Environment International最新文献

{"title":"Development and evaluation of rapid, national-scale outdoor air pollution modelling and exposure assessment: Hybrid air dispersion exposure system (HADES)","authors":"Calvin Jephcote, John Gulliver","doi":"10.1016/j.envint.2025.109304","DOIUrl":"https://doi.org/10.1016/j.envint.2025.109304","url":null,"abstract":"Improvements in computer processing power are facilitating the development of more detailed environmental models with greater geographical coverage. We developed a national-scale model of outdoor air pollution (<u>H</u>ybrid <u>A</u>ir <u>D</u>ispersion <u>E</u>xposure <u>S</u>ystem − HADES) for rapid production of concentration maps of nitrogen dioxide (NO₂) and ozone (O₃) at very high spatial resolution (10 m). The model combines dispersion modelling with satellite-derived estimates of background concentrations, land cover, and a 3-D representation of buildings, in a statistical calibration framework. We developed an emissions inventory covering England and Wales to implement the model and tested its performance using concentration data for the years 2018–2019 from fixed-site monitoring locations. In 10,000 Monte Carlo cross-validation iterations, hourly-annual average R² values for NO₂ were 0.77–0.79 (RMSE: root mean squared error of 5.3–5.7 µg/m³), and 0.87–0.89 for O₃ (RMSE = 3.6–3.8 µg/m³) at the 95 % confidence interval. The annual average R² was 0.80 for NO₂ (RMSE = 4.9 µg/m³) and 0.86 for O₃ (RMSE = 3.2 µg/m³) from aggregating the hourly-annual estimates. The air pollution surfaces are freely available for non-commercial use. In using these surfaces for exposure assessment, all residential locations, and neighbourhoods in urban areas, are unlikely to be below the 2021 World Health Organisation Air Quality Guidelines threshold (10 µg/m³) for annual average concentrations of NO₂; especially rural and suburban area in some regions are also likely to exceed the threshold for 8-hour daily maximum O₃ concentrations (60 µg/m³).","PeriodicalId":308,"journal":{"name":"Environment International","volume":"114 1","pages":""},"PeriodicalIF":11.8,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Systematic Review on RF-EMF Exposure and Cancer by Karipidis et al. (2024) has Serious Flaws that Undermine the Validity of the Study’s Conclusions","authors":"John W. Frank ,&nbsp;Joel M. Moskowitz ,&nbsp;Ronald L. Melnick ,&nbsp;Lennart Hardell ,&nbsp;Alasdair Philips ,&nbsp;Paul Héroux ,&nbsp;Elizabeth Kelley","doi":"10.1016/j.envint.2024.109200","DOIUrl":"10.1016/j.envint.2024.109200","url":null,"abstract":"","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109200"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assembly of soil multitrophic community regulates multifunctionality via multifaceted biotic factors in subtropical ecosystems","authors":"Chao Chang ,&nbsp;En Hu ,&nbsp;Xiaofeng Tang ,&nbsp;Sisi Ye ,&nbsp;Dan Zhao ,&nbsp;Zhi Qu ,&nbsp;Ming Li","doi":"10.1016/j.envint.2025.109272","DOIUrl":"10.1016/j.envint.2025.109272","url":null,"abstract":"<div><div>Soil biodiversity underpins multiple ecosystem functions and services essential for human well-being. Understanding the determinants of biodiversity-ecosystem function relationships (BEFr) is critical for the conservation and management of soil ecosystems. Community assembly processes determine community diversity and structure. However, there remains limited systematic research on how the assembly processes of multiple organismal groups affect soil ecosystem functions through their influence on biodiversity and species interactions. Here, we analyzed 331 soil samples from different land-use types (cropland, forest, and grassland) in the Qinling-Daba Mountains to investigate the drivers, assembly processes, and network stability of multitrophic organisms. High-throughput sequencing was used to examine archaea, bacteria, fungi, algae, protozoa, and invertebrates, while enzyme activity assays were used to assess ecosystem multifunctionality related to nutrient provisioning. Our results indicated that biotic factors contributed to 62.81–94.97 % of α-diversity and 4.19–52.37 % of β-diversity in multitrophic organisms, even when considering the influence of abiotic factors. Protozoan α- and β-diversity most significantly explained the α- and β-diversity of