Pub Date : 2026-01-01Epub Date: 2026-01-13DOI: 10.1016/j.enceco.2026.01.011
Jiapeng Yuan , Minggang Zheng , Fengmei Wang , Yiling Li , Aifeng Liu , Xinyu Li , Yitong Liu , Lei Shi , Ling Wang
Bisphenol A (BPA), a widely used chemical and known endocrine-disrupting chemical (EDC), has estrogen activity and the ability to migrate over long distances, which could pose a potential threat to polar ecosystems. This study examines the pollution levels, degradation mechanisms, and ecological risks of BPA and its analogs in the southeastern Arctic Ocean, focusing on the East Siberian and Chukchi Seas, through systematic sampling and analysis of seawater, suspended particulate matter (SPM), and sediment cores collected during the 2023 Arctic scientific cruise. BPA concentrations in surface seawater ranged from below the detection limit to 23.19 ng/L, with higher levels near the Beaufort Gyre. BPA levels in SPM (106.72–2864.50 ng/g dw) were significantly higher than in sediments (10.06–70.49 ng/g dw), identifying SPM as a primary transport vector. Sediment core analysis showed a historical rise in BPA deposition since the 1950s, aligning with the growth of BPA production industries. Ecological risk assessments using Risk Quotient (RQ) values indicated a high risk to marine organisms under current conditions, although lower-trophic-level species, such as Daphnia magna, showed increased vulnerability. This work offers essential data for understanding BPA's environmental fate in the Arctic Ocean and highlights the need for long-term monitoring and interdisciplinary research to address the ongoing presence and ecological risks of BPA amid its increasing global use.
{"title":"Multimedia distribution and ecological risks of bisphenol a in the Arctic Ocean: Insights from the east Siberian and Chukchi seas","authors":"Jiapeng Yuan , Minggang Zheng , Fengmei Wang , Yiling Li , Aifeng Liu , Xinyu Li , Yitong Liu , Lei Shi , Ling Wang","doi":"10.1016/j.enceco.2026.01.011","DOIUrl":"10.1016/j.enceco.2026.01.011","url":null,"abstract":"<div><div>Bisphenol A (BPA), a widely used chemical and known endocrine-disrupting chemical (EDC), has estrogen activity and the ability to migrate over long distances, which could pose a potential threat to polar ecosystems. This study examines the pollution levels, degradation mechanisms, and ecological risks of BPA and its analogs in the southeastern Arctic Ocean, focusing on the East Siberian and Chukchi Seas, through systematic sampling and analysis of seawater, suspended particulate matter (SPM), and sediment cores collected during the 2023 Arctic scientific cruise. BPA concentrations in surface seawater ranged from below the detection limit to 23.19 ng/L, with higher levels near the Beaufort Gyre. BPA levels in SPM (106.72–2864.50 ng/g dw) were significantly higher than in sediments (10.06–70.49 ng/g dw), identifying SPM as a primary transport vector. Sediment core analysis showed a historical rise in BPA deposition since the 1950s, aligning with the growth of BPA production industries. Ecological risk assessments using Risk Quotient (RQ) values indicated a high risk to marine organisms under current conditions, although lower-trophic-level species, such as <em>Daphnia magna</em>, showed increased vulnerability. This work offers essential data for understanding BPA's environmental fate in the Arctic Ocean and highlights the need for long-term monitoring and interdisciplinary research to address the ongoing presence and ecological risks of BPA amid its increasing global use.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 986-996"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-12-20DOI: 10.1016/j.enceco.2025.12.011
Jun Wang , Wenjun Wang , Yucheng Hou , Qian Li , Bin Gong , Miaomiao Qu , Yun Shi , Jianmeng Chen , Li’an Hou
Although the photothermal synergistic catalysis technology shows great potential for eliminating indoor volatile organic compounds (VOCs), its catalytic degradation of multi-component VOCs with different polarities still faces challenges such as insufficient catalytic oxidation performance and weak selective adsorption. This study innovatively utilized waste silk textiles as the sustainable carbon source to successfully synthesize a biochar-based transition metal oxide composite catalyst via an in-situ growth method, constructing the MnOx/C/TiO2 ternary composite catalyst. The experimental result demonstrated that the optimal catalyst (TSTMn-0.05) had remarkable synergistic removal efficiency for the mixed pollutant of CH2O and C7H8 under photothermal synergistic catalysis, and featured the degradation rates of 98.9 % and 85.2 % respectively within 90 min for CH2O and C7H8 Its excellent performance stems from the broad-spectrum adsorption and enrichment of various polar VOCs by the biochar matrix, the unique heterojunction structure of the catalyst, and the synergistic effect of the multivalent redox cycling of Mn ions and the photothermal effect. During the photothermal synergy process, multiple effects jointly promote the efficient separation of photogenerated carriers and the generation of a large number of reactive oxygen species (ROS), thereby driving the deep mineralization of VOCs. This study not only achieves the high-value resource utilization of waste textiles but also provides a new strategy for developing advanced photothermal catalysts capable of efficiently purifying complex and multi-component VOCs.
