Environmental Pollution最新文献_第10页

The endoplasmic reticulum-mitochondrial crosstalk involved in nanoplastics and di(2-ethylhexyl) phthalate co-exposure induced the damage to mouse mammary epithelial cells

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-06 DOI: 10.1016/j.envpol.2025.126014

Caihong Wang , Xiang Ji , Xiaoya Wang , Yunmeng Song , Chunqiang Pan , Mingrong Qian , Yuanxiang Jin

With the extensive use of plastic products, significant amounts of microplastics, nanoplastic particles (NPs), and plasticizers such as Di(2-ethylhexyl) phthalate (DEHP) are continuously released into the environment. However, the toxic effects of NPs alone or in combination with DEHP on mammary glands remain unreported. This study investigates the impacts of NPs and DEHP on the structure and function of mouse mammary epithelial cells and elucidates the underlying molecular mechanisms. We found that co-exposure to NPs and DEHP induced severe pyroptosis, inflammation and oxidative stress in HC11 cells. Co-exposure also caused mitochondrial damage, as evidenced by changes in mitochondrial membrane potential, increase in mitochondrial ROS and inhibition of ATP production. Moreover, NPs and DEHP co-exposure increased the transcriptional levels of endoplasmic reticulum (ER) stress-related genes, activated the inflammation-related NLRP3 signaling pathway, and damaged the cell membrane integrity. Notably, Co-exposure enhanced the ER-mitochondria crosstalk in HC11 cells, as evidenced by the upregulated transcriptional levels of ER Ca²⁺ channel proteins (Ip3r1, Grp75 and Vdac1), increased mitochondrial Ca²⁺ levels, and expanded mitochondrial-ER contact areas. In summary, this study revealed that NPs and DEHP co-exposure had the potential to induce pyroptosis and inflammation by enhancing the ER-mitochondria crosstalk, ultimately resulting in injury to mammary glands. These findings would provide some new insights into the molecular mechanisms underlying the toxic effects of NPs and DEHP to mammary glands.

{"title":"The endoplasmic reticulum-mitochondrial crosstalk involved in nanoplastics and di(2-ethylhexyl) phthalate co-exposure induced the damage to mouse mammary epithelial cells","authors":"Caihong Wang , Xiang Ji , Xiaoya Wang , Yunmeng Song , Chunqiang Pan , Mingrong Qian , Yuanxiang Jin","doi":"10.1016/j.envpol.2025.126014","DOIUrl":"10.1016/j.envpol.2025.126014","url":null,"abstract":"<div><div>With the extensive use of plastic products, significant amounts of microplastics, nanoplastic particles (NPs), and plasticizers such as Di(2-ethylhexyl) phthalate (DEHP) are continuously released into the environment. However, the toxic effects of NPs alone or in combination with DEHP on mammary glands remain unreported. This study investigates the impacts of NPs and DEHP on the structure and function of mouse mammary epithelial cells and elucidates the underlying molecular mechanisms. We found that co-exposure to NPs and DEHP induced severe pyroptosis, inflammation and oxidative stress in HC11 cells. Co-exposure also caused mitochondrial damage, as evidenced by changes in mitochondrial membrane potential, increase in mitochondrial ROS and inhibition of ATP production. Moreover, NPs and DEHP co-exposure increased the transcriptional levels of endoplasmic reticulum (ER) stress-related genes, activated the inflammation-related NLRP3 signaling pathway, and damaged the cell membrane integrity. Notably, Co-exposure enhanced the ER-mitochondria crosstalk in HC11 cells, as evidenced by the upregulated transcriptional levels of ER Ca<sup>2+</sup> channel proteins (<em>Ip3r1</em>, <em>Grp75</em> and <em>Vdac1</em>), increased mitochondrial Ca<sup>2+</sup> levels, and expanded mitochondrial-ER contact areas. In summary, this study revealed that NPs and DEHP co-exposure had the potential to induce pyroptosis and inflammation by enhancing the ER-mitochondria crosstalk, ultimately resulting in injury to mammary glands. These findings would provide some new insights into the molecular mechanisms underlying the toxic effects of NPs and DEHP to mammary glands.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126014"},"PeriodicalIF":7.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560831","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

Magnolol protects C6 glioma cells against neurotoxicity of FB1 via modulating PI3K/Akt and mitochondria-associated apoptosis signaling pathways

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-06 DOI: 10.1016/j.envpol.2025.126017

