Pub Date : 2024-11-22DOI: 10.1016/j.envpol.2024.125372
Tolulope Lawal, Timothy Jugovic, Griffin Josephs, Paul M. Zimmerman, Brian J. Love
Experimental efforts supplemented by modeling gauged whether common additives found in soaps and laundry detergents interfered with polyacrylate adhesive-based capture of microplastics. On the experimental front, poly(2-ethylhexyl acrylate) (PEHA) samples were evaluated using gravimetric analysis, probe tack, and functional assessments of adhesive-coated glass slides immersed into DI water solutions containing both microparticles and additives (solvents, softeners, and non-ionic surfactants). Nylon-6 spheres and polyethylene terephthalate microplastics were chosen for adsorption using a count-based method by ImageJ imaging analysis. Molecular dynamics computations simulated 2-ethyl-hexylacrylate (2-EHA) adhesive and microplastic interactions in the presence of water, citrate, glycerol and tergitol detergent additives. The experimental work showed that fewer microplastics were collected when tergitol was added and was in line with lower experimental Work of Adhesion (WoAaq) results for nylon and PETE (94.5% and 54.5% reductions respectively). Computational results also confirmed lower adhesion in the presence of tergitol. The experiments also showed that the adhesive swelled while equilibrating in additive solutions. Models suggested that tergitol most negatively impacted particle binding through a competitive “blocking” of the adhesive substrate while the other additives were less conclusive about potential interferences based on competitive binding.
{"title":"Surfactants can compete with microplastics for surfaces using adhesives as substrates for microplastic sequestration","authors":"Tolulope Lawal, Timothy Jugovic, Griffin Josephs, Paul M. Zimmerman, Brian J. Love","doi":"10.1016/j.envpol.2024.125372","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125372","url":null,"abstract":"Experimental efforts supplemented by modeling gauged whether common additives found in soaps and laundry detergents interfered with polyacrylate adhesive-based capture of microplastics. On the experimental front, poly(2-ethylhexyl acrylate) (PEHA) samples were evaluated using gravimetric analysis, probe tack, and functional assessments of adhesive-coated glass slides immersed into DI water solutions containing both microparticles and additives (solvents, softeners, and non-ionic surfactants). Nylon-6 spheres and polyethylene terephthalate microplastics were chosen for adsorption using a count-based method by ImageJ imaging analysis. Molecular dynamics computations simulated 2-ethyl-hexylacrylate (2-EHA) adhesive and microplastic interactions in the presence of water, citrate, glycerol and tergitol detergent additives. The experimental work showed that fewer microplastics were collected when tergitol was added and was in line with lower experimental Work of Adhesion (WoAaq) results for nylon and PETE (94.5% and 54.5% reductions respectively). Computational results also confirmed lower adhesion in the presence of tergitol. The experiments also showed that the adhesive swelled while equilibrating in additive solutions. Models suggested that tergitol most negatively impacted particle binding through a competitive “blocking” of the adhesive substrate while the other additives were less conclusive about potential interferences based on competitive binding.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"11 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684493","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}
The mass concentration of microplastics in stools and influencing factors remain unclear. The aim was to investigate the types and mass concentrations of microplastics in the stools of young college students and to explore potential influencing factors. Twenty-six participants were recruited from colleges in each city using stratified simple sampling, including Changsha, Shanghai, and Changchun. Participants’ dietary and fluid intake behavior was recorded using the 3-day 24-hour dietary questionnaire and the 7-day 24-hour fluid intake record, respectively. Lifestyle factor information related to microplastic exposure was collected through a microplastic exposure questionnaire. Stools were collected and detectd using pyrolysis gas chromatography–mass spectrometry (Py-GCMS) method. Eventually, 78 participants completed the study. The detection rate of microplastics, including polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP) and polyethylene terephthalate (PET), in stools was 98.7%, with a total mass concentration of 54.7 (10.1-102.7) μg/g. There were differences in the total mass concentrations of microplastics in the stools of participants in three cities, namely Changsha, Shanghai, and Changchun, which decreased sequentially (χ2=47.819, P<0.05). Participants with a relatively high frequency of takeaway food consumption had higher total mass concentrations of microplastics mass concentrations in stools (χ2=7.390, P<0.05). Participants with a relatively high frequency of consuming reheated food had a greater mass concentration of PET microplastics (χ2=6.117, P<0.05). The total mass concentration of microplastics, as well as the mass concentrations of PE, PVC, PP, and PA66, in the bottled water intake group were greater than those in the nonintake group (all P<0.05). Overall, the total mass concentration of microplastics in stools was related to residential city, consumption of reheated food, and bottled water intake (all P<0.05). Young college students generally experience microplastic exposure, with the main types being PE, PVC, PS, PP, PET, and PA66. Living location, reheated food consumption, and bottled water intake were factors influencing microplastic exposure.
