Toxics最新文献 - Book学术

The Characteristics of PCDD/F and PCB Occurrence and the Effect of Age in Matched Tissues of Cattle and Sheep from Southern Italy. 意大利南部牛羊配对组织中PCDD/F和PCB的分布特征及年龄的影响

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-21 DOI: 10.3390/toxics14040348

Roberta Ceci, Gianfranco Diletti, Giampiero Scortichini, Ettore Franco, Angelo Pellegrino, Iain R Lake, Alwyn R Fernandes

{"title":"The Characteristics of PCDD/F and PCB Occurrence and the Effect of Age in Matched Tissues of Cattle and Sheep from Southern Italy.","authors":"Roberta Ceci, Gianfranco Diletti, Giampiero Scortichini, Ettore Franco, Angelo Pellegrino, Iain R Lake, Alwyn R Fernandes","doi":"10.3390/toxics14040348","DOIUrl":"https://doi.org/10.3390/toxics14040348","url":null,"abstract":"Toxic environmental contaminants, such as polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs), and polychlorinated biphenyls (PCBs) occur differentially in animal tissues. This study examined paired liver and muscle tissues from the same animals, reducing the uncertainty inherent in other studies that source tissues from different animals. Investigations were carried out on cattle and sheep from two separate herds in Southern Italy. As all animals experienced the same environmental impacts, husbandry, and feed regimes, contaminant distribution between tissues would result from physiological considerations, which would also allow for better examination of the effects of age. In both investigations, PCDD/F and PCB concentrations were significantly higher (p < 0.01) in the liver relative to muscle. A characteristic occurrence pattern showed PCBs dominating the combined toxic equivalence (TEQ) by >95% in cattle tissues and 78% and 67% in sheep muscle and liver, respectively. A majority of liver samples exceeded regulated maximum limits, and the herds were excluded from the food supply. Subsequent regional monitoring showed regulatory compliance of cattle/sheep meat and liver, but prominence of PCB-TEQ persisted. Concentrations of both contaminants declined strongly in the tissues of both species with increasing age of juveniles but stabilized in older animals (>one year in sheep; 2/3 years in cattle). Although weight gain might partly account for this pattern, the initial decline may also relate to inadequate levels of CYP enzymes in the youngest juveniles, but this would need to be confirmed in both species by targeted toxicokinetic studies during this perinatal period. The expression of these detoxifying enzymes is reported to rise rapidly with increasing postnatal age in many animal species, including sheep.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120415/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Mixed Heavy Metal Exposure During Pregnancy Induces GDM-like Metabolic Dysfunction Associated with Glycer-Ophospholipid Metabolic Reprogramming and Altered Insig1 Expression: A Multi-Omics Study in Rats. 妊娠期混合重金属暴露诱导与甘油-磷脂代谢重编程和Insig1表达改变相关的gdm样代谢功能障碍：大鼠多组学研究

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-21 DOI: 10.3390/toxics14040351

Tianao Sun, Zhanyue Zheng, Yongjie Ma, Minglian Pan, Yingjie Zhou, Jingxia Wei, Xinyu Yuan, Jinhao Wan, You Li, Yan Sun

{"title":"Mixed Heavy Metal Exposure During Pregnancy Induces GDM-like Metabolic Dysfunction Associated with Glycer-Ophospholipid Metabolic Reprogramming and Altered Insig1 Expression: A Multi-Omics Study in Rats.","authors":"Tianao Sun, Zhanyue Zheng, Yongjie Ma, Minglian Pan, Yingjie Zhou, Jingxia Wei, Xinyu Yuan, Jinhao Wan, You Li, Yan Sun","doi":"10.3390/toxics14040351","DOIUrl":"https://doi.org/10.3390/toxics14040351","url":null,"abstract":"This study aimed to investigate whether mixed heavy metal exposure (lead, cadmium, manganese, and arsenic) during pregnancy induces gestational diabetes mellitus (GDM)-like phenotypes and to explore the associated molecular alterations. We examined the effects of exposure on metabolic disturbances using a Sprague-Dawley rat model exposed to low- and high-dose mixed heavy metals, with doses selected based on biomonitoring data. The results showed that high-dose mixed heavy metal exposure significantly increased blood glucose levels in rats, elevated the area under the curve (AUC) during the oral glucose tolerance test (OGTT), and induced insulin resistance and dyslipidemia. Concurrently, pathological examinations revealed hepatocyte steatosis, inflammatory cell infiltration, and mitochondrial abnormalities in liver tissues. Transcriptomic and metabolomic analyses identified significant disruption of the glycerophospholipid metabolic pathway following heavy metal exposure, suggesting the involvement of this pathway in the observed metabolic disturbances. Lasso regression analysis identified Insig1 as a candidate gene associated with lipid metabolic alterations, a finding subsequently validated by qPCR. Overall, mixed heavy metal exposure during pregnancy was associated with GDM-like metabolic abnormalities in rats. Disruption of glycerophospholipid metabolism and altered Insig1 expression likely contribute to these effects, providing molecular evidence linking mixed heavy metal exposure to gestational metabolic dysfunction.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120483/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

