Environmental Research最新文献

{"title":"Behavior and Toxicity of Buckminsterfullerene (C₆₀) in Aquatic Environments: A 30-Year Review.","authors":"Xukai Lan, Wei Qian, Zuohong Chen, Hailong Zhou, Ciara Chun Chen, Xiaoshan Zhu","doi":"10.1016/j.envres.2026.125976","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125976","url":null,"abstract":"<p><p>Buckminsterfullerene (C₆₀) is widely applied in various fields due to its unique physicochemical properties and has been increasingly detected in aquatic environments. This review examines the current knowledge of C₆₀ behavior and toxicity in aquatic environments over the past 30 years. Once released into aquatic systems, C₆₀ undergoes complex processes, including dispersion, aggregation, sedimentation, transformation, and interactions with co-pollutants. These processes influence its mobility, bioavailability, and toxicity, affecting organisms from algae to benthos. Mechanisms for these toxicities involve solvent-related effects, reactive oxygen species generation, physical contact, and carrier effects with co-pollutants. Furthermore, current evidence suggests that the ecological risks of C₆₀ are likely underestimated, particularly in sediment-associated, food-web, and multi-pollutant exposure scenarios. This review also identifies critical knowledge gaps, including the fate of sediment-associated C₆₀, the limited diversity of test organisms, the lack of environmental realism in exposure conditions, and challenges in maintaining C₆₀ purity during preparation.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125976"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222942","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":"Adsorption behavior of nanoplastics from water onto magnetic biochar in single and binary heavy metal systems: A combined experimental and DFT study.","authors":"Yan Jiao, Xiaofei Xu, Tingting Liu, Chenguang Zhang, Xiuli Shen, Xincheng Chen, Jingpeng Zhou, Fuli Yang, Shaoqing Wang","doi":"10.1016/j.envres.2026.125982","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125982","url":null,"abstract":"<p><p>Coexisting metals can alter the removal of nanoplastics by magnetic biochar, but comparisons between single- and mixed-metal treatments depend on the concentrations used. We evaluated the apparent uptake of dispersed polystyrene (PS) nanoplastics by magnetic biochar (MBC) under metal-free, Pb(II), Zn(II), and binary Pb(II)/Zn(II) conditions. Each metal was added at 50 mg L^-1 in the corresponding treatment. At an initial PS concentration of 100 mg L^-1, the apparent uptake capacities were 24.25, 19.40, 14.48, and 21.14 mg g^-1, respectively. The binary value was numerically higher than either single-metal value but remained below the metal-free control. Because the binary treatment contained twice the total metal concentration of each single-metal treatment, the observed binary response reflects the combined influence of metal composition and total loading. Control measurements showed metal-associated changes in PS aggregation, while SEM-EDS and XPS analyses detected Pb and Zn on recovered MBC and indicated changes in the surface chemical environment. Selected finite-cluster calculations further illustrated configuration-dependent local metal arrangements and electronic redistribution at the modeled PS-MBC interface. Together, these results establish a treatment-dependent adsorption response under defined batch conditions and indicate that metal identity, total loading, and local interfacial configuration jointly influence dispersed PS removal.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125982"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222924","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":"Humin-accelerated microbial dechlorination of polychlorinated biphenyls in Taihu Lake sediment microcosms: Insights into congener and microbe shifts and the role of subsequently supplemented sulfidated nanoscale zero-valent iron.","authors":"Lei Xu, Xuexin Han, Yanqiang Tang, Ying Wang, Jiafeng Chen, Zhixing Xiao, Yan Xu","doi":"10.1016/j.envres.2026.125972","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125972","url":null,"abstract":"<p><p>Microbial dechlorination is a promising route for the in situ detoxification of PCB-contaminated sediments, yet this is often limited by slow electron transfer and the progressive depletion of electron donors. Humin acts as a naturally occurring solid-phase redox mediator, whereas sulfidated nanoscale zero-valent iron (S-nZVI) can provide extra electrons. Both of them hold the potential to enhance PCB dechlorination. Herein, this study investigated the long-term (66 weeks) effect of humin on