Yingjie Wang , Dai Cheng , Jingjing He , Sijia Liu , Xinlu Wang , Meng Wang

Fumonisin B1 (FB1) is a contaminant commonly occurring in crops and food. Mycotoxin contamination, including FB1, has been progressively shown to be an important risk factor in mediating neurotoxicity and neurodegenerative diseases. Studies have found that magnolol (MAG) exhibits favorable pharmacological effects in the central nervous system. However, the protective effects of MAG against FB1-induced neurotoxicity and the molecular pathways involved have not been fully elucidated. Our study aimed to investigate the neuroprotective effects of MAG on FB1-exposed C6 cells and to identify the underlying mechanisms. A model of FB1-induced cytotoxicity in C6 glial cells was established. C6 cells were treated with MAG (40, 80 and 160 μM) in the presence/absence of FB1 (15 μM) and then assessed for cell viability, cellular and mitochondrial morphology and oxidative stress. The mechanism of action of MAG was revealed using a variety of means including RNA-seq, qRT-PCR, Western blot, immunofluorescence, scanning electron microscopy analysis and agonist validation experiments. Our results indicated that MAG significantly alleviated AFB1-induced C6 astroglial cytotoxicity, as evidenced by elevated cell viability and restoration of overall cellular and mitochondrial morphology. Meanwhile, MAG also alleviated oxidative stress in FB1-exposed C6 cells, with 80 μM MAG showing the best effect. Transcriptome analysis showed that PI3K/Akt and apoptosis involved in it might be the key pathway for MAG to treat FB1 neurotoxicity. MAG suppressed FB1-induced mitochondria-dependent apoptosis in C6 cells, primarily manifested by reduced apoptosis rate and reversal of apoptosis-associated protein expression. It was verified that MAG restored the expression of p-PI3K and p-Akt in FB1-treated cells and reversed the downstream effectors IKKα and NF-κB via measurement of related protein levels. The rescue experiment using Akt pathway activator (SC79) was further confirmed that activation of the PI3K/Akt signaling pathway is an effective strategy for MAG to mitigate FB1-induced cytotoxicity in C6 astroglial cells.

{"title":"Magnolol protects C6 glioma cells against neurotoxicity of FB1 via modulating PI3K/Akt and mitochondria-associated apoptosis signaling pathways","authors":"Yingjie Wang , Dai Cheng , Jingjing He , Sijia Liu , Xinlu Wang , Meng Wang","doi":"10.1016/j.envpol.2025.126017","DOIUrl":"10.1016/j.envpol.2025.126017","url":null,"abstract":"<div><div>Fumonisin B1 (FB1) is a contaminant commonly occurring in crops and food. Mycotoxin contamination, including FB1, has been progressively shown to be an important risk factor in mediating neurotoxicity and neurodegenerative diseases. Studies have found that magnolol (MAG) exhibits favorable pharmacological effects in the central nervous system. However, the protective effects of MAG against FB1-induced neurotoxicity and the molecular pathways involved have not been fully elucidated. Our study aimed to investigate the neuroprotective effects of MAG on FB1-exposed C6 cells and to identify the underlying mechanisms. A model of FB1-induced cytotoxicity in C6 glial cells was established. C6 cells were treated with MAG (40, 80 and 160 μM) in the presence/absence of FB1 (15 μM) and then assessed for cell viability, cellular and mitochondrial morphology and oxidative stress. The mechanism of action of MAG was revealed using a variety of means including RNA-seq, qRT-PCR, Western blot, immunofluorescence, scanning electron microscopy analysis and agonist validation experiments. Our results indicated that MAG significantly alleviated AFB1-induced C6 astroglial cytotoxicity, as evidenced by elevated cell viability and restoration of overall cellular and mitochondrial morphology. Meanwhile, MAG also alleviated oxidative stress in FB1-exposed C6 cells, with 80 μM MAG showing the best effect. Transcriptome analysis showed that PI3K/Akt and apoptosis involved in it might be the key pathway for MAG to treat FB1 neurotoxicity. MAG suppressed FB1-induced mitochondria-dependent apoptosis in C6 cells, primarily manifested by reduced apoptosis rate and reversal of apoptosis-associated protein expression. It was verified that MAG restored the expression of p-PI3K and p-Akt in FB1-treated cells and reversed the downstream effectors IKKα and NF-κB via measurement of related protein levels. The rescue experiment using Akt pathway activator (SC79) was further confirmed that activation of the PI3K/Akt signaling pathway is an effective strategy for MAG to mitigate FB1-induced cytotoxicity in C6 astroglial cells.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126017"},"PeriodicalIF":7.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143569784","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

Uncovering key sources of regional ozone simulation biases using machine learning and SHAP analysis

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-06 DOI: 10.1016/j.envpol.2025.126012

Xin Yuan , Xinlong Hong , Zhijiong Huang , Li Sheng , Jinlong Zhang , Duohong Chen , Zhuangmin Zhong , Boguang Wang , Junyu Zheng

Atmospheric chemical transport models (CTMs) are widely used in air quality management, but still have large biases in simulations. Accurately and efficiently identifying key sources of simulation biases is crucial for model improvement. However, traditional approaches, such as sensitivity and uncertainty analyses, are computationally intensive and inefficient, as they require numerous model runs. In this study, we explored the use of machine learning, specifically XGBoost combined with SHAP analysis, as an efficient diagnostic tool for analyzing simulation biases, focusing on ozone modeling in Guangdong Province as a case study. We used the bias of model inputs as features and excluded a dataset that was more susceptible to observational uncertainties to better target bias sources. Results reveal that biases in concentrations of NO₂, NO and PM_2.5, temperature and biogenic emissions are important sources that lead to O₃ simulation biases. Notably, NO_x emissions were identified as the primary cause, particularly in VOC-limited regimes during autumn and winter. Additionally, underestimated NO_x emissions caused the model to misrepresent the NO₂-O₃ relationship, leading to an underestimation of the spatial extent of VOC-limited regimes in the PRD. This study demonstrates that enhancing NO_x emission estimates reduces O₃ simulation biases in the PRD by 34% and enhances the representation of the NO₂-O₃ relationship.

