Journal of Environmental Sciences-china最新文献_第10页

Tire rubber derivative 6PPD and 6PPD-Q induce lipid accumulation in hepatocytes through ERRγ pathway 轮胎橡胶衍生物6PPD和6PPD- q通过ERRγ途径诱导肝细胞脂质积累

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-10-08 DOI: 10.1016/j.jes.2024.09.023

Shike Zhang , Xinyi Su , Jiada Zhang, Tingting He, Lei Tang, Zepei Zhao, Linying Cao

{"title":"Tire rubber derivative 6PPD and 6PPD-Q induce lipid accumulation in hepatocytes through ERRγ pathway","authors":"Shike Zhang , Xinyi Su , Jiada Zhang, Tingting He, Lei Tang, Zepei Zhao, Linying Cao","doi":"10.1016/j.jes.2024.09.023","DOIUrl":"10.1016/j.jes.2024.09.023","url":null,"abstract":"<div><div>N-phenyl-N′-(1,3-dimethylbutyl)-p-phenylenediamine (6PPD) is a tire rubber antioxidant that can be oxidized to form derivative 6PPD-quinone (6PPD-Q). 6PPD and 6PPD-Q have been detected in human urine with concentrations reaching nanomolar levels. However, their human adverse effects and toxic mechanisms are not explicit. This study elucidated their lipid metabolism disruption effects on hepatic cells (HepG2) and revealed a potential molecular mechanism via estrogen-related receptor γ (ERRγ) pathway. The results of fluorescence competitive binding assay showed that 6PPD and 6PPD-Q could bind to ERRγ with an IC<sub>50</sub> (the concentration of a ligand competing 50 % probe from ERRγ) of 9 nmol/L and 6 nmol/L, respectively. The reporter gene assay indicated that 6PPD-Q activated ERRγ in a concentration-dependent mode with the lowest observable effective concentration (LOEC) of 100 nmol/L and the maximum induction rate of 320 %, while 6PPD displayed weak ERRγ activity. The molecular docking showed that the binding energies of 6PPD/6PPD-Q with agonistic ERRγ were much lower than those with antagonistic ERRγ, implying that 6PPD/6PPD-Q tended to display ERRγ agonistic binding mode. The BODIPY fluorescence staining and triglyceride (TG) assay revealed that 6PPD and 6PPD-Q promoted lipid accumulation and TG production in HepG2 cells with LOEC of 10 nmol/L and 100 nmol/L, respectively. The ERRγ antagonist (GSK5182) co-exposure reversed the lipid induction effects of 6PPD/6PPD-Q, which confirmed the regulatory roles of ERRγ. Overall, our study revealed a novel endocrine disruption mechanism of 6PPD and 6PPD-Q via ERRγ and their hepatic lipid-inducing risks, providing novel information for their health hazard evaluation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 173-184"},"PeriodicalIF":5.9,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601648","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

Nitrogen addition decouples the microbial necro-mass from soil organic carbon formation in a temperate grassland 在温带草原上，氮的添加使微生物坏死体与土壤有机碳的形成脱钩

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-10-07 DOI: 10.1016/j.jes.2024.09.022

Huanhuan Cheng , Yingbin Li , Shuo Li , Tianran Sun , Guoxiang Niu , Qi Li , Junjie Yang , Yanxia Ma , Yingzhi Gao , Qiang Yu , Haitao Zhao , Qiushi Ning , Jing Ju , Xingguo Han

