Emerging Contaminants最新文献

{"title":"Kinetics of and solvent effects on photodegradation of hexachlorobenzene (HCB) and endosulfan (endosulfan I and endosulfan II) in solution","authors":"Ye Wu ,&nbsp;Yan Lv ,&nbsp;Jun Jin ,&nbsp;Yuhao Fan ,&nbsp;Ru Li ,&nbsp;Junsong Bao ,&nbsp;Junjie Jiang ,&nbsp;Jiali Han ,&nbsp;Ying Wang","doi":"10.1016/j.emcon.2024.100379","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100379","url":null,"abstract":"<div><p>Organochlorine pesticides are chlorinated hydrocarbon compounds. The production and use of organochlorine pesticides have been restricted around the world because they are persistent and toxic and able to undergo long-range transport and bioaccumulate. It is necessary to develop efficient techniques for eliminating organochlorine pesticides from environmental media, and we also need to better understand how these techniques operate. Understanding how organochlorine herbicides behave in various environmental settings is very crucial. We looked on the photodegradation of endosulfan (endosulfan I and II) and hexachlorobenzene (HCB), two common organochlorine insecticides. Tests were conducted with pesticides at different concentrations, dissolved in various organic solvents, and exposed to light at different wavelengths. Density Functional Theory (DFT) was employed to study solvent effects. Degradation kinetics followed first-order models. The pesticides dissolved in various organic solvents showed a decrease in their degradation rates in the following order: toluene &gt; acetone &gt; n-hexane. It was discovered that there was a good chance the Cl atoms on the benzene ring in HCB would be eliminated through nucleophilic processes. It was discovered that endosulfan breaks preferentially at the S<img>O double bond. The findings will aid in the development of strategies for successfully eliminating organochlorine pesticides from environmental media by aiding in the prediction and assessment of the photochemical behaviors of the pesticides under various environmental circumstances.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000805/pdfft?md5=66bde4b2ba0dcf778665fc9837b7e475&pid=1-s2.0-S2405665024000805-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141328447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracking of microplastics distribution patterns and their characterisation in deposited road dust from Dhaka city, Bangladesh","authors":"Mohammad Toha ,&nbsp;R-Rafiul Rahman ,&nbsp;Sadia Sikder ,&nbsp;Md Ahedul Akbor ,&nbsp;Md Mostafizur Rahman","doi":"10.1016/j.emcon.2024.100381","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100381","url":null,"abstract":"<div><p>The widespread presence of microplastics (MPs) in road dust has considerable concern regarding their potential risks to ecosystems and human health. Despite the massive production of plastic, the erudition of MPs distribution patterns in various sizes of deposited road dust is still limited around the globe. Thus, the aim of this research is to provide an unambiguous picture of MPs distributional pattern, identification, classification, quantification, and features from road dust in various zones and types of roadways in Dhaka, Bangladesh. This study examined MPs in road dust samples with particle sizes ranging from 300 to 150 μm (Group-A), 149-75 μm (Group-B), and &lt;75 μm (Group-C). This work extracted MPs from road dust using 30 % H₂O₂, 1.6 g/cm³ ZnCl₂, and 0.45 μm filter paper. A fluorescent microscope (Motic B410E, Germany), Motic Pictures, and 3.0 ML software were utilized to identify MPs visually. Additionally, FTIR and SEM were utilized to determine the chemical composition of MPs. Group-A Road dust samples had a significantly higher concentration of MPs (38945 items/kg) compared to Group-B and &lt;75 μm Group-C dust (16720 and 5945 items/kg, respectively). The distribution hierarchy for total MPs on average by location and type of road is as follows: paved road (355 items/5 g) &gt; unpaved road (325 items/5 g) &gt; soil samples (294 items/5 g), roadside dust samples (284 items/5 g), and mid-road (283 items/5 g). By taking into account all sizes of road dust samples, the MPs were classified as fiber (70.26 %), fragment (26.12 %), beads (0.66 %), films (1.32 %), and foams (1.58 %). It was found that adults inhaled MPs an average of 1612 items/day, while they ingested an average of 880 items/day. Children had an inhalation rate of 1232 items/day and an ingestion rate of 10267 items/day, which was 4–17 times greater than in other countries. This study identified 22 MPs polymer types, and SEM results show that MPs surfaces are being weathered into nanoplastics, creating a more hazardous environment.