The Characteristics of AOM and Formation of DBPs: The Role of Molecular Weights and Hydrophobicity. AOM的特性和dbp的形成：分子量和疏水性的作用。

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-21 DOI: 10.3390/toxics14040349

Lingfei Ma, Haipu Li, Zhaoguang Yang

{"title":"The Characteristics of AOM and Formation of DBPs: The Role of Molecular Weights and Hydrophobicity.","authors":"Lingfei Ma, Haipu Li, Zhaoguang Yang","doi":"10.3390/toxics14040349","DOIUrl":"https://doi.org/10.3390/toxics14040349","url":null,"abstract":"This study investigates the impacts of algogenic organic matter (AOM) distribution characteristics, specifically molecular weight (MW) and hydrophobicity, on the formation of disinfection byproducts (DBPs) derived from Microcystis aeruginosa. This study focuses on both extracellular organic matter (EOM) and intracellular organic matter (IOM) and their contributions to DBP formation. AOM was divided into 12 fractions based on MW and hydrophobicity (transphilic, hydrophilic, and hydrophobic fractions). The results reveal that the hydrophobic fraction (HPO) contributes the most to IOM, while low-MW (<1 kDa) and high-MW (>100 kDa) organic matter are the main components of AOM. An analysis of fluorescent species indicates that humic acid-like and fulvic acid-like compounds derived from the hydrophilic fraction (HPI) of EOM and the hydrophobic fraction (HPO) of IOM are the dominant low-MW (<1 kDa) species. Additionally, aromatic proteins derived from HPO in both EOM and IOM are the dominant high-MW (>100 kDa) fluorescent species. This suggests that proteins or polysaccharides are the primary adsorbents on the membrane during ultrafiltration (UF), while the humic acid component is not significantly deposited. Furthermore, this study identifies that the >100 kDa HPO in IOM serves as the main precursor for trichloromethane (TCM), trichloroacetic acid (TCAA), and dichloroacetic acid (DCAA). In EOM, the precursor for the highest TCMFP (63.6 µg/mg-C) is the >100 kDa HPI, while the highest contribution to TCM (21%) is from the >100 kDa HPO. These findings provide crucial information for controlling DBPs derived from AOM through membrane filtration, particularly in eutrophic water environments.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13119584/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Co-Exposure to Food-Grade and Nano-TiO₂ with High-Fat Diet Induces Multi-Organ Injury in Liver, Intestine, Brain, and Testicles. 与高脂肪饮食共同暴露于食品级和纳米tio2可诱导肝脏、肠、脑和睾丸多器官损伤。

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-21 DOI: 10.3390/toxics14040350

Ying Ma, Nairui Yu, Yi Zhang, Jiaqi Shi, Xinyan Zhou, Xiaojin Li, Li Guan, Guang Jia, Zhangjian Chen

{"title":"Co-Exposure to Food-Grade and Nano-TiO2 with High-Fat Diet Induces Multi-Organ Injury in Liver, Intestine, Brain, and Testicles.","authors":"Ying Ma, Nairui Yu, Yi Zhang, Jiaqi Shi, Xinyan Zhou, Xiaojin Li, Li Guan, Guang Jia, Zhangjian Chen","doi":"10.3390/toxics14040350","DOIUrl":"https://doi.org/10.3390/toxics14040350","url":null,"abstract":"Titanium dioxide nanoparticles (TiO2 NPs), widely used as food additives, frequently coexist with high-fat diets (HD) in modern dietary patterns, yet their combined in vivo toxicity remains poorly understood. This study investigated the multi-organ effects of co-exposure to TiO2 NPs or food-grade E171 and HD in male C57BL/6J mice. Mice were randomly assigned to six groups and fed regular or high-fat diets containing 1 wt% TiO2 NPs or E171 for 13 weeks. Histopathology, serum biochemistry, organ coefficients, and open-field behavioral tests were used to assess tissue injury and functional alterations. Co-exposure to TiO2 NPs and HD markedly exacerbated tissue damage across multiple organs. In the liver, more severe ballooning degeneration, necrosis, and inflammatory infiltration were observed, accompanied by altered liver enzymes and reduced organ coefficients. Intestinal injury was characterized by crypt distortion and increased inflammation, particularly in the HD + TiO2 group. Testicular tissues showed disorganized seminiferous tubules, loss of spermatogenic cells, and interstitial hyperplasia. In the brain, hippocampal neurons exhibited pyknosis and disarray, with decreased brain coefficients and impaired exploratory behavior. E171 induced similar but milder effects. These findings indicate that HD enhances TiO2 NPs induced multi-organ toxicity, highlighting the health risks of realistic co-exposure to dietary nanoparticles and high-fat foods.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120316/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Microplastics Decrease the Toxicity of ¹³⁷Cs in the Zebrafish Embryo-Larva. 微塑料降低了斑马鱼胚胎-幼虫体内137Cs的毒性。

