IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-22 DOI: 10.1016/j.chemosphere.2025.144419

Mansour Zeynali , Vahid Yavari , Vahid Morshedi , Ahmad Ghasemi , Preeta Kochanian , Anna Karapetyan , Mansour Torfi Mozanzadeh

A 10-day study was carried out to examine the effects of polyethylene microplastics (PEMP) on growth, antioxidant capacity, stress-related genes transcription, and gut histology of Asian seabass (Lates calcarifer) (Bloch, 1970) larvae. In this regard, 2 day old post hatch larvae were exposed to four concentrations of PEMP, including 1) control (without PEMP addition), 2) PEMP50 (50 μg PEMP/L), 3) PEMP100 (100 μg PEMP/L) and 4) PEMP500 (500 μg PEMP/L). Two days post hatching larvae (mouth opening time) were distributed into twelve 120-L cylindrical polyethylene tanks, each filled with 100 L seawater (47.0 ± 0.5 g/L, 32 ± 0.8 °C) (2500 larvae in each tank, 25 larvae/L). Different dosages of the PEMP were diluted in ethanol, then added to the larviculture tanks and larvae were exposed to each treatment for 10 days. Each treatment was replicated in three tanks. Rotifers (Brachionus plicatilis small type, 5–10 animals/mL) were offered to larvae from second DPH to 10 DPH in a green water (0.1-0.3 × 10⁶ cell/ml Nannochloropsis. sp) system. The highest and lowest survival rate were in control (28.50 ± 3.38 %) and PEMP500 (3.50 ± 0.12 %) groups, respectively (P < 0.05). The highest body weight was in the control (1.94 ± 0.06 mg) but the lowest body weights were in PEMP100 (1.42 ± 0.03 mg) and PEMP500 (1.35 ± 0.03 mg) groups, respectively. The highest and lowest catalase (CAT) activities were in control and PEMP500 groups, respectively (P < 0.05). Superoxide dismutase (SOD) and glutathione reductase activities decreased with increasing PEMP dosages, meanwhile lipid peroxidation level increased. At day 10, the expression of interleukin-1β, heat shock protein 90, CAT, SOD and glutathione S transferase genes were down-regulated with increasing PEMP in water. The thickness of the gut wall, crypt depth, villus width and height significantly decreased in larvae exposed to PEMP100 and PEMP500 groups compared to the other treatments. Based on the results of the present study, increasing PEMP concentrations in water exert adverse lethal effects during the critical larval development in marine fish species.

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引用次数: 0

Assessment of the presence and risk associated with volatile and semi-volatile organic compounds in urban areas close to petrochemical parks

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-22 DOI: 10.1016/j.chemosphere.2025.144432

Reyes García-Garcinuño, Laura Solé-Domènech, Rosa M. Marcé, Laura Vallecillos, Francesc Borrull

This study monitored volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs) in urban areas near petrochemical industries using passive sampling. Sampling at six urban sites was conducted throughout 2023, with VOCs sampled every 14 days and SVOCs every 2 months, resulting in a total of 180 samples. VOCs and SVOCs were determined by gas chromatography-mass spectrometry, coupled to thermal desorption in the case of VOCs and after pressurised liquid extraction in the case of SVOCs. Alkanes were the VOCs found at the highest concentrations, with average concentrations between 11.6 μg m⁻³ to 30.5 μg m⁻³. Particular attention was focused on benzene and 1,3-butadiene due to their carcinogenic nature and their involvement in the local industrial activities. Despite some concentration peaks, the average values of these compounds were always below the limits set by current air quality regulations, with maximum values of 1.70 μg m⁻³ for both benzene and 1,3-butadiene. The phthalate ester family stood out among the SVOCs, with average concentrations ranging from 28.1 ng m⁻³ to 41.8 ng m⁻³. The average values of benzo(a)pyrene were always below the 1 ng m⁻³ limit established in air quality regulations for PM₁₀.

The risk assessment results showed that the total non-carcinogenic risk ranged from 0.02 to 1.30, with two VOCs, benzene and 1,3-butadiene, contributing the most to the risk. The total carcinogenic risk was between 1.5E-06 and 1.3E-04, with 1,3-butadiene (VOC) being the most significant contributor, accounting for between 18 % and 50 % of the overall risk. Phthalate esters (SVOCs) also made a substantial contribution, representing between 10 % and 39 % of the total risk.