{"title":"In-situ synthesis of biochar-based transition metal oxide composite catalysts for highly photothermal oxidation single- and multi-component indoor VOCs","authors":"Jun Wang , Wenjun Wang , Yucheng Hou , Qian Li , Bin Gong , Miaomiao Qu , Yun Shi , Jianmeng Chen , Li’an Hou","doi":"10.1016/j.enceco.2025.12.011","DOIUrl":"10.1016/j.enceco.2025.12.011","url":null,"abstract":"<div><div>Although the photothermal synergistic catalysis technology shows great potential for eliminating indoor volatile organic compounds (VOCs), its catalytic degradation of multi-component VOCs with different polarities still faces challenges such as insufficient catalytic oxidation performance and weak selective adsorption. This study innovatively utilized waste silk textiles as the sustainable carbon source to successfully synthesize a biochar-based transition metal oxide composite catalyst via an in-situ growth method, constructing the MnO<sub>x</sub>/C/TiO<sub>2</sub> ternary composite catalyst. The experimental result demonstrated that the optimal catalyst (TSTMn-0.05) had remarkable synergistic removal efficiency for the mixed pollutant of CH<sub>2</sub>O and C<sub>7</sub>H<sub>8</sub> under photothermal synergistic catalysis, and featured the degradation rates of 98.9 % and 85.2 % respectively within 90 min for CH<sub>2</sub>O and C<sub>7</sub>H<sub>8</sub> Its excellent performance stems from the broad-spectrum adsorption and enrichment of various polar VOCs by the biochar matrix, the unique heterojunction structure of the catalyst, and the synergistic effect of the multivalent redox cycling of Mn ions and the photothermal effect. During the photothermal synergy process, multiple effects jointly promote the efficient separation of photogenerated carriers and the generation of a large number of reactive oxygen species (ROS), thereby driving the deep mineralization of VOCs. This study not only achieves the high-value resource utilization of waste textiles but also provides a new strategy for developing advanced photothermal catalysts capable of efficiently purifying complex and multi-component VOCs.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 652-668"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2026-02-01DOI: 10.1016/j.enceco.2026.01.029
Chengjie Shu , Wei Wang , Shengqi Cao , Beiwei Hou , Shunlin Gu , Lei Fu , Fenglun Zhang , Dayong Wang
In Caenorhabditis elegans, suppression in innate immunity could be induced by 6-PPD quinone (6-PPDQ); however, underlying mechanisms remain unknown. RNA interference (RNAi) of antimicrobial genes (lys-7 and spp-1) enhanced 6-PPDQ-induced lifespan reduction and increased 6-PPDQ accumulation. Accompanied with these, expressions of daf-16 encoding FOXO transcriptional factor and pmk-1 encoding p38 MAPK were decreased by 6-PPDQ exposure. In 6-PPDQ exposed nematodes, daf-16 and pmk-1 RNAi caused more severe inhibition in expression of antimicrobial genes. Additionally, 6-PPDQ caused lifespan reduction and 6-PPDQ accumulation were accelerated by daf-16 and pmk-1 RNAi. 6-PPDQ induced decrease in expression of antimicrobial genes and lifespan reduction and 6-PPDQ accumulation could be suppressed by pharmacological treatment with cuminaldehyde. Moreover, these beneficial effects of cuminaldehyde treatment were inhibited by daf-16 and pmk-1 RNAi, which further suggests crucial functions of DAF-16 and PMK-1. Our results highlight association of immunosuppression with 6-PPDQ-induced lifespan reduction, which was controlled by molecular signals of DAF-16 and PMK-1.