dechlorinating the most toxic commercial PCB mixture Aroclor 1254 in Taihu Lake sediment microcosms. Moreover, the triggering potential via supplemented S-nZVI were examined after Week 30, when initial dechlorination slowed down. The results showed that humin significantly accelerated PCB dechlorination during the rapid phase (Weeks 12-30), without altering the predominant meta- and para-dechlorination preferences. Total PCB mass decreased by approximately 32% while toxic equivalents declined by >99% by Week 66. Congener-specific analysis inferred three predominant humin-enhanced meta-dechlorination pathways of PCB110 (236-34)→PCB71 (26-34)→PCB32 (26-4), PCB99 (245-24)→PCB47 (24-24), and PCB92 (235-25)→PCB52 (25-25). Microbial analyses by multiple molecular biology tools suggest that humin (20 g·kg^-1 slurry basis) was associated with closer co-occurrence between putative dechlorinating and supporting anaerobic populations. Dehalococcoides abundance increased from ∼10⁷ to ∼10⁸ copies·mL^-1, accompanied by pronounced increases in the reductive dehalogenase (RDase) genes pcbA4 and pcbA5, which reached 1.00×10⁸ ± 3.75×10⁵ and 4.81×10⁸ ± 2.04×10⁷ copies·mL^-1, respectively. Supplementation with 0.1% (slurry basis) S-nZVI at Week 30, triggered further dechlorination and total PCB mass decreased by 44% at the end of Week 66. S-nZVI drove apparent increases of Dehalococcoides, Dehalogenimonas, as well as iron- and sulfate-respiration species. Predicted functional changes further displayed a wide community response accompanying sustained PCB dechlorination. Combining humin-enhanced rapid-phase dechlorination with S-nZVI-supported further dechlorination after dechlorination slows may provide a viable strategy for sustaining long-term PCB bioremediation.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125972"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222848","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":"Moisture-induced pore restriction reveals a lower initial moisture window for aerobic composting of aquaculture-derived particulates.","authors":"Jiannan Li, Yanhao Deng, Yanling Yu, Weihua He, Yujie Feng","doi":"10.1016/j.envres.2026.125977","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125977","url":null,"abstract":"<p><p>Aerobic composting offers a sustainable route for recycling aquaculture-derived particulates, but appropriate moisture conditions for these fine and adhesive materials remain unclear because conventional criteria are mainly derived from terrestrial wastes. Aquaculture-derived particulates were composted for 28 d at initial moisture contents of 40%, 45%, and 50%. The 40% treatment maintained the highest porosity and more favorable oxygen conditions, entered the thermophilic phase (>50 °C) on day 8, and remained thermophilic for 13 d. In contrast, the 45% treatment sustained thermophilic conditions for only 6 d, whereas the 50% treatment never exceeded 50 °C and reached a minimum O₂ concentration of 5.3%. The 40% treatment achieved a 52.47% decrease in C/N ratio, a final germination index of 81.7 ± 6.3%, and an HA/FA ratio of 1.87 ± 0.06, indicating enhanced organic matter stabilization and humification. Higher moisture caused persistent oxygen limitation, prolonged NH₄⁺-N accumulation, ammonia loss, and increased greenhouse gas emissions. Microbial and metagenomic analysis were consistent with faster succession toward thermotolerant and aerobic degraders under 40% moisture, whereas higher moisture favored oxygen-limited metabolic potentials. Aquaculture-derived particulates also contained higher mucin-equivalent levels than the conventional substrates examined, suggesting that mucin may increase moisture-dependent adhesion and pore restriction. These findings demonstrate that aquaculture particulate-based composting requires a lower initial moisture level than commonly applied to conventional substrates, highlighting the importance of balancing water availability and pore aeration to improve compost stability and mitigate greenhouse gas emissions.