bacteria, fungi, algae, and invertebrates in soil ecosystems, serving as important indicators for assessing soil multifunctionality and ecosystem health. Furthermore, the assembly processes in prokaryotes were primarily governed by stochasticity (&gt;50 %), whereas those in eukaryotic groups were dominated by deterministic processes (&lt;50 %). Diversity and network stability increased with greater stochasticity in bacterial communities where stochastic processes predominated. Conversely, in fungal and protozoan communities dominated by deterministic processes, diversity and network stability decreased as deterministic processes intensified. Importantly, stochastic processes in soil multitrophic assembly enhanced ecosystem multifunctionality by increasing α-diversity, β-diversity, and network stability. These findings provide valuable insights into the regulation of BEFr by multitrophic assembly processes. Future research should further explore the role of these assembly processes in soil ecosystem functioning under land-use change scenarios.</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109272"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifying the healthy places to live in Australia with a new environmental quality health index","authors":"Shuang Zhou ,&nbsp;Zhihu Xu ,&nbsp;Wenzhong Huang,&nbsp;Yao Wu,&nbsp;Rongbin Xu,&nbsp;Zhengyu Yang,&nbsp;Pei Yu,&nbsp;Wenhua Yu,&nbsp;Tingting Ye,&nbsp;Bo Wen,&nbsp;Shanshan Li,&nbsp;Yuming Guo","doi":"10.1016/j.envint.2025.109268","DOIUrl":"10.1016/j.envint.2025.109268","url":null,"abstract":"<div><h3>Background</h3><div>Existing environmental quality indices often fail to account for the varying health impacts of different exposures and exclude socio-economic status indicators (SES).</div></div><div><h3>Objectives</h3><div>To develop and validate a comprehensive Environmental Quality Health Index (EQHI) that integrates multiple environmental exposures and SES to assess mortality risks across Australia.</div></div><div><h3>Methods</h3><div>We combined all-cause, cardiovascular, and respiratory mortality data (2016–2019) from 2,180 Statistical Areas Level 2 with annual mean values of 12 environmental exposures, including PM_2.5, ozone, temperature, humidity, normalized difference vegetation index, night light, road and building density, and socioeconomic status. Exposure-mortality relationships were estimated using a spatial age-period-cohort model, and EQHIs (scored 0–100, with higher values indicating better conditions) were constructed. Validation was performed using K-fold cross-validation and spatial regression models.</div></div><div><h3>Results</h3><div>Validation showed strong model performance (R-squared = 83.53 %, 75.55 %, and 52.44 % for EQHI-all cause, EQHI-CVD, and EQHI-Resp). Each interquartile increase in EQHI-all cause reduced all-cause mortality risk by 10 %, with similar reductions for cardiovascular and respiratory mortality. Geographically, EQHIs were higher in south, east, and southeast coastal regions. From 2016 to 2019, SA2s with the highest EQHI (&gt;75) decreased from 27.1 % to 21.1 %. The population weighted EQHI was highest in Hobart and lowest in Darwin.</div></div><div><h3>Conclusions</h3><div>We established, to our knowledge, the first tool to quantify and communicate environmental health risks using three types of mortality data and 12 environmental factors. This EQHI provides a robust framework to assess environmental health risks and guide targeted interventions. Our methodology can be adapted globally to standardize risk evaluation.</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109268"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of diesel exhaust inhalation on cognitive performance in human volunteers: A randomized controlled crossover study","authors":"Jason Curran ,&nbsp;A.J. Hirsch Allen ,&nbsp;Christopher F. Rider ,&nbsp;Robin Shutt ,&nbsp;Chris Carlsten","doi":"10.1016/j.envint.2024.109213","DOIUrl":"10.1016/j.envint.2024.109213","url":null,"abstract":"<div><h3>Background</h3><div>Mounting evidence links exposure to traffic-related air pollution (TRAP) to impairment in cognitive functioning.</div></div><div><h3>Objectives</h3><div>To determine if short-term, controlled exposure to diesel exhaust (DE) adversely affects one or more cognitive function domains.