{"title":"6-PPD quinone induces lifespan reduction by causing immunosuppression via DAF-16/PMK-1 signaling in Caenorhabditis elegans","authors":"Chengjie Shu , Wei Wang , Shengqi Cao , Beiwei Hou , Shunlin Gu , Lei Fu , Fenglun Zhang , Dayong Wang","doi":"10.1016/j.enceco.2026.01.029","DOIUrl":"10.1016/j.enceco.2026.01.029","url":null,"abstract":"<div><div>In <em>Caenorhabditis elegans</em>, suppression in innate immunity could be induced by 6-PPD quinone (6-PPDQ); however, underlying mechanisms remain unknown. RNA interference (RNAi) of antimicrobial genes (<em>lys-7</em> and <em>spp-1</em>) enhanced 6-PPDQ-induced lifespan reduction and increased 6-PPDQ accumulation. Accompanied with these, expressions of <em>daf-16</em> encoding FOXO transcriptional factor and <em>pmk-1</em> encoding p38 MAPK were decreased by 6-PPDQ exposure. In 6-PPDQ exposed nematodes, <em>daf-16</em> and <em>pmk-1</em> RNAi caused more severe inhibition in expression of antimicrobial genes. Additionally, 6-PPDQ caused lifespan reduction and 6-PPDQ accumulation were accelerated by <em>daf-16</em> and <em>pmk-1</em> RNAi. 6-PPDQ induced decrease in expression of antimicrobial genes and lifespan reduction and 6-PPDQ accumulation could be suppressed by pharmacological treatment with cuminaldehyde. Moreover, these beneficial effects of cuminaldehyde treatment were inhibited by <em>daf-16</em> and <em>pmk-1</em> RNAi, which further suggests crucial functions of DAF-16 and PMK-1. Our results highlight association of immunosuppression with 6-PPDQ-induced lifespan reduction, which was controlled by molecular signals of DAF-16 and PMK-1.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 1176-1184"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-12-07DOI: 10.1016/j.enceco.2025.12.006
Sobarathne Senel Sanjaya , Wisurumuni Arachchilage Hasitha Maduranga Karunarathne , Jinkuk Park , Cheng-Yun Jin , Yung Hyun Choi , Gi-Young Kim
Polystyrene microplastics (PS-MPs), increasingly detected in aquatic environments, raise health concerns for humans and animals. However, their specific cellular effects remain incompletely characterized. This study identifies a mechanistic pathway by which PS-MPs impair osteogenic differentiation via organelle-specific stress responses in zebrafish larvae and MC3T3-E1 preosteoblasts. PS-MP exposure delayed vertebral mineralization and downregulation of key osteogenic makers. Mechanistically, PS-MPs were internalized through clathrin-mediated endocytosis, transported via the endo-lysosomal system, and accumulated within lysosomes. Lysosomal accumulation of PS-MPs induced lysosomal membrane permeabilization, indicated by increaed colocalization of galectin-3 and lysosomeassociated membrane protein 1, leading to oxidative stress. The resulting mitochondrial dysfunction included initial compensatory fusion responses, followed by impaired mitochondrial dynamics and suppressed mitochondrial biogenesis. These effects were accompanied by activation of PTEN-induced kinase 1/Parkin-mediated mitophagy and exacerbated lysomal stress. Notably, pharmacological activation of mammalian target of rapamycin (mTOR) signaling with MHY1485 restored mitochondrial abundance, upregulated peroxisome proliferator-activated receptor gamma coactivator 1-alpha, reduced mitophagy, and stabilized lysomal membrane integrity–without altering PS-MP uptake. Collectively, these findings reveal a novel organelle-to-organelle stress axis initiated by PS-MP exposure and suggest mTOR activation as a potential therapeutic approach to mitigate PS-MP-induced cellular dysfunction.
{"title":"Polystyrene microplastics disrupt osteogenic differentiation via lysosome-mediated mitochondrial dysfunction: Protective role of mTOR signaling","authors":"Sobarathne Senel Sanjaya , Wisurumuni Arachchilage Hasitha Maduranga Karunarathne , Jinkuk Park , Cheng-Yun Jin , Yung Hyun Choi , Gi-Young Kim","doi":"10.1016/j.enceco.2025.12.006","DOIUrl":"10.1016/j.enceco.2025.12.006","url":null,"abstract":"<div><div>Polystyrene microplastics (PS-MPs), increasingly detected in aquatic environments, raise health concerns for humans and animals. However, their specific cellular effects remain incompletely characterized. This study identifies a mechanistic pathway by which PS-MPs impair osteogenic differentiation via organelle-specific stress responses in zebrafish larvae and MC3T3-E1 preosteoblasts. PS-MP exposure delayed vertebral mineralization and downregulation of key osteogenic makers. Mechanistically, PS-MPs were internalized through clathrin-mediated endocytosis, transported via the <em>endo</em>-lysosomal system, and accumulated within lysosomes. Lysosomal accumulation of PS-MPs induced lysosomal membrane permeabilization, indicated by increaed colocalization of galectin-3 and lysosomeassociated membrane protein 1, leading to oxidative stress. The resulting mitochondrial dysfunction included initial compensatory fusion responses, followed by impaired mitochondrial dynamics and suppressed mitochondrial biogenesis. These effects were accompanied by activation of PTEN-induced kinase 1/Parkin-mediated mitophagy and exacerbated lysomal stress. Notably, pharmacological activation of mammalian target of rapamycin (mTOR) signaling with MHY1485 restored mitochondrial abundance, upregulated peroxisome proliferator-activated receptor gamma coactivator 1-alpha, reduced mitophagy, and stabilized lysomal membrane integrity–without altering PS-MP uptake. Collectively, these findings reveal a novel organelle-to-organelle stress axis initiated by PS-MP exposure and suggest mTOR activation as a potential therapeutic approach to mitigate PS-MP-induced cellular dysfunction.