{"title":"Microplastics in stools and their influencing factors among young adults from three cities in China: a multicenter cross-sectional study","authors":"Yongye Song, Jianfen Zhang, Xiuhua Shen, Lina Yang, Yong Jia, Fangfang Song, Yue Huang, Bingyue Han, Shuyi Zhou, Na Zhang, Guansheng Ma","doi":"10.1016/j.envpol.2024.125168","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125168","url":null,"abstract":"The mass concentration of microplastics in stools and influencing factors remain unclear. The aim was to investigate the types and mass concentrations of microplastics in the stools of young college students and to explore potential influencing factors. Twenty-six participants were recruited from colleges in each city using stratified simple sampling, including Changsha, Shanghai, and Changchun. Participants’ dietary and fluid intake behavior was recorded using the 3-day 24-hour dietary questionnaire and the 7-day 24-hour fluid intake record, respectively. Lifestyle factor information related to microplastic exposure was collected through a microplastic exposure questionnaire. Stools were collected and detectd using pyrolysis gas chromatography–mass spectrometry (Py-GCMS) method. Eventually, 78 participants completed the study. The detection rate of microplastics, including polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP) and polyethylene terephthalate (PET), in stools was 98.7%, with a total mass concentration of 54.7 (10.1-102.7) μg/g. There were differences in the total mass concentrations of microplastics in the stools of participants in three cities, namely Changsha, Shanghai, and Changchun, which decreased sequentially (χ<sup>2</sup>=47.819, <em>P</em><0.05). Participants with a relatively high frequency of takeaway food consumption had higher total mass concentrations of microplastics mass concentrations in stools (χ<sup>2</sup>=7.390, <em>P</em><0.05). Participants with a relatively high frequency of consuming reheated food had a greater mass concentration of PET microplastics (χ<sup>2</sup>=6.117, <em>P</em><0.05). The total mass concentration of microplastics, as well as the mass concentrations of PE, PVC, PP, and PA66, in the bottled water intake group were greater than those in the nonintake group (all <em>P</em><0.05). Overall, the total mass concentration of microplastics in stools was related to residential city, consumption of reheated food, and bottled water intake (all <em>P</em><0.05). Young college students generally experience microplastic exposure, with the main types being PE, PVC, PS, PP, PET, and PA66. Living location, reheated food consumption, and bottled water intake were factors influencing microplastic exposure.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"37 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684494","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}
Pub Date : 2024-11-22DOI: 10.1016/j.envpol.2024.125376
Shengxiang Yang, Bang Liu, Lu Wang, Robert Duran
Phytostabilization is an important way for the remediation of mine tailings, but the associated microbial processes and community succession remain largely unknown. In this study, we investigated the assembly mechanisms maintaining the core and satellite subcommunities diversity during phytostabilizaion of a mercury-rich mine tailings. The contents of total Hg and methylmercury decreased with a concomitant increase of total and available phosphorus content along the successive remediation stages. Microbial community composition, profiled by 16S rRNA gene sequencing, revealed amplicon sequence variants (ASVs) that were separated according to their abundance within either the core community (abundant ASVs) or the satellite community (rare ASVs). Community dynamics analysis showed that alpha diversity indices increased for the core community while decreased for the satellite community. Both satellite and core communities were mainly driven by stochastic drift process, and homogeneous selection was relatively higher in shaping the core community organization. The core community included ASVs affiliated to Proteobacteria, Crenarchaeota, Bacteroidota, Verrucomicrobiota, Acidobacteriota, and Myxococcota phyla, which were driven primarily by heterogeneous selection and drift. The satellite community included ASVs affiliated to Acidobacteriota, Ktedonobacteria, Anaerolineae and Verrucomicrobiota phyla, which were mainly influenced by heterogeneous selection. Nineteen taxa and one taxon were identified as keystone taxa for the satellite and core communities respectively. This study provides important insights on the assemble rules within the core and satellite communities, and theoretical guidance for further ecological restoration and management during microbial remediation of metal-mined derelict land.