本研究采用被动采样法监测石化工业附近城市地区的挥发性有机化合物 (VOC) 和半挥发性有机化合物 (SVOC)。2023 年全年在六个城市地点进行了采样，每 14 天采样一次 VOC，每 2 个月采样一次 SVOC，共采样 180 次。VOC 和 SVOC 采用气相色谱-质谱法测定，VOC 采用热解吸附法，SVOC 采用加压液体萃取法。烷烃是浓度最高的挥发性有机化合物，平均浓度在 11.6 μg m-3 至 30.5 μg m-3 之间。由于苯和 1,3-丁二烯具有致癌性，而且与当地的工业活动有关，因此受到特别关注。尽管存在一些浓度峰值，但这些化合物的平均值始终低于现行空气质量法规规定的限值，苯和 1,3-丁二烯的最大值均为 1.70 μg m-3。邻苯二甲酸酯家族在 SVOC 中表现突出，其平均浓度介于 28.1 纳克 m-3 和 41.8 纳克 m-3 之间。风险评估结果显示，非致癌总风险介于 0.02 至 1.30 之间，其中苯和 1,3-丁二烯这两种挥发性有机化合物的风险最大。总致癌风险介于 1.5E-06 和 1.3E-04 之间，其中 1,3-丁二烯（挥发性有机化合物）的致癌风险最大，占总风险的 18% 到 50%。邻苯二甲酸酯（SVOC）也有很大影响，占总风险的 10 % 到 39 %。

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引用次数: 0

Lab-on-a chip electrochemical sensing platform for simultaneous, ultra-sensitive and on-spot detection of 4-aminosalicylic acid and 5-aminosalicylic acid based on synergistic potential of chitosan functionalized MWCNTs supported on Ni doped Bi2S3

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-22 DOI: 10.1016/j.chemosphere.2025.144425

Darshana Chatterjee , S. Ravi P. Silva , Ida Tiwari

Mesalamine or 5-aminosalicylic acid (5-ASA) and its isomer 4-aminosalicylic acid (4-ASA), well known key therapeutic agents used to treat inflammatory bowel diseases (IBDs) can pose toxicity risks upon unregulated consumption. However, their simultaneous real-time detection from physiological fluids like urine remains unexplored. This study presents an innovative electrochemical sensing platform using modified screen-printed electrodes capable of simultaneous detection of both the drugs by harnessing the synergistic potential of a novel nanocomposite comprising chitosan functionalized multi-walled carbon nanotubes and nickel doped bismuth sulphide. Comprehensive optical and microstructural characterization validate the modified sensor platform's morphological characteristics. The sensor was evaluated using CV and DPV, exhibiting notably low detection limits which is of the value 39.559 μM for 5-ASA and 85.21 μM for 4-ASA. Sensitivity was found to be 0.174 μA μM⁻¹cm⁻² for the linear dynamic range (LDR) of 50 μM–5750 μM for 5-ASA and 0.139 μA μM⁻¹cm⁻² for the linear dynamic range (LDR) of 100 μM–2200 μM for 4-ASA. Moreover, the adaptability of the sensor for integration into hand-held point-of-care devices for practical application has been demonstrated in this paper. Experimental validation using real urine samples underscores the sensor's impressive recovery rate of 98–99.6 % for 5-ASA and 95.12–99.24 % for 4-ASA and its capability of detecting target drugs even when present with typical urinary constituents as interferences. The real-world applicability of this sensing platform is further emphasized by conducting experiments on miniaturized hand-held device thus making it a promising tool for on-the-spot detection, offering substantial potential for future integration into point-of-care diagnostic devices to monitor patients requiring precise medical monitoring. Our approach offers unprecedented real-time identification capabilities of 4-ASA and 5-ASA which has not been explored before.