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-20 DOI: 10.3390/toxics14040343

Fangni Du, Wenjun Zhao, Shaofei Cao, Rui Zhang, Yuchen Yin

{"title":"Microplastics Decrease the Toxicity of 137Cs in the Zebrafish Embryo-Larva.","authors":"Fangni Du, Wenjun Zhao, Shaofei Cao, Rui Zhang, Yuchen Yin","doi":"10.3390/toxics14040343","DOIUrl":"https://doi.org/10.3390/toxics14040343","url":null,"abstract":"Large amounts of radionuclides and microplastics (MPs) have been released and will continue to be discharge into the environment. They will exist and interact in the aquatic environment over extended periods. However, the toxicological risks associated with their co-exposure remain poorly understood. In this study, the zebrafish (Danio rerio) embryos were exposed to 137Cs (6.8 × 104 Bq/L) in combination with 9.9 μm polystyrene MPs (PS-MPs, 10, 100 μg/L) for 7 days. Early developmental growth was significantly influenced in the 137Cs-exposed groups. This was evidenced by delayed hatching, increased swimming total distance, and anxiety behavior (increasing swimming distance in the inner circle). Furthermore, transcriptomic analysis demonstrated that a higher number of differentially expressed genes were found in the 137Cs group compared to other exposure groups. In 137Cs groups, KEGG enrichment analysis highlighted significant disruptions in lipid metabolism pathways. 137Cs can influence its neuro-related genes by inducing lipid metabolism toxicity, providing a mechanistic explanation for the observed locomotory abnormalities in larvae. Interestingly, during the early stage of development, MPs appeared to reduce the internal irradiation dose and toxic effect by absorbing the 137Cs. Overall, this study enhances our understanding of the ecological risks posed by combined exposure to 137Cs and MPs.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120410/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147781993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Understanding the Causes of High Organic Matter with Low Bioavailability in Cold-Zone Lake Water: A Case in Hulun Lake. 寒区湖泊水体高有机质低生物利用度成因探析——以呼伦湖为例

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-20 DOI: 10.3390/toxics14040347

Yulong Tao

{"title":"Understanding the Causes of High Organic Matter with Low Bioavailability in Cold-Zone Lake Water: A Case in Hulun Lake.","authors":"Yulong Tao","doi":"10.3390/toxics14040347","DOIUrl":"https://doi.org/10.3390/toxics14040347","url":null,"abstract":"In cold-region lakes, high organic matter concentrations with low bioavailability are common, yet the underlying causes and stabilisation mechanisms remain unclear. This study conducted a 60-day microbial treatment experiment in Hulun Lake using algae (DOMa), grass (DOMg), and manure (DOMm) as DOM sources. Fourier transform ion cyclotron resonance mass spectrometry and 16S rRNA analysis were employed to characterise DOM composition and bacterial communities. The bioavailability of DOMa, DOMg, and DOMm was 86.1%, 84.08%, and 70.9%, respectively. Differences in degradation cycles were mainly associated with the slowly biodegradable fraction; the half-lives of DOMa, DOMg, and DOMm were 49.51 days, 77.02 days, and 198.04 days, respectively. At the molecular level, proteins and lipids were rapidly utilised by microorganisms, leading to the generation of lignin, condensed aromatic hydrocarbons, and tannins, with many new molecules falling within the carboxylic acid-rich alicyclic molecule (CRAM) region. The overall community succession patterns of different DOM sources were highly similar, with initial DOM composition differences leading to variations in microbial communities during intermediate degradation stages (5~10 days). Moreover, microbiological processes facilitated the convergence of DOM source compositions and the accumulation of refractory organic matter. It is hypothesised that the regional climatic characteristics of the freeze-thaw cycle exacerbate organic matter accumulation by compressing the \"effective degradation time\". These findings elucidate the causes of high organic matter and low bioavailability in cold-region lakes.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120219/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Multi-Metal Leachate from Lithium Slag Induces Oxidative Stress, Circadian Disruption, and Neurobehavioural Toxicity in Zebrafish Larvae. 锂渣多金属渗滤液诱导斑马鱼幼鱼氧化应激、昼夜节律紊乱和神经行为毒性。