{"title":"Nitrogen addition decouples the microbial necro-mass from soil organic carbon formation in a temperate grassland","authors":"Huanhuan Cheng , Yingbin Li , Shuo Li , Tianran Sun , Guoxiang Niu , Qi Li , Junjie Yang , Yanxia Ma , Yingzhi Gao , Qiang Yu , Haitao Zhao , Qiushi Ning , Jing Ju , Xingguo Han","doi":"10.1016/j.jes.2024.09.022","DOIUrl":"10.1016/j.jes.2024.09.022","url":null,"abstract":"<div><div>Increasing anthropogenic nitrogen (N) inputs has profoundly altered soil microbial necro-mass carbon (MNC), which serves as a key source of soil organic carbon (SOC). Yet, the response pattern of MNC and its contribution to SOC across a wide range of N addition rates, remain elusive. In a temperate grassland with six years’ consecutive N addition spanning seven rates (0–50 g N/(m<sup>2</sup>·year)) in Inner Mongolia, China, we explored the responses of soil MNC and its contribution to SOC. The soil MNC showed a hump-shaped pattern to increasing N addition rates, with the N saturation threshold at 18.07 g N/(m<sup>2</sup>·year). The soil MNC was driven by nematode abundance and the ratio of bacterial to fungal biomass below the N threshold, and by plant biomass allocation pattern and diversity above the N threshold. The contribution of soil MNC to SOC declined with increasing N addition rates, and was mainly regulated by the ratio of MNC to mineral-associated organic carbon and plant diversity and the ratio of bacterial to fungal biomass. In addition, the soil MNC and SOC differentially responded to N addition and were mediated by disparate biological and geochemical mechanisms, leading to the decoupled MNC production from SOC formation. Together, in this N-enriched temperate grassland, the soil microbial necro-mass production tends to be insufficient as a general explanation linking SOC formation. This study expands the mechanistic comprehension of the connections between external N input and soil carbon sequestration.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 200-212"},"PeriodicalIF":5.9,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143641857","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 and desorption of phenanthrene and 1-hydroxyphenanthrene by goethite-coated polyvinyl chloride 针铁矿包覆聚氯乙烯对菲和1-羟基菲的吸附与解吸

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-28 DOI: 10.1016/j.jes.2024.09.020

Zhiyu Zhang , Shuyue Liu , Dehua Zeng , Jingyi Gu , Tingting Cai , Ketong Chen , Hong Zhou , Zhi Dang , Chen Yang

{"title":"Adsorption and desorption of phenanthrene and 1-hydroxyphenanthrene by goethite-coated polyvinyl chloride","authors":"Zhiyu Zhang , Shuyue Liu , Dehua Zeng , Jingyi Gu , Tingting Cai , Ketong Chen , Hong Zhou , Zhi Dang , Chen Yang","doi":"10.1016/j.jes.2024.09.020","DOIUrl":"10.1016/j.jes.2024.09.020","url":null,"abstract":"<div><div>Microplastics loaded with phenanthrene and derivatives are widely detected in aquatic environments, and the coating of natural minerals or organic macromolecules may change the environmental behavior of microplastics. In this study, three kinds of composites with different coverage were prepared by coating goethite on the surface of polyvinyl chloride microplastics to investigate the adsorption and desorption behavior of phenanthrene (PHE) and 1-hydroxyphenanthrene (1-OHPHE), and the effect of mucin on desorption was investigated. The results showed that goethite promoted the adsorption of PHE and 1-OHPHE by increasing the specific surface area of the composites. With the increase of the cover degree, the adsorption of PHE decreased because of the decrease in hydrophobicity; while the adsorption of 1-OHPHE initially increased and then decreased with the contributions of hydrophobic interaction and hydrogen bond. The adsorption of 1-OHPHE could be influenced by the pH and ionic strength primarily through electrostatic interactions and Ca<sup>2+</sup> bridging. The goethite significantly increased the desorption hysteresis for two chemicals due to the complicated pore structures and increased adsorption affinity. Mucin promoted the desorption of PHE through competitive adsorption, and inhibit the desorption of 1-OHPHE through hydrophobic interaction, hydrogen bonding and Ca<sup>2+</sup> bridging. This study elucidated the effects of natural minerals on the adsorption and desorption behavior of organic pollutants on microplastics, briefly discussed the effects of organic macromolecules on the desorption behavior of pollutants with different properties, and emphasized the different environmental behaviors of pollutants.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 833-846"},"PeriodicalIF":5.9,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152841","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