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 521-536"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liquid crystal monomers (LCMs) are emerging contaminants, yet evidence regarding their aquatic toxicity toward primary producers remains limited, particularly under co-exposure to plastic-derived dissolved organic matter (DOM). Here, we investigated the single and combined effects of LCMs and polyethylene-derived DOM (PE-DOM) on Chlorella vulgaris (C. vulgaris) during a 192-h exposure by integrating physiological responses, LCM bioaccumulation, and untargeted metabolomics. LCM exposure led to quantifiable accumulation, thereby inducing oxidative and metabolic stress in C. vulgaris. The resulting antioxidant activation and resource reallocation toward defense came at the expense of growth and photosynthetic capacity. Under co-exposure, lower PE-DOM loading, corresponding to limited inputs of chemically reactive fractions, did not affect LCM bioaccumulation but partially buffered LCM-induced physiological impairment via enhanced antioxidant defenses and coordinated metabolic compensation. In contrast, increasing PE-DOM loadings reduced early LCM accumulation yet amplified oxidative damage, accompanied by antioxidant defense collapse, broad metabolic dysregulation, and aggravated cellular damage. These results indicate that PE-DOM modulates LCM-induced biological outcomes through loading-driven shifts in algal metabolic plasticity. Taken together, our findings suggest that LCM aquatic toxicity may vary across plastic-impacted environments, highlighting the importance of considering plastic-derived DOM in aquatic risk assessments of LCMs.
{"title":"Plastic-derived dissolved organic matter modulates liquid crystal monomer toxicity in Chlorella vulgaris via metabolic plasticity","authors":"Shuting Fang , Yiquan Huang , Changqing Yao , Baohua Huang , Chao Chen , Qijun Ruan , Shuqin Liu , Gangfeng Ouyang","doi":"10.1016/j.enceco.2026.01.028","DOIUrl":"10.1016/j.enceco.2026.01.028","url":null,"abstract":"<div><div>Liquid crystal monomers (LCMs) are emerging contaminants, yet evidence regarding their aquatic toxicity toward primary producers remains limited, particularly under co-exposure to plastic-derived dissolved organic matter (DOM). Here, we investigated the single and combined effects of LCMs and polyethylene-derived DOM (PE-DOM) on <em>Chlorella vulgaris</em> (<em>C. vulgaris</em>) during a 192-h exposure by integrating physiological responses, LCM bioaccumulation, and untargeted metabolomics. LCM exposure led to quantifiable accumulation, thereby inducing oxidative and metabolic stress in <em>C. vulgaris.</em> The resulting antioxidant activation and resource reallocation toward defense came at the expense of growth and photosynthetic capacity. Under co-exposure, lower PE-DOM loading, corresponding to limited inputs of chemically reactive fractions, did not affect LCM bioaccumulation but partially buffered LCM-induced physiological impairment via enhanced antioxidant defenses and coordinated metabolic compensation. In contrast, increasing PE-DOM loadings reduced early LCM accumulation yet amplified oxidative damage, accompanied by antioxidant defense collapse, broad metabolic dysregulation, and aggravated cellular damage. These results indicate that PE-DOM modulates LCM-induced biological outcomes through loading-driven shifts in algal metabolic plasticity. Taken together, our findings suggest that LCM aquatic toxicity may vary across plastic-impacted environments, highlighting the importance of considering plastic-derived DOM in aquatic risk assessments of LCMs.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 1185-1194"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-12-29DOI: 10.1016/j.enceco.2025.12.026
Marina Aliste , Caridad Ros , Isabel Garrido , Carmen María Martínez , Adriana Fuensanta Esteban , María Ángeles Hernández , Fulgencio Contreras , Pilar Flores , Pilar Hellín , José Fenoll
The dual use of rotation crops for suppressing Meloidogyne incognita (M. incognita) and their residues as organic matter amendments for pesticide remediation via biosolarization was investigated. Four plant species (mustard, radish, red clover, and sorghum) were evaluated for their response to M. incognita under controlled conditions using clay loam soil, with pepper as a susceptible control. Radish and sorghum exhibited low gall index and reproduction factor, indicating potential resistance or tolerance to root-knot nematodes (RKN). Fresh residues of these four species were also incorporated into historically contaminated agricultural soil at 5 % and 10 % (w/w) rates and subjected to biosolarization for 90 days under polyethylene covers. Soil temperature and physicochemical properties were monitored, and pesticide dissipation was assessed over time. In this soil, 15 pesticides were detected, with a cumulative concentration of 2.6 mg kg−1. Biosolarization treatments enhanced pesticide dissipation compared to solarization alone and untreated control, with half-lives ranging from 52 to 120 days. Amendment type and rate influenced degradation efficiency, with low C/N ratio residues (mustard, radish, red clover) showing greater enhancement than high C/N ratio (sorghum). Higher amendment rates (10 % w/w) of radish and red clover significantly improved dissipation. In contrast to previous biosolarization studies that focused primarily on pathogen or pesticide control using conventional organic matter amendments (e.g., composts, manures, or agro-industrial wastes), this study demonstrates the use of rotation crop residues (selected for their nematode-suppressive potential) as functional biosolarization amendments. This integrated strategy links biological pest management with pesticide remediation, advancing the concept of biosolarization toward a more holistic and sustainable soil health approach.