中沙胺或 5- 氨基水杨酸 (5-ASA) 及其异构体 4- 氨基水杨酸 (4-ASA)是众所周知的治疗炎症性肠病 (IBD) 的主要药物，在不规范使用的情况下会产生毒性风险。然而，从尿液等生理液体中对其进行同步实时检测仍是一个未知数。本研究介绍了一种创新的电化学传感平台，该平台采用改性丝网印刷电极，能够同时检测这两种药物，利用了由壳聚糖功能化多壁碳纳米管和掺杂镍的硫化铋组成的新型纳米复合材料的协同潜力。全面的光学和微结构表征验证了改良传感器平台的形态特征。使用 CV 和 DPV 对传感器进行了评估，结果表明该传感器的检测限很低，5-ASA 为 39.559 μM，4-ASA 为 85.21 μM。在 50 μM-5750 μM 的线性动态范围内，5-ASA 的灵敏度为 0.174 μA μM-1cm-2；在 100 μM-2200 μM 的线性动态范围内，4-ASA 的灵敏度为 0.139 μA μM-1cm-2。此外，本文还证明了该传感器可集成到手持式护理点设备中进行实际应用。使用真实尿液样本进行的实验验证表明，该传感器对 5-ASA 和 4-ASA 的回收率分别为 98%-99.6% 和 95.12%-99.24%，令人印象深刻。通过在微型手持设备上进行实验，进一步强调了这一传感平台在现实世界中的适用性，从而使其成为一种很有前途的现场检测工具，为将来集成到护理点诊断设备中以监测需要精确医疗监测的病人提供了巨大的潜力。我们的方法提供了前所未有的 4-ASA 和 5-ASA 实时识别能力，这在以前还没有过。

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引用次数: 0

Effects of polystyrene microplastics on mice cardiac tissue structure: Protective role of resveratrol 聚苯乙烯微塑料对小鼠心脏组织结构的影响白藜芦醇的保护作用

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-21 DOI: 10.1016/j.chemosphere.2025.144406

Somaye Zangene , Samaneh Goorani , Hassan Morovvati , Hojat Anbara

Microplastics, as ubiquitous environmental particles, can influence cardiac function both directly and indirectly. We examined the beneficial effects of resveratrol on the cardiotoxicity induced by 2-μm polystyrene microplastics in murine models. Male NMRI mice (n = 27) Control, PS-MPs (1 mg/kg), and PS-MPs + RV (1 mg/kg PS-MPs+2.5 mg/kg RV) were randomly grouped into three. Histological and antioxidant parameters were assessed after 90 days of exposure. Our findings indicated that PS-MPs induce toxicity via oxidative stress, catalase (CAT), Total antioxidant capacity, superoxide dismutase (SOD), and a reduction in glutathione (GSH) levels, while concentrations of malondialdehyde (MDA) increased relative to controls. We also found that cardiac abnormality in PS-MPs treated mice was accompanied by reduced antioxidant capacity, elevated oxidative stress, and elevated apoptotic signaling. Nevertheless, the protective effects of RV against disruptions in endoplasmic reticulum stress and antioxidant profiles resulting from PS-MPs exposure were evident, as RV normalized HSP40, HSP25, and HSP70 levels and enhanced antioxidant defenses. This implies that RV is a promising protective agent against toxicity induced by environmental contaminants such as microplastics.

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引用次数: 0

Heavy metal contamination in fish and human health risks from lakes of a mega inter-basin water diversion

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-21 DOI: 10.1016/j.chemosphere.2025.144407

Wenxia Fan , Wentong Xia , Lian-Shin Lin , Han Liu , Xiao Qu , Wei Xin , Lizhou Tang , Yushun Chen

Heavy metals in freshwater lakes under inter-basin water diversions may pose harms to lake ecosystems and human health but have rarely been studied. We studied fish heavy metals in water diversion lakes, Gao-Bao-Shaobo Lakes (GBSLs), along the South-to-North Water Diversion Project in China, and evaluated associated human health risks from fish consumption. A total of 322 muscle samples from 29 fish species were collected to characterize contamination patterns of copper (Cu), chromium (Cr), cadmium (Cd), lead (Pb), and arsenic (As). The studied heavy metals in fish were found within China's food safety standards. Among the studied metals, Cu, Cd, Pb, and As had higher concentrations temporally in autumn and spatially in Gaoyou Lake. Moreover, Cd, Pb, and As in carnivores were significantly higher than other feeding groups, and Cd and As in upper-middle and upper water layers were significantly higher than other layers. Consumption of GBSLs fish did not pose a non-carcinogenic risk to human health. However, consumption of fish species such as Protosalanx hyalocranius, Carassius auratus, Culter alburnus may pose potential carcinogenic risks to human health due to Cr and Cd. The current study had implications for assessing aquatic ecological conditions and reducing human dietary health risks related to heavy metals in water diversion lakes.