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000829/pdfft?md5=bb75e341aac8647e8fc5f0915e2ae008&pid=1-s2.0-S2405665024000829-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141298143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of polyethylene microplastics on Brassica rapa: Toxicity mechanism investigation","authors":"Hao Wu,&nbsp;Beibei He,&nbsp;Bocheng Chen,&nbsp;An Liu","doi":"10.1016/j.emcon.2024.100380","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100380","url":null,"abstract":"<div><p>Polyethylene microplastics (PE-MPs) have toxicity to ecological environment, including animals and plants. This study investigated the toxicity of photodegraded PE-MPs on <em>Brassica rapa,</em> which is a typical model plant and only have around a 30-day life cycle. It is noted that the presence of photodegraded PE-MPs inhibited <em>Brassica rapa</em> growth since the stem length decreased by 11.94%–51.11 % while the fresh weight and dry weight decreased by 18.56%–27.46 % and 1.90 %–6.91 % respectively, compared to the blank group. PE-MPs receiving more light radiation became more hydrophobic. This inhibited PE-MPs entering the plant body along with the process of plant absorbing water. Furthermore, when PE-MPs were located in the lower soil layers, <em>Brassica rapa</em> reaching them needs a longer time, hence showing lower toxicity effect than the case of PE-MPs located in the upper soil layer. The research outcomes also indicated that malondialdehyde (MDA) contents in photodegraded PE-MPs exposure group increased by 1.37%–7.28 % while the catalase activity (CAT) increased by 60.11 %. This means that PE-MPs caused oxidative stress response in plants, inducing plants to resist external stress. Transcriptomic analysis results showed that <em>Brassica rapa</em>, which was affected by PE-MPs, significantly up-regulated genes related to the plant-pathogen interaction pathway while the ribosome pathway genes were significantly down-regulated. This led to a decrease in growth rate and a decrease in the homeostatic level of the ribosomal subunit and hence resulting in abnormal leaf vein development. These conclusions indicated the toxic effect and damage mechanism of photodegraded PE-MPs on <em>Brassica rapa</em>. The novelty of this study was to use both univariate analysis and transcriptomic analysis to investigate how photodegraded PE-MPs exert toxicity on <em>Brassica rapa.</em> The results can provide a theoretical basis for revealing the influence of MPs on plant growth.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000817/pdfft?md5=f14dc102a7fc756bb708a58df972368a&pid=1-s2.0-S2405665024000817-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141239066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Human biomonitoring of novel brominated flame retardants: A review on invasive and non-invasive biomarkers","authors":"Oluwatoyin M. Olagoke ,&nbsp;Temilola O. Oluseyi ,&nbsp;Kelechi L. Njoku ,&nbsp;Stuart Harrad ,&nbsp;Mohamed Abou-Elwafa Abdallah","doi":"10.1016/j.emcon.2024.100378","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100378","url":null,"abstract":"<div><p>Novel brominated flame retardants (NBFRs) are a group of chemicals applied mainly as alternatives to the phased-out polybrominated diphenyl ethers (PBDEs). However, toxicological studies show that NBFRs may pose health risks similar to PBDEs.The present study reviews available information on the biomonitoring of NBFRs and their metabolites in humans through invasive and non-invasive biomarkers, as well as the toxicological effects of these chemicals both <em>in vivo</em> and <em>in vitro</em>. In general, higher concentrations of NBFRs were reported in tissues of occupationally exposed adults from NBFR production facilities, e-waste recycling facilities and inhabitants living close to these areas, compared to the general population. It is worth noting that NBFR human biomonitoring data are limited to few countries located in North America, Europe and Asia, while data from developing countries are scarce. Evidence from <em>in vivo</em> and <em>in vitro</em> toxicity studies show that several NBFRs can cause adverse health effects through various modes of action, mainly: hormone disruption, genotoxicity, endocrine disruption, and behavioural changes. Although few studies have investigated the biotransformation of NBFRs in humans, evidence suggests that the toxicity of some NBFRs may be augmented through their metabolites, as in the case of 2,3,4,5- tetrabromobenzoic acid (TBBA), which may exhibit higher toxicity than its parent compound 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB). More research is required to assess toxicity thresholds, toxic endpoints, and tolerable intakes for various NBFRs, and their metabolites in human. Comprehensive epidemiological studies are highly recommended to further understand the risk arising from human exposure to different NBFRs, particularly in occupational settings.