</div></div><div><h3>Methods</h3><div>We carried out a double-blinded crossover design with 28 healthy, adult volunteers. Volunteers were exposed to two conditions for 120 min each, on separate order-randomized occasions: filtered air (FA) and DE (300 µg/m³ PM_2.5) at the Air Pollution Exposure Laboratory (APEL) at Vancouver General Hospital (VGH). Volunteers were blinded to the two exposure conditions. Volunteers completed five computerised neuropsychological tests of the Cambridge Neuropsychological Test Automated Battery (CANTAB) prior to (2-hr before) and at three timepoints following each exposure condition (0-hr, 3-h post-, and 24-h post-exposure). The selected CANTAB tests were related to five cognitive domains – attention, spatial working memory, strategy use, executive function, and processing speed. We hypothesized that short-term diesel exposure would adversely affect one or more cognitive function domains.</div></div><div><h3>Results</h3><div>Following screening, 15 volunteers were randomized to receive FA followed by DE and 14 volunteers were randomized to receive the exposures in the reverse sequence. A total of 28 volunteers contributed to the final analysis. Short-term exposure to DE was associated with slower reaction times in the Reaction Time Index task. DE was associated with a decrease of 18.2 ms (p = 0.05) in simple reaction time and 23.5 ms (p = 0.04) in five-choice reaction time.</div></div><div><h3>Conclusions</h3><div>This first study to investigate the effects of TRAP on the cognitive performance of humans in a controlled environment shows slowed reaction times similar to those previously demonstrated with blood alcohol levels of 0.05%. Important implications exist for workers in occupations where attention and reaction time are connected to safety and performance.</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109213"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of a liquefied petroleum gas stove and fuel intervention on head circumference and length at birth: A multi-country household air pollution intervention network (HAPIN) trial","authors":"Hina Raheel ,&nbsp;Sheela Sinharoy ,&nbsp;Anaité Diaz-Artiga ,&nbsp;Sarada S. Garg ,&nbsp;Ajay Pillarisetti ,&nbsp;Kalpana Balakrishnan ,&nbsp;Marilu Chiang ,&nbsp;Amy Lovvorn ,&nbsp;Miles Kirby ,&nbsp;Usha Ramakrishnan ,&nbsp;Shirin Jabbarzadeh ,&nbsp;Alexie Mukeshimana ,&nbsp;Michael Johnson ,&nbsp;John P. McCracken ,&nbsp;Luke P. Naeher ,&nbsp;Ghislaine Rosa ,&nbsp;Jiantong Wang ,&nbsp;Joshua Rosenthal ,&nbsp;William Checkley ,&nbsp;Thomas F. Clasen ,&nbsp;Lisa M. Thompson","doi":"10.1016/j.envint.2024.109211","DOIUrl":"10.1016/j.envint.2024.109211","url":null,"abstract":"<div><h3>Background</h3><div>Air pollution may impair child growth and cognitive development, with potential markers including birth length and head circumference.</div></div><div><h3>Methods</h3><div>The Household Air Pollution Intervention Network (HAPIN) trial was an open label multi-country-randomized controlled trial, with 3200 pregnant women aged 18–34 years (9–19 weeks of gestation) randomly assigned in a 1:1 ratio to receive liquefied petroleum gas (LPG) stove intervention compared to women continuing to cook with solid fuels for 18 months. Particulate matter ≤ 2.5 μm (PM2.5), black carbon (BC) and carbon monoxide (CO) 24-hour personal exposures were measured three times during pregnancy. Head circumference and length were measured &lt; 24 h of birth. We conducted intention-to-treat and exposure–response analyses to determine the intervention effects and associations between household air pollution (HAP) exposure during pregnancy and head circumference, head circumference-for-gestational age Z-score, length, and length-for-gestational age Z-scores at birth. <span><span>ClinicalTrials.gov</span><svg><path></path></svg></span>.</div></div><div><h3>Results</h3><div>Between May 2018, and Feb 2020, 3200 pregnant women were randomly assigned to intervention (n = 1593) and control groups (n = 1607) with 3060 births included in the analysis. There was a 71.9 % reduction in PM2.5 in the intervention group with similar reductions for BC and CO. Intention-to-treat analysis showed that the intervention did not affect head circumference (β = -0.01 cm, 95 %CI −0.11, 0.09), head circumference-for-gestational age Z-score (β = -0.01, 95 %CI −0.08, 0.07), or birth length (β = 0.14 cm, 95 %CI −0.01, 0.29) but did increase birth length-for-gestational age Z-score (β = 0.09, 95 %CI 0.01, 0.16). After covariate adjustment, exposure–response analysis revealed that each log-unit increase in BC was associated with a decrease in birth length-for-gestational age Z-score (β = -0.07, 95 %CI −0.13, −0.005). There was no evidence of hypothesized associations with PM2.5 or CO.