Distribution and biotransfer of potentially toxic elements in a terrestrial ecosystem from an abandoned realgar mine 废弃雄黄矿中潜在有毒元素在陆地生态系统中的分布和生物转移

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-28 DOI: 10.1016/j.jes.2024.09.019

Fen Yang, Chaoyang Wei

{"title":"Distribution and biotransfer of potentially toxic elements in a terrestrial ecosystem from an abandoned realgar mine","authors":"Fen Yang, Chaoyang Wei","doi":"10.1016/j.jes.2024.09.019","DOIUrl":"10.1016/j.jes.2024.09.019","url":null,"abstract":"<div><div>The present study was conducted to examine the trophic transfer of potentially toxic elements (PTEs) in a closed arsenic mine. Eight PTEs in a soil-plant-leaf litter-earthworm-top predators (free-range local chicken and wild passerine bird) system were analyzed for nitrogen and carbon stable isotopes, PTE concentrations, bioaccumulation factors (BAFs), and transfer factors (TFs). The PTE concentrations in soils from mining areas were generally higher than a adjacent controlled area, with As and Cd in soils showing the prominent compared to other six PTEs, as seen for the indices of geo-accumulation index (<em>I</em><sub>geo</sub>), pollution index (PI) and potential ecological risk index (RI). The relatively high BAF and TF values suggested a distinct biotransfer of PTEs along the soil-plant-leaf litter-earthworm system. BAFs were mostly <1 except in earthworms, indicating that earthworms had a strong capacity to take up these metals. The TFs varied both among PTEs and organism's species, e.g., the transfer capacities of As in <em>Pteris vittata</em> and <em>Pteris cretica</em>, Cd in <em>Miscanthus sinensis</em>, and Pb, Cr and Mn in moss were the highest. For local free-range chicken and wild passerine bird, the concentrations of PTEs were higher in gastric contents and feather than in internal tissue (stomach, liver and heart), with lower contents in muscle and egg. Bioaccumulation of PTEs generally decreased from decomposer earthworms, to primary producer plants, to top predator, indicating a potential bio-dilution tendency in higher trophic levels in the terrestrial food chain.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 818-831"},"PeriodicalIF":5.9,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529865","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

Degradation of thiamphenicol by La-Fe2O3/DBD/HCP synergistic catalytic system La-Fe2O3/DBD/HCP协同催化体系降解硫霉素

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-27 DOI: 10.1016/j.jes.2024.09.015

Yimo Zhao , Lijiao Zheng , Yongyang Chen , Yuan Liu , Shimeng Huang , Shanping Li

{"title":"Degradation of thiamphenicol by La-Fe2O3/DBD/HCP synergistic catalytic system","authors":"Yimo Zhao , Lijiao Zheng , Yongyang Chen , Yuan Liu , Shimeng Huang , Shanping Li","doi":"10.1016/j.jes.2024.09.015","DOIUrl":"10.1016/j.jes.2024.09.015","url":null,"abstract":"<div><div>In this study, a highly efficient La-Fe<sub>2</sub>O<sub>3</sub>/dielectric barrier discharge (DBD)/honeycomb ceramic plate synergistic catalytic system was successfully constructed by using modified iron oxide (Fe<sub>2</sub>O<sub>3</sub>) catalyst coating assisted DBD plasma, and the prepared catalytic coating was fully characterized by various techniques. The results indicate that the lanthanum (La) is efficiently and uniformly doped in Fe<sub>2</sub>O<sub>3</sub>, and the modified La-Fe<sub>2</sub>O<sub>3</sub> catalyst exhibited a better photocatalytic performance. The overuse of Thiamphenicol (TAP), as a typical chloramphenicol antibiotic, has led to its accumulation in the aquatic environment. Accordingly, TAP was selected as the target contaminant to evaluate the catalytic activity of the synergistic system. The results confirmed that the catalytic ability of the synergistic catalytic system was significantly improved, and the data showed that the degradation rate of the synergistic system reached 99.1% under the same conditions compared with 68.2% for the single DBD plasma, which effectively improved low energy efficiency limitations of the single DBD technology. Through quantitative measurements of the concentrations of dissolved ozone (O<sub>3</sub>) and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) in the system and radical trapping experiments, combined with emission spectroscopy, the mechanism of synergistic system degradation of TAP was analyzed. The intermediates in the degradation process were characterized by high-resolution mass spectrometry, and the degradation pathway of TAP was proposed based on the analysis of the intermediates and their combination with theoretical calculations. This study presents a theoretical basis for the improvement of DBD technology and a technical guide for the removal process of antibiotics from industrial wastewater.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 805-819"},"PeriodicalIF":5.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152744","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

