Journal of Environmental Sciences-china最新文献_第6页

Mechanism of boron removal and stabilization by in-situ formation of layered double hydroxides: Insight from spectroscopy and DFT studies 原位形成层状双氢氧化物去除硼和稳定硼的机理：来自光谱和DFT研究的见解

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-27 DOI: 10.1016/j.jes.2025.04.069

Yafan Wang , Yusuf Olalekan Zubair , Shuo Pan , Chiharu Tokoro

{"title":"Mechanism of boron removal and stabilization by in-situ formation of layered double hydroxides: Insight from spectroscopy and DFT studies","authors":"Yafan Wang , Yusuf Olalekan Zubair , Shuo Pan , Chiharu Tokoro","doi":"10.1016/j.jes.2025.04.069","DOIUrl":"10.1016/j.jes.2025.04.069","url":null,"abstract":"<div><div>A method for the effective <em>in-situ</em> formation of boron-containing Mg-Al layered double hydroxides (LDHs) was developed for boron removal and stabilization. The influence of the B/Al molar ratio and pH on the formation of Mg-Al-B–LDHs was investigated. Compared with the adsorption method, under a high B/Al ratio, the coprecipitation method increased the boron sorption density from 0.256 to 0.472 of Al. The Toxicity Characteristic Leaching Procedure showed that the boron-coprecipitated LDHs exhibited higher stability than the boron-adsorption LDHs. The synthesized LDH samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and solid-state <sup>11</sup>B-NMR. The results showed that boron was effectively incorporated into the LDH structure for the coprecipitation method. Combined with the experimental results, a potential <em>in-situ</em> formation pathway for Mg-Al-B–LDHs was elucidated through density functional theory calculations. The boron tended to directly incorporate into the LDH structure in the coprecipitation method, whereas it was predominantly adsorbed on the LDH surface in the adsorption method. The adsorption energy demonstrated that boron preferentially bonded to Mg<sup>2+</sup> sites on the surface. The mechanism of boron incorporation in the LDHs for the coprecipitation method involved precipitation of amorphous aluminum hydroxide, layered boehmite transformation, nucleation, and layer stacking. During these processes, boron formed complexes to enhance its stability. Residual boron underwent further reactions with the LDHs, including surface adsorption and ion exchange. These findings provide theoretical insight into the effective removal and long-term immobilization of boron in landfill leachate self-remediation processes.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 569-580"},"PeriodicalIF":6.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling the threshold and interaction effects of environmental variables on cadmium contamination in rice grains 环境变量对水稻镉污染的阈值及交互效应研究

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-27 DOI: 10.1016/j.jes.2025.04.073

Yang Zeng , Chen Shen , Bolun Zhang , Jie Ren , Zhanbin Huang , Hong Hou

{"title":"Unraveling the threshold and interaction effects of environmental variables on cadmium contamination in rice grains","authors":"Yang Zeng , Chen Shen , Bolun Zhang , Jie Ren , Zhanbin Huang , Hong Hou","doi":"10.1016/j.jes.2025.04.073","DOIUrl":"10.1016/j.jes.2025.04.073","url":null,"abstract":"<div><div>Understanding Cd contamination in the soil-rice ecosystem and the underlying its threshold and interaction effects is crucial for controlling Cd pollution and ensuring food safety. Although the quantitative relationships between Cd and environmental variables have been extensively studied, the threshold and interaction effects of multi-source environmental variables remain largely unexplored. This study employs a combination of random forest analysis and a human health risk model to investigate the effects of variables on Cd levels in rice grains, with the goal of quantifying their contributions and elucidating their relationships. The results indicated that the 15 selected variables collectively explained 47.36 % of the variation in Cd content, with the top three variables being soil pH, distance from industrial park, and soil Zn. The majority of variables exhibited threshold effects on Cd levels in rice grains. By visualizing the interaction between Soil pH, distance from industrial park, and soil Zn with Cd levels in rice, we demonstrate the threshold effects of them on Cd level in rice grains, thereby providing further insight into the variation observed. Furthermore, oral intake of rice has been identified as the primary route of human exposure, significantly contributing to overall exposure pathways. Understanding these interactions is crucial for gaining insights into the underlying processes driving Cd pollution and fostering sustainable development within the industry. Our findings underscore the crucial need to consider multiple environmental variables and their interactions when managing heavy metals (HMs) contamination and mitigating health risks.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 450-460"},"PeriodicalIF":6.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Free radical mechanisms of halogen coexistence promoting pollutants formation 卤素共存促进污染物形成的自由基机制

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-27 DOI: 10.1016/j.jes.2025.04.056

