may vary depending on the type and concentration of MPs and the characteristics of the water or wastewater being treated. Optimizing these reaction conditions is, therefore, critical to achieving maximum removal efficiency. More extensive research is required to reveal the mechanisms of coagulation in controlling floc density and removing pollutants from effluent. Consequently, the current review aims to highlight the gaps and challenges associated with coagulation techniques for the removal of MPs during wastewater treatment. Current advancements in the synthesis and chemical modification of bio-based coagulants and their coagulation performance for the removal of MPs could constitute a paradigm shift in ecosystem protection and sustainability. The use of eco-friendly coagulants and combining coagulation with other techniques are suggested to increase the efficacy and viability of this method. This review will provide significant insights for field researchers, guiding their future investigations and contributing to the advancement of knowledge.","PeriodicalId":497971,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"5 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136159678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of polyoxometalates and their composites for the degradation of antibiotics in water medium","authors":"Debasish Pal, Subhadeep Biswas, Ashish Kumar Nayak, Anjali Pal","doi":"10.20517/wecn.2023.40","DOIUrl":"https://doi.org/10.20517/wecn.2023.40","url":null,"abstract":"This paper summarizes the potential of polyoxometalate (POM)-based catalysts in view of pharmaceutical wastewater treatment and recent advances that took place in this field. POMs are anionic clusters of transition metals, which exhibit unique characteristics such as high catalytic activity and multi-electron redox properties. Recently, they have been explored by some research groups for degrading antibiotics and pharmaceutical compounds (PCs) from contaminated water matrix. Several modifications of POM, along with their composite formation with new-age materials like g-C3N4 and reduced graphene oxide (RGO), have led to the formation of novel photocatalysts, which have also been reported as active materials to destroy the PCs. These promising catalysts have revealed the efficiency of complete destruction of these recalcitrant compounds within a short reaction time and showed good reusability characteristics. Among the widely used PCs, the notable ones include tetracycline (TC), sulfamethoxazole (SMX), ciprofloxacin (CIP), etc. Most of the articles cited here centered on TC degradation followed by other drugs. The effects of different operating conditions, degradation efficiency, and mechanism and stability aspects of various POM-based catalysts are discussed. The current knowledge gap in this area with bright future perspectives is also highlighted. The description will provide valuable insight to the research community regarding the capability of POM-based catalysts to eliminate antibiotics, as well as designing highly efficient catalysts for a sustainable future.","PeriodicalId":497971,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"34 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136382080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microplastics in the cryosphere - a potential time bomb?","authors":"Christine C. Gaylarde, José Antônio Baptista Neto, Estefan M. da Fonseca","doi":"10.20517/wecn.2023.27","DOIUrl":"https://doi.org/10.20517/wecn.2023.27","url":null,"abstract":"Microplastics (MPs) have been detected in many parts of the world in snow, hail, sea ice, glaciers, and permafrost. The ubiquity of microplastic around the globe means that there is a need to focus on its circulation dynamics in the Earth's diverse ecosystems; the prominence of MP fibers, which has been indicated as of human clothing and activities, in high altitude frozen water is explained by their enhanced suspension in the air, allowing them to be transported over long distances from urban centers. The MP particles can act as nucleation centers for ice crystals and, once incorporated, reduce the albedo (reflective capacity) of the frozen mass, causing temperature increases. However, cores have indicated that ice in glaciers may remain frozen for thousands of years. This article reviews the quantities and types of MPs that have been detected in snow, hail, sea ice, and glaciers. The potential for release of these, as well as MPs in the permafrost, following global warming, is discussed. As the global warming process evolves, these sites will act as additional sources of MPs accumulated over the course of recent human history. It is important to be aware of the future entry of microplastic into the global environment from these sources, especially into the already fragile extreme ecosystems of the cryosphere.","PeriodicalId":497971,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lipid and protein oxidation in <i>Cyprinus carpio</i> muscle by environmentally relevant concentrations of glibenclamide","authors":"Ericka María Guadalupe Martínez-Viveros, Octavio Dublán-García, Karinne Saucedo-Vence, Ana Gabriela Morachis-Valdez, Luis Alberto Cira-Chávez, Leobardo Manuel Gómez-Oliván","doi":"10.20517/wecn.2023.17","DOIUrl":"https://doi.org/10.20517/wecn.2023.17","url":null,"abstract":"Diabetes mellitus (DM2) was considered a more common comorbidity and was associated with high mortality due to metabolic disease in the COVID-19 pandemic. For this reason, glibenclamide (GLI) was commonly prescribed for its control. However, it has been found in environmentally relevant concentrations in various water reservoirs due to its high consumption. Common carp (Cyprinus carpio ), besides its nutritional properties and economic importance, is also considered a good bioindicator for assessing environmental health and pollutants presence; nonetheless, there are currently insufficient studies on the effect of GLI on the physicochemical and textural properties of the muscle of this bioindicator species. In this study, the effect of this drug at two environmentally relevant concentrations (50 and 1,000 ng/L) at five exposure times (every 24 up to 96 h) on the quality of carp muscle was investigated. Parameters such as carbonylated proteins, lipid peroxidation, total sulfhydryl content, water holding capacity, pH, electrophoretic profile, and texture profile analysis were determined. Regardless of the concentration of GLI used, the evaluated parameters showed significant muscle damage; therefore, it must be emphasized that this emerging pollutant not only damages environment, but also affects edible species present in different water reservoirs.","PeriodicalId":497971,"journal":{"name":"Water Emerging Contaminants & Nanoplastics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135436907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}