{"title":"Dispatched microbial community assembly processes driving ecological succession during phytostabilization of mercury-rich tailings","authors":"Shengxiang Yang, Bang Liu, Lu Wang, Robert Duran","doi":"10.1016/j.envpol.2024.125376","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125376","url":null,"abstract":"Phytostabilization is an important way for the remediation of mine tailings, but the associated microbial processes and community succession remain largely unknown. In this study, we investigated the assembly mechanisms maintaining the core and satellite subcommunities diversity during phytostabilizaion of a mercury-rich mine tailings. The contents of total Hg and methylmercury decreased with a concomitant increase of total and available phosphorus content along the successive remediation stages. Microbial community composition, profiled by 16S rRNA gene sequencing, revealed amplicon sequence variants (ASVs) that were separated according to their abundance within either the core community (abundant ASVs) or the satellite community (rare ASVs). Community dynamics analysis showed that alpha diversity indices increased for the core community while decreased for the satellite community. Both satellite and core communities were mainly driven by stochastic drift process, and homogeneous selection was relatively higher in shaping the core community organization. The core community included ASVs affiliated to Proteobacteria, Crenarchaeota, Bacteroidota, Verrucomicrobiota, Acidobacteriota, and Myxococcota phyla, which were driven primarily by heterogeneous selection and drift. The satellite community included ASVs affiliated to Acidobacteriota, Ktedonobacteria, Anaerolineae and Verrucomicrobiota phyla, which were mainly influenced by heterogeneous selection. Nineteen taxa and one taxon were identified as keystone taxa for the satellite and core communities respectively. This study provides important insights on the assemble rules within the core and satellite communities, and theoretical guidance for further ecological restoration and management during microbial remediation of metal-mined derelict land.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"2 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690822","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}
Pub Date : 2024-11-22DOI: 10.1016/j.envpol.2024.125371
Ming Wei, Bing Wang, Miao Chen, Pan Wu, Xueyang Zhang
Antimony (Sb) mining and smelting activities caused Sb and arsenic (As) pollution in the soil, posing a threat to the ecosystem and human health. To remediate Sb and As in co-contaminated soil and realize the resource utilization of typical industrial solid waste, electrolytic manganese residue (EMR)-biochar composite (EB) was prepared from EMR and distillers grains by a facile one-step pyrolysis method. The immobilization effect of EB on Sb and As in soil was studied using a column leaching experiment. Pot and soil incubation experiments were conducted to investigate the effects of EB on the bioavailability of Sb/As and microbial communities. The results showed that 4 wt% EB treatment reduced the accumulated contents of Sb and As in leachates by 29.21%-55.65% and 53.51%-68.95%, respectively, compared with the control. EB treatment (1 wt%) improved plant height, root length, phytomass, and chlorophyll content of Brassica campestris L. Compared to the untreated soils, 4 wt% EB treatment increased the well-crystallized hydrous oxides and residual fractions of Sb and As by 4.29%-6.23% and 4.09%-7.03%, respectively. The concentrations of bioavailable Sb and As in soil were reduced by 48.01%-71.92% and 52.31%-53.81%, respectively. EB interacted with As/Sb-resistant dominant microorganisms such as Proteobacteria in the soil, promoted their growth, and enhanced the immobilization of Sb/As. EB increased the relative abundance of redox-related bacteria of Sb and As (Thiobacillus and Sulfuriferula) by affecting soil EC and bioavailable Sb/As. The immobilization of As and Sb by EB include complexation, hydrogen bonding, and pore filling. These findings provide novel insights into the remediation of Sb and As co-contaminated soils.