Mingxuan Wang , Shuting Liu , Linjun Qin , Qingyu Guo , Guorui Liu , Dong Cao , Lili Yang , Minghui Zheng

{"title":"Free radical mechanisms of halogen coexistence promoting pollutants formation","authors":"Mingxuan Wang , Shuting Liu , Linjun Qin , Qingyu Guo , Guorui Liu , Dong Cao , Lili Yang , Minghui Zheng","doi":"10.1016/j.jes.2025.04.056","DOIUrl":"10.1016/j.jes.2025.04.056","url":null,"abstract":"<div><div>Halogens are common in industrial thermal processes and can induce formation of toxic organic pollutants. Currently, the specific effects of coexisting halogens on toxic pollutant formation are unclear. In this study, we found the boosting effects of halogens on organic pollutants formation during thermal processes. <em>In situ</em> electron paramagnetic resonance spectroscopy was used to distinguish the organic free radical intermediates of organic pollutants during thermal processes. The pure chlorine-containing reaction system dominantly induce the formation of highly chlorinated phenoxy radicals, whereas the pure bromine-containing reaction system induce the formation of semiquinone radicals. The results provide clear evidence for the molecular mechanisms by which halogen coexistence boosts pollutants formation. Coexisting halogens made the reactions much more complex. Bromine atom radicals (Br·) can enhance the level of active chlorine atoms radicals (Cl·), then (1) facilitating highly chlorinated organic radicals and toxic pollutants formation, (2) activating polycyclic aromatic hydrocarbons molecules for subsequent ring growth and (3) accelerating oxidation reactions. Combining the identification of organic free radical intermediates and characteristics of products, detailed mechanisms of halogens on the formations of organic pollutants during thermal-related processes were clarified, which can be helpful for their efficient control in the widespread bromines and chlorines co-existence reaction system.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 559-568"},"PeriodicalIF":6.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risk assessment and environmental influencing factors of urinary polycyclic aromatic hydrocarbons metabolites in pregnant women in Zunyi, China 遵义孕妇尿多环芳烃代谢物风险评价及环境影响因素分析

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-27 DOI: 10.1016/j.jes.2025.04.063

Jing Yang , Jing Jiang , Linfei Wu , Pei Xu , Nian Wu , Rui Yu , Yanling Xiao , Xingting Zheng , Rong Zeng , Yuanzhong Zhou , Yan Xie , Xubo Shen

{"title":"Risk assessment and environmental influencing factors of urinary polycyclic aromatic hydrocarbons metabolites in pregnant women in Zunyi, China","authors":"Jing Yang , Jing Jiang , Linfei Wu , Pei Xu , Nian Wu , Rui Yu , Yanling Xiao , Xingting Zheng , Rong Zeng , Yuanzhong Zhou , Yan Xie , Xubo Shen","doi":"10.1016/j.jes.2025.04.063","DOIUrl":"10.1016/j.jes.2025.04.063","url":null,"abstract":"<div><div>Despite the widespread presence and frequent detection of polycyclic aromatic hydrocarbons (PAHs) in various aspects of life, there is limited research on their exposure levels in pregnant women and cumulative exposure from the living environment. This study included 1311 women in late pregnancy from the Zunyi birth cohort and measured the urinary concentrations of 10 hydroxylated PAH metabolites (OH-PAHs). Risk assessment was conducted based on the estimated daily intake to calculate the hazard quotient and hazard index (HI). A linear regression model was used to analyze the relationship between creatinine-adjusted OH-PAHs concentrations and living environment and lifestyle factors, while principal component analysis was applied to trace the sources of PAHs exposure. 1-OHPYR was detected in all participants' urine, with naphthalene metabolites having the highest concentrations among creatinine-adjusted PAHs. OH-PAHs concentrations were associated with housing type, room number, cooking frequency, household size, exercise frequency, fuel type, distance from main road, and drinking water source. Pregnant women using traditional fuels and living in bungalows had higher health risks than those using clean energy and living in buildings. Those living within 100 m of a main road had higher HI than those farther away. Coal combustion was identified as the primary source of PAHs exposure. The study emphasizes the importance of reducing PAHs exposure, especially for pregnant women living in polluted environments. It recommends public health interventions such as improving indoor ventilation and providing clean energy to reduce related health risks.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"159 ","pages":"Pages 617-623"},"PeriodicalIF":6.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption mechanism of phosphate and arsenate in water by Al-doped Zr-based MOF and theoretical DFT study 掺铝zr基MOF对水中磷酸盐和砷酸盐的吸附机理及理论DFT研究

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-27 DOI: 10.1016/j.jes.2025.04.054