跨流域调水条件下淡水湖泊中的重金属可能会对湖泊生态系统和人类健康造成危害，但这方面的研究却很少。我们研究了中国南水北调中线工程沿线引水湖泊--高宝-邵伯湖（GBSLs）中的鱼类重金属，并评估了食用鱼类对人类健康造成的相关风险。共采集了 29 种鱼类的 322 份肌肉样本，以确定铜 (Cu)、铬 (Cr)、镉 (Cd)、铅 (Pb) 和砷 (As) 的污染模式。所研究的鱼类重金属含量均符合中国食品安全标准。在所研究的重金属中，铜、镉、铅和砷在高邮湖秋季的时间浓度和空间浓度均较高。此外，肉食动物体内的镉、铅和砷含量明显高于其他摄食群体，中上层和上层水体的镉和砷含量明显高于其他水体。食用 GBSLs 鱼类不会对人类健康造成非致癌风险。然而，食用Protosalanx hyalocranius、Carassius auratus和Culter alburnus等鱼类物种可能因铬和镉而对人类健康构成潜在的致癌风险。目前的研究对评估引水湖泊的水生生态条件和降低与重金属有关的人类膳食健康风险具有重要意义。

{"title":"Heavy metal contamination in fish and human health risks from lakes of a mega inter-basin water diversion","authors":"Wenxia Fan , Wentong Xia , Lian-Shin Lin , Han Liu , Xiao Qu , Wei Xin , Lizhou Tang , Yushun Chen","doi":"10.1016/j.chemosphere.2025.144407","DOIUrl":"10.1016/j.chemosphere.2025.144407","url":null,"abstract":"<div><div>Heavy metals in freshwater lakes under inter-basin water diversions may pose harms to lake ecosystems and human health but have rarely been studied. We studied fish heavy metals in water diversion lakes, Gao-Bao-Shaobo Lakes (GBSLs), along the South-to-North Water Diversion Project in China, and evaluated associated human health risks from fish consumption. A total of 322 muscle samples from 29 fish species were collected to characterize contamination patterns of copper (Cu), chromium (Cr), cadmium (Cd), lead (Pb), and arsenic (As). The studied heavy metals in fish were found within China's food safety standards. Among the studied metals, Cu, Cd, Pb, and As had higher concentrations temporally in autumn and spatially in Gaoyou Lake. Moreover, Cd, Pb, and As in carnivores were significantly higher than other feeding groups, and Cd and As in upper-middle and upper water layers were significantly higher than other layers. Consumption of GBSLs fish did not pose a non-carcinogenic risk to human health. However, consumption of fish species such as <em>Protosalanx hyalocranius, Carassius auratus, Culter alburnus</em> may pose potential carcinogenic risks to human health due to Cr and Cd. The current study had implications for assessing aquatic ecological conditions and reducing human dietary health risks related to heavy metals in water diversion lakes.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"379 ","pages":"Article 144407"},"PeriodicalIF":8.1,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143851915","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}

引用次数: 0

Investigation of alternative materials for BOF slag in landfill biogeochemical cover for carbon dioxide sequestration

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-21 DOI: 10.1016/j.chemosphere.2025.144426

Gaurav Verma, Krishna R. Reddy

Landfill gas (LFG), primarily composed of methane (CH₄) and carbon dioxide (CO₂), continues to escape from municipal solid waste (MSW) landfills despite mitigation strategies like gas collection systems and soil covers. A novel biogeochemical cover (BGCC), developed at the University of Illinois Chicago, aims to mitigate these fugitive emissions by incorporating a biochar-amended soil (BAS) layer for CH₄ oxidation and a basic oxygen furnace (BOF) slag layer for CO₂ sequestration. However, the limited availability of BOF slag near landfill sites presents a barrier to large-scale implementation, necessitating the identification of alternative CO₂-sequestering materials. This study evaluates four alkaline industrial wastes - concrete waste fines (CWF), class C fly ash (CCFA), grade 100 slag cement (SC), and cement kiln dust (CKD) - as potential substitutes for BOF slag. Batch experiments revealed that CKD exhibited the highest CO₂ sequestration capacity (225.1 mg/g), followed by CCFA (135.8 mg/g), SC (126.7 mg/g), and BOF slag (98.1 mg/g), with CWF demonstrating the lowest (66.4 mg/g). Column tests under continuous LFG flow further confirmed CKD's superior performance (134.1 mg/g), compared to BOF slag (55.8 mg/g) and CWF (51.8 mg/g). Although CKD demonstrated higher carbonation potential, its lower hydraulic conductivity suggests the need for alternative integration approaches in the BGCC system, such as CKD-amended sand, barrier soil, topsoil, or use as a standalone layer. These findings demonstrate the potential of waste-derived materials to enhance the environmental performance and scalability of BGCC systems, contributing to sustainable waste management and greenhouse gas mitigation through improved CO₂ sequestration.