Recent advances, modification strategies and perspectives of Bi2WO6 in photocatalytic CO2 reduction reaction Bi2WO6光催化CO2还原反应的研究进展、改性策略及展望

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-26 DOI: 10.1016/j.jes.2024.09.007

Zhimin Yuan , Hongyan Zhang , Jizhou Jiang , Haiquan Wang , Xingling Zhao , Zheng Wang , Zaiyong Jiang , Hong He

{"title":"Recent advances, modification strategies and perspectives of Bi2WO6 in photocatalytic CO2 reduction reaction","authors":"Zhimin Yuan , Hongyan Zhang , Jizhou Jiang , Haiquan Wang , Xingling Zhao , Zheng Wang , Zaiyong Jiang , Hong He","doi":"10.1016/j.jes.2024.09.007","DOIUrl":"10.1016/j.jes.2024.09.007","url":null,"abstract":"<div><div>With the development of the global economy and the continuous consumption of fossil energy, a large amount of greenhouse gas CO<sub>2</sub> has been emitted into the atmosphere. Therefore, how to reduce the concentration of CO<sub>2</sub> in the atmosphere and convert it into high value-added products has gradually become a hot spot in scientific research. Photocatalytic CO<sub>2</sub> reduction technology can combine semiconductor with solar energy to convert CO<sub>2</sub> into high value-added organic carbon source through photocatalysis, which is of great significance for the effective utilization of solar energy and the emission reduction of CO<sub>2</sub>. After decades of exploration, many effective photocatalysts have been discovered. Among them, Bi<sub>2</sub>WO<sub>6</sub> with visible light absorption ability, as a new-type bismuth-based catalyst, has been widely studied due to its unique two-dimensional layered structure, stability, low cost and non-toxicity, et al. In this review, recent Advances of Bi<sub>2</sub>WO<sub>6</sub> in photocatalytic CO<sub>2</sub> reduction reaction are summarized, including reaction mechanism, product selective regulation, In-situ Fourier transform infrared spectra application, density functional theory calculation, and various modification strategies. Finally, based on the in-depth understanding of the above advances, the future modification strategies and design ideas of Bi<sub>2</sub>WO<sub>6</sub> in the field of photocatalytic CO<sub>2</sub> research are proposed. This has important practical significance for the latter design and development of Bi<sub>2</sub>WO<sub>6</sub>-based composite photocatalysts with high CO<sub>2</sub> conversion performance.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 157-172"},"PeriodicalIF":5.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576914","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

Response of formaldehyde to meteorology in Beijing: Primary or secondary contributions 北京地区甲醛对气象的响应：主要或次要贡献

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-23 DOI: 10.1016/j.jes.2024.09.016

Yanyu Kang , Yinghong Wang , Mengtian Cheng , Baoxian Liu , Dan Yao , Yiming Wang , Guiqian Tang

