Emerging Contaminants最新文献

{"title":"Diversity and functional genes of bacterial communities enriched from an estuarine sediment for degradation of polylactic acid microplastics","authors":"Saowaluk Krainara ,&nbsp;Ekawan Luepromchai ,&nbsp;Wantanasak Suksong ,&nbsp;Jira Kongpran ,&nbsp;Yin Nyein Myat ,&nbsp;Peerada Prommeenate ,&nbsp;Nichakorn Khondee ,&nbsp;Thinaporn Suttiviriya","doi":"10.1016/j.emcon.2025.100582","DOIUrl":"10.1016/j.emcon.2025.100582","url":null,"abstract":"<div><div>The accumulation of polylactic acid (PLA) microplastics (MPs) in estuaries presents significant environmental challenges. The potential biodegradation of PLA MPs was rarely studied in estuarine sediments from urban areas. This study examined PLA MPs biodegradation during enrichment and assessed microbial diversity and functional gene shifts between raw estuarine sediment (day 0) and enriched culture (day 60). The enriched culture at 60-day post-incubation reduced the 40 % weight of the initial 2 g L⁻¹ PLA MPs, accompanied by a decrease in the carbonyl peak at 1747 cm⁻¹, indicating oxidative polymer chain cleavage. In addition, the biodegradation process significantly altered microbial diversity and promoted key synergistic genera such as <em>Symbiobacterium</em>, <em>Sphingobacterium</em>, <em>Comamonas</em>, <em>Pseudomonas</em>, and <em>Alcaligenes</em> for cooperative PLA MPs biodegradation. Linear discriminant analysis scores highlighted the distinct differences in microbial profiles between the raw estuarine sediment and the enriched culture. In addition, functional genes including <em>pht2</em>, <em>tphA2</em>, putative chitinase, esterase, and lipase were enriched, which would facilitate biopolymer and phthalate degradation. These findings revealed how PLA MP exposure affected microbial carbon and nitrogen metabolism in estuarine sediment and uncovered synergistic bacterial taxa with biotechnological potential for sustainable plastic waste treatment.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100582"},"PeriodicalIF":6.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Global pharmaceutical pollution in waterways: Insights from sewage treatment point sources","authors":"Zarimah Mohd Hanafiah ,&nbsp;Wan Hanna Melini Wan Mohtar ,&nbsp;Khairul Nizam Abdul Maulud ,&nbsp;Wan Abd Al Qadr Imad Wan-Mohtar ,&nbsp;Mohamad Nazri Ebrahim ,&nbsp;Teh Sabariah Binti Abd Manan ,&nbsp;Antonius Indarto ,&nbsp;Haitham Abdulmohsin Afan ,&nbsp;Zaher Mundher Yaseen","doi":"10.1016/j.emcon.2025.100585","DOIUrl":"10.1016/j.emcon.2025.100585","url":null,"abstract":"<div><div>The global presence of pharmaceutical residues in sewage is a growing environmental concern, driven by human excretion, improper disposal, and industrial waste streams. This study synthesized data from meticulously selected 101 peer-reviewed publications to evaluate the occurrence of 20 pharmaceuticals in sewage influent and effluent as a primary point source of pollutants across diverse geographical regions, analyzed based on Asia, America, Europe, Africa and Australia. The highest cumulative concentrations of pharmaceuticals, particularly analgesics/anti-inflammatory drugs, were observed in North and South America, while most of the publications were dominantly published under the European region. Diclofenac, ibuprofen, sulfamethoxazole, and ciprofloxacin were the most frequently detected compounds and were found at high concentrations, exceeding 100,000 ng/L in the influent of some STPs. Ibuprofen and naproxen demonstrated high removal efficiencies, consistently exceeding 80 %, with no instances of negative removal observed. Atenolol, simvastatin, and valsartan exhibited substantial removal, though some STPs showed increased effluent concentrations. Contradictorily, diazepam, carbamazepine, azithromycin, and clindamycin demonstrated persistence through the conventional treatment processes, as evidently shown by the predominantly negative removal percentages. The occurrence of pharmaceuticals in sewage treatment plants (STPs) represents a significant global risk to both ecosystems and human health. Ecotoxicological risk assessments, based on hazard quotients (HQs) derived from the maximum measured concentrations, revealed heightened vulnerability among primary producers and consumers in aquatic environments, with higher trophic levels facing risks from bio-accumulative compounds. This pervasive micropollutant contamination emphasizes the critical need for improved wastewater treatment technologies, rigorous regulatory frameworks, and sustainable pharmaceutical disposal practices to minimize ecological impacts.