Qiaoshu Zhou , Yewei Qiu , Wenjing Chen, Fan Lei, Hao Xiang, Fan Zheng, Zhiguo Lin, Xiangjun Yang

{"title":"Adsorption mechanism of phosphate and arsenate in water by Al-doped Zr-based MOF and theoretical DFT study","authors":"Qiaoshu Zhou , Yewei Qiu , Wenjing Chen, Fan Lei, Hao Xiang, Fan Zheng, Zhiguo Lin, Xiangjun Yang","doi":"10.1016/j.jes.2025.04.054","DOIUrl":"10.1016/j.jes.2025.04.054","url":null,"abstract":"<div><div>Excessive phosphorus and arsenic in water bodies not only destroy ecosystems but also pose a serious threat to human health. In this study, a series of Al-doped modified metal-organic frameworks (Zr-Al-MOF) were prepared by solvothermal method, which achieved efficient removal of phosphate and arsenate in water. Due to the use of inexpensive Al salts, the material has a lower cost and is more economical. The molar ratio of metal salts, adsorption time, solution pH, initial concentration, temperature and coexisting anions were studied, and it was found that when the molar ratio of Zr: Al was 2, Zr-Al-MOF had the best adsorption performance for phosphate and arsenate, and the maximum adsorption capacity was 93.04 mg P/g and 173.83 mg As/g, respectively. It traps phosphate and arsenate at a fast reaction rate and can be recycled repeatedly. In addition, 0.15 g/L of 2Zr-Al-MOF can effectively reduce the phosphate and arsenate content in the contaminated spring water samples of Yangzonghai Lake to the standard range of drinking water, which further confirms the application potential of 2Zr-Al-MOF. By FT-IR and XPS analysis, it was found that the adsorption mechanism was ligand exchange, electrostatic attraction and hydrogen bond formation. The theoretical calculation shows that the adsorption energy is negative, which indicates that 2Zr-Al-MOF is attractive to phosphate and arsenate, and the adsorption state is stable. The results show that 2Zr-Al-MOF is an effective phosphate and arsenate adsorbent and has broad application prospects in eutrophication water treatment.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 143-154"},"PeriodicalIF":6.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of regionalized distribution of antibiotics and ARGs in Daliao River-Liaodong Bay waters and their environmental impact factors 大辽河-辽东湾水域抗生素和ARGs的区域分布特征及其环境影响因素

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-27 DOI: 10.1016/j.jes.2025.04.060

Bing Li , Hui Gao , Ruijing Li , Xuan Jia , Wenjun Yao , Ziwei Yao

{"title":"Characteristics of regionalized distribution of antibiotics and ARGs in Daliao River-Liaodong Bay waters and their environmental impact factors","authors":"Bing Li , Hui Gao , Ruijing Li , Xuan Jia , Wenjun Yao , Ziwei Yao","doi":"10.1016/j.jes.2025.04.060","DOIUrl":"10.1016/j.jes.2025.04.060","url":null,"abstract":"<div><div>This paper takes the water body of Daliao River-Liaodong Bay as the research object, divides it into three regions: river, estuary, and offshore, and analyzes the changes of antibiotics and antibiotic resistance genes (ARGs) from inland rivers to the sea and the environmental impact factors from this perspective. The results showed that in general, the pollution of antibiotics and ARGs in Daliao River-Liaodong Bay belonged to the medium-low level, and levels of antibiotics and ARGs were nd–106.23 ng/L and nd–1.95 × 10<sup>8</sup> copies/L, respectively. The concentrations and types of antibiotics and ARGs decreased from inland to sea regions. Analysis of the distributional characteristics of antibiotics and ARGs from a regionalized perspective revealed significant differences among the three regions in sulfonamide antibiotics, tetracycline antibiotics, and dominant ARGs. Sulfonamide antibiotic levels were significantly higher in the estuarine zone than in the riverine and offshore zones; tetracycline antibiotic levels were significantly higher in the riverine and estuarine zones than in the offshore zone. Aminoglycosides were dominant in the riverine and estuarine zones, and macrolides were dominant in the offshore zone. We characterized the effects of environmental factors on the assignment of antibiotics and ARGs and found that overall temperature contributed the most to variation in antibiotics and ARGs; the contribution of dissolved oxygen was the lowest. The estuarine zone was most affected by these factors, followed by the offshore zone and finally the riverine zone.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 722-731"},"PeriodicalIF":6.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insights into the remediation of trichloroethene contaminated groundwater by simulated permeable reactive barrier with biochar-iron composites: Synergistic mechanism and hydraulic performance 生物炭-铁复合材料模拟渗透反应屏障修复三氯乙烯污染地下水：协同机制和水力性能