{"title":"Dual benefits of rotation crops: Root nematode suppression and pesticide remediation through biosolarization","authors":"Marina Aliste , Caridad Ros , Isabel Garrido , Carmen María Martínez , Adriana Fuensanta Esteban , María Ángeles Hernández , Fulgencio Contreras , Pilar Flores , Pilar Hellín , José Fenoll","doi":"10.1016/j.enceco.2025.12.026","DOIUrl":"10.1016/j.enceco.2025.12.026","url":null,"abstract":"<div><div>The dual use of rotation crops for suppressing <em>Meloidogyne incognita</em> (<em>M. incognita)</em> and their residues as organic matter amendments for pesticide remediation via biosolarization was investigated. Four plant species (mustard, radish, red clover, and sorghum) were evaluated for their response to <em>M. incognita</em> under controlled conditions using clay loam soil, with pepper as a susceptible control. Radish and sorghum exhibited low gall index and reproduction factor, indicating potential resistance or tolerance to root-knot nematodes (RKN). Fresh residues of these four species were also incorporated into historically contaminated agricultural soil at 5 % and 10 % (<em>w</em>/w) rates and subjected to biosolarization for 90 days under polyethylene covers. Soil temperature and physicochemical properties were monitored, and pesticide dissipation was assessed over time. In this soil, 15 pesticides were detected, with a cumulative concentration of 2.6 mg kg<sup>−1</sup>. Biosolarization treatments enhanced pesticide dissipation compared to solarization alone and untreated control, with half-lives ranging from 52 to 120 days. Amendment type and rate influenced degradation efficiency, with low C/N ratio residues (mustard, radish, red clover) showing greater enhancement than high C/N ratio (sorghum). Higher amendment rates (10 % <em>w</em>/w) of radish and red clover significantly improved dissipation. In contrast to previous biosolarization studies that focused primarily on pathogen or pesticide control using conventional organic matter amendments (e.g., composts, manures, or agro-industrial wastes), this study demonstrates the use of rotation crop residues (selected for their nematode-suppressive potential) as functional biosolarization amendments. This integrated strategy links biological pest management with pesticide remediation, advancing the concept of biosolarization toward a more holistic and sustainable soil health approach.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 770-779"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-12-30DOI: 10.1016/j.enceco.2025.12.030
Zipei Dong , Wen-Xiong Wang
Micro(nano)plastic (MNP) pollution in the ocean raises concerns about their ecological risks. This study investigated the responses of gut and fecal microbiomes of a marine copepod Calanus sinicus to MNP exposure. Using aggregation-induced emission luminogen bacterial probes, we first visualized and quantified the bacterial distribution and abundance changes in copepod gut and fecal pellets following 200 μg/L of MP (5 μm) and NP (50 nm) exposure. Results revealed bacterial colonization in the anterior midgut, but MNPs induced significant increase in gut bacteria with a shift in gut/fecal balance. Specifically, the average fluorescence intensity of gut bacterial clusters increased by 51.8 % and 74.4 %, and conversely fecal bacterial abundance reduced by 41.4 % and 52.0 %, upon MP and NP exposure, respectively. Metagenomic sequencing revealed that MNP exposure resulted in reduced community diversity of fecal microbiome, characterized by decreased core groups and enriched plastic-associated genera. The most abundant Pseudophaeobacter decreased by 18.7–20.5 % under MNP exposure. Short-term MNP exposure had no major impact on KEGG pathways and CAZy classes, but significantly upregulated the MNP degradation-related functions, also disrupted the key genes involved in metabolism, oxidative stress, and biofilm formation. These findings provide key insights for the disturbance posed by MNPs to copepod guts and fecal microbiota.