{"title":"Remediation of antimony and arsenic in co-contaminated soil by electrolytic manganese residue-biochar composite: Effects, mechanisms, and microbial response","authors":"Ming Wei, Bing Wang, Miao Chen, Pan Wu, Xueyang Zhang","doi":"10.1016/j.envpol.2024.125371","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125371","url":null,"abstract":"Antimony (Sb) mining and smelting activities caused Sb and arsenic (As) pollution in the soil, posing a threat to the ecosystem and human health. To remediate Sb and As in co-contaminated soil and realize the resource utilization of typical industrial solid waste, electrolytic manganese residue (EMR)-biochar composite (EB) was prepared from EMR and distillers grains by a facile one-step pyrolysis method. The immobilization effect of EB on Sb and As in soil was studied using a column leaching experiment. Pot and soil incubation experiments were conducted to investigate the effects of EB on the bioavailability of Sb/As and microbial communities. The results showed that 4 wt% EB treatment reduced the accumulated contents of Sb and As in leachates by 29.21%-55.65% and 53.51%-68.95%, respectively, compared with the control. EB treatment (1 wt%) improved plant height, root length, phytomass, and chlorophyll content of <em>Brassica campestris</em> L. Compared to the untreated soils, 4 wt% EB treatment increased the well-crystallized hydrous oxides and residual fractions of Sb and As by 4.29%-6.23% and 4.09%-7.03%, respectively. The concentrations of bioavailable Sb and As in soil were reduced by 48.01%-71.92% and 52.31%-53.81%, respectively. EB interacted with As/Sb-resistant dominant microorganisms such as <em>Proteobacteria</em> in the soil, promoted their growth, and enhanced the immobilization of Sb/As. EB increased the relative abundance of redox-related bacteria of Sb and As (<em>Thiobacillus</em> and <em>Sulfuriferula</em>) by affecting soil EC and bioavailable Sb/As. The immobilization of As and Sb by EB include complexation, hydrogen bonding, and pore filling. These findings provide novel insights into the remediation of Sb and As co-contaminated soils.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"10 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684489","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}
Pub Date : 2024-11-22DOI: 10.1016/j.envpol.2024.125379
Beatrice Sorrentino, Alessandro Anav, Vicent Calatayud, Alessio Collalti, Pierre Sicard, Stefan Leca, Francesca Fornasier, Elena Paoletti, Alessandra De Marco
Tropospheric ozone (O3) concentrations in the Northern Hemisphere have significantly increased since the pre-industrial era, with ongoing growth driven by emissions from industrial, agricultural, and transportation activities, further exacerbated by the warming temperatures and altered atmospheric circulation patterns associated with climate change. This study compared different methodologies for estimating biomass potential losses (BPL) in forests due to elevated O3 using both concentration-based (AOT40) and flux-based (POD1) metrics. Moreover, to further assess the impact of O3 on forest health and carbon uptake across the dominant forest types in the Northern Hemisphere, we also compared BPL estimates from dose-response functions with those derived from the process-based model ORCHIDEE .Our analysis showed that deciduous forests, particularly boreal and continental types, are more sensitive to O3-induced biomass loss compared to evergreen forests. Importantly, the study also revealed significant regional differences, with Europe and North America experiencing higher BPL than Asia and North Africa. Regression analysis between BPL and Gross Primary Production anomalies indicated that the relationship between O3 exposure and forest productivity varied across forest types, with continental deciduous forests showing stronger correlations. The findings highlighted the importance of using flux-based metrics like POD1 in assessing O3 impacts and that current dose-response functions may require further validation across diverse ecological settings to propose effective forest management and conservation strategies.
{"title":"Inconsistency between process-based model and dose-response function in estimating Biomass losses in Northern Hemisphere due to elevated O3","authors":"Beatrice Sorrentino, Alessandro Anav, Vicent Calatayud, Alessio Collalti, Pierre Sicard, Stefan Leca, Francesca Fornasier, Elena Paoletti, Alessandra De Marco","doi":"10.1016/j.envpol.2024.125379","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125379","url":null,"abstract":"Tropospheric ozone (O<sub>3</sub>) concentrations in the Northern Hemisphere have significantly increased since the pre-industrial era, with ongoing growth driven by emissions from industrial, agricultural, and transportation activities, further exacerbated by the warming temperatures and altered atmospheric circulation patterns associated with climate change. This study compared different methodologies for estimating biomass potential losses (BPL) in forests due to elevated O<sub>3</sub> using both concentration-based (AOT40) and flux-based (POD1) metrics. Moreover, to further assess the impact of O<sub>3</sub> on forest health and carbon uptake across the dominant forest types in the Northern Hemisphere, we also compared BPL estimates from dose-response functions with those derived from the process-based model ORCHIDEE .Our analysis showed that deciduous forests, particularly boreal and continental types, are more sensitive to O<sub>3</sub>-induced biomass loss compared to evergreen forests. Importantly, the study also revealed significant regional differences, with Europe and North America experiencing higher BPL than Asia and North Africa. Regression analysis between BPL and Gross Primary Production anomalies indicated that the relationship between O<sub>3</sub> exposure and forest productivity varied across forest types, with continental deciduous forests showing stronger correlations. The findings highlighted the importance of using flux-based metrics like POD1 in assessing O<sub>3</sub> impacts and that current dose-response functions may require further validation across diverse ecological settings to propose effective forest management and conservation strategies.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"34 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690821","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}
Pub Date : 2024-11-22DOI: 10.1016/j.envpol.2024.125381
Chun-Ying Chao, Wei Li, Philip K. Hopke, Fangzhou Guo, Yuxuan Wang, Robert J. Griffin
Local land-sea breezes play an important role in coastal air quality because they circulate air between coastal/urban and marine areas, potentially causing the accumulation of pollutants. This has been observed for the secondary photochemical pollutant ozone. However, particulate matter (PM) also warrants investigation. To understand the complicated interactions between coastal urban air quality and a local land-sea breeze, we analyzed historical monitoring data from Houston, Texas, which is the fourth most populous city in the United States. Using k-means clustering algorithms to analyze wind data from Houston, we successfully identified a sea breeze recirculation cluster. Additionally, we performed positive matrix factorization on PM2.5 (2.5 μm in diameter or less) composition data for 2010-2018 from Houston Deer Park #2 monitoring site, 5 km south of the industrialized Houston Ship Channel. The resulting eight factors indicated a variety of anthropogenic, natural, primary and secondary sources. Emphasizing the PM2.5 sources in each of the wind clusters for June, July, and August, we discovered that on southernly wind and sea breeze recirculation days, the PM2.5 concentrations are ∼30% higher than those under other wind patterns. Under southerly wind, 53% of PM2.5 was attributed to long-range transport of soil and 15% to aged and fresh sea salt. In contrast, on days identified as being impacted by a sea breeze, 60% of PM2.5 was attributed to anthropogenic emissions and only 15% to soil sources. Secondary organic aerosol from multiple sources also appeared to be important on sea breeze days.