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100585"},"PeriodicalIF":6.9,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145262253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Disruption of gluconeogenesis as a key mediator of male infertility in rats exposed to nanoplastics: In vivo evidence and molecular docking analysis","authors":"Sasanaqia Maulidah ,&nbsp;Febriyansyah Saputra ,&nbsp;Alfiah Hayati ,&nbsp;Mochammad Aqilah Herdiansyah ,&nbsp;Manikya Pramudya ,&nbsp;Firli Rahmah Primula Dewi ,&nbsp;Raden Joko Kuncoroningrat Susilo ,&nbsp;Vuanghao Lim ,&nbsp;Azzah Dyah Pramata","doi":"10.1016/j.emcon.2025.100581","DOIUrl":"10.1016/j.emcon.2025.100581","url":null,"abstract":"<div><div>Nanoplastics (NPs) have become widespread environmental pollutants with established toxicological impacts on several biological systems. This study investigates the impact of gluconeogenesis disruption in mediating infertility in rats exposed to polystyrene nanoplastics. Adult male rats were randomly assigned to five groups and orally administered NPs at concentrations of 0, 100, 200, 400, or 800 μg/kg body weight daily for 55 consecutive days to simulate subchronic exposure. NPs exposure induced excessive reactive oxygen species (ROS), which triggered upregulation of non-coding RNAs (TCONS_00074622 and TCONS_00083977), RNA methyltransferase DNMT2, activated intrinsic apoptosis via BAX, cytochrome <em>c</em> release, and elevated caspase-9 expression, impairing spermatogenesis and reducing sperm quality. Additionally, NPs exposure activated hepatic NF-κB signalling, increased serum pro-inflammatory cytokines (TNF-α, IL-1, IL-6), and caused hepatocellular damage, as demonstrated by increased serum AST and ALT levels. Insulin downregulation and altered expression of key gluconeogenic and glycogen metabolism genes (PCK1, G6PC1, GYS2, GLUT4, and PYGL). Molecular docking and dynamics revealed strong, stable binding of NPs to key metabolic proteins (G6PC1, GLUT4, PCK-1, and PYGL), supporting their involvement in metabolic dysregulation. Taken together, these findings provide significant in vivo and in silico evidence that disruption of hepatic gluconeogenesis serves as a central mediator of NP-induced male infertility.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100581"},"PeriodicalIF":6.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Per- and polyfluoroalkyl substances (PFASs) in crayfish (Procambarus clarkii) from Hubei Province, China: exposure, risk assessment and bioaccumulation","authors":"Yan Liu ,&nbsp;Zhenzhen Xia ,&nbsp;Qiao Wang ,&nbsp;Zhiyong Gong","doi":"10.1016/j.emcon.2025.100579","DOIUrl":"10.1016/j.emcon.2025.100579","url":null,"abstract":"<div><div>This study investigated the exposure levels of PFASs in crayfish sourced from Hubei Province, assessed the health and safety risks associated with consuming crayfish, and explored the bioaccumulation of PFASs in sediment affecting crayfish. The results showed that 10 types of PFASs were detected in all crayfish samples, with a detection rate of 100 %, and the concentration range of ∑PFASs was 0.90–2.67 μg/kg ww, with perfluorooctanoic acid (PFOA) and perfluorododecanoic acid (PFDoDA) being the most abundant compounds. In sediment samples, 8 types of PFASs were detected with a 100 % detection rate, and perfluorobutyric acid (PFBA) and perfluorooctanesulfonic acid (PFOS) were found to be the most abundant. The hazard index (HI) for PFASs in crayfish was significantly larger than 1, and Monte Carlo simulation results indicated that exposure to PFASs through consumption of the edible portions of crayfish may pose a significant risk to human health. Spearman correlation analysis revealed a significant correlation (p &lt; 0.01) between the concentrations of perfluorononanoic acid (PFNA), perfluorobutanesulfonic acid (PFBS), and PFOS in crayfish and their corresponding compounds in sediments. Additionally, the biological-sediment accumulation factor (BSAF) values for PFOA and PFNA exceeded 10, indicating a certain potential for bioaccumulation.