{"title":"Biomagnification and Burden of Organochlorinated Pesticides in Aquatic Ecosystem in the Zhalong Wetland, Northeastern China.","authors":"Luo Jinming, Liao Qiuxiang, Bai Lin","doi":"10.1007/s00128-026-04323-x","DOIUrl":"10.1007/s00128-026-04323-x","url":null,"abstract":"<p><p>Trophic biomagnification of dichloro diphenyl trichloroethanes (DDTs) and hexachlorocyclohexane isomers (HCHs) were investigated in key components of the China's Zhalong Wetland. Current OCP exposure levels posed minimal risk to the red-crowned crane (Grus japonensis) and Oriental stork (Ciconia boyciana). However, significant trophic transfer and biomagnification effects were observed. The trophic magnification factor (TMF) for DDTs was 1.45 in the prey group but increased to 2.82 in the top predator group. Top predators (large fish and waterfowl) exhibited significantly elevated biomagnification factors (BMFs) for DDTs compared to prey species (F = 22.75, p = 0.003). While BMFs for benthic invertebrates and small fish were below 2, those for top predators ranged from 59 to 110. This trend indicates enhanced biomagnification at higher trophic levels and explains the detectable DDT residues found in G. japonensis and C. boyciana in recent years.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Dynamic Degradation of Four Herbicides in Soil and Phytotoxicity to Chili and Tobacco.","authors":"Ruosheng Yang, Qinghao Liu, Fei Xue, Guangling Li, Lanlan Sun, Wangcang Su, Hongle Xu, Renhai Wu","doi":"10.1007/s00128-026-04327-7","DOIUrl":"10.1007/s00128-026-04327-7","url":null,"abstract":"<p><p>Herbicide carryover from wheat production can injure sensitive rotational cash crops, but compound-specific replanting guidance under matched soil and climatic conditions is limited. We combined an optimized QuEChERS method with ultra-high performance liquid chromatography to quantify soil residues of mesosulfuron-methyl, pyroxsulam, diflufenican, and pyroxasulfone and evaluate the phytotoxicity of these herbicides to rotational chili and tobacco. The recoveries of the four herbicides at 0.1-1 mg/kg spiking levels ranged from 74.42 to 117.33%, which fell within the acceptable recovery range for residue analysis, with RSDs less than 6.69%. The results of field experiments demonstrated that the half-lives of pyroxsulam, mesosulfuron-methyl, pyroxasulfone, and diflufenican were 9.4, 22.7, 113.6, and 203.8 days, respectively. The bioassays indicated that GR<sub>50</sub> of these herbicides on chili were 0.084, 0.116, 0.041, and 3.986 mg/kg, respectively. Similarly, the GR<sub>50</sub> of these herbicides on tobacco were 0.035, 0.128, 0.014, and 4.146 mg/kg, respectively. The safe intervals for the cultivation of chili and tobacco should exceed 3 months following the application of pyroxsulam and mesosulfuron-methyl. However, owing to the prolonged residual periods of pyroxasulfone and diflufenican in the soil, it is necessary to establish a safe planting interval for chili and tobacco that exceeds 24 months. This study provides a theoretical foundation for determining safe replanting practices for chili and tobacco as rotational crops following wheat field application of the four tested herbicides.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Microplastic Occurrence and Polymer Confirmation in Five Houston Urban Waterways.","authors":"Yasemin Umurhan, Tej B Limbu, Tuan Phan","doi":"10.1007/s00128-026-04326-8","DOIUrl":"10.1007/s00128-026-04326-8","url":null,"abstract":"<p><p>Polymer-confirmed freshwater microplastic data remain limited for Houston urban waterways. We screened five waterways during one winter baseflow period using inverted microscopy with Raman and ATR-FTIR confirmation of particles from 75 μm to 2 mm. Visually identified suspected plastic particles were observed in samples from all five waterways, with concentrations ranging from 8.7 to 9.2 particles L⁻¹. Fragments dominated most samples, while Buffalo Bayou and Vince Bayou showed higher fiber contributions. Spectroscopic analysis screened for a broad range of synthetic polymers and confirmed the occurrence of polyethylene terephthalate (PET), polyethylene (PE), and polypropylene (PP) among the analyzed particles. Because each waterway was represented by one composite sample and limited blank controls, the results should be interpreted as an initial descriptive screening dataset rather than as statistically generalizable site comparisons or quantitative polymer-abundance measurements.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13578043/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Ji-Hoon Kim, Joo-Yeon Kang, Kang In Shin, Thodhal Yognanadham Suman, Jongkyu Park, Ihn-Sil Kwak