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125977"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222862","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":"Enantiomer-specific effects of metconazole disrupt soil microbiota, gut homeostasis, and genomic responses of Eisenia fetida.","authors":"Linfa Fang, Haixia Zeng, Hailin Zhang, Weibing Liu, Wengao Shangguan, Minglin Huang, Shanshan Di, Xiaoxuan Su, Ran Xiao, Yue Deng","doi":"10.1016/j.envres.2026.125975","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125975","url":null,"abstract":"<p><p>The selective use of highly active, low-risk enantiomers in place of racemic fungicides represents a sustainable approach to balancing agricultural productivity with environmental safety. Little is known about the enantioselective toxicity and environmental disturbances of the chiral triazole fungicide metconazole (MEZ) on the soil ecosystem. This study revealed that rac-MEZ dissipated faster than cis-MEZs in soil, but rac-MEZ induced a greater decrease in bacterial diversity and network complexity. The longer persistence of cis-MEZs possibly led to greater bioaccumulation in earthworms (Eisenia fetida). Enantioselectivity was observed for two cis-MEZs; cis-1R,5S-MEZ exhibited more severe acute toxicity in earthworms than cis-1S,5R-MEZ. This may be attributed to the potential detoxifying protein (CYP4V), which binds weakly with cis-1R, 5S-MEZ. This weaker detoxification capacity potentially resulted in oxidative stress response system collapse in earthworms, leading to excess reactive oxygen species (ROS) accumulation and disturbance of antioxidant and detoxification enzymes (such as CAT, SOD, and GST). The ROS dysregulation caused by cis-1R, 5S-MEZ induced severe ecotoxicity, including DNA damage, heme metabolism disruption, and downregulation of transcriptional ovo-spermathecal apparatus development and genomic diversification, possibly resulting in higher ipotoxicity, genotoxicity, and reproductive toxicity. Therefore, cis-1R,5S-MEZ is more toxic to earthworms and their ecological functions, suggesting a less favorable environmental risk profile for potential agricultural use.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125975"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222866","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":"Association of Occupational Noise Exposure with Hypertension and the Mediating Role of Metabolic Dysregulation: A Combined Cross-Sectional and Longitudinal Study.","authors":"Xiaoru Dai, Peng Sun, Mingxian Fu, Lei Han, Lizhuang Xie, Yuan Zhao, Long Miao, Baoli Zhu, Boshen Wang","doi":"10.1016/j.envres.2026.125983","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125983","url":null,"abstract":"<p><strong>Background: </strong>Evidence linking occupational noise to hypertension remains inconsistent, and potential metabolic pathways are insufficiently characterised.</p><p><strong>Methods: </strong>We conducted a cross-sectional analysis of 70,759 workers in Jiangsu Province and a retrospective five-year cohort analysis of 2,188 workers. We combined multivariable regression, machine-learning prediction, mediation analysis, and longitudinal modelling to examine associations and potential pathways.</p><p><strong>Results: </strong>Hypertension prevalence was 28.19%. Compared with unexposed workers, noise exposure of 70-< 85 dB(A) and 85-< 90 dB(A) was associated with higher hypertension odds (OR = 1.16 and 1.21, p < 0.001), whereas the association at ≥ 90 dB(A) was not significant after adjustment. XGBoost achieved the best predictive performance (AUC=0.84), with metabolic indicators including triglycerides, glucose, and γ-glutamyl transferase ranking among the important predictors, while noise exposure also contributed to prediction. Mediation analyses identified potential indirect pathways involving γ-glutamyl transferase, glucose, and low-density lipoprotein cholesterol in the association between occupational noise exposure and systolic blood pressure. Longitudinal analyses showed delayed divergence in metabolic markers and larger systolic blood pressure differences during the later follow-up period.</p><p><strong>Conclusions: </strong>Occupational noise exposure was associated with elevated blood pressure even at levels below the Chinese occupational noise exposure limit of 85 dB(A) for an 8-hour working day, which is primarily intended to prevent noise-induced hearing loss. The findings are consistent with a potential role of oxidative stress-related glucose and lipid metabolic dysregulation in this association. Future occupational health strategies should incorporate longitudinal metabolic surveillance to mitigate noise-induced risks in exposed populations.