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000799/pdfft?md5=5e180b1a63e4fda588a7a143c0171eb9&pid=1-s2.0-S2405665024000799-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141303824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Suspect and non-targeted screening of chemical pollutants in Botswana's aquatic environments","authors":"Kgato P. Selwe ,&nbsp;Charlotte R. Head ,&nbsp;Gothatamang N. Phokedi ,&nbsp;Jens E.T. Andersen ,&nbsp;J. Brett Sallach ,&nbsp;Caroline E.H. Dessent","doi":"10.1016/j.emcon.2024.100377","DOIUrl":"10.1016/j.emcon.2024.100377","url":null,"abstract":"<div><p>Chemical pollution in the aquatic systems of Botswana has been sparsely studied despite its potential ecological importance. Here, we perform a study of water samples collected from 13 locations distributed across Botswana to obtain the first overview of the nature and distribution of chemical contaminants across the country's aquatic environment. High resolution mass spectrometry was applied using non-targeted and suspect screening methods to qualitatively analyse samples. A total of 114 contaminants of emerging concern (CECs) were identified including 68 (59.6 %) pharmaceuticals and pharmaceutical metabolites; 16 (14.2 %) pesticides; 13 (11.4 %) psychoactive compounds and metabolites; 11 (9.7 %) industrial chemicals and intermediates and lastly, 5 (4.4 %) personal care products. Allopurinol, 3,4-dimethylmethcathinone, and diazolidinyl urea represented the most commonly detected pharmaceutical, psychoactive drug and personal care product, respectively. The pesticide dodemorph and three industrial chemicals (stearamide, pthalic acid and bis(2-ethylhexyl) phthalate) were detected in all samples obtained. 90 CECs were detected in receiving water (from 7 sample locations), 75 in wastewater (from 3 sample locations) and 60 in surface water (from 9 sample locations). Of the compounds detected, only 8 had been identified in environmental samples acquired in Botswana previously. We discuss the variations in the nature and frequency of chemical pollutants detected in this work in a geographical context. The results indicate that Botswana's aquatic systems are subject to pollution, despite wastewater treatment and that in order to mitigate potentially harmful effects on both human and aquatic ecosystems, more investigations are required to correctly identify, track and tackle the sources of pollution.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000787/pdfft?md5=2dfd3d9d26fd7e3ad6e1bddc47db1b49&pid=1-s2.0-S2405665024000787-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141134492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The alarming link between neonicotinoid insecticides and kidney injury","authors":"Zhanpeng Zhang ,&nbsp;Longbin Shen ,&nbsp;Mei Chen ,&nbsp;Biao Huang ,&nbsp;Zhuoqi Wei ,&nbsp;Weiguo Xu ,&nbsp;Hua Zhang","doi":"10.1016/j.emcon.2024.100376","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100376","url":null,"abstract":"<div><p>Neonicotinoid insecticides (NEOs) have been extensively approved for application in agricultural production both in China and globally. Previous studies indicated that human exposure to NEOs would have adverse health effects. However, studies on occurrences of NEOs in kidney injury patients and their association with nephrotoxicity are limited. This study investigates the potential correlation between exposure to NEOs and kidney injury within a subset (<em>n</em> = 224) of the population residing in South China. Levels of 8 NEOs and 5 metabolites were quantified in blood samples obtained from both the 110 healthy and 114 kidney injury cohorts in South China. We found that target analytes were frequently detected in samples from the healthy and kidney injury cohorts (61%–100 %). Dinotefuran is the predominant NEO in the healthy (42.3 %) and kidney injury cohort (49.6 %). Significantly positive (<em>p</em> &lt; 0.05) associations between blood NEO concentrations and kidney injury were found, indicating that these pollutants may increase the odds of human kidney injury prevalence. Through multilinear regression analysis, it was observed that the concentrations of various NEOs exhibited a significant association (<em>p</em> &lt; 0.05) with hematological parameters linked to nephrotoxicity. Our study represents the pioneering investigation examining the relationships between NEOs and kidney injury, thereby offering novel insights into the nephrotoxicity associated with these pollutants. This discovery carries significant implications for public health policies and environmental conservation practices.