</div></div><div><h3>Conclusion</h3><div>An LPG intervention reduced HAP exposure during pregnancy but had minor effects on birth length-for-gestational age Z-score. Birth length-for-gestational age was only associated with BC.</div><div><strong>Clinical Trial Registration:</strong> The study has been registered with <span><span>ClinicalTrials.gov</span><svg><path></path></svg></span> (Identifier NCT02944682).</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109211"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142879783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the role of selenium in Minamata disease through reanalysis of historical samples","authors":"Mineshi Sakamoto ,&nbsp;Masumi Marumoto ,&nbsp;Koichi Haraguchi ,&nbsp;Takashi Toyama ,&nbsp;Yoshiro Saito ,&nbsp;Steven J. Balogh ,&nbsp;Chiharu Tohyama ,&nbsp;Masaaki Nakamura","doi":"10.1016/j.envint.2024.109242","DOIUrl":"10.1016/j.envint.2024.109242","url":null,"abstract":"<div><div>Minamata disease, a severe neurological disorder identified in Japan in 1956, results from methylmercury (MeHg) intoxication in humans due to environmental contamination. Before MeHg was recognized as the cause, selenium (Se) was suspected of being the potential cause owing to elevated Se levels in patients’ organs. Subsequent animal studies indicated that Se mitigates MeHg toxicity; however, its role in Minamata disease remains unexplored. We analyzed Hg and Se in historical samples of the industrial wastes (n = 4) on the factory site, sediments (n = 9), and fish/shellfish (n = 16) in Minamata Bay, and organs of patients with Minamata disease (n = 12). All samples showed elevated levels of both Hg and Se, providing the first evidence that Se was also discharged into Minamata Bay, entering the food chain and accumulating at high levels in patient organs. The Hg/Se molar ratio in contaminated shellfish (median &gt; 3.0) indicated exceptionally high MeHg exposure, far exceeding the ordinary level (&lt; 1.0). Patients exhibited significantly increased Se levels in the liver and kidney but lower amounts in the brain. Notably, median Hg/Se molar ratios exceeding 4.0 were observed, particularly in the cerebrum and cerebellum in acute cases, closely mirroring the molar ratios found in seafood. The elevated Hg/Se molar ratio in the brain helps explain the severe neurological damage in patients’ central nervous systems, despite higher Hg levels in the liver and kidney compared to the brain. These findings provide important insight into the mechanism of MeHg intoxication and highlight the risks associated with MeHg-contaminated seafood, aiding efforts to protect consumers.</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109242"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142887020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does the household clean energy transition benefit the mental health of the elderly in rural China? Evidence from China health and retirement longitudinal study","authors":"Hengxing Yin ,&nbsp;Ling Han ,&nbsp;Li Yan ,&nbsp;Chenhao Liu","doi":"10.1016/j.envint.2024.109186","DOIUrl":"10.1016/j.envint.2024.109186","url":null,"abstract":"<div><div>Clean energy transition has become a key strategy in combating global air pollution. In 2017, China launched its “coal-to-gas” policy, which provided subsidies to households for their clean energy transition. While debates on this policy focus mainly on safety and cost concerns, few studies have examined the causal relationship between energy transition and its health benefits, particularly mental health. Using data from the China Health and Retirement Longitudinal Survey (CHARLS), this paper employs a difference-in-differences (DID) approach to estimate the impact of the “coal-to-gas” policy on the mental health of the rural elderly in China. The findings indicate that the policy significantly improved the cognitive status of the elderly, especially episodic memory, which saw a 10.4% increase relative to the sample mean. The policy also significantly boosted the proportion of households using clean cooking fuels by 5.8%. Further analysis suggests that the improved sleep quality from reduced indoor air pollution by household energy transition, as a mechanism, could explain these results. This study provides a timely assessment of the policy’s effectiveness, highlighting the importance of indoor air pollution control by household energy transition.