{"title":"Gut and fecal microbial community responses of a marine copepod to micro(nano)plastics","authors":"Zipei Dong , Wen-Xiong Wang","doi":"10.1016/j.enceco.2025.12.030","DOIUrl":"10.1016/j.enceco.2025.12.030","url":null,"abstract":"<div><div>Micro(nano)plastic (MNP) pollution in the ocean raises concerns about their ecological risks. This study investigated the responses of gut and fecal microbiomes of a marine copepod <em>Calanus sinicus</em> to MNP exposure. Using aggregation-induced emission luminogen bacterial probes, we first visualized and quantified the bacterial distribution and abundance changes in copepod gut and fecal pellets following 200 μg/L of MP (5 μm) and NP (50 nm) exposure. Results revealed bacterial colonization in the anterior midgut, but MNPs induced significant increase in gut bacteria with a shift in gut/fecal balance. Specifically, the average fluorescence intensity of gut bacterial clusters increased by 51.8 % and 74.4 %, and conversely fecal bacterial abundance reduced by 41.4 % and 52.0 %, upon MP and NP exposure, respectively. Metagenomic sequencing revealed that MNP exposure resulted in reduced community diversity of fecal microbiome, characterized by decreased core groups and enriched plastic-associated genera. The most abundant <em>Pseudophaeobacter</em> decreased by 18.7–20.5 % under MNP exposure. Short-term MNP exposure had no major impact on KEGG pathways and CAZy classes, but significantly upregulated the MNP degradation-related functions, also disrupted the key genes involved in metabolism, oxidative stress, and biofilm formation. These findings provide key insights for the disturbance posed by MNPs to copepod guts and fecal microbiota.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 760-769"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-11-07DOI: 10.1016/j.enceco.2025.11.005
Carla Patinha , Carlos Silva , Rodrigo Neves , Pedro Pato , Solange Magalhães , Isabel Lopes , Cátia Venâncio
Water hyacinth (WH) is an invasive aquatic species for which no universal biomass management strategy exists, although many developing countries use it in agriculture with limited understanding of its potential environmental impacts. As WH is an effective bioaccumulator it is essential to assess its composition and quantify potentially harmful elements before this surplus green biomass can be effectively valorised. Determining the thresholds for their effects is crucial to define safe and sustainable uses. In this context, this study characterized WH biomass from six Portuguese locations (four northern and two southern), focusing on nutrient and potentially toxic element (PTE) profiles, sugar, protein, and structural composition. Furthermore, the ecotoxicological profile of aqueous extracts from each WH biomass was evaluated using several freshwater species (Raphidocelis subcapitata, Brachionus calyciflorus, Daphnia magna, and Danio rerio) and multiple endpoints, to benchmark safe agricultural application rates. Structural analysis revealed tissue type (leaves, floaters, roots) had greater influence than sampling location, with roots showing highest absorbance linked to lignin, proteins, and cellulose. These wall components provide metal-binding sites, explaining root PTE levels being higher than other tissues. Elemental composition showed high primary nutrients (e.g., potassium, phosphorus), meeting EU requirements for organic soil improvers (EU Regulation 2019/1009). Whole-plant WH water extracts had high conductivity (≥ 6.98 mS/cm), nutrient and PTE concentrations, and caused adverse effects on all aquatic species. No clear toxicity ranking emerged, though Bico and Pateira extracts were least toxic, and Sorraia extract most severe (algal inhibition, zooplankton mortality, zebrafish effects at 0.78 % dilution). The findings indicate that WH biomass incorporation into soils should be considered on a site-specific basis, owing to variations in PTEs accumulation across locations, requiring contaminant screening and regulatory guidance before large-scale use. The results evidenced multispecies, multi-endpoint ecotoxicity that might justify the need for dilution strategies and controlled application rates of WH biomass on soils to minimize putative downstream impacts.