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000775/pdfft?md5=0bcfca5e26870839a39b07faeab01d04&pid=1-s2.0-S2405665024000775-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141095320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occurrence of legacy and Emerging per- and polyfluoroalkyl substances (PFASs) in indoor dust from office environment in south china","authors":"Yao Cheng ,&nbsp;Yihan Hu ,&nbsp;Keman Yu ,&nbsp;Boning Zeng","doi":"10.1016/j.emcon.2024.100375","DOIUrl":"10.1016/j.emcon.2024.100375","url":null,"abstract":"<div><p>Per- and polyfluoroalkyl substances (PFASs) constitute a broad group of fluorinated organic chemicals that are widely used in consumer products and industrial applications due to their excellent physicochemical properties. Given that people spend a significant portion of their time in office environments, our understanding of the environmental presence and human exposure to these chemicals is crucial. In this study, we conducted a targeted analysis of 24 PFASs in office indoor environments. The ΣPFAS concentrations ranged from 51.6 to 219 ng/g with mean (±SE) and median concentrations of 114 (±5.75) and 107 ng/g, respectively. Hexafluoropropylene oxide dimer acid (HFPO-DA) was the most abundant emerging PFAS detected in the dust, with mean and median concentrations of 40.5 (±1.62) and 40.4 ng/g, respectively, comprising 34.2 % of the ΣPFAS concentrations. Notably, HFPO-DA exhibited a positive correlation with perfluorooctane sulfonate (PFOS) (r: 0.427, <em>p</em> &lt; 0.01), suggesting a potential common source for these two compounds. Our findings underscore the significant contribution of emerging PFASs to total PFAS concentrations and raise concerns about their chronic toxicity and potential health risks to humans in office indoor environments.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000763/pdfft?md5=3be1c0a5f095733108c74f78096b95df&pid=1-s2.0-S2405665024000763-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141139677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A systematic review of airborne microplastics emissions as emerging contaminants in outdoor and indoor air environments","authors":"Zahra Noorimotlagh ,&nbsp;Philip K. Hopke ,&nbsp;Seyyed Abbas Mirzaee","doi":"10.1016/j.emcon.2024.100372","DOIUrl":"10.1016/j.emcon.2024.100372","url":null,"abstract":"<div><p>Microplastics (MPs), the emerging contaminants of the present century, are potentially a major threat to human health and ecology. There is currently no comparison of the properties of MPs in indoor and outdoor air. Thus, there is a need a systematic review (SR). The goals of this study were to answer the following questions: (1) what are the geographical distribution, sources, abundances, and characteristics (polymer, type, shape, color, size) of MPs in outdoor and indoor air? (2) What are the limitations of the published studies and recommendations for future research? To achieve these objectives, four electronic databases were searched to find works published before December 31, 2022. In total, 37 publications were selected based on the PRISMA guidelines. The study found that polyester and polyethylene terephthalate were the most dominant polymer types in outdoor and indoor environments, respectively. The most important indoor sources for MPs included synthetic textiles, kitchen plastic utensils, synthetic fiber carpets, detergents, and furniture, while the most important sources for outdoor MPs include industrial emissions, particulate emissions from vehicles, burning of plastic waste, the expulsion of air bubbles and wave action in ocean and decomposition and destruction of plastic materials. Fibers were the dominant shape of airborne MPs in both environments. The predominant colors of the MPs in samples of the indoor air were white and transparent, whereas black was most abundant in the microplastic samples collected from the air outside the building. Finally, given the ubiquitous nature of MPs and their potential for adverse effects, governments should take effective measures to reduce the production of plastic materials and finally increase plastics reuse, and recycling rate.