{"title":"Uncovering key sources of regional ozone simulation biases using machine learning and SHAP analysis","authors":"Xin Yuan , Xinlong Hong , Zhijiong Huang , Li Sheng , Jinlong Zhang , Duohong Chen , Zhuangmin Zhong , Boguang Wang , Junyu Zheng","doi":"10.1016/j.envpol.2025.126012","DOIUrl":"10.1016/j.envpol.2025.126012","url":null,"abstract":"<div><div>Atmospheric chemical transport models (CTMs) are widely used in air quality management, but still have large biases in simulations. Accurately and efficiently identifying key sources of simulation biases is crucial for model improvement. However, traditional approaches, such as sensitivity and uncertainty analyses, are computationally intensive and inefficient, as they require numerous model runs. In this study, we explored the use of machine learning, specifically XGBoost combined with SHAP analysis, as an efficient diagnostic tool for analyzing simulation biases, focusing on ozone modeling in Guangdong Province as a case study. We used the bias of model inputs as features and excluded a dataset that was more susceptible to observational uncertainties to better target bias sources. Results reveal that biases in concentrations of NO<sub>2</sub>, NO and PM<sub>2.5</sub>, temperature and biogenic emissions are important sources that lead to O<sub>3</sub> simulation biases. Notably, NO<sub>x</sub> emissions were identified as the primary cause, particularly in VOC-limited regimes during autumn and winter. Additionally, underestimated NO<sub>x</sub> emissions caused the model to misrepresent the NO<sub>2</sub>-O<sub>3</sub> relationship, leading to an underestimation of the spatial extent of VOC-limited regimes in the PRD. This study demonstrates that enhancing NO<sub>x</sub> emission estimates reduces O<sub>3</sub> simulation biases in the PRD by 34% and enhances the representation of the NO<sub>2</sub>-O<sub>3</sub> relationship.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126012"},"PeriodicalIF":7.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561338","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

Foodweb dynamics affect arsenic speciation and bioaccumulation in lakes affected by gold mines

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-05 DOI: 10.1016/j.envpol.2025.125999

Jules M. Blais, Emmanuel Yumvihoze, Hing Man Chan

We investigated the bioaccumulation patterns of arsenic species in freshwater food webs from three lakes near historical mining operations in the Northwest Territories, Canada. Two of these lakes (Long Lake and Lower Martin Lake) were located within 5 km of the mine's roaster stacks, while a third lake (Small Lake), situated 27 km away, served as a far-field reference site. In each lake, we measured the concentrations of arsenic species, including As(III), As(V), MMA, DMA and organic arsenobetaine, AsB, across multiple environmental and biological compartments, including water, sediment, macrophytes, periphyton, phytoplankton, zooplankton, benthic invertebrates, and small- and large-bodied fish. Across all lakes, total arsenic and inorganic arsenic (As(III) and As(V)) concentrations were inversely related to an organism's trophic position as determined by δ¹⁵N. This trend likely reflects the biotransformation of inorganic arsenic to AsB within tissues as well as increased dietary intake of AsB-rich prey, which facilitates As elimination. Our findings suggest that trophic position is a key determinant of inorganic arsenic bioaccumulation, explaining 39–89% of inorganic As bioaccumulation.

{"title":"Foodweb dynamics affect arsenic speciation and bioaccumulation in lakes affected by gold mines","authors":"Jules M. Blais, Emmanuel Yumvihoze, Hing Man Chan","doi":"10.1016/j.envpol.2025.125999","DOIUrl":"10.1016/j.envpol.2025.125999","url":null,"abstract":"<div><div>We investigated the bioaccumulation patterns of arsenic species in freshwater food webs from three lakes near historical mining operations in the Northwest Territories, Canada. Two of these lakes (Long Lake and Lower Martin Lake) were located within 5 km of the mine's roaster stacks, while a third lake (Small Lake), situated 27 km away, served as a far-field reference site. In each lake, we measured the concentrations of arsenic species, including As(III), As(V), MMA, DMA and organic arsenobetaine, AsB, across multiple environmental and biological compartments, including water, sediment, macrophytes, periphyton, phytoplankton, zooplankton, benthic invertebrates, and small- and large-bodied fish. Across all lakes, total arsenic and inorganic arsenic (As(III) and As(V)) concentrations were inversely related to an organism's trophic position as determined by δ<sup>15</sup>N. This trend likely reflects the biotransformation of inorganic arsenic to AsB within tissues as well as increased dietary intake of AsB-rich prey, which facilitates As elimination. Our findings suggest that trophic position is a key determinant of inorganic arsenic bioaccumulation, explaining 39–89% of inorganic As bioaccumulation.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 125999"},"PeriodicalIF":7.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Weak salinization alleviates the harmful impact of cyanobacteria on water fleas