{"title":"Increases in PM2.5 levels in Houston are associated with a highly recirculating sea breeze","authors":"Chun-Ying Chao, Wei Li, Philip K. Hopke, Fangzhou Guo, Yuxuan Wang, Robert J. Griffin","doi":"10.1016/j.envpol.2024.125381","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125381","url":null,"abstract":"Local land-sea breezes play an important role in coastal air quality because they circulate air between coastal/urban and marine areas, potentially causing the accumulation of pollutants. This has been observed for the secondary photochemical pollutant ozone. However, particulate matter (PM) also warrants investigation. To understand the complicated interactions between coastal urban air quality and a local land-sea breeze, we analyzed historical monitoring data from Houston, Texas, which is the fourth most populous city in the United States. Using k-means clustering algorithms to analyze wind data from Houston, we successfully identified a sea breeze recirculation cluster. Additionally, we performed positive matrix factorization on PM<sub>2.5</sub> (2.5 μm in diameter or less) composition data for 2010-2018 from Houston Deer Park #2 monitoring site, 5 km south of the industrialized Houston Ship Channel. The resulting eight factors indicated a variety of anthropogenic, natural, primary and secondary sources. Emphasizing the PM<sub>2.5</sub> sources in each of the wind clusters for June, July, and August, we discovered that on southernly wind and sea breeze recirculation days, the PM<sub>2.5</sub> concentrations are ∼30% higher than those under other wind patterns. Under southerly wind, 53% of PM<sub>2.5</sub> was attributed to long-range transport of soil and 15% to aged and fresh sea salt. In contrast, on days identified as being impacted by a sea breeze, 60% of PM<sub>2.5</sub> was attributed to anthropogenic emissions and only 15% to soil sources. Secondary organic aerosol from multiple sources also appeared to be important on sea breeze days.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"59 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690820","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}
Pub Date : 2024-11-21DOI: 10.1016/j.envpol.2024.125343
Sai Liu, Gang Wang, Fanhua Kong, Ziwei Huang, Na Zhao, Wenkang Gao
Elucidating the chemical composition, sources, and health risks of fine particulate matter (PM2.5) is crucial for effectively preventing and controlling air pollution. This study collected PM2.5 samples in Linyi from November 10, 2021, to October 15, 2022, spanning the period of the 2022 Winter Olympics and Paralympics. The analysis focused on seasonal variations in the chemical composition of PM2.5, including water-soluble ions, inorganic elements, and carbonaceous aerosols. Results from the random forest model indicated that control measures during the Olympics and Paralympics reduced PM2.5 concentrations by 21.5% in Linyi. Organic matter was the dominant component of PM2.5, followed by NO3–, SO42–, and NH4+. Among secondary inorganic ions, SO42– exhibited the highest concentration in summer, while NO3– and NH4+ showed the lowest concentrations. The inorganic elements S, K, Fe, and Si had high mean annual concentrations, underscoring the need for targeted control measures for plate production, bulk coal burning, and biomass combustion in Linyi. The organic carbon (OC) to elemental carbon ratio (17.7–20.5) in Linyi was high, highlighting the importance of addressing secondary OC pollution. According to the positive matrix factorization model, coal burning, and the secondary formation processes of sulfate and nitrate were the dominant sources of PM2.5. Backward air mass trajectories revealed substantial contributions from the southeastern, local, and southwestern regions of Linyi. This suggests the need for enhanced regional joint prevention and control efforts between Linyi and neighboring cities, such as Rizhao and Jining in Shandong Province, as well as northern cities in Jiangsu Province. The highest non-carcinogenic and carcinogenic risks (CRs) were associated with As. coal burning posed significant noncarcinogenic risks and a moderate CR, contributing 41.7% and 44.0% of the total health risk, respectively. These findings are crucial for developing effective air pollution prevention and control strategies.