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-20 DOI: 10.3390/toxics14040345

Xueping Huang, Shengping Zhang, Yu Liu, Shuai Liu, Qiyu Wang, Nannan Wan, Shanghaojun Lu, Yongming Wu, Miao Zhang

{"title":"Multi-Metal Leachate from Lithium Slag Induces Oxidative Stress, Circadian Disruption, and Neurobehavioural Toxicity in Zebrafish Larvae.","authors":"Xueping Huang, Shengping Zhang, Yu Liu, Shuai Liu, Qiyu Wang, Nannan Wan, Shanghaojun Lu, Yongming Wu, Miao Zhang","doi":"10.3390/toxics14040345","DOIUrl":"https://doi.org/10.3390/toxics14040345","url":null,"abstract":"The rising global demand for lithium has led to substantial accumulation of lithium slag, a by-product of lithium carbonate production and a potential environmental contaminant. Leachates from this material contain various metal elements and may pose risks to ecosystems and organismal health. However, research on its neurotoxicity and underlying mechanisms remains limited. In this study, zebrafish embryos at 6 h post-fertilisation were exposed to varying concentrations of lithium slag leachate for 7 days. The leachate contained multiple metal ions (Li, Fe, Mn, Ni, Zn, As, Cr, Cu, Hg, Cd, Pb, etc.). Following exposure, significant metal accumulation was observed in larvae, accompanied by developmental malformations (yolk sac oedema, cardiac haemorrhage, and uninflated swim bladders). Behavioural assessment revealed reduced swimming distance and velocity, along with disrupted circadian rhythms. Biochemical analyses showed elevated Reactive oxygen species (ROS), Superoxide dismutase (SOD), Catalase (CAT), and Malondialdehyde (MDA), alongside decreased Glutathione (GSH), indicating oxidative stress. Transcriptomic analysis confirmed downregulation of core circadian genes. Neurotransmitter assays revealed decreased acetylcholine (Ach), noradrenaline (NE), and dopamine (DA), with increased gamma-aminobutyric acid (GABA) and serotonin (5-HT). These findings demonstrate that lithium slag leachate induces oxidative stress, circadian disruption, and neurobehavioural toxicity in zebrafish, providing important evidence for environmental risk assessment.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120298/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147781957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Manganese-Enriched Biochar Reduces Cd Uptake and Accumulation in Rice by Altering Soil Cd Speciation and Enhancing Mn-Cd Antagonism. 富锰生物炭通过改变土壤Cd形态和增强Mn-Cd拮抗作用减少水稻对Cd的吸收和积累。

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-20 DOI: 10.3390/toxics14040346

Qian Wang, Xu Yan, Kexin Shao, Lingfei Zuo, Haoran Jiao, Wenjuan Fan, Juan Lin, Jinbiao Li, Min Lv, Anyong Hu, Yujie Han

{"title":"Manganese-Enriched Biochar Reduces Cd Uptake and Accumulation in Rice by Altering Soil Cd Speciation and Enhancing Mn-Cd Antagonism.","authors":"Qian Wang, Xu Yan, Kexin Shao, Lingfei Zuo, Haoran Jiao, Wenjuan Fan, Juan Lin, Jinbiao Li, Min Lv, Anyong Hu, Yujie Han","doi":"10.3390/toxics14040346","DOIUrl":"https://doi.org/10.3390/toxics14040346","url":null,"abstract":"Cadmium (Cd) contamination in paddy soils threatens rice production and food safety. This study investigated the effects of manganese (Mn)-enriched biochar on soil Cd immobilization and Cd accumulation in rice using a pot experiment with Cd-contaminated soil. Unenriched biochar and Mn-enriched biochar prepared from rice straw were applied at two rates (0.5% and 1.0%). Both biochar types significantly increased soil pH and organic matter and promoted the transformation of Cd from labile fractions to more stable residual forms, thereby reducing Cd bioavailability. As a result, Cd accumulation in rice tissues, including straw and brown rice, was significantly reduced. Correlation analysis further indicated that increased soil pH was associated with reduced Cd mobility and plant uptake. Mn-enriched biochar markedly increased Mn accumulation and uptake efficiency in rice while decreasing Cd uptake efficiency, indicating a strong antagonistic interaction between Mn and Cd in the soil-plant system. Notably, a low application rate of Mn-enriched biochar (0.5%) achieved Cd reduction effects comparable to those of a higher dose of unenriched biochar (1.0%). These results suggest that Mn-enriched biochar is an effective and potentially cost-efficient strategy for reducing Cd bioavailability in paddy soils and mitigating Cd accumulation in rice.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120333/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147781149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