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100579"},"PeriodicalIF":6.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel and legacy per- and poly-fluoroalkyl substances in major wastewater treatment plants within the Lake Victoria basin, East Africa","authors":"Ashirafu Miiro ,&nbsp;Edward Mubiru ,&nbsp;Oghenekaro Nelson Odume ,&nbsp;Silver Odongo ,&nbsp;George William Nyakairu ,&nbsp;Henry Matovu ,&nbsp;Charles Drago Kato ,&nbsp;Ivan Špánik ,&nbsp;Mika Sillanpää ,&nbsp;Douglas Sifuna ,&nbsp;Liudmyla Khvalbota ,&nbsp;Patrick Ssebugere","doi":"10.1016/j.emcon.2025.100580","DOIUrl":"10.1016/j.emcon.2025.100580","url":null,"abstract":"<div><div>Over the past two decades, rapid urbanization and industrialization in Uganda have generated wastewater containing emerging contaminants including per- and poly-fluoroalkyl substances (PFASs). This study assessed PFASs contamination of wastewater from Bugolobi (Kampala) and Kirinya (Jinja) wastewater treatment plants (WWTPs) by analyzing 80 influent and effluent samples for 15 PFASs using LC-MS/MS. We quantified 10 PFASs, with levels ranging from non-detectable (n.d) up to 372.4 ng/L (mean: 20.94 ± 0.42 ng/L). At Bugolobi WWTP, influent levels ranged from n.d to 190.01 ng/L (60.85 ± 1.03 ng/L) while effluents varied from n.d to 372.4 ng/L (237.91 ± 7.06 ng/L). At Kirinya WWTP, influent levels ranged from n.d to 29.37 ng/L (17.58 ± 3.54 ng/L) and effluents up to 30.21 ng/L (7.79 ± 0.85 ng/L). Short-chain PFASs (PFBS, PFBA) were more predominant, suggesting their possible use or degradation of the long-chain PFASs. Total mass loadings were higher at Bugolobi WWTP (5353.56 mg/day), serving the more densely populated Kampala, than at Kirinya WWTP (93.62 mg/day). PFSAs exhibited higher removal (72.45 % Bugolobi; 36.45 % Kirinya) than PFCAs (−127.38 % Bugolobi; −20.50 % Kirinya), which could be attributed to their stronger hydrophobic adsorption and partial biodegradation. Bugolobi, with ⁓82.59 % total removal outperformed Kirinya (∼25.19 %) due to its advanced conventional treatment. Ecological risk assessment revealed higher risks at lower trophic levels at Bugolobi compared to Kirinya, likely due to lower influx and partial mitigation by its pond-based system. These findings highlight the role of WWTPs as critical point sources of PFASs, posing ecological risks to aquatic ecosystems.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100580"},"PeriodicalIF":6.9,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interactions between antibiotic resistance genes and soil environmental factors: Coupling, antagonism, and synergism","authors":"Ling Wang ,&nbsp;Xuefan Gu ,&nbsp;Kunlong Hui ,&nbsp;Tingqiao Yu ,&nbsp;Ying Yuan ,&nbsp;Gang Chen ,&nbsp;Wenbing Tan","doi":"10.1016/j.emcon.2025.100578","DOIUrl":"10.1016/j.emcon.2025.100578","url":null,"abstract":"<div><div>The soil environment is crucial for maintaining the stability of ecosystems and the health of organisms. Due to the extensive use of antibiotics, antibiotic resistance genes (ARGs) have become pervasive soil contaminants. ARGs can spread through horizontal gene transfer mediated by mobile genetic elements and vertical transfer mediated by microbial proliferation, driving the expansion of resistant microbiota and novel variants of ARGs. Although ARGs have multifaceted impacts on soil properties, the dynamics, site-specificity, ecological complexity and heterogeneity of the soil environment obscure the underlying interaction mechanisms. This review systematically analyzes the sources, transmission pathways and environmental drivers of ARGs, and interprets their complex interactions with soil