{"title":"Chemical composition, multiple sources, and health risks of PM2.5: A case study in Linyi, China’s plate and logistics capital","authors":"Sai Liu, Gang Wang, Fanhua Kong, Ziwei Huang, Na Zhao, Wenkang Gao","doi":"10.1016/j.envpol.2024.125343","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125343","url":null,"abstract":"Elucidating the chemical composition, sources, and health risks of fine particulate matter (PM<sub>2.5</sub>) is crucial for effectively preventing and controlling air pollution. This study collected PM<sub>2.5</sub> samples in Linyi from November 10, 2021, to October 15, 2022, spanning the period of the 2022 Winter Olympics and Paralympics. The analysis focused on seasonal variations in the chemical composition of PM<sub>2.5</sub>, including water-soluble ions, inorganic elements, and carbonaceous aerosols. Results from the random forest model indicated that control measures during the Olympics and Paralympics reduced PM<sub>2.5</sub> concentrations by 21.5% in Linyi. Organic matter was the dominant component of PM<sub>2.5</sub>, followed by NO<sub>3</sub><sup>–</sup>, SO<sub>4</sub><sup>2–</sup>, and NH<sub>4</sub><sup>+</sup>. Among secondary inorganic ions, SO<sub>4</sub><sup>2–</sup> exhibited the highest concentration in summer, while NO<sub>3</sub><sup>–</sup> and NH<sub>4</sub><sup>+</sup> showed the lowest concentrations. The inorganic elements S, K, Fe, and Si had high mean annual concentrations, underscoring the need for targeted control measures for plate production, bulk coal burning, and biomass combustion in Linyi. The organic carbon (OC) to elemental carbon ratio (17.7–20.5) in Linyi was high, highlighting the importance of addressing secondary OC pollution. According to the positive matrix factorization model, coal burning, and the secondary formation processes of sulfate and nitrate were the dominant sources of PM<sub>2.5</sub>. Backward air mass trajectories revealed substantial contributions from the southeastern, local, and southwestern regions of Linyi. This suggests the need for enhanced regional joint prevention and control efforts between Linyi and neighboring cities, such as Rizhao and Jining in Shandong Province, as well as northern cities in Jiangsu Province. The highest non-carcinogenic and carcinogenic risks (CRs) were associated with As. coal burning posed significant noncarcinogenic risks and a moderate CR, contributing 41.7% and 44.0% of the total health risk, respectively. These findings are crucial for developing effective air pollution prevention and control strategies.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"14 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678490","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}
Pub Date : 2024-11-21DOI: 10.1016/j.envpol.2024.125344
Xingxing Ma, Hongnian Liu, Zhen Peng
Accurate predictions of atmospheric particulate matter can be applied in providing services for air pollution prevention and control. However, the forecasting accuracy of traditional air quality models is limited owing to model uncertainties. In this study, we developed a deep learning model, named multiscale depth-separable UNet (MDS-UNet), to improve PM2.5 and PM10 concentration forecasts from WRF_Chem over China. Results showed that MDS-UNet was able to capture the complex nonlinear errors between model predictions and observations, which was helpful in correcting the biases and spatiotemporal distribution patterns of PM2.5 and PM10 concentrations predicted by WRF_Chem. MDS-UNet made a better performance in the improvement of both PM2.5 and PM10 prediction accuracy than UNet and CNN during the 0-24 forecasts. Using MDS-UNet, the reductions in the root-mean-square error (RMSE) of the regionally averaged PM2.5 and PM10 concentration forecasts were 35.08% and 17.74%, respectively. During the 0–24-h forecast period, MDS-UNet performed well in terms of PM2.5 and PM10 over six key urban agglomerations in China. Taking a pollution process as a case study, results demonstrated that, compared with WRF_Chem, MDS-UNet was able to make the best improvement in YRD, the Sichuan Basin, and central China, with reductions in the RMSE of the PM2.5 forecasts of 55.22%, 55.53%, and 52.17%, respectively; and for PM10 forecasts these reductions were 44.90%, 40.97%, and 46.79%, respectively. Through this analysis, it was apparent that MDS-UNet demonstrated a better effect in terms of improving both PM2.5 and PM10 predictions in these key urban agglomerations during an important pollution process.