{"title":"Response of formaldehyde to meteorology in Beijing: Primary or secondary contributions","authors":"Yanyu Kang , Yinghong Wang , Mengtian Cheng , Baoxian Liu , Dan Yao , Yiming Wang , Guiqian Tang","doi":"10.1016/j.jes.2024.09.016","DOIUrl":"10.1016/j.jes.2024.09.016","url":null,"abstract":"<div><div>During high-temperature periods in summer, formaldehyde (HCHO) levels increase due to secondary production. However, recent studies have also shown a rise in the HCHO concentration in winter, but the underlying cause remains unclear. Here, HCHO observations in urban Beijing were conducted, the impact of meteorological differences between warm and cold seasons to HCHO concentrations was investigated. Additionally, the positive matrix factorization model was applied to the source apportionment of HCHO, with a focus on changes during pollution events. The results indicated that, during warm seasons, the secondary production of HCHO was driven by high temperature influenced by the low-pressure front, with the contribution of secondary production + background peaking at 85.9 % in the afternoon, exhibiting a unimodal diurnal variation. Conversely, during cold seasons, the influence of a uniform pressure field, coupled with weak winds, low boundary layers and high humidity, led to HCHO accumulation from primary emissions, resulting in multiday high-concentration pollution. During the most severe pollution periods, anthropogenic primary emissions contributed up to 91.7 %. Therefore, while the contribution of volatile organic compounds to HCHO levels through secondary production has been recognized, the significant impact of primary emissions during cold seasons cannot be overlooked.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 486-494"},"PeriodicalIF":5.9,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768004","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

Facile synthesis of silicon nanoparticles chelated lanthanide(III)-based electrospun nanofiber membranes for rapid on-site visual detection of tetracycline 用于四环素快速现场视觉检测的硅纳米颗粒螯合镧系电纺纳米纤维膜的快速合成

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-21 DOI: 10.1016/j.jes.2024.09.017

Xuhuan Yan, Junjie Wang, Jiaqi Shi, Xinyu Wang, Xianwei Lv, Chenlu Bao

{"title":"Facile synthesis of silicon nanoparticles chelated lanthanide(III)-based electrospun nanofiber membranes for rapid on-site visual detection of tetracycline","authors":"Xuhuan Yan, Junjie Wang, Jiaqi Shi, Xinyu Wang, Xianwei Lv, Chenlu Bao","doi":"10.1016/j.jes.2024.09.017","DOIUrl":"10.1016/j.jes.2024.09.017","url":null,"abstract":"<div><div>Tetracycline (TC) is a broad-spectrum antibiotic, and its residues in the environment and food are harmful to human health. Therefore, it is essential to rapidly, sensitively, and conveniently detect TC. In this work, we developed a portable silicon nanoparticles chelated Europium(III)-based polyacrylonitrile (Eu-SiNPs/PAN) nanofiber membrane for rapid, sensitive, and convenient detection of TC. The Eu-SiNPs were synthesized with a facile one-pot method. The Eu-SiNPs/PAN nanofiber membrane was fabricated by electrospinning, combining Eu-SiNPs and PAN with three-dimensional porous membrane structures and UV resistance. Both the Eu-SiNPs and the Eu-SiNPs/PAN nanofiber membranes have good selectivity and anti-interference ability towards TC. The combined merits of rapid response, long storage life, easy portability, and naked-eye recognition of TC make the Eu-SiNPs/PAN nanofiber membrane a promising material for convenient TC detection applications. The practicability of these nanofiber membranes was further verified by detecting TC in real samples, such as lake water, drinking water and honey, and achieved quantitative detection.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 474-485"},"PeriodicalIF":5.9,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768356","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

A gene island from plasmid pkk5 of Burkholderia sp. KK1 confers arsenic resistance to Caballeronia jiangsuensis 伯克氏菌KK1质粒pkk5的基因岛赋予了江苏卡瓦洛菌抗砷性

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.011

Lijie Huang , Yuhan Yang , Yingxin Xue , Shilin Hu , Tian Liang , Jun Ye , Ximei Xue