</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109186"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microplastics mediates the spread of antimicrobial resistance plasmids via modulating conjugal gene expression","authors":"Qiu E. Yang ,&nbsp;Zhenyan Lin ,&nbsp;Dehao Gan ,&nbsp;Minchun Li ,&nbsp;Xuedan Liu ,&nbsp;Shungui Zhou ,&nbsp;Timothy R. Walsh","doi":"10.1016/j.envint.2025.109261","DOIUrl":"10.1016/j.envint.2025.109261","url":null,"abstract":"<div><div>Antimicrobial resistance (AMR) and environmental degradation are existential global public health threats. Linking microplastics (MPs) and AMR is particularly concerning as MPs pollution would have significant ramifications on controlling of AMR; however, the effects of MPs on the spread and genetic mechanisms of AMR bacteria remain unclear. Herein, we performed Simonsen end-point conjugation to investigate the impact of four commonly used MPs on transfer of clinically relevant plasmids. The transfer breadth of a representative pA/C_MCR-8 plasmid across bacterial communities was confirmed by the cell sorting and 16S rRNA gene amplicon sequencing. Our study shows that exposure to four commonly found MPs promotes the conjugation rates of four clinically relevant AMR plasmids by up to 200-fold, when compared to the non-exposed group and that the transfer rates are MP concentrations demonstrate a positive correlation with higher transfer rates. Furthermore, we show that MPs induce the expression of plasmid-borne conjugal genes and SOS-linked genes such as <em>recA</em>, <em>lexA</em>, <em>dinB</em> and <em>dinD</em>. High-throughput sequencing of the broad transmission of plasmid pA/C_MCR-8, shows distribution over two main phyla, <em>Pseudomonadota</em> (50.0 %-95.0 %) and <em>Bacillota</em> (0.4 %-2.0 %). These findings definitively link two global health emergencies − AMR and environmental degradation via MPs, and to tackle global AMR, we must also now consider plastic utilisation and waste management.</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109261"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transport and sedimentation of microplastics by turbidity currents: Dependence on suspended sediment concentration and grain size","authors":"Marianna Soler ,&nbsp;Jordi Colomer ,&nbsp;Florian Pohl ,&nbsp;Teresa Serra","doi":"10.1016/j.envint.2025.109271","DOIUrl":"10.1016/j.envint.2025.109271","url":null,"abstract":"<div><div>Using lock-exchange experiments, this study investigates the transport and sedimentation of microplastics (MPs) via turbidity currents. Two hypotheses were tested: MP sedimentation is influenced by suspended sediment concentration and grain size. Utilizing flows with different sediment concentrations and grain sizes in combination with three different MPs (PET fibers, melamine, and PVC fragments), the experiments revealed distinct sedimentation patterns: higher sediment concentrations enhance MP transport, and turbidity currents with finer sediments transported MPs over greater distances, highlighting the importance of sediment characteristics to predict MP distribution by such flows. Further, MP sedimentation patterns varied in dependence on MP-particle shape, size, and density, highlighting the crucial role of MP particle properties in determining MP distribution in turbidites. These findings enhance our understanding of the mechanisms controlling the spatial distribution of MPs in marine sedimentary-environments and underscores the importance of considering both hydrodynamic and particle-specific factors when addressing the complex behaviour of MPs.</div></div>","PeriodicalId":308,"journal":{"name":"Environment International","volume":"195 ","pages":"Article 109271"},"PeriodicalIF":10.3,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}