垃圾填埋气（LFG）主要由甲烷（CH4）和二氧化碳（CO2）组成，尽管采取了气体收集系统和土壤覆盖等缓解策略，但城市固体废物（MSW）垃圾填埋场的气体仍在不断逸散。伊利诺伊大学芝加哥分校开发的新型生物地球化学覆盖层（BGCC）旨在通过加入生物炭改良土壤（BAS）层来氧化 CH4，并加入碱性氧气炉（BOF）炉渣层来封存二氧化碳，从而减少这些逃逸性排放。然而，垃圾填埋场附近的碱性氧气炉炉渣供应有限，这对大规模实施造成了障碍，因此有必要寻找其他二氧化碳封存材料。本研究评估了四种碱性工业废料--混凝土废渣 (CWF)、C 级粉煤灰 (CCFA)、100 级矿渣水泥 (SC) 和水泥窑粉尘 (CKD)--作为生物碱炉渣的潜在替代品。批量实验显示，CKD 的二氧化碳螯合能力最高（225.1 毫克/克），其次是 CCFA（135.8 毫克/克）、SC（126.7 毫克/克）和京东方炉渣（98.1 毫克/克），而 CWF 的螯合能力最低（66.4 毫克/克）。在连续液化天然气流下进行的柱测试进一步证实了 CKD 的卓越性能（134.1 mg/g），而 BOF 炉渣（55.8 mg/g）和 CWF（51.8 mg/g）则无法与之相比。虽然 CKD 显示出更高的碳化潜力，但其较低的水导率表明，需要在 BGCC 系统中采用其他整合方法，例如 CKD 改良砂、隔离土、表土或作为独立层使用。这些研究结果表明，废物衍生材料具有提高 BGCC 系统的环境性能和可扩展性的潜力，有助于可持续废物管理和通过改进二氧化碳封存来减缓温室气体排放。

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引用次数: 0

Naturally occurring environmental PFAS mixtures induce significant oxidative damage and nuclei fragmentation in Dendrobaena veneta

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-21 DOI: 10.1016/j.chemosphere.2025.144413

Edoardo Pietropoli , Sophia Schumann , Alessandra Moressa , Federica Gallocchio , Gloria Zonta , Gianfranco Santovito , Paola Irato

Among persistent pollutants, perfluoroalkyl substances (PFAS) have garnered significant attention due to their ubiquitous presence in the environment and their established toxicity to humans. While numerous studies have investigated the impact of PFAS on various wildlife species, there remains a critical need to understand the specific responses of key bioindicator species. This study focuses on the earthworm Dendrobaena veneta as a crucial soil toxicity bioindicator to assess the potential toxicity of environmentally relevant PFAS mixtures. Earthworms were chronically exposed for 30 days to three PFAS mixtures at concentrations ranging from ng L⁻¹. Genetic damage was evident in coelomocytes, with a 50 % reduction in healthy nuclei. Evaluation of the reactive oxygen species (ROS) content revealed the mitochondria as the primary site of impact of PFAS. ROS production was higher in all PFAS-exposed groups. Antioxidant capacity was significantly impaired following PFAS exposure, indicating an ongoing response in exposed organisms. Furthermore, given the scavenger power against ROS, the content and gene expression of metallothioneins (MTs) were evaluated. The results reported a dose-dependent increase in expression levels at least 10 times higher under PFAS exposure. A similar trend was observed for the content of MTs, which increased in the three experimental groups 2-fold, 4-fold, and 6-fold, respectively.