{"title":"A gene island from plasmid pkk5 of Burkholderia sp. KK1 confers arsenic resistance to Caballeronia jiangsuensis","authors":"Lijie Huang , Yuhan Yang , Yingxin Xue , Shilin Hu , Tian Liang , Jun Ye , Ximei Xue","doi":"10.1016/j.jes.2024.09.011","DOIUrl":"10.1016/j.jes.2024.09.011","url":null,"abstract":"<div><div>Microorganisms play a critical role in the biotransformation of arsenic and the form which it exists in the environment. In this study, a methyl parathion-degrading bacterium <em>Caballeronia jiangsuensis</em>, isolated from an abandoned pesticide manufacturing plant, was used to analyze arsenic accumulation and transformation. The accumulation of trivalent organoarsenic compounds in <em>C. jiangsuensis</em> occurred to a greater extent than that of their pentavalent counterparts. The chromosome of <em>C. jiangsuensis</em> contains an arsenic gene island whose GC content is significantly lower than that of the genome, suggesting that the island was acquired via horizontal gene transfer. There was approximately 90 %-99 % similarity between the proteins encoded by the gene island and the corresponding sequence of the plasmid pkk5 from <em>Burkholderia</em> sp. KK1. The biotransformation of different arsenic species by <em>C. jiangsuensis</em> was subsequently analyzed. The results revealed that monomethylarsenic acid (MAs(V)) was rapidly demethylated to arsenate with very small amounts of intermediate monomethylarsonous acid (MAs(III)), whereas MAs(III) was largely oxidized to MAs(V) despite the occurrence of the gene <em>arsI</em> probably responsible for aerobic demethylation of MAs(III) in <em>C. jiangsuensis</em>. In addition, dimethylarsenic acid was partly demethylated to arsenate. Horizontal gene transfer of <em>ars</em> operon from a plasmid to other bacteria represents an adaptation to a specific environment. This study provides a new perspective for understanding arsenic biogeochemical cycling.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 562-572"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474890","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

Explosive growth characteristics of 5.6–560 nm particles and deposition in human respiratory during spring in Yangtze River Delta region, China 长三角地区春季5.6 ~ 560nm颗粒爆炸生长特征及其在人呼吸道中的沉积

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-09-19 DOI: 10.1016/j.jes.2024.09.002

Yingru Gong , Jinping Ou , Qihou Hu , Chengzhi Xing , Yizhi Zhu , Yuhui Wan , Danni Wang , Chao Zhang , Lixin Guan , Jiaxuan Feng , Xiangguang Ji , Xinqi Wang , Cheng Liu

{"title":"Explosive growth characteristics of 5.6–560 nm particles and deposition in human respiratory during spring in Yangtze River Delta region, China","authors":"Yingru Gong , Jinping Ou , Qihou Hu , Chengzhi Xing , Yizhi Zhu , Yuhui Wan , Danni Wang , Chao Zhang , Lixin Guan , Jiaxuan Feng , Xiangguang Ji , Xinqi Wang , Cheng Liu","doi":"10.1016/j.jes.2024.09.002","DOIUrl":"10.1016/j.jes.2024.09.002","url":null,"abstract":"<div><div>Studying the contribution of regional transport to ultrafine particles (UFPs) and the deposition effect of nanoscale particles in human respiratory system is conducive to exploring the impact of atmospheric particles on the environment and human health. Based on the data set of number concentration spectrum in the particle size range of 5.6–560 nm in the spring of Hefei, the Yangtze River Delta region obtained by a fast mobility particle sizer, the explosive growth characteristics, potential source identification and deposition flux analysis of UFPs were systematically studied. The results showed that the frequency of new particle formation (NPF) events during spring was 31.5 %. SO<sub>2</sub> and O<sub>3</sub> contribute to NPF events. Daytime, higher temperature, stronger solar radiation and lower humidity were more conducive to the explosive growth of UFPs. In addition, regional transport of pollutants from the cities around Hefei played an important role in the accumulation mode particles, which were mainly affected by the land-source air mass from northwest Jiangsu (23.64 %) and the sea-source air mass from the Yellow Sea (23.99 %). It was worth noting that approximately 10,406 ng of UFPs enters the human respiratory system every day. The main deposition area of 5.6–560 nm nanoscale particles was alveolar, 5.6–400 nm is more likely to be deposited on alveolar, while nanoscale particles with particle size between 400 and 560 nm is more likely to be deposited on head airways. This study identified the deposition risk of nanoscale particles in the respiratory system under different particle sizes.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 372-381"},"PeriodicalIF":5.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377669","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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