{"title":"DGT Passive Samplers as Monitoring Alternatives When Heavy Metal Toxicity Eliminates Bioindicators in Contaminated Sediments.","authors":"Ji-Hoon Kim, Joo-Yeon Kang, Kang In Shin, Thodhal Yognanadham Suman, Jongkyu Park, Ihn-Sil Kwak","doi":"10.1007/s00128-026-04334-8","DOIUrl":"10.1007/s00128-026-04334-8","url":null,"abstract":"<p><p>Heavy metal pollution in sediments impacts benthic ecosystems. This study evaluated the adverse effects of Cd, Cu, and As on Tubifex tubifex and compared bioaccumulation with diffusive gradients in thin-films (DGT) passive samplers at three exposure doses. In medium (1.87 mg kg<sup>-1</sup> Cd, 228 mg kg<sup>-1</sup> Cu, 44.7 mg kg<sup>-1</sup> As) and high concentrations, 100% lethality occurred after 12 h, preventing bioaccumulation evaluation. Only low concentrations (0.4 mg kg<sup>-1</sup> Cd, 48 mg kg<sup>-1</sup> Cu, 15 mg kg<sup>-1</sup> As) allowed 10-day monitoring. DGT samplers provided quantitative physicochemically labile metal fraction measurements across all treatments, with reliable linear accumulation observed for Cd (R<sup>2</sup>=0.99, p=0.001) and As (R<sup>2</sup>=0.93, p=0.008) including at lethal concentrations. Cu accumulation at the High treatment showed poor linearity (R<sup>2</sup>=0.01, p=0.847), attributed to potential binding layer saturation under extreme contamination. DGT provides a complementary physicochemical exposure assessment tool when indicator mortality prevents traditional biomonitoring in contaminated sediments.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Comparison of Cadmium Efflux in Wheat (Triticum aestivum) Cultivars with Contrasting Cadmium Accumulation.","authors":"Yanshan Chen, Guosheng Wang, Wenxuan Xie, Ruiping Wang, Yue Cao, Xu Zou, Fei Yang, Yueming Zhu, Jiu Huang","doi":"10.1007/s00128-026-04331-x","DOIUrl":"10.1007/s00128-026-04331-x","url":null,"abstract":"<p><p>Cadmium (Cd) is a highly toxic heavy metal threatening human health. Wheat readily translocates Cd to grains, posing food safety risks in contaminated soils. Screening low-Cd cultivars is therefore critical. In pot experiments with 53 wheat cultivars, Kaimai 21 (KM21) and Lunxuan 6 (LX6) showed the lowest and highest grain Cd, respectively. Under 5-10 µM Cd in hydroponics, KM21 harbored 30.1%-63.6% lower root Cd, 54.7%-69.1% lower shoot Cd, and exhibited superior root growth and Cd tolerance than LX6. Crucially, KM21 showed a 36.9% higher Cd efflux rate and a larger Cd efflux proportion than LX6 (44.3% vs. 15.5%). Real-time Cd<sup>2+</sup> flux measurements using Non-invasive Micro-test Technology (NMT) further confirmed higher Cd efflux capacity in KM21, which contributed to higher Cd tolerance and lower Cd accumulation. Overall, KM21 is a stably high-Cd efflux and low-Cd accumulation wheat cultivar suitable for safe production in Cd-contaminated soils.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Chaoqun Zheng, Cheng Chen, Qibo Huang, Jinxin Wang, Liuyan Yang
{"title":"Transcriptional Responses of Electrolysis-Induced Dysfunctional Endocrine in Zebrafish (Danio rerio) Embryos.","authors":"Chaoqun Zheng, Cheng Chen, Qibo Huang, Jinxin Wang, Liuyan Yang","doi":"10.1007/s00128-026-04330-y","DOIUrl":"10.1007/s00128-026-04330-y","url":null,"abstract":"<p><p>Electrolysis is a cost-effective and efficient technology for pollutant removal, yet its potential ecological risks remain poorly understood. This study systematically examined the impact of electrolysis zebrafish (Danio rerio) embryonic development and endocrine function through transcriptomic analysis. Findings demonstrated that electrolytic exposure significantly modulated 585 differentially expressed genes (DEGs) involved in thyroid hormone signaling, glucose metabolism, and stress response. qRT-PCR validated the dysregulation of genes associated with ion homeostasis, endoplasmic reticulum stress, and cell-matrix interactions, linking these molecular shifts to endocrine disruption and developmental impairments. Additionally, increased Na⁺, K⁺-ATPase activity and elevated lactate levels indicated a metabolic shift from aerobic to anaerobic energy production. This study constitutes the first comprehensive investigation into the molecular mechanisms of electrolysis-induced endocrine toxicity, providing valuable insights for the biological safety assessment of electrolytic methods employed in water pollution control.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Factors Influencing the Clearance of Polystyrene Microplastics by Oysters: Roles of Environmental Conditions, Food Availability and Selection.","authors":"Yanping Li, Ke Pan","doi":"10.1007/s00128-026-04329-5","DOIUrl":"10.1007/s00128-026-04329-5","url":null,"abstract":"<p><p>This study investigated the abiotic and biotic factors regulating the removal of polystyrene microplastics (PS-MPs) from the water column by the oyster Crassostrea hongkongensis. Our data revealed that MP sequestration is highly dependent on environmental conditions and food characteristics. Optimal clearance occurred at 25 °C and medium estuarine salinity (20 psu), while extreme thermal stress (30 °C) and hyposaline conditions (5 psu) significantly depressed filtration. Light condition had little effect on the removal of PS-MPs. Increased food density remarkably stimulated oyster's clearance of PS-MPs, though high concentrations shifted the removal mechanism toward pre-ingestive rejection via pseudofeces. Furthermore, selective feeding on preferred Isochrysis galbana, Chaetoceros gracilis and Phaeodactylum tricornutum yielded significantly higher removal efficiencies than Thalassiosira weissflogii, Dunaliella salina and Chlorella vulgaris. These findings improve our understanding of how abiotic and biotic factors regulate bivalve's removal and pelagic-benthic transport of microplastics in fluctuating coastal environments.