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-05 DOI: 10.1016/j.envpol.2025.126002

Kun Yang , Jianan Li , Yusen Xie , Yin Chen , Haoran Zhang , Xiaodong Jiang

Climate change and anthropogenic activities are driving dramatic changes in aquatic ecosystems. In this context, cyanobacterial blooms and freshwater salinization have recently received much attention, however, the comprehensive effects of these stressors on aquatic organisms are complex and have yet to be accurately clarified. This study tested the harmful effects of cyanobacteria and increasing salinity on zooplankton by characterizing the life-history traits and gut microbiota composition in the large-bodied Daphnia pulex and small-bodied Simocephalus vetulus. In 0 g L⁻¹ salinity, the intrinsic growth rates of both species decreased when fed a diet containing cyanobacteria. Without cyanobacteria, the intrinsic growth rate of D. pulex was highest at 1 g L⁻¹ salinity and lowest at 2 g L⁻¹, whereas that of S. vetulus declined as salinity levels rose. Salinity alleviated the negative effects of cyanobacteria on water fleas. D. pulex performed worse than S. vetulus under high salinity (2 g L⁻¹), cyanobacteria or their combined effects. Salinity changed the dominant gut microbiota in the water fleas when fed cyanobacteria. Bacteroides sp. and Cetobacterium sp. in D. pulex and Cetobacterium sp. in S. vetulus were most abundant when the water fleas were reared at low salinity (1 g L⁻¹). The consistent changes in the dominant bacterial groups and the life-history traits indicate that the gut microbiota might adjust their tolerance to cyanobacteria.

{"title":"Weak salinization alleviates the harmful impact of cyanobacteria on water fleas","authors":"Kun Yang , Jianan Li , Yusen Xie , Yin Chen , Haoran Zhang , Xiaodong Jiang","doi":"10.1016/j.envpol.2025.126002","DOIUrl":"10.1016/j.envpol.2025.126002","url":null,"abstract":"<div><div>Climate change and anthropogenic activities are driving dramatic changes in aquatic ecosystems. In this context, cyanobacterial blooms and freshwater salinization have recently received much attention, however, the comprehensive effects of these stressors on aquatic organisms are complex and have yet to be accurately clarified. This study tested the harmful effects of cyanobacteria and increasing salinity on zooplankton by characterizing the life-history traits and gut microbiota composition in the large-bodied <em>Daphnia pulex</em> and small-bodied <em>Simocephalus vetulus</em>. In 0 g L<sup>−1</sup> salinity, the intrinsic growth rates of both species decreased when fed a diet containing cyanobacteria. Without cyanobacteria, the intrinsic growth rate of <em>D. pulex</em> was highest at 1 g L<sup>−1</sup> salinity and lowest at 2 g L<sup>−1</sup>, whereas that of <em>S. vetulus</em> declined as salinity levels rose. Salinity alleviated the negative effects of cyanobacteria on water fleas. <em>D. pulex</em> performed worse than <em>S. vetulus</em> under high salinity (2 g L<sup>−1</sup>), cyanobacteria or their combined effects. Salinity changed the dominant gut microbiota in the water fleas when fed cyanobacteria. <em>Bacteroides</em> sp. and <em>Cetobacterium</em> sp. in <em>D. pulex</em> and <em>Cetobacterium</em> sp. in <em>S. vetulus</em> were most abundant when the water fleas were reared at low salinity (1 g L<sup>−1</sup>). The consistent changes in the dominant bacterial groups and the life-history traits indicate that the gut microbiota might adjust their tolerance to cyanobacteria.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126002"},"PeriodicalIF":7.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561339","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

Occurrence of current-use pesticides in sediment cores from lakes and peatlands in pristine mountain areas of Brazilian national parks

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-05 DOI: 10.1016/j.envpol.2025.126005

Patrícia C.G. Pereira , Cláudio E.T. Parente , Yago Guida , Raquel Capella , Gabriel O. Carvalho , Pavlína Karásková , Jiří Kohoutek , Karla Pozo , Petra Přibylová , Jana Klánová , João P.M. Torres , Paulo R. Dorneles , Rodrigo O. Meire

This study assessed the occurrence of current-use pesticides in sediment cores from six lakes and peatlands in high-altitude (1952–2374 m) pristine areas within two southeastern Brazilian National Parks: Itatiaia National Park (IT-NP) and Serra dos Órgãos National Park (SO-NP). We sampled three sediment cores from lakes at IT-NP and three from peatlands at SO-NP, totaling 60 subsamples. Among the 38 current-use pesticides assessed, 17 were found in at least one sample, with 14 - including herbicides, insecticides, fungicides, and acaricides - identified in both parks. The most frequently detected pesticides were carbendazim and carbaryl (75–95%), followed by acetochlor, chlorpyrifos, diuron, metolachlor and tebuconazole (40–70%) and, to a lesser extent, terbuthylazine and malathion (10–30%). The organophosphates disulfoton (6.83 ± 20.18 ng g⁻¹ dry weight) and chlorpyrifos (4.34 ± 6.81 ng g⁻¹ dw) registered the highest concentrations across all compounds in the sediment layers, with chlorpyrifos showing the greatest relative abundance (65.9–92.8%) in four out of six sites. Risk characterization results revealed highest risk quotient (RQ) values (416–14,589) for chlorpyrifos, indicating potential ecological risks. High RQs were also obtained for acetochlor (5.76–94.6), carbaryl (0.4–4.08), carbendazim (0.09–3.46), diazinon (2048), disulfoton (34–569), diuron (1.45–35.0) and malathion (10.94). These results highlight the threat posed by long-range pesticide transport to pristine areas at National Parks. Urgent regulatory measures are needed to mitigate their impact and safeguard these ecosystems from degradation.