{"title":"Improving PM2.5 and PM10 predictions in China from WRF_Chem through a deep learning method: multiscale depth-separable UNet","authors":"Xingxing Ma, Hongnian Liu, Zhen Peng","doi":"10.1016/j.envpol.2024.125344","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125344","url":null,"abstract":"Accurate predictions of atmospheric particulate matter can be applied in providing services for air pollution prevention and control. However, the forecasting accuracy of traditional air quality models is limited owing to model uncertainties. In this study, we developed a deep learning model, named multiscale depth-separable UNet (MDS-UNet), to improve PM<sub>2.5</sub> and PM<sub>10</sub> concentration forecasts from WRF_Chem over China. Results showed that MDS-UNet was able to capture the complex nonlinear errors between model predictions and observations, which was helpful in correcting the biases and spatiotemporal distribution patterns of PM<sub>2.5</sub> and PM<sub>10</sub> concentrations predicted by WRF_Chem. MDS-UNet made a better performance in the improvement of both PM<sub>2.5</sub> and PM<sub>10</sub> prediction accuracy than UNet and CNN during the 0-24 forecasts. Using MDS-UNet, the reductions in the root-mean-square error (RMSE) of the regionally averaged PM<sub>2.5</sub> and PM<sub>10</sub> concentration forecasts were 35.08% and 17.74%, respectively. During the 0–24-h forecast period, MDS-UNet performed well in terms of PM<sub>2.5</sub> and PM<sub>10</sub> over six key urban agglomerations in China. Taking a pollution process as a case study, results demonstrated that, compared with WRF_Chem, MDS-UNet was able to make the best improvement in YRD, the Sichuan Basin, and central China, with reductions in the RMSE of the PM<sub>2.5</sub> forecasts of 55.22%, 55.53%, and 52.17%, respectively; and for PM<sub>10</sub> forecasts these reductions were 44.90%, 40.97%, and 46.79%, respectively. Through this analysis, it was apparent that MDS-UNet demonstrated a better effect in terms of improving both PM<sub>2.5</sub> and PM<sub>10</sub> predictions in these key urban agglomerations during an important pollution process.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"26 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678493","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}
Microplastics (MPs) have emerged as hazardous substances, eliciting widespread concern regarding their potential toxicity. Although our previous research has indicated that polystyrene MPs (PS-MPs) might cause male reproductive toxicity in mammals, their precise effects on sperm motility parameters and acrosomal development remain uncertain. Herein, the effects on sperm motility of PS-MPs at varied particle sizes (0.5 μm, 4 μm and 10 μm) and the underlying mechanisms were examined. The results revealed that PS-MPs caused a decrease in sperm motility, accompanied by abnormalities in the structure and function of the sperm acrosome. Meanwhile, PS-MPs triggered the elevation of intracellular reactive oxygen species levels and the abnormal expression of antioxidant enzymes (γH2AX, GPX4, Peroxiredoxin 5 and SDHB), indicating disruption of the sperm antioxidant system. Furthermore, we observed aberrant expression of key factors involved in mitochondrial fission/fusion (Drp1, Fis1, Mfn1, Mfn2) and biogenesis (Tfam, Nrf1, Pgc1α), potentially resulting in disrupted mitochondrial dynamics and biogenesis in mice testis and Sertoli cells exposed to PS-MPs. Additionally, PS-MPs induced mitochondrial dysfunction by regulating the Sirt1-Pgc1α signaling pathway. Our data provided novel insights into potential mechanisms underlying the spermatogenesis disorders triggered by PS-MPs.