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148975187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"<sup>210</sup>Po Activity in Pacific Oysters (Crassostrea gigas) from Quang Ninh, Vietnam: High Activity, Influencing Factor, and Health Risk Assessment.","authors":"Xuan-Quang Nguyen, Van-Hao Duong, Marckasagayam Priyadharshini, Mohamed Saiyad Musthafa, Khai M Nguyen, Trung-Tien Chu","doi":"10.1007/s00128-026-04328-6","DOIUrl":"10.1007/s00128-026-04328-6","url":null,"abstract":"<p><p>This study evaluated <sup>210</sup>Po activity and associated risk assessment in two organs of 20 Pacific oyster (Crassostrea gigas) groups (different sizes) collected at coastal areas of Quang Ninh, Vietnam. The elevated <sup>210</sup>Po activity in hepatopancreas compared to muscle tissue, with mean values of 108 (53.4 ± 2.0 to 201 ± 12.1) and 15.7 (9.1 ± 0.4 to 26.3 ± 1.3) Bq/kg ww, respectively. The concentration factor (CF) in hepatopancreas (1.4 × 10<sup>5</sup>) was significantly higher than that in muscle tissue (1.9 × 10<sup>4</sup>), reflecting the preferential accumulation of <sup>210</sup>Po in the digestive tract. There was the inverse coefficient relationship between shell length and weight with <sup>210</sup>Po activity in muscle tissue, while no such correlation was found in hepatopancreas. Annual effective dose (AED) assessments showed that consumption of hepatopancreas far exceeded the reference value of 1 mSv/year, with mean values for adults, children, and infants of 1.35, 2.92, and 8.98 mSv/year, respectively. Meanwhile, the AED for muscle tissue was significantly lower, with mean AED values for adults, children, and infants being 0.20, 0.42, and 1.44 mSv/year, respectively. The total radiation dose to oysters ranged from 0.82 to 2.38 µGy/h, with a mean of 1.42 µGy/h, which is much lower than the ERICA reference threshold of 10 µGy/h, suggesting no significant risk to oyster population health. The study highlights specific recommendations to limit the consumption of oyster hepatopancreas, especially for sensitive populations such as children and infants, to minimize radiation exposure risk from oyster consumption.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148899937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Total Mercury Levels in Sea Cucumbers Holothuria polii and Holothuria tubulosa and Sediments from Two Sites of Southern Italy.","authors":"Gabriella Di Lena, Irene Casini, Roberto Caproni","doi":"10.1007/s00128-026-04288-x","DOIUrl":"10.1007/s00128-026-04288-x","url":null,"abstract":"<p><p>Holothurians are increasingly recognized as bioindicators and bioremediators in marine ecosystems. This study assessed the relationship between total mercury (THg) levels in Holothuria polii and Holothuria tubulosa from two Southern Italian coastal sites differing for ecological and anthropogenic characteristics, and those in corresponding marine sediments. THg levels in holothurians were consistently low across species and sites (0.0022-0.0146 mg kg<sup>- 1</sup> wet mass) and showed no direct correspondence with sediment levels, which were high (1.5080 ± 1.1687 mg kg<sup>- 1</sup> dry mass) at the Ionian site (IS), and low (0.0055 ± 0.0028 mg kg<sup>- 1</sup> dry mass) at the Adriatic site (AS). Despite lower sediment mercury contamination, the bioconcentration factor, indicator of the efficiency of metal bioaccumulation was higher at the AS site (3.54-4.76) than at the IS site (0.021-0.022), suggesting different mercury bioavailability in the sites. Size-related analyses of THg in holothurians indicated that THg levels in individual holothurians correlated positively with body size (p < 0.05), except for H. tubulosa from AS. Results demonstrate that site-specific factors, more than species-specific ones, play a key function in controlling mercury bioavailability and uptake in the studied holothurians, supporting their potential role in environmental monitoring and their safe consumption in the studied areas.</p>","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13524999/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148849658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Correction to: Tracing Potentially Toxic Metals from Water to Soil, Maize, and Cow Milk: Food Chain Risks and Safety Concerns.","authors":"Kafeel Ahmad, Mashal Maqsood, Zafar Iqbal Khan, Asma Ashfaq, Mutiya Zafar, Muhammad Mazhar Iqbal, Ijaz Rasool Noorka, Hafsa Memona, Farzana Siddique, Ilker Ugulu","doi":"10.1007/s00128-026-04312-0","DOIUrl":"10.1007/s00128-026-04312-0","url":null,"abstract":"","PeriodicalId":501,"journal":{"name":"Bulletin of Environmental Contamination and Toxicology","volume":"117 3","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148786771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}