{"title":"Occurrence of current-use pesticides in sediment cores from lakes and peatlands in pristine mountain areas of Brazilian national parks","authors":"Patrícia C.G. Pereira , Cláudio E.T. Parente , Yago Guida , Raquel Capella , Gabriel O. Carvalho , Pavlína Karásková , Jiří Kohoutek , Karla Pozo , Petra Přibylová , Jana Klánová , João P.M. Torres , Paulo R. Dorneles , Rodrigo O. Meire","doi":"10.1016/j.envpol.2025.126005","DOIUrl":"10.1016/j.envpol.2025.126005","url":null,"abstract":"<div><div>This study assessed the occurrence of current-use pesticides in sediment cores from six lakes and peatlands in high-altitude (1952–2374 m) pristine areas within two southeastern Brazilian National Parks: Itatiaia National Park (IT-NP) and Serra dos Órgãos National Park (SO-NP). We sampled three sediment cores from lakes at IT-NP and three from peatlands at SO-NP, totaling 60 subsamples. Among the 38 current-use pesticides assessed, 17 were found in at least one sample, with 14 - including herbicides, insecticides, fungicides, and acaricides - identified in both parks. The most frequently detected pesticides were carbendazim and carbaryl (75–95%), followed by acetochlor, chlorpyrifos, diuron, metolachlor and tebuconazole (40–70%) and, to a lesser extent, terbuthylazine and malathion (10–30%). The organophosphates disulfoton (6.83 ± 20.18 ng g<sup>−1</sup> dry weight) and chlorpyrifos (4.34 ± 6.81 ng g<sup>−1</sup> dw) registered the highest concentrations across all compounds in the sediment layers, with chlorpyrifos showing the greatest relative abundance (65.9–92.8%) in four out of six sites. Risk characterization results revealed highest risk quotient (RQ) values (416–14,589) for chlorpyrifos, indicating potential ecological risks. High RQs were also obtained for acetochlor (5.76–94.6), carbaryl (0.4–4.08), carbendazim (0.09–3.46), diazinon (2048), disulfoton (34–569), diuron (1.45–35.0) and malathion (10.94). These results highlight the threat posed by long-range pesticide transport to pristine areas at National Parks. Urgent regulatory measures are needed to mitigate their impact and safeguard these ecosystems from degradation.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126005"},"PeriodicalIF":7.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143546532","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

Bioavailability assessment of propiconazole to Limnobium laevigatum and zebrafish (Danio rerio) in aquatic microcosms

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-05 DOI: 10.1016/j.envpol.2025.126004

Xiaojian Feng , Xinyi Guo , Sen Pang , Mingcheng Guo , Yajie Chen

Residues of the triazole fungicide propiconazole (PCZ) in the environment can easily enter aquatic ecosystems through various pathways and accumulate in sediments, thus threatening ecosystem stability. The method of using passive sampling techniques to measure the freely dissolved concentration (C_free) of pollutants in aquatic environments for assessing their bioavailability has been widely utilized in environmental risk assessments. This study employs oleic acid-embedded cellulose acetate membrane (OECAM) as a tool to determine the C_free of PCZ in water. By establishing sediment spiking concentrations of 0.1 and 0.5 mg/kg in an aquatic microcosm, the distribution and bioaccumulation of PCZ in zebrafish (Danio rerio) and the aquatic plant Limnobium laevigatum (L. laevigatum) were examined over a 7-day period. During the experimental period, the concentrations of PCZ in the water for the 0.1 mg/kg and 0.5 mg/kg treatment groups remained approximately 0.9 μg/L and 10.0 μg/L, respectively. After 7 days, the PCZ content in the sediments decreased by 22.74% and 14.94%, respectively. In both zebrafish and L. laevigatum, the concentration of PCZ initially increased and then gradually stabilized, with both species exhibiting moderate accumulation ability for PCZ. The bioconcentration factor (BCF) for zebrafish in the 0.1 mg/kg and 0.5 mg/kg treatment groups ranged from 9.25 to 13.96 and 7.84–16.05, respectively, while those for L. laevigatum ranged from 28.17 to 31.40 and 23.01–36.11, respectively. By the end of the 7-day experiment, the total PCZ content in both treatment groups decreased by an average of 17.51%. Among them, L. laevigatum contributed significantly, highlighting its potential in accelerating the removal of PCZ from aquatic ecosystems.