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000738/pdfft?md5=0d89ec921206cc6fa10e459436f2eee8&pid=1-s2.0-S2405665024000738-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141054072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of bisphenols in children's toy and baby products in the Middle East","authors":"K. Martínez-Guijarro ,&nbsp;B. Gevao ,&nbsp;M. Porcelli ,&nbsp;S. Al-Salem ,&nbsp;Saif Uddin ,&nbsp;M. Bahloul ,&nbsp;H. Taqi ,&nbsp;M. Hajeyah ,&nbsp;D. Krishnan ,&nbsp;S. Rajagopalan ,&nbsp;A. Boota","doi":"10.1016/j.emcon.2024.100374","DOIUrl":"10.1016/j.emcon.2024.100374","url":null,"abstract":"<div><p>A major concern from the scientific community has been raised since evidence of Bisphenol A (BP-A) can leach out from the products where they are incorporated as well as its endocrine disrupting effects observed in animals and humans. BP-A and several related chemicals such as Bisphenol AP (BP-AP), Bisphenol B (BP–B), Bisphenol S (BP–S), Bisphenol AF (BP-AF), Bisphenol (BP–P), Bisphenol Z (BP-Z) were analyzed in this study. BP-A and BP-S were the only bisphenols detected in the samples analyzed in this study. The median (range; mean) concentrations of BP-A found in this study was 321 ng/g (11–200932; 4893 ng/g). The analysis was carried out by sonicating 0.1 g of a cryo-milled sample aliquot in methanol followed by UPLC-MS/MS determination. High concentrations of BP-A were found in several products labeled as BP-A free such as nursing bottles which are particularly problematic from the children's exposure point of view. This study presents the first reliable bisphenols in children's toys and baby products commercialized in the Middle East. There is, however, a need to continue monitoring these compounds, especially in low-cost toys, and the so-called BP-A-free products, which appear to have high levels of target contaminants and can pose an exposure risk for infants and children in the region.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000751/pdfft?md5=234d5e94e1890d6e3c6d4b85d2308567&pid=1-s2.0-S2405665024000751-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141042455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intermittent electrical stimulation removes mixed antibiotics and associated antibiotic resistance genes at low temperatures","authors":"Chaoyue He ,&nbsp;Nuerla Ailijiang ,&nbsp;Zaimire Abdusalam ,&nbsp;Yincang Cui ,&nbsp;Na Li ,&nbsp;Mei Wu ,&nbsp;Hailiang Chen ,&nbsp;Yiming Zhang","doi":"10.1016/j.emcon.2024.100370","DOIUrl":"10.1016/j.emcon.2024.100370","url":null,"abstract":"<div><p>Biotechnology has limited effectiveness in terms of removing mixed antibiotics at low temperatures, leading to ecological risks arising from the presence of antibiotics in environmental waters. In this study, the removal of tetracycline (TCs) and sulfonamide (SAs) from antibiotic wastewater was improved by the intermittent electrical stimulation of anaerobic-aerobic-coupled upflow bioelectrochemical reactors (AO-UBERs) at low temperatures. The removal effects of oxytetracycline and tetracycline were 48.6 ± 3.5 % and 71.5 ± 2.9 %, respectively. Under 0.9V, the removal rates of oxytetracycline, tetracycline, and trimethoprim were significantly increased in both the aerobic-cathodic and anaerobic anodic chambers, with a more obvious increase at low temperatures. Compared with the blank control group, the removal efficiency of oxytetracycline, trimethoprim and tetracycline in the electric group was increased by 11.8 ± 2.5 %, 27.8 ± 10.5 % and 11.2 ± 5.8 %. The anaerobic chamber contributed more to the removal of TCs and trimethoprim than the aerobic chamber. Furthermore, electrical stimulation selectively enriched electroactive bacteria (<em>Methylophage</em> and <em>Pleuromonas</em>), drug-resistant bacteria (<em>Proteobacteria</em>), and nitrifying bacteria associated with biodegradation. The abundance of antibiotic-resistance genes is related to the distribution of potential hosts and mobile genetic elements (<em>sul1</em>), and electrical stimulation induces the enrichment of both. This suggests that while potentially effective for treating TCs- and SAs-containing wastewater at low temperatures, AO-UBERs may lead to the accumulation of antibiotic-resistance genes.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000714/pdfft?md5=f6683c1a94f2721be04ba92026728813&pid=1-s2.0-S2405665024000714-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141031864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}