在持久性污染物中，全氟烷基物质（PFAS）因其在环境中的普遍存在及其对人类的毒性而备受关注。虽然已有大量研究调查了 PFAS 对各种野生生物物种的影响，但仍亟需了解关键生物指标物种的具体反应。本研究将蚯蚓 Dendrobaena veneta 作为重要的土壤毒性生物指标，以评估与环境相关的全氟辛烷磺酸混合物的潜在毒性。蚯蚓长期暴露于三种全氟辛烷磺酸混合物（浓度为纳克/升-1）中 30 天。蚯蚓腹腔细胞的基因明显受损，健康细胞核减少了 50%。对活性氧（ROS）含量的评估显示，线粒体是受全氟辛烷磺酸影响的主要部位。在所有接触过 PFAS 的组别中，ROS 的产生量都较高。接触 PFAS 后，抗氧化能力明显减弱，这表明接触 PFAS 的生物体内存在持续反应。此外，考虑到金属硫蛋白（MTs）对 ROS 的清除能力，还对其含量和基因表达进行了评估。结果表明，在暴露于全氟辛烷磺酸的情况下，其表达水平呈剂量依赖性增长，至少高出 10 倍。MTs 的含量也呈类似趋势，在三个实验组中分别增加了 2 倍、4 倍和 6 倍。

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引用次数: 0

Analysis of 6PPD-Q in finfish, shellfish, and marine mammal tissues

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-19 DOI: 10.1016/j.chemosphere.2025.144418

Li-Jung Kuo , Jacob Tietsort , Jennie L. Bolton , Jonelle B. Gates , Mariko Langness , Andrea Carey , Sandra O'Neill , Irvin R. Schultz

6PPD-quinone (6PPD-Q), a transformation product of tire rubber anti-oxidant 6PPD, has been identified as the primary causal toxicant for the urban runoff mortality syndrome observed in coho salmon (Oncorhynchus kisutch) in the Pacific Northwest, USA. Several other fish species are also vulnerable to 6PPD-Q. However, monitoring efforts on 6PPD-Q have been focused on water, particulate matter, soils, and sediments, while that in tissues remains scarce. This study presents a workflow for extraction and quantitative analysis of 6PPD-Q in complex tissues from shellfish, finfish, and marine mammals. A multi-residue extraction protocol was developed for quantitative analysis of 6PPD-Q and persistent organic pollutants (PCBs, PBDEs, organochlorine pesticides) and PAHs in tissues in a single extraction. A GC-MS/MS based 6PPD-Q measurement was also developed. The protocol was evaluated in tissues including fish fillets, whole fish homogenates, mussels, and whale blubber. Limits of quantification of 6PPD-Q were between 0.03 and 0.12 ng/g ww and the surrogate (6PPD-Q-d5) recoveries were ∼60–100 % among matrices. We also conducted an initial biomonitoring study using caged mussels (Mytilus trossulus) and juvenile Chinook salmon (Oncorhynchus tshawytscha) from Puget Sound, WA. 6PPD-Q detection rates were at least 50 % but the concentrations were mostly <1 ng/g ww. Our protocol will aid 6PPD-Q biomonitoring in aquatic environments and also exposure assessments for improved understanding of 6PPD-Q bioaccumulation potential in these food webs.

{"title":"Analysis of 6PPD-Q in finfish, shellfish, and marine mammal tissues","authors":"Li-Jung Kuo , Jacob Tietsort , Jennie L. Bolton , Jonelle B. Gates , Mariko Langness , Andrea Carey , Sandra O'Neill , Irvin R. Schultz","doi":"10.1016/j.chemosphere.2025.144418","DOIUrl":"10.1016/j.chemosphere.2025.144418","url":null,"abstract":"<div><div>6PPD-quinone (6PPD-Q), a transformation product of tire rubber anti-oxidant 6PPD, has been identified as the primary causal toxicant for the urban runoff mortality syndrome observed in coho salmon (<em>Oncorhynchus kisutch</em>) in the Pacific Northwest, USA. Several other fish species are also vulnerable to 6PPD-Q. However, monitoring efforts on 6PPD-Q have been focused on water, particulate matter, soils, and sediments, while that in tissues remains scarce. This study presents a workflow for extraction and quantitative analysis of 6PPD-Q in complex tissues from shellfish, finfish, and marine mammals. A multi-residue extraction protocol was developed for quantitative analysis of 6PPD-Q and persistent organic pollutants (PCBs, PBDEs, organochlorine pesticides) and PAHs in tissues in a single extraction. A GC-MS/MS based 6PPD-Q measurement was also developed. The protocol was evaluated in tissues including fish fillets, whole fish homogenates, mussels, and whale blubber. Limits of quantification of 6PPD-Q were between 0.03 and 0.12 ng/g ww and the surrogate (6PPD-Q-d5) recoveries were ∼60–100 % among matrices. We also conducted an initial biomonitoring study using caged mussels (<em>Mytilus trossulus</em>) and juvenile Chinook salmon (<em>Oncorhynchus tshawytscha</em>) from Puget Sound, WA. 6PPD-Q detection rates were at least 50 % but the concentrations were mostly <1 ng/g ww. Our protocol will aid 6PPD-Q biomonitoring in aquatic environments and also exposure assessments for improved understanding of 6PPD-Q bioaccumulation potential in these food webs.</div></div>","PeriodicalId":276,"journal":{"name":"Chemosphere","volume":"379 ","pages":"Article 144418"},"PeriodicalIF":8.1,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847312","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}