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-27 DOI: 10.1016/j.jes.2025.04.057

Fei Wang , Meiyang Jiang , Zijun Ye , Mingshuai Guo , Jian Xu , Yunhui Zhang , Benyi Cao

{"title":"Insights into the remediation of trichloroethene contaminated groundwater by simulated permeable reactive barrier with biochar-iron composites: Synergistic mechanism and hydraulic performance","authors":"Fei Wang , Meiyang Jiang , Zijun Ye , Mingshuai Guo , Jian Xu , Yunhui Zhang , Benyi Cao","doi":"10.1016/j.jes.2025.04.057","DOIUrl":"10.1016/j.jes.2025.04.057","url":null,"abstract":"<div><div>Biochar and zero-valent iron are promising materials for the removal of trichloroethylene (TCE) from groundwater, but further research is still required on the synergistic mechanism and hydraulic performance in the permeable reactive barriers (PRBs) with biochar-iron composites. In this work, biochar-iron composites were synthesized by two different methods, and subjected to the microscopic analysis, batch experiments and the PRB’s model tests. The results indicated that the removal rates of TCE on biochar-iron composites reached above 90 %, and the optimal removal conditions were the initial pH of 6.0 and a biochar/iron mass ratio of 5:1. The removal of TCE on biochar-iron composites followed the pseudo-second-order and Freundlich models, and the maximum adsorption capacity of TCE was 25.95 mg/g. The adsorption of biochar and dechlorination of nZVI dominated the removal of TCE. Biochar significantly enhanced the dechlorination of TCE on nZVI through modifying the electrochemical characteristics to lower its corrosion potential of nZVI, promote direct electron transfer, and improve electronic transfer capability. M-5BC-1nZVI exhibited excellent hydraulic performance for maintaining an adequate permeability coefficient (10<sup>−6</sup> to 10<sup>−5</sup> m/s).</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 600-609"},"PeriodicalIF":6.3,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atmospheric oxidation capacity and its influence on secondary pollution during winter PM2.5 haze episodes in Urumqi 乌鲁木齐冬季PM2.5雾霾期间大气氧化能力及其对二次污染的影响

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-26 DOI: 10.1016/j.jes.2025.04.041

Binqian Fan , Yingying Liu , Gaofeng Yu , Zhenze Song , Yanhui Liu , Xiaoli Wang , Chunmei Geng , Wen Yang

{"title":"Atmospheric oxidation capacity and its influence on secondary pollution during winter PM2.5 haze episodes in Urumqi","authors":"Binqian Fan , Yingying Liu , Gaofeng Yu , Zhenze Song , Yanhui Liu , Xiaoli Wang , Chunmei Geng , Wen Yang","doi":"10.1016/j.jes.2025.04.041","DOIUrl":"10.1016/j.jes.2025.04.041","url":null,"abstract":"<div><div>Atmospheric oxidation capacity (AOC) refers to the oxidation capacity of atmospheric chemical processes for major pollutants. A comprehensive observation campaign was conducted on a typical PM<sub>2.5</sub> pollution event in Urumqi, Northwest China, from January 15 to February 15, 2024. Four typical cases representing PM<sub>2.5</sub> levels from non-polluted to heavily polluted periods were selected to estimate AOC, OH reactivity, their relationship with secondary components, and the HO<em><sub>x</sub></em> budget in PM<sub>2.5</sub> using the Framework for 0-D Atmospheric Modeling model. Aromatics and alkanes contributed 54 %-79 % and 18 %-46 % of secondary organic aerosols (SOA) formation, respectively. The sulfur oxidation ratio (SOR) and nitrogen oxidation ratio (NOR) increased with rising PM<sub>2.5</sub> levels. As AOC increased, SOR showed the same trend, while NOR and SOA decreased slightly, and ammonia oxidation ratio values remained almost unchanged. OH radicals were the primary oxidants during the daytime, whereas NO<sub>3</sub> played a dominant role at nighttime. CO (24 %-51 %), NO<sub>2</sub> (27 %-34%), and alkenes (7 %-12 %) were the dominant contributors to OH reactivity. The HO<sub>2</sub> + NO reaction pathway contributes 67 %-84 % to the production of OH, while Others (including carbonyl compounds photolysis, the permutation reactions of RO<sub>2</sub>, etc.), RO<sub>2</sub> + NO and OH + CO reaction pathways were the main pathways for HO<sub>2</sub> production. A comprehensive understanding of the interactions among AOC, SOA, and radical cycling is crucial for formulating effective air quality management strategies aimed at mitigating secondary pollution under diverse atmospheric conditions.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 468-480"},"PeriodicalIF":6.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Black carbon in urban Jinan: Variations, health risks, and driving factors analyzed with machine learning 济南市城市黑碳变化、健康风险及驱动因素分析