parameters. Interdependent factors such as soil pH, organic matter, moisture and microbial communities bidirectionally regulate ARGs distribution via physicochemical modulation and microbial community restructuring. Heavy metals promote the proliferation of ARGs via co-selection and oxidative stress mechanisms, in contrast to the antagonistic effects of enzymatic degradation on ARGs. Niche differentiation underlies the varied impacts of soil biota (fauna/flora) and soil physicochemical properties on ARGs, highlighting environment-dependent synergistic-antagonistic interactions. Based on this, we propose a remediation framework to address ARGs pollution. Priority research directions include: (1) spatiotemporal dynamics of the feedback loop between ARGs and the environment; (2) quantitative modeling of the coupling effects of multiple factors; (3) precision mitigation strategies targeting niche-specific transmission hotspots.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100578"},"PeriodicalIF":6.9,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of brominated flame retardants and polybrominated dibenzo-p-dioxins and dibenzofurans in eggs and contamination sources","authors":"Jindrich Petrlik ,&nbsp;Lee Bell ,&nbsp;Joseph DiGangi ,&nbsp;Aileen Lucero ,&nbsp;Gilbert Kuepouo ,&nbsp;Griffins Ochieng Ochola ,&nbsp;Nikola Jelinek ,&nbsp;Miroslava Jopkova ,&nbsp;Jana Pulkrabova ,&nbsp;Tomas Gramblicka ,&nbsp;Martin Skalsky ,&nbsp;Yuyun Ismawati ,&nbsp;Eric Akortia ,&nbsp;Sam Adu-Kumi ,&nbsp;Penchom Saetang ,&nbsp;Thitikorn Boontongmai ,&nbsp;Maria Carcamo ,&nbsp;Bjorn Beeler ,&nbsp;Peter Behnisch ,&nbsp;Christine Herold ,&nbsp;Roland Weber","doi":"10.1016/j.emcon.2025.100567","DOIUrl":"10.1016/j.emcon.2025.100567","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The data on the concentrations of brominated flame retardants (BFRs) and polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs) in eggs from free-range chickens were reviewed and compiled including assignment to major sources. The highest levels of polybrominated diphenyl ethers (PBDEs) and PBDD/Fs in pooled eggs from free-range chickens were detected at sites where e-waste was burned, near waste incineration, metallurgical facilities and at landfills/dumps. The PBDD/F pattern indicated that PBDEs and Tetrabromobisphenol A (TBBPA) are the major sources for PBDD/F contamination in the eggs. Dioxin bio-assays like the DR CALUX are useful to screen for total dioxin toxicity (PCDD/Fs, dl-PCB, PBDD/Fs and mixed polybrominated-polychlorinated dibenzo-p-dioxins/furans (PXDD/Fs)). The robust and cheap bioassay approach is currently the only method which also quantifies the dioxin-like toxicity of the complex group of PXDD/Fs where instrumental analysis cannot quantify the dioxin toxicity.&lt;/div&gt;&lt;div&gt;A major source of human exposure to BFRs is eggs from chickens that have pecked particles from e-waste plastics or other waste/products treated with BFRs. When chickens ingest plastic particles containing contaminants, the latter are transferred to their eggs. This is similar to what has been documented for sea birds. The BFRs listed as persistent organic pollutants (POP) with the highest level detected were PBDEs and hexabromocyclododecane (HBCDD). HBCDD is mainly contained in expanded and extruded polystyrene (EPS/XPS) which can be easily pecked by chickens. This was likely the reason for several HBCDD contaminated eggs above 1000 ng/g fat and up to 18,321 ng/g fat. EPS/XPS insulation which contain 90 % of all HBCDD formerly produced (∼640,000 tonnes in ∼42 million tonnes of EPS/XPS) is partly also used as insulation in henhouses and other parts of farms and private houses. Since chickens like to peck at and eat the soft polymer, this can be a relevant exposure source. A wide range of novel BFRs (nBFR) were detected in chicken eggs. The nBFR with the highest levels and frequency detected was 1,2-Bis(2,4,6-tribromophenoxy)ethane (BTBPE). BTBPE was often found in eggs in the monitoring of the International Pollutants Elimination Network (IPEN) with levels frequently above 10 ng/kg fat and three samples above 100 ng/g fat, up to 221 ng/g fat. DBDPE was also frequently detected in eggs with a maximum concentration of 2077 ng/g fat at the sites where plastic waste is used as fuel in boilers/incinerators. Also, hexabromobenzene (HBBz) was frequently detected in eggs above 0.1 ng/g fat with highest level of 30.3 ng HBBz/g fat.