引用次数: 0

Biochar alleviates nanoplastics and bisphenol A mediated immunological, neurological and gut microbial toxicity in channel catfish Ictalurus punctatus

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-18 DOI: 10.1016/j.chemosphere.2025.144422

Qingzhi Zheng , Yufeng Zheng , Muhammad Junaid , Ming Zeng , Hongping Liao , Ye Li , Yuanqi Zhao , Qian Huang , Jun Wang

Nanoplastics (NPs) and bisphenol A (BPA), exhibit abundant industrial applications, are produced in large volumes and ubiquitously released into the environment, posing a serious threat to ecological and human health. Biochar has been extensively studied for its ability to mitigate the negative effects of contaminants on plants. Therefore, this study aims to investigate whether biochar co-exposure with polystyrene nanoplastics (PS-NPs, size 80 nm) and BPA mitigate their toxic impacts on Ictalurus punctatus and maintain its normal growth. The I. punctatus was exposed individually to PS-NPs (0.5 mg/L) and BPA (0.2 mg/L) as well as co-exposed to PS-NPs + biochar and BPA + biochar for 7 days. Results showed PS-NPs and BPA single exposure caused tissue damage in terms of hepatocyte swelling and gut villi diffusion, and induced oxidative stress. PS-NPs and BPA single exposures led to significant changes in enzymatic activities and genetic expressions of biomarkers related to the immune system, producing inflammatory response. It also led to dysregulation of neurotransmitter enzymes (ACH, ChAT, AChE) and overexpression of neuron genes, resulting in neurotoxicity. Moreover, there was an increase in the diversity and alteration in composition of the gut microbiota (Plesiomonas, Pseudomonas), resulting in dysbiosis of the gut microbiota. However, biochar presence (0.5 g/L) reduced the accumulation of PS-NPs and BPA in fish and contributed to various degrees of mitigation for the toxic impacts of PS-NPs and BPA. Overall, biochar helped to mitigate the negative effects of PS-NPs and BPA on oxidative stress, histopathology, immune system, neurological responses and gut microbiota. This study emphasized the potential of biochar to mitigate the negative impacts of NPs and BPA on aquatic organisms.

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引用次数: 0

Microplastics in rice-based farming systems and their connection to plastic waste management in the Chicoral district of Espinal-Tolima

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2025-04-18 DOI: 10.1016/j.chemosphere.2025.144423

Jorge Leonardo Muñoz Yustres , Lina María Zapata-Restrepo , Maria Carolina Garcia-Chaves , Luis David Gomez-Mendez

The presence of microplastics (MPs) in agricultural soils is a growing concern, especially in rice cultivation systems, where information is limited, particularly in Latin America. Given the economic importance of this crop in Colombia and the generation of plastic waste from some associated practices, it is crucial to determine the presence of MPs related to agricultural activities in soils dedicated to this activity. This study evaluated the presence of MPs in soils and irrigation water of rice crops in Chicoral, Tolima, Colombia, during two contrasting seasons. Soil samples from seven plots (upper, middle, and lower zones) and water samples from seven points along the irrigation canal were collected. MPs were found in all samples, with similar concentrations in water samples collected in the rainy and dry seasons (0.11 ± 0.10 vs. 0.10 ± 0.06 items/m³, respectively), and higher abundance in soil samples during the rainy season (4 ± 2.71 vs 3.62 ± 1.92 items/50 g). Fragments and fibers were the most abundant forms of plastics (53 % water, 55 % soil), predominantly larger than 100 μm and blue in color. Polypropylene (PP) was the most abundant polymer (50 %) in the meso- and macroplastic samples. Our results suggested that MPs contamination in rice crop soils at Chicoral is influenced by irrigation water transport and improper plastic waste management, highlighting the need for further research on their effects on agricultural systems.

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