{"title":"Bioavailability assessment of propiconazole to Limnobium laevigatum and zebrafish (Danio rerio) in aquatic microcosms","authors":"Xiaojian Feng , Xinyi Guo , Sen Pang , Mingcheng Guo , Yajie Chen","doi":"10.1016/j.envpol.2025.126004","DOIUrl":"10.1016/j.envpol.2025.126004","url":null,"abstract":"<div><div>Residues of the triazole fungicide propiconazole (PCZ) in the environment can easily enter aquatic ecosystems through various pathways and accumulate in sediments, thus threatening ecosystem stability. The method of using passive sampling techniques to measure the freely dissolved concentration (<em>C</em><sub>free</sub>) of pollutants in aquatic environments for assessing their bioavailability has been widely utilized in environmental risk assessments. This study employs oleic acid-embedded cellulose acetate membrane (OECAM) as a tool to determine the <em>C</em><sub>free</sub> of PCZ in water. By establishing sediment spiking concentrations of 0.1 and 0.5 mg/kg in an aquatic microcosm, the distribution and bioaccumulation of PCZ in zebrafish (<em>Danio rerio</em>) and the aquatic plant <em>Limnobium laevigatum</em> (<em>L. laevigatum)</em> were examined over a 7-day period. During the experimental period, the concentrations of PCZ in the water for the 0.1 mg/kg and 0.5 mg/kg treatment groups remained approximately 0.9 μg/L and 10.0 μg/L, respectively. After 7 days, the PCZ content in the sediments decreased by 22.74% and 14.94%, respectively. In both zebrafish and <em>L. laevigatum</em>, the concentration of PCZ initially increased and then gradually stabilized, with both species exhibiting moderate accumulation ability for PCZ. The bioconcentration factor (BCF) for zebrafish in the 0.1 mg/kg and 0.5 mg/kg treatment groups ranged from 9.25 to 13.96 and 7.84–16.05, respectively, while those for <em>L. laevigatum</em> ranged from 28.17 to 31.40 and 23.01–36.11, respectively. By the end of the 7-day experiment, the total PCZ content in both treatment groups decreased by an average of 17.51%. Among them, <em>L. laevigatum</em> contributed significantly, highlighting its potential in accelerating the removal of PCZ from aquatic ecosystems.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126004"},"PeriodicalIF":7.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143546376","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

Leaching dynamics of Zn2+, Pb2+ and Cu2+ in urban soils of a semi-arid region: A quantitative analysis

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-05 DOI: 10.1016/j.envpol.2025.125955

Efrain Vizuete-Jaramillo , Agustin Robles-Morua , Francisco Robert Alexander Ziegler-Rivera

In this study, we evaluate the leaching process and movement of PTEs once they reach the soil profile in urban soils in a semiarid city in northwest Mexico. Concentrations of Zn²⁺, Pb²⁺ and Cu²⁺ were quantified in an urban area using ion-exchange resin (IER) samplers. The IER is a passive method based on ion-exchange resins which allows sampling the transport of elements in macropores under unsaturated flow conditions. Samples were taken during three monitoring periods in a city influenced by the North American Monsoon (NAM). In the first monitoring period, the IER samplers showed leaching rates of 323.40 g Zn²⁺ ha⁻¹ 15 wk⁻¹, 361.90 g Pb²⁺ ha^-115 wk⁻¹, and 31.9 g Cu²⁺ ha^-115 wk⁻¹. The second period estimated 101.50 g Zn²⁺ ha⁻¹ 37 wk⁻¹, 58.20 g Pb²⁺ ha⁻¹ 37 wk⁻¹, and 20.00 g Cu²⁺ ha⁻¹ 37 wk⁻¹. Finally, in the third monitoring period concentrations of 141.90 g Zn²⁺ ha^-117 wk⁻¹, 32.10 g Pb²⁺ ha⁻¹ 17 wk⁻¹ and 20.70 g Cu²⁺ ha⁻¹ 17 wk⁻¹ were found. The highest leaching rate of PTEs was identified in the central area of the city and its surroundings, influenced mainly by flood areas and high surface runoff. The results of this study demonstrate the role that monsoon rains and runoff plays in the movement and distribution of PTEs in urban areas.