&lt;/div&gt;&lt;div&gt;Recommendations for controlling BFR and PBDD/F exposure of chicken and eggs are provided including the listing of PBDD/F and PXDD/F in the Stockholm Convention, the better control of plastic containing BFRs including the prohibition of exports of e-waste and plastic wastes to developing countries, better control and ","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100567"},"PeriodicalIF":6.9,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A critical review of the methods being proposed to solve the PFAS problem in drinking water: Are they practically applicable in real world?","authors":"Davyd Urbanas,&nbsp;Edita Baltrėnaitė-Gedienė","doi":"10.1016/j.emcon.2025.100563","DOIUrl":"10.1016/j.emcon.2025.100563","url":null,"abstract":"<div><div>Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are hardly degradable and persistent chemical compounds being detected all over the world and becoming more and more relevant while preparing drinking water. The existing techniques used for PFAS removal from water are effective, but they have a lot of limitations that hinder their wide and easy large-scale application. Up to date, a lot of newly designed methods have been suggested and investigated to remove PFAS from drinking water. However, although the achieved results of PFAS removal and/or decomposition efficiency are usually quite positive, a detailed analysis of experimental conditions is often required to evaluate the practical applicability of the proposed methods. Practical applicability is determined based on both technical possibilities and economic feasibility for large-scale applications. Today, the main focus of environmentally oriented scientific research should be directly related to real-world applications. Therefore, this article aims to provide a detailed review of the methods being proposed for PFAS removal from the applicability perspective and identify the main limitations hindering the wide exploitation of these PFAS removal techniques. This review article will help both scientists and engineers to focus on solving the most relevant problems that should be considered to make practical application possible. Some methods which are out of competition from both technological and economical point of view can be just rejected.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100563"},"PeriodicalIF":6.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HOCs bioavailability response to soil aging: Focusing on the indirect effects of aging conditions, environmental factors, and carrier-mediated changes in soil properties - A review","authors":"Xianxian Chen ,&nbsp;Qingsong Ji ,&nbsp;Jijie Kong ,&nbsp;Shaogui Yang ,&nbsp;Shiyin Li ,&nbsp;Limin Zhang ,&nbsp;Huan He","doi":"10.1016/j.emcon.2025.100566","DOIUrl":"10.1016/j.emcon.2025.100566","url":null,"abstract":"<div><div>The accumulation of hydrophobic organic contaminants (HOCs) in soil is a global problem, and the time-dependent interface behavior after entering the soil directly determines the HOCs bioavailability, which has attracted much attention. Despite a significant volume of reviews on the relationship between aging and HOCs residues in soil have been published in the past few decades, whereas a set of descriptive about the effects of aging on HOCs bioavailability are still lacking. We summarizes the occurrence concentration of typical HOCs in global soil and its aging mechanism in soil. Considering the importance of bioavailability, the influence of various factors (aging conditions, environmental factors, carriers, soil characteristics and pollutant properties) on the HOCs bioavailability and risk assessment were further analyzed. Among them, linking the alternations in soil properties mediated by external factors