{"title":"Polystyrene microplastics induced spermatogenesis disorder via disrupting mitochondrial function through the regulation of the Sirt1-Pgc1α signaling pathway in male mice","authors":"Haibo Jin, Bowen Xue, Xuefang Chen, Tan Ma, Yonggang Ma, Hui Zou, Jiaqiao Zhu, Xishuai Tong, Ruilong Song, Weiqian Meng, Zongping Liu","doi":"10.1016/j.envpol.2024.125364","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125364","url":null,"abstract":"Microplastics (MPs) have emerged as hazardous substances, eliciting widespread concern regarding their potential toxicity. Although our previous research has indicated that polystyrene MPs (PS-MPs) might cause male reproductive toxicity in mammals, their precise effects on sperm motility parameters and acrosomal development remain uncertain. Herein, the effects on sperm motility of PS-MPs at varied particle sizes (0.5 μm, 4 μm and 10 μm) and the underlying mechanisms were examined. The results revealed that PS-MPs caused a decrease in sperm motility, accompanied by abnormalities in the structure and function of the sperm acrosome. Meanwhile, PS-MPs triggered the elevation of intracellular reactive oxygen species levels and the abnormal expression of antioxidant enzymes (γH2AX, GPX4, Peroxiredoxin 5 and SDHB), indicating disruption of the sperm antioxidant system. Furthermore, we observed aberrant expression of key factors involved in mitochondrial fission/fusion (Drp1, Fis1, Mfn1, Mfn2) and biogenesis (Tfam, Nrf1, Pgc1α), potentially resulting in disrupted mitochondrial dynamics and biogenesis in mice testis and Sertoli cells exposed to PS-MPs. Additionally, PS-MPs induced mitochondrial dysfunction by regulating the Sirt1-Pgc1α signaling pathway. Our data provided novel insights into potential mechanisms underlying the spermatogenesis disorders triggered by PS-MPs.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"57 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678494","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}
Pub Date : 2024-11-20DOI: 10.1016/j.envpol.2024.125347
Benjamin CT. Gray, Curtis Champion, Matt K. Broadhurst, Melinda A. Coleman, Kirsten Benkendorff
Contaminants are transported into estuaries during rainfall events, impacting the physiology of harvested species, and thereby threatening fisheries sustainability. Decapod crustaceans are among the most economically important groups harvested from estuaries, but are at high risk of contaminant exposure. We conducted a systematic review and meta-analysis evaluating the physiological responses of harvested estuarine decapods to contaminants and flooding. A total of 138 research articles were identified, with global research effort corresponding to the geographic distribution of crustacean harvesting. From these studies, 305 acute toxicity values for metals and pesticide chemical classes were extracted and 341 sublethal effect sizes (log-response ratios; LnRRs) calculated using 91 physiological measures across seven response categories. At sublethal environmentally relevant concentrations, exposure to various metals, pesticide chemical classes and polycyclic aromatic hydrocarbons consistently elicited negative effects on decapod physiology (LnRR range: –0.67 to –0.07). Key physiological processes impacted by contaminant exposure included nutritional condition, osmoregulation, oxidative stress defences, acetylcholinesterase activity, metabolism and growth (LnRR range: –0.73 to –0.1), with a general trend for greater effects later in ontogeny. With new agricultural and industrial chemicals continually being marketed, our meta-analysis highlights the need for regulatory testing on harvested species prior to registration for use in catchment areas. Under future climatic variability, harvested estuarine decapods may be increasingly exposed to contaminants, with implications for fisheries and global food security.
{"title":"Effects of contaminants and flooding on the physiology of harvested estuarine decapod crustaceans: A global review and meta-analysis","authors":"Benjamin CT. Gray, Curtis Champion, Matt K. Broadhurst, Melinda A. Coleman, Kirsten Benkendorff","doi":"10.1016/j.envpol.2024.125347","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125347","url":null,"abstract":"Contaminants are transported into estuaries during rainfall events, impacting the physiology of harvested species, and thereby threatening fisheries sustainability. Decapod crustaceans are among the most economically important groups harvested from estuaries, but are at high risk of contaminant exposure. We conducted a systematic review and meta-analysis evaluating the physiological responses of harvested estuarine decapods to contaminants and flooding. A total of 138 research articles were identified, with global research effort corresponding to the geographic distribution of crustacean harvesting. From these studies, 305 acute toxicity values for metals and pesticide chemical classes were extracted and 341 sublethal effect sizes (log-response ratios; LnRRs) calculated using 91 physiological measures across seven response categories. At sublethal environmentally relevant concentrations, exposure to various metals, pesticide chemical classes and polycyclic aromatic hydrocarbons consistently elicited negative effects on decapod physiology (LnRR range: –0.67 to –0.07). Key physiological processes impacted by contaminant exposure included nutritional condition, osmoregulation, oxidative stress defences, acetylcholinesterase activity, metabolism and growth (LnRR range: –0.73 to –0.1), with a general trend for greater effects later in ontogeny. With new agricultural and industrial chemicals continually being marketed, our meta-analysis highlights the need for regulatory testing on harvested species prior to registration for use in catchment areas. Under future climatic variability, harvested estuarine decapods may be increasingly exposed to contaminants, with implications for fisheries and global food security.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"1 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678495","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}
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