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125983"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222883","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":"Waste sludge-derived humic acid alters metallic nanoparticle-bacteria interactions during denitrification via amide-mediated transformation and metabolic regulation.","authors":"Zhewei Ou, Yang Wu, Lijuan Wu, Chuanyue Fu, Buzhou Zhu, Jun Gao, Cong Huang, Xianda Chen, Xin He, Ying Xue, Chuanzhi Sun, Yinguang Chen, Xiong Zheng","doi":"10.1016/j.envres.2026.125927","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125927","url":null,"abstract":"<p><p>Silver nanoparticles (Ag NPs) are increasingly recognized to disrupt bacterial denitrification, a process responsible for over 70% of global nitrogen removal, yet cost-effective and sustainable mitigation strategies remain largely limited. This work systematically reveals the interactions between waste sludge-derived humic acid (WSHA) and Ag NPs, providing WSHA as a scalable alternative that achieves near-complete denitrification recovery (98.4% vs. 70.6% for natural analogs) through amide-mediated silver transformation and metabolic regulation. Structural characterization reveals WSHA's distinctive lower α-helix/(β-sheet + random coil) ratio (0.31 vs. 0.83 for natural analogs) exposes abundant amide groups that exhibit superior Ag NPs binding affinity (-6.53 eV vs. -5.41 eV for carboxyl groups). Notably, nitrogen atoms in amide groups serve as primary electron-donating centers (carrying -0.70 e), driving preferential Ag surfaces binding that promotes Ag NPs aggregation (from 10 to 50.8 nm) and surface oxidation to low-toxicity Ag₂O and Ag₂S species, thereby reducing bioavailable Ag⁺ release by 80%. Furthermore, transcriptomic analysis reveals a dual-protection mechanism beyond physicochemical transformation. WSHA simultaneously upregulates key denitrification enzymes (e.g., nitrate and nitrite reductases) and central carbon metabolism pathways (e.g., glycolysis and TCA cycle), while activating comprehensive stress-response systems (e.g., DNA replication, SOS response, and oxidative stress defense). This integrated physicochemical-biological protection establishes waste-derived humic substances as scalable, economically viable solutions for mitigating metallic nanoparticle contamination in both engineered and natural microbial ecosystems.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125927"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222896","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":"Interfacial electron transfer and surface dual-sites on Fe-Mn bimetallic catalyst for synergistic peroxymonosulfate activation and reactive oxygen species generation.","authors":"Jianhua Qu, Xuerui Liu, Xiangyu Jia, Ruiyong Feng, Juncheng Wang, Yiou Wang, Yilin Wang, Bo Cao, Ying Zhang","doi":"10.1016/j.envres.2026.125981","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125981","url":null,"abstract":"<p><p>The remediation of persistent chlorophenolic contaminants in aquatic environments remains a formidable challenge, necessitating the development of highly efficient and sustainable advanced oxidation technologies. Peroxymonosulfate-based advanced oxidation processes (PMS-AOPs) have been recognized as a significant approach, yet their catalytic performance is often limited by insufficient active sites, sluggish electron transfer kinetics, and poor catalyst stability. To overcome these limitations, a novel biochar-supported Fe-Mn bimetallic catalyst (Fe-Mn@BC) was rationally designed and synthesized as an efficient peroxymonosulfate (PMS) activator for the removal of 2,4,6-trichlorophenol (TCP). Under optimal parameters, the Fe-Mn@BC/PMS system realized complete TCP degradation within 150 min. Mechanism studies revealed that reactive oxygen species (ROSs), including , , , and , were the dominant active species responsible for TCP degradation. Characterization results and electrochemical analysis demonstrated that the synergistic Fe(II)/Fe(III) and Mn(II)/Mn(III)/Mn(IV) redox cycles not only facilitated electron transfer but also promoted O-O bond cleavage within the PMS molecule, thereby sustaining continuous ROSs generation. Furthermore, surface functional groups (e.g., C=O) on the catalyst contributed to ROSs formation via a non-radical pathway, further enhancing the oxidative capacity. This work provided a robust bimetallic catalyst system with enhanced PMS activation capability, offering an sustainable and effective solution for the treatment of chlorophenolic contaminants.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125981"},"PeriodicalIF":8.2,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222929","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":"Feasibility of self-sustaining smoldering for the preparation of constructed Technosols from acidic mine tailings.","authors":"Maohan Wang, Zhangqian Wu, Qun Zhao, Xuebo Chen, Songhao Wei, Songze Ma, Xiaoyu Wang, Jie Li, Hao Yang, Jianhong Huang, Xuewei Hu, Senlin Tian","doi":"10.1016/j.envres.2026.125973","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125973","url":null,"abstract":"<p><p>Self-sustaining smoldering has been widely investigated for treating organic solid waste, whereas its potential to transform