{"title":"Leaching dynamics of Zn2+, Pb2+ and Cu2+ in urban soils of a semi-arid region: A quantitative analysis","authors":"Efrain Vizuete-Jaramillo , Agustin Robles-Morua , Francisco Robert Alexander Ziegler-Rivera","doi":"10.1016/j.envpol.2025.125955","DOIUrl":"10.1016/j.envpol.2025.125955","url":null,"abstract":"<div><div>In this study, we evaluate the leaching process and movement of PTEs once they reach the soil profile in urban soils in a semiarid city in northwest Mexico. Concentrations of Zn<sup>2+</sup>, Pb<sup>2+</sup> and Cu<sup>2+</sup> were quantified in an urban area using ion-exchange resin (IER) samplers. The IER is a passive method based on ion-exchange resins which allows sampling the transport of elements in macropores under unsaturated flow conditions. Samples were taken during three monitoring periods in a city influenced by the North American Monsoon (NAM). In the first monitoring period, the IER samplers showed leaching rates of 323.40 g Zn<sup>2+</sup> ha<sup>−1</sup> 15 wk<sup>−1</sup>, 361.90 g Pb<sup>2+</sup> ha<sup>-1</sup>15 wk<sup>−1</sup>, and 31.9 g Cu<sup>2+</sup> ha<sup>-1</sup>15 wk<sup>−1</sup>. The second period estimated 101.50 g Zn<sup>2+</sup> ha<sup>−1</sup> 37 wk<sup>−1</sup>, 58.20 g Pb<sup>2+</sup> ha<sup>−1</sup> 37 wk<sup>−1</sup>, and 20.00 g Cu<sup>2+</sup> ha<sup>−1</sup> 37 wk<sup>−1</sup>. Finally, in the third monitoring period concentrations of 141.90 g Zn<sup>2+</sup> ha<sup>-1</sup>17 wk<sup>−1</sup>, 32.10 g Pb<sup>2+</sup> ha<sup>−1</sup> 17 wk<sup>−1</sup> and 20.70 g Cu<sup>2+</sup> ha<sup>−1</sup> 17 wk<sup>−1</sup> were found. The highest leaching rate of PTEs was identified in the central area of the city and its surroundings, influenced mainly by flood areas and high surface runoff. The results of this study demonstrate the role that monsoon rains and runoff plays in the movement and distribution of PTEs in urban areas.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 125955"},"PeriodicalIF":7.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560830","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

Levels and transport behavior of ionic per- and polyfluoroalkyl substances in the atmosphere of urban pollution scenario: An in-situ investigation of a wastewater treatment plant in Wuxi, China

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-05 DOI: 10.1016/j.envpol.2025.126003

Yao Li , Xuhui Zhang , Lingling Xu , Limei Chen , Yukang Wu , Xinliang Ding , Pengfei Zhu , Wenjue Zhong

The levels of ionic per- and polyfluoroalkyl substances (iPFASs) in atmospheric particulate matter (PM_2.5), wastewater, and aqueous aerosol collected at a municipal WWTP in Wuxi were investigated. The concentration of Σ₂₀iPFASs in PM_2.5 collected from the WWTP (72.2 pg/m³, monthly average) was slightly higher than that from the control point (58.4 pg/m³). Furthermore, the HYSPLIT model implied that the iPFASs pathways of control point and WWTP were totally different under identical meteorological conditions and that WWTP could be a source of iPFASs in urban environment. A comparison of the levels and compositions of iPFASs in aeration tank wastewater (203 ± 118 ng/L), effluent (392 ± 145 ng/L), and aqueous aerosols (58.5 ± 11.7 ng/L) samples using the t-stochastic neighborhood embedding algorithm revealed similar pollution fingerprints in aqueous aerosols and aeration tank wastewater, which implied that aqueous aerosols could be originating from the aeration tanks of WWTP and that aqueous aerosols may serve as a carrier for the transport of iPFASs from wastewater to atmosphere. Forward trajectory analysis indicated that the priority contaminated areas were more than 200 km southeast of the WWTP source, suggesting that iPFASs emitted from the WWTP were likely to undergo long-range atmospheric transport after entering the atmosphere via aqueous aerosols.

{"title":"Levels and transport behavior of ionic per- and polyfluoroalkyl substances in the atmosphere of urban pollution scenario: An in-situ investigation of a wastewater treatment plant in Wuxi, China","authors":"Yao Li , Xuhui Zhang , Lingling Xu , Limei Chen , Yukang Wu , Xinliang Ding , Pengfei Zhu , Wenjue Zhong","doi":"10.1016/j.envpol.2025.126003","DOIUrl":"10.1016/j.envpol.2025.126003","url":null,"abstract":"<div><div>The levels of ionic per- and polyfluoroalkyl substances (iPFASs) in atmospheric particulate matter (PM<sub>2.5</sub>), wastewater, and aqueous aerosol collected at a municipal WWTP in Wuxi were investigated. The concentration of Σ<sub>20</sub>iPFASs in PM<sub>2.5</sub> collected from the WWTP (72.2 pg/m<sup>3</sup>, monthly average) was slightly higher than that from the control point (58.4 pg/m<sup>3</sup>). Furthermore, the HYSPLIT model implied that the iPFASs pathways of control point and WWTP were totally different under identical meteorological conditions and that WWTP could be a source of iPFASs in urban environment. A comparison of the levels and compositions of iPFASs in aeration tank wastewater (203 ± 118 ng/L), effluent (392 ± 145 ng/L), and aqueous aerosols (58.5 ± 11.7 ng/L) samples using the t-stochastic neighborhood embedding algorithm revealed similar pollution fingerprints in aqueous aerosols and aeration tank wastewater, which implied that aqueous aerosols could be originating from the aeration tanks of WWTP and that aqueous aerosols may serve as a carrier for the transport of iPFASs from wastewater to atmosphere. Forward trajectory analysis indicated that the priority contaminated areas were more than 200 km southeast of the WWTP source, suggesting that iPFASs emitted from the WWTP were likely to undergo long-range atmospheric transport after entering the atmosphere via aqueous aerosols.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 126003"},"PeriodicalIF":7.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561337","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