The Long-Term Dynamics of the Particulate ¹³⁷Cs Supply from Eroded Arable Slopes During the Post-Chernobyl Period. 后切尔诺贝利时期侵蚀耕地坡面137Cs颗粒供应的长期动态。

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-19 DOI: 10.3390/toxics14040344

Maksim M Ivanov, Polina Fominykh, Nadezhda Ivanova, Sergei Krasnov, Valentin Golosov

{"title":"The Long-Term Dynamics of the Particulate 137Cs Supply from Eroded Arable Slopes During the Post-Chernobyl Period.","authors":"Maksim M Ivanov, Polina Fominykh, Nadezhda Ivanova, Sergei Krasnov, Valentin Golosov","doi":"10.3390/toxics14040344","DOIUrl":"https://doi.org/10.3390/toxics14040344","url":null,"abstract":"In rural areas affected by Chernobyl, accelerated erosion has become a major source of particulate 137Cs in sediment load. The long-term dynamics of the activity concentration in eroded soil material transported from individual slope catchments can be better understood by exploring the 137Cs depth distribution in sediments deposited near cultivated fields. This study focuses on three cultivated slope catchments located in the Chernobyl-affected area of Central Russia. A depth incremental campaign was conducted within zones of sediment accumulation in 2022-2025. The behavior of radiocaesium associated with particles after the Chernobyl accident was controlled by the prompt implementation of remediation measures. Shortly after the accident, the values decreased by more than two times. The radionuclide flux then began to depend on soil erosion processes. Gradually, the thickness of the upper soil that had been eroded became large enough to allow soil material from deeper layers to be involved during ordinary plowing and led to a subsequent decrease in the 137Cs activity concentration. Given the decreasing snowmelt runoff and lack of increase in high-intensity rainfall in the 21st century, the activity concentration of 137Cs in slope runoff has remained quite stable. This phenomenon requires consideration of whether a physically based model for the transport of particulate radionuclides should be developed.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120182/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147781917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

High-Resolution Detection of Microplastics in Zooplankton from Lake Como (Northern Italy): A Multi-Year Baseline for Large Deep Lakes. 意大利北部科莫湖浮游动物中微塑料的高分辨率检测：大型深湖的多年基线。

IF 4.1 3区环境科学与生态学

Toxics Pub Date : 2026-04-19 DOI: 10.3390/toxics14040342

Benedetta Villa, Gaia Bolla, Ginevra Boldrocchi, Roberta Bettinetti

{"title":"High-Resolution Detection of Microplastics in Zooplankton from Lake Como (Northern Italy): A Multi-Year Baseline for Large Deep Lakes.","authors":"Benedetta Villa, Gaia Bolla, Ginevra Boldrocchi, Roberta Bettinetti","doi":"10.3390/toxics14040342","DOIUrl":"https://doi.org/10.3390/toxics14040342","url":null,"abstract":"Microplastics (MPs) are emerging contaminants in freshwater ecosystems, yet their ingestion by zooplankton remains poorly documented in large European lakes. This study provides the first evidence of MPs in zooplankton from Lake Como (Northern Italy), a major subalpine lake of ecological and socioeconomic relevance. Using high-resolution digital microscopy (detection limit: 2 µm), we quantified MPs across four sampling years (2016, 2017, 2018, 2025), capturing small size fractions typically overlooked by conventional methods. MPs were consistently detected, with mean concentrations of 0.06 ± 0.08 MPs ind.-1 and 1.14 ± 1.22 MPs mg-1 d.w., values comparable to those reported for freshwater zooplankton worldwide. No significant differences were observed between the lake's two main branches, supporting a lake-wide interpretation of exposure. Clear seasonal patterns emerged, with higher MPs loads in autumn and winter. These findings highlight the potential for MPs to enter pelagic food webs and contribute to a lake-wide baseline for future harmonized monitoring and polymer-specific assessments. The main limitation of this study is the exclusive quantitative approach, which does not provide qualitative information on polymer composition. Overall, these results underscore the need to integrate zooplankton-based monitoring into freshwater microplastic risk assessment frameworks.","PeriodicalId":23195,"journal":{"name":"Toxics","volume":"14 4","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13120432/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147782036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0