acidic mine tailings into constructed Technosols (CTs) for rehabilitation remains unclear. Here, self-sustaining smoldering was evaluated as a method for preparing CTs from acidic mine tailings, with a focus on smoldering behavior, acid-generation potential, arsenic (As) risk, physicochemical properties, dissolved organic matter (DOM) characteristics, revegetation potential, and mineralogical transformation. At tailings/wheat straw ratios of 3:1-6:1 and airflow rates of 0.2-0.9 m³/h, smoldering was self-sustaining, increasing the net neutralization ratio from 1.65 to values in the range 3.06-6.32 and indicating a transition to nonacid-generating behavior. Smoldering increased pH and nutrient availability, with the contents of organic matter and available nitrogen, phosphorus, and potassium increased by 2.02-3.97, 1.29-3.56, 1.87-45.08, and 50.62-85.69 times their respective initial levels. Smoldering also promoted DOM humification; increased condensed aromatic and tannin-like compounds; depleted sulfur-containing DOM; induced pyrite depletion, goethite-to-hematite transformation, and kaolinite dehydroxylation; and increased surface roughness. Although total As concentrations decreased from 64.50 to 52.87-64.14 mg/kg and the optimal treatment met the relevant landscaping-soil limit, smoldering increased As bioavailability and leachability in several treatments, necessitating subsequent risk management. However, plant tests of the resulting loamy-sand CTs confirmed improved revegetation potential, with greater ryegrass germination, shoot growth, and dry biomass compared with untreated tailings, particularly under tailings/wheat straw ratios of 3:1. This study advances the application of smoldering and provides a low-cost and energy-efficient method for preparing CTs for widespread acidic mine-tailings rehabilitation.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125973"},"PeriodicalIF":8.2,"publicationDate":"2026-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149219781","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":"Dioxin-like contaminants (PCDD/Fs, PBDD/Fs, PXDD/Fs, PCBs, PCNs) & PBDEs in edible avian eggs other than chickens.","authors":"A R Fernandes, M Rose, F Smith, D Mortimer, I Lake","doi":"10.1016/j.envres.2026.125959","DOIUrl":"https://doi.org/10.1016/j.envres.2026.125959","url":null,"abstract":"<p><p>The occurrence of dioxin-like environmental contaminants, polybrominated diphenylethers (PBDEs) and polychlorinated biphenyls (PCBs) was investigated in eggs of eleven avian species excluding chickens. The majority were duck and quail eggs, but smaller numbers of goose, turkey, guinea-fowl, pheasant, pea-fowl, gull, ostrich, emu and rhea eggs from retail outlets were also analysed using high-resolution sector-field mass spectrometry. Polychlorinated/brominated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs, PBDD/Fs), PCBs and PBDEs were measured in 104 samples. Mixed halogenated dioxins, furans, biphenyls (PXDD/Fs & PXBs), and polychlorinated naphthalenes (PCNs) were investigated in ∼ 1/5^th of samples. These environmental contaminants were detected in all species at lipid weight maxima of 26 pg TEQ/g, 465 ng/g NDL-PCBs and 227 ng/g PBDEs. Except for PCDD/Fs and PBDD/Fs (detected in 90 % of samples), gull eggs showed highest contaminant levels. PBDD/F TEQ (max. 7.98 pg/g lipid) exceeded PCDD/F TEQ in 26% of duck eggs and elevated contaminant levels were recorded for other species. Different husbandry practices, access to soil and herbage under free-range conditions, seasonality and lower periodicity of egg laying may promote elevated contaminant levels. Dietary intakes of PCDD/F and PCB TEQ through consumption of duck eggs ranged from 0.04 to 0.44 pg TEQ/kg bw/week for adult consumers, and approximately doubled (0.08 - 0.94 pg TEQ/kg bw/week) when all measured DL-TEQ was included. Indicative intakes from eggs of other species were considerably higher, with corresponding values ranging from 0.44 - 5.3 and 0.51 to 6.2 pg TEQ/kg bw/week, respectively. Uniquely, the study provides baseline levels of emerging environmental contaminant occurrence and dietary exposure through eggs of hitherto unstudied avian species. The results emphasise the significance of non-regulated TEQ inputs. The doubling of TEQ intake through duck egg consumption when these emerging contaminants are included, suggests that the current limited focus on chlorinated congeners may provide an inadequate reflection of dietary exposure.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"125959"},"PeriodicalIF":8.2,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214889","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}