Dissolved organic matter mitigates the toxicity of silver nanoparticles to freshwater algae: Effects on oxidative stress and membrane function

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution

Pub Date : 2025-03-05 DOI: 10.1016/j.envpol.2025.125973

Jilai Zhang , Chenglei Hu , Ming Jiang , Qianqian Xiang , Sheng Wang , Youbo Su , Naiming Zhang , Zhihao Si , Yuning Mu , Ran Yang

The mechanisms underlying the destruction of cell membranes by silver nanoparticles (AgNPs) in the presence of dissolved organic matter (DOM) remain unclear despite extensive studies on the toxicity of AgNPs to the cell membranes of aquatic organisms. This study investigated the impact of dissolved humic acid (DHA) on the toxicity of AgNPs and silver ions (Ag⁺) to Chlorella vulgaris cell membranes. Specifically, this research examined the alterations in membrane lipid peroxidation, cell membrane permeability, fatty acid (FA) profiles, membrane fluidity, and ultrastructural changes in algal cells resulting from Ag⁺ and AgNPs, both in the absence and presence of DHA, as well as the potential cytoprotective effect of DHA. The results revealed that DHA promoted C. vulgaris growth, which increased the EC₅₀ of the AgNPs and Ag⁺ from 180 μg L⁻¹ to 722 μg L⁻¹ and 25 μg L⁻¹ to 193 μg L⁻¹, respectively. DHA addition significantly reduced algal membrane lipid peroxidation caused by Ag⁺ and AgNPs. Furthermore, DHA increased the permeability and potential of the algal cellular membranes, particularly in the presence of Ag⁺ and AgNPs. In the absence of DHA, both Ag⁺ and AgNPs significantly increased the relative content of saturated fatty acids (SFA), while decreasing the unsaturated fatty acids (UFA) levels (p < 0.05). Consequently, both forms of silver decreased the membrane fluidity of algal cells, which increased after adding DHA. Transmission electron microscopy (TEM) showed that the presence of DHA reduced cytoplasmic disintegration and vacuolization during exposure to Ag⁺ and AgNPs. These results suggest that DHA may regulate the FA composition of algal cell membranes, aiding C. vulgaris in maintaining membrane structure and function under the toxic stress induced by AgNPs and Ag⁺.

{"title":"Dissolved organic matter mitigates the toxicity of silver nanoparticles to freshwater algae: Effects on oxidative stress and membrane function","authors":"Jilai Zhang , Chenglei Hu , Ming Jiang , Qianqian Xiang , Sheng Wang , Youbo Su , Naiming Zhang , Zhihao Si , Yuning Mu , Ran Yang","doi":"10.1016/j.envpol.2025.125973","DOIUrl":"10.1016/j.envpol.2025.125973","url":null,"abstract":"<div><div>The mechanisms underlying the destruction of cell membranes by silver nanoparticles (AgNPs) in the presence of dissolved organic matter (DOM) remain unclear despite extensive studies on the toxicity of AgNPs to the cell membranes of aquatic organisms. This study investigated the impact of dissolved humic acid (DHA) on the toxicity of AgNPs and silver ions (Ag<sup>+</sup>) to <em>Chlorella vulgaris</em> cell membranes. Specifically, this research examined the alterations in membrane lipid peroxidation, cell membrane permeability, fatty acid (FA) profiles, membrane fluidity, and ultrastructural changes in algal cells resulting from Ag<sup>+</sup> and AgNPs, both in the absence and presence of DHA, as well as the potential cytoprotective effect of DHA. The results revealed that DHA promoted <em>C. vulgaris</em> growth, which increased the EC<sub>50</sub> of the AgNPs and Ag<sup>+</sup> from 180 μg L<sup>−1</sup> to 722 μg L<sup>−1</sup> and 25 μg L<sup>−1</sup> to 193 μg L<sup>−1</sup>, respectively. DHA addition significantly reduced algal membrane lipid peroxidation caused by Ag<sup>+</sup> and AgNPs. Furthermore, DHA increased the permeability and potential of the algal cellular membranes, particularly in the presence of Ag<sup>+</sup> and AgNPs. In the absence of DHA, both Ag<sup>+</sup> and AgNPs significantly increased the relative content of saturated fatty acids (SFA), while decreasing the unsaturated fatty acids (UFA) levels (<em>p</em> < 0.05). Consequently, both forms of silver decreased the membrane fluidity of algal cells, which increased after adding DHA. Transmission electron microscopy (TEM) showed that the presence of DHA reduced cytoplasmic disintegration and vacuolization during exposure to Ag<sup>+</sup> and AgNPs. These results suggest that DHA may regulate the FA composition of algal cell membranes, aiding <em>C. vulgaris</em> in maintaining membrane structure and function under the toxic stress induced by AgNPs and Ag<sup>+</sup>.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"372 ","pages":"Article 125973"},"PeriodicalIF":7.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143561335","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