with the changes in the bioavailability of HOCs in soil over time is the main highlight. We suggest that future research should focus on: (1) the dynamic response of soil micro-interfaces to aging processes and their relationship with the variations of HOCs bioavailability during aging. (2) the differences in adsorption, desorption behavior and bioavailability of HOCs in soils between enhanced aging (freeze-thaw cycles and dry-wet cycles) and constant temperature and humidity aging, and between natural and artificial aging. (3) the effects of aging on the environmental behavior and bioavailability of HOCs in soils in the presence of multiple contaminants and environmental carriers (biochar and microplastics), especially the synchronous aging (carriers aging within the soil) rather than the pre-aging.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100566"},"PeriodicalIF":6.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibiotic resistance genes and microbial diversity in major aquaculture areas of Hainan Island","authors":"Xiaoyu Ren ,&nbsp;Yongqiang Qin ,&nbsp;Yankun Zhang ,&nbsp;Xiaoyu Li ,&nbsp;Yihou Tang ,&nbsp;Xiaoping Diao ,&nbsp;Yuyuan Lin ,&nbsp;Haoyu Qin","doi":"10.1016/j.emcon.2025.100562","DOIUrl":"10.1016/j.emcon.2025.100562","url":null,"abstract":"<div><div>This investigation aims to delineate the spatial distribution, prevalence, and diversity of antibiotic resistance genes (ARGs) within aquatic ecosystems across four coastal aquaculture zones in Hainan Province—Danzhou, Wanning, Wenchang, and Sanya. It further assesses the impact of environmental parameters on ARGs dissemination and microbial community structure. High-throughput sequencing was utilized to analyze water samples from 42 sampling sites, complemented by absolute quantitative PCR to quantify 144 ARGs variants. This approach elucidated correlations between ARGs and microbial assemblages, as well as the influence of environmental factors on these interactions. Results indicated that the number of ARGs detected per site ranged from 61 to 123, with Danzhou exhibiting 90 to 123, Wanning 74 to 123, Wenchang 68 to 122, and Sanya 61 to 109 ARGs. Notably, 16 sampling points harbored over 110 ARGs. Quantitative analysis revealed ARG concentrations ranging from 16,167 to 1,784,618 copies/ng. Co-occurrence network analysis demonstrated that most ARGs were associated with MGEs, 16S rRNA genes, transposons, and integrons, indicating these elements' critical role in horizontal gene transfer. Microbial community profiling identified 27,050 operational taxonomic units (OTUs) across 72 phyla, 153 classes, 371 orders, 459 families, and 924 genera, with <em>Proteobacteria</em>, <em>Bacteroidota</em>, <em>Actinobacteriota</em>, <em>Cyanobacteria</em>, and <em>Planctomycetota</em> as dominant taxa. Genus-level analysis revealed significant variations in the abundance of taxa such as <em>Cyanobium_PCC-6307</em>, <em>Candidatus_Actinomarina</em>, and <em>HIMB11</em> across sampling sites. Environmental parameters, including pH, dissolved oxygen (DO), specific conductance (SPC), salinity (SAL), temperature (T), and pressure (kPa), showed strong correlations with ARG distribution and microbial community composition. Region-specific co-linearity networks indicated distinct relationships between microbial taxa and ARGs; notably, Danzhou and Wanning exhibited strong correlations with over 20 ARGs per genus, whereas Wenchang displayed a more complex association pattern, suggesting a multifaceted role in ARG transmission pathways. Overall, the findings suggest that environmental factors and microbial hosts significantly influence ARG prevalence in Hainan's coastal waters, with regional variations in microbial-ARG interactions, particularly in Wenchang, indicating heightened transmission risks. This study offers vital insights for sustainable aquaculture practices and informs regional regulatory strategies for aquaculture management.</div></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"11 4","pages":"Article 100562"},"PeriodicalIF":6.9,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}