{"title":"Water hyacinth (Eichhornia crassipes) biomass characterization for a potential exploration as an agriculture soil enhancer: Linking multi-location biogeochemical profiles to ecotoxicological safety","authors":"Carla Patinha , Carlos Silva , Rodrigo Neves , Pedro Pato , Solange Magalhães , Isabel Lopes , Cátia Venâncio","doi":"10.1016/j.enceco.2025.11.005","DOIUrl":"10.1016/j.enceco.2025.11.005","url":null,"abstract":"<div><div>Water hyacinth (WH) is an invasive aquatic species for which no universal biomass management strategy exists, although many developing countries use it in agriculture with limited understanding of its potential environmental impacts. As WH is an effective bioaccumulator it is essential to assess its composition and quantify potentially harmful elements before this surplus green biomass can be effectively valorised. Determining the thresholds for their effects is crucial to define safe and sustainable uses. In this context, this study characterized WH biomass from six Portuguese locations (four northern and two southern), focusing on nutrient and potentially toxic element (PTE) profiles, sugar, protein, and structural composition. Furthermore, the ecotoxicological profile of aqueous extracts from each WH biomass was evaluated using several freshwater species (<em>Raphidocelis subcapitata, Brachionus calyciflorus, Daphnia magna,</em> and <em>Danio rerio</em>) and multiple endpoints, to benchmark safe agricultural application rates. Structural analysis revealed tissue type (leaves, floaters, roots) had greater influence than sampling location, with roots showing highest absorbance linked to lignin, proteins, and cellulose. These wall components provide metal-binding sites, explaining root PTE levels being higher than other tissues. Elemental composition showed high primary nutrients (e.g., potassium, phosphorus), meeting EU requirements for organic soil improvers (EU Regulation 2019/1009). Whole-plant WH water extracts had high conductivity (≥ 6.98 mS/cm), nutrient and PTE concentrations, and caused adverse effects on all aquatic species. No clear toxicity ranking emerged, though Bico and Pateira extracts were least toxic, and Sorraia extract most severe (algal inhibition, zooplankton mortality, zebrafish effects at 0.78 % dilution). The findings indicate that WH biomass incorporation into soils should be considered on a site-specific basis, owing to variations in PTEs accumulation across locations, requiring contaminant screening and regulatory guidance before large-scale use. The results evidenced multispecies, multi-endpoint ecotoxicity that might justify the need for dilution strategies and controlled application rates of WH biomass on soils to minimize putative downstream impacts.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 101-111"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145520937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2026-01-09DOI: 10.1016/j.enceco.2026.01.002
Manyun Zhang , Negar Omidvar , Fang Wang , Xinhong Gan , Jinfei Wu , Ning Li , Wenyuan Zhang , Tao Guo
Unreasonable mining and excavation of rare earth caused considerable threats to agricultural production and local ecology. This study explored the optimized combination of chemical leaching, phytoremediation, organic amendment and nitrification inhibitors to decline lead (Pb) contents in mining-affected soils but to enhance soil ecosystem multifunctionality. In comparison to control (CK) in the citric acid-leaching group, soil available Pb contents were significantly decreased by 15.7%, 17.5% and 18.4% in the ryegrass + camellia shell (RS), ryegrass + camellia shell + nitrification inhibitor dicyandiamide (RSDC) and ryegrass + camellia shell + nitrification inhibitor 3, 4-dimethylpyrazole phosphate (RSDM) treatments, respectively. Meanwhile, soil Firmicute ratios of the RS, RSDC and RSDM treatments were higher than those in the CK treatments, indicating that an increase in soil Firmicute ratio could improve soil health. Co-presences of shell and nitrification inhibitor significantly increased the height and weight of ryegrass in the double-distilled water and citric acid-leaching groups, and they also promoted soil ecosystem multifunctionality notably. Although the ryegrass did not survive in the citric acid and EDTA-2Na + citric acid-leaching groups, the shell amendment and nitrification inhibitor additions notably improved soil Shannon diversity indices and biotic community network stabilities. Soil pH, β-glucosidase, urease, microbial community diversity, Firmicute and Actinobacteriota ratios were negatively related to soil available Pb contents. Our study indicated that the combination of citric acid-leaching + ryegrass + organic shell + DCD was an optimal strategy for decreasing heavy metal risks and enhancing soil ecosystem health in abandoned mining areas.