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-24 DOI: 10.1016/j.jes.2025.04.049

Jiaqi Chen , Wenbin Yu , Xiaohan Cui , Qingzhu Zhang , Tianshuai Li , Xinfeng Wang , Yuchao Ren , Haolin Wang , Qiao Wang

{"title":"Black carbon in urban Jinan: Variations, health risks, and driving factors analyzed with machine learning","authors":"Jiaqi Chen , Wenbin Yu , Xiaohan Cui , Qingzhu Zhang , Tianshuai Li , Xinfeng Wang , Yuchao Ren , Haolin Wang , Qiao Wang","doi":"10.1016/j.jes.2025.04.049","DOIUrl":"10.1016/j.jes.2025.04.049","url":null,"abstract":"<div><div>Atmospheric black carbon (BC) significantly impacts climate change, atmospheric environment, and human health. To explore the temporal variation of BC concentration and its health effects during different periods in urban Jinan from 2021 to 2022, we analyzed BC concentration characteristics and assessed the population exposure risk using Monte Carlo simulation. Additionally, we studied the role of driving factors on BC using SHapley Additive exPlanations interpretation algorithm. A clear temporal trend was observed in BC levels, with the highest BC concentration in winter (2.40 ± 1.76 μg/m<sup>3</sup>) and the lowest in summer (1.46 ± 0.89 μg/m<sup>3</sup>), and a bimodal pattern in diurnal variation. Our results indicated that the carcinogenic risk of BC for adults exceeded the acceptable threshold in winter. With emissions playing a dominant role, meteorological conditions also significantly affected BC, with wind speed, relative humidity, and boundary layer height playing major roles in variations of BC concentration. Meteorological conditions during the haze periods favored BC accumulation, hours with elevated PM<sub>2.5</sub> levels were associated with high BC concentrations and increased carcinogenic effects. Understanding the temporal variations and drivers of BC is crucial for formulating effective policies to mitigate air pollution. Our study may provide theoretical methods and practical guidance for addressing BC levels under varying meteorological conditions and enhance understanding of atmospheric characteristics and population exposure to BC.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 508-516"},"PeriodicalIF":6.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning for ammonia volatilization prediction and slurry application management 氨挥发预测和浆料应用管理的机器学习

IF 6.3 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-04-24 DOI: 10.1016/j.jes.2025.04.045

Armand Favrot , Sophie Génermont , Céline Décuq , David Makowski

{"title":"Machine learning for ammonia volatilization prediction and slurry application management","authors":"Armand Favrot , Sophie Génermont , Céline Décuq , David Makowski","doi":"10.1016/j.jes.2025.04.045","DOIUrl":"10.1016/j.jes.2025.04.045","url":null,"abstract":"<div><div>Anthropogenic ammonia emissions primarily originate from agriculture, especially field fertilization. These emissions represent nitrogen loss for farmers and contribute to air pollution, posing risks to human health and the environment. Estimating ammonia emissions is crucial for national inventories and policy-making. Various models exist for predicting emissions, including mechanistic, empirical, and semi-empirical approaches. While machine learning (ML) is widely used in environmental science, its application to ammonia emissions remains limited. In this study, we used 5939 ammonia emission data from 538 trials, extracted from the ALFAM2 database, to train three machine learning methods - random forest, gradient boosting, and lasso - for predicting cumulative ammonia emissions 72 h after manure application. These methods were compared to the semi-empirical ALFAM2 model using an independent test dataset. Random forest (RMSE = 4.51, <em>r</em> = 0.94, MAE = 3.28, Bias = 0.92) and gradient boosting (RMSE = 6.19, <em>r</em> = 0.89, MAE = 4.10, Bias = 0.51) showed the best performance, while the lasso log-linear model (RMSE = 7.30, <em>r</em> = 0.84, MAE = 5.57, Bias = -1.38) performed worst. Both random forest and gradient boosting outperformed the semi-empirical ALFAM2 model, which showed performance comparable to the lasso model. We then used these models and the ALFAM2 model to compare five slurry management techniques, varying in application method (trailing hoses, trailing shoes, and open slot) and post-application incorporation, across 128 scenarios with different manure types and weather conditions. Compared to broadcast application, alternative techniques reduced emissions by a median of -13.6 % to -61.7 %. This study highlights the promise of ML models in assessing ammonia emission reduction methods, while emphasizing the importance of evaluating model sensitivity to algorithm choice.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 481-489"},"PeriodicalIF":6.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0