{"title":"Comprehensive chemical leaching, phytoremediation, organic amendment and nitrification inhibitor enhancing tailing soil remediation and ecosystem multifunctionality","authors":"Manyun Zhang , Negar Omidvar , Fang Wang , Xinhong Gan , Jinfei Wu , Ning Li , Wenyuan Zhang , Tao Guo","doi":"10.1016/j.enceco.2026.01.002","DOIUrl":"10.1016/j.enceco.2026.01.002","url":null,"abstract":"<div><div>Unreasonable mining and excavation of rare earth caused considerable threats to agricultural production and local ecology. This study explored the optimized combination of chemical leaching, phytoremediation, organic amendment and nitrification inhibitors to decline lead (Pb) contents in mining-affected soils but to enhance soil ecosystem multifunctionality. In comparison to control (CK) in the citric acid-leaching group, soil available Pb contents were significantly decreased by 15.7%, 17.5% and 18.4% in the ryegrass + <em>camellia</em> shell (RS), ryegrass + <em>camellia</em> shell + nitrification inhibitor dicyandiamide (RSDC) and ryegrass + <em>camellia</em> shell + nitrification inhibitor 3, 4-dimethylpyrazole phosphate (RSDM) treatments, respectively. Meanwhile, soil <em>Firmicute</em> ratios of the RS, RSDC and RSDM treatments were higher than those in the CK treatments, indicating that an increase in soil <em>Firmicute</em> ratio could improve soil health. Co-presences of shell and nitrification inhibitor significantly increased the height and weight of ryegrass in the double-distilled water and citric acid-leaching groups, and they also promoted soil ecosystem multifunctionality notably. Although the ryegrass did not survive in the citric acid and EDTA-2Na + citric acid-leaching groups, the shell amendment and nitrification inhibitor additions notably improved soil Shannon diversity indices and biotic community network stabilities. Soil pH, β-glucosidase, urease, microbial community diversity, <em>Firmicute</em> and <em>Actinobacteriota</em> ratios were negatively related to soil available Pb contents. Our study indicated that the combination of citric acid-leaching + ryegrass + organic shell + DCD was an optimal strategy for decreasing heavy metal risks and enhancing soil ecosystem health in abandoned mining areas.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 1015-1032"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146022770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-01Epub Date: 2025-12-24DOI: 10.1016/j.enceco.2025.12.022
Xiaohan Yin , Yijing Yang , Jianqiang Su , Yue Wu , Yuxuan Huang , Yongyu Li , Xinhong Wang
Pharmaceuticals and antibiotic resistance genes (ARGs) are increasingly recognized as emerging pollutants in coastal ecosystems, yet their contrasting behaviors in open straits versus semi-enclosed bays remain poorly understood. Here, we determined their concentrations across various sampling sites and seasons, together with mobile genetic elements (MGEs), in different water layers of the western Taiwan Strait and Dongshan Bay. In the Taiwan Strait, pharmaceutical concentrations were relatively low (0.60–81.20 ng/L), yet ocean currents may have played a pivotal role in redistributing both chemical and genetic pollutants. Despite the absence of corresponding antibiotics, multiple ARG classes (multidrug, aminoglycoside, MLSB) persisted, with strong correlations to transposase genes, underscoring the overlooked role of offshore waters as active reservoirs for horizontal gene transfer. In sharp contrast, Dongshan Bay—especially intensive aquaculture zones—exhibited substantially higher pharmaceutical levels (29.34–174.52 ng/L) and 74 ARGs dominated by multidrug resistance. Integrons (intI1) were tightly linked to diverse ARG classes, and ARG abundance correlated positively with antibiotic concentrations, directly implicating mariculture and terrestrial inputs as key drivers of resistance enrichment. Collectively, our findings reveal that semi-enclosed bays are vulnerable accumulators of anthropogenic contamination, while offshore straits serve as active pathways for pollutant redistribution and resistance propagation.
{"title":"A semi-enclosed bay as a pharmaceutical hotspot and an open strait as a regional reservoir: Contrasting pharmaceuticals and antibiotic resistance","authors":"Xiaohan Yin , Yijing Yang , Jianqiang Su , Yue Wu , Yuxuan Huang , Yongyu Li , Xinhong Wang","doi":"10.1016/j.enceco.2025.12.022","DOIUrl":"10.1016/j.enceco.2025.12.022","url":null,"abstract":"<div><div>Pharmaceuticals and antibiotic resistance genes (ARGs) are increasingly recognized as emerging pollutants in coastal ecosystems, yet their contrasting behaviors in open straits versus semi-enclosed bays remain poorly understood. Here, we determined their concentrations across various sampling sites and seasons, together with mobile genetic elements (MGEs), in different water layers of the western Taiwan Strait and Dongshan Bay. In the Taiwan Strait, pharmaceutical concentrations were relatively low (0.60–81.20 ng/L), yet ocean currents may have played a pivotal role in redistributing both chemical and genetic pollutants. Despite the absence of corresponding antibiotics, multiple ARG classes (multidrug, aminoglycoside, MLSB) persisted, with strong correlations to transposase genes, underscoring the overlooked role of offshore waters as active reservoirs for horizontal gene transfer. In sharp contrast, Dongshan Bay—especially intensive aquaculture zones—exhibited substantially higher pharmaceutical levels (29.34–174.52 ng/L) and 74 ARGs dominated by multidrug resistance. Integrons (<em>intI1</em>) were tightly linked to diverse ARG classes, and ARG abundance correlated positively with antibiotic concentrations, directly implicating mariculture and terrestrial inputs as key drivers of resistance enrichment. Collectively, our findings reveal that semi-enclosed bays are vulnerable accumulators of anthropogenic contamination, while offshore straits serve as active pathways for pollutant redistribution and resistance propagation.</div></div>","PeriodicalId":100480,"journal":{"name":"Environmental Chemistry and Ecotoxicology","volume":"8 ","pages":"Pages 738-748"},"PeriodicalIF":8.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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