Journal of Environmental Sciences-china最新文献_第9页

Inhibitory mechanism of Macleaya cordata crude extracts on freshwater cyanobacterium Microcystis aeruginosa 枸杞粗提物对淡水蓝藻铜绿微囊藻的抑制机制

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-28 DOI: 10.1016/j.jes.2025.01.030

Jin Ma , Fang Bai , Zichao Gong , Guofei Dai , Licheng Huang , Wei Chen , Yunlu Jia , Lirong Song

{"title":"Inhibitory mechanism of Macleaya cordata crude extracts on freshwater cyanobacterium Microcystis aeruginosa","authors":"Jin Ma , Fang Bai , Zichao Gong , Guofei Dai , Licheng Huang , Wei Chen , Yunlu Jia , Lirong Song","doi":"10.1016/j.jes.2025.01.030","DOIUrl":"10.1016/j.jes.2025.01.030","url":null,"abstract":"<div><div>A promising solution to combat harmful cyanobacterial blooms (CyanoHABs) is the use of naturally-derived cyanocidal compound. This study found that the crude extracts of the herbaceous plant <em>Macleaya cordata</em> can inhibit the growth of the bloom-forming cyanobacterium <em>Microcystis aeruginosa</em>. Growth inhibition test suggested that the inhibitory effect was significant at a concentration as low as 5 µg/L of the crude extracts. To comprehensively elucidate inhibitory mechanisms, we examined the responses in anti-oxidative systems, changes in triggering signals in cells, and hallmarks of programmed cell death (PCD) under the two levels of exposure to the crude extracts of <em>M. cordata</em>. A notable observation across all treatment groups was the significant increase in the superoxide dismutase activity of <em>M. aeruginosa</em> at 72 h. However, distinct patterns were observed in malondialdehyde (MDA), with no significant difference observed between the low concentration treatment group (5 µg/L) and the control group. In contrast, <em>Microcystis</em> cells subjected to high concentration (10 µg/L) exhibited a significant difference in MDA content at both 24 and 72 h. Furthermore, we observed that the levels of potential signaling molecules, e.g., intracellular reactive oxygen species, nitric oxide, and Ca<sup>2+</sup> were altered in the <em>Microcystis</em> cells after exposure to the crude extracts. This results in alterations to the levels of signaling molecules, which in turn stimulate the upregulation of orthocaspase, leading to PCD and population collapse eventually. This study examines the mechanisms of <em>Microcystis</em> suppression through naturally-derived substances, providing theoretical and technical foundations for the sustainable management of CyanoHABs.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 252-262"},"PeriodicalIF":5.9,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936414","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

Impact of regionally transported biomass burning on carbonaceous aerosol characterization, contribution and degradation in Pu'er, Southwest China 普洱区域输运生物质燃烧对碳质气溶胶特征、贡献和降解的影响

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-27 DOI: 10.1016/j.jes.2025.01.021

Jianwu Shi , Wenjun Rao , Chenyang Zhao , Li Deng , Xinyu Han , Wei Du , Jianhong Huang , Senlin Tian , Ping Ning , Jiming Hao , Yaoqian Zhong

{"title":"Impact of regionally transported biomass burning on carbonaceous aerosol characterization, contribution and degradation in Pu'er, Southwest China","authors":"Jianwu Shi , Wenjun Rao , Chenyang Zhao , Li Deng , Xinyu Han , Wei Du , Jianhong Huang , Senlin Tian , Ping Ning , Jiming Hao , Yaoqian Zhong","doi":"10.1016/j.jes.2025.01.021","DOIUrl":"10.1016/j.jes.2025.01.021","url":null,"abstract":"<div><div>Biomass burning (BB) emits carbonaceous aerosols that significantly influence air quality in Southwest China during spring. To further understand the characteristics of spring BB and its original contribution to organic carbon (OC), daily fine particulate matter (PM<sub>2.5</sub>) samples were collected from March to May 2022 in Pu'er, Southwest China. The concentrations of OC, elemental carbon (EC), levoglucosan (Lev), and potassium from BB (K<sup><em>+</em></sup><sub>BB</sub>) during the study period ranged from 5.3 to 31.2 µg/m<sup>3</sup>, 0.86–13.1 µg/m<sup>3</sup>, 0.06–0.82 µg/m<sup>3</sup>, and 0.05–2.88 µg/m<sup>3</sup>, respectively. To eliminate the effects of Lev degradation, this study uses the Aging of Air Mass (AAM) index to correct the atmospheric concentration of Lev and combines Bayesian mixture modeling with a molecular tracer method to assess the original contribution of BB to OC. The results indicated that the AAM index was 0.18 ± 0.05, indicating that the degradation of Lev reached 82 %. When considering the degradation of levoglucosan in the atmosphere, the primary source of BB aerosols was crop-straw combustion (71.1 %), followed by the combustion of certain hardwoods and softwoods (24.9%) and grasses (4.0 %). The original contribution of BB to OC was 62.4 %, which was much greater than the contribution when levoglucosan degradation (23.7 %) was ignored. The air mass inverse trajectories and Moderate Resolution Imaging Spectroradiometer (MODIS) fire hotspots indicated that the BB plume from Southeast Asia during spring could influence PM<sub>2.5</sub> long-range transport in remote locations, and the contribution could reach 82 % in Southwest China.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 710-723"},"PeriodicalIF":5.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606133","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

Prolonged exposure to low-dose traffic-derived PM2.5 causes fatty liver disorder in mice 长期暴露于低剂量交通来源的PM2.5会导致小鼠脂肪肝疾病

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-27 DOI: 10.1016/j.jes.2025.01.025

Min Feng , Matthew P. Padula , Sara Al Asaad , Xu Bai , Charles Cranfield , Stephanie EL Town , Sonia Saad , Brian G. Oliver , Jacob George , Hui Chen

{"title":"Prolonged exposure to low-dose traffic-derived PM2.5 causes fatty liver disorder in mice","authors":"Min Feng , Matthew P. Padula , Sara Al Asaad , Xu Bai , Charles Cranfield , Stephanie EL Town , Sonia Saad , Brian G. Oliver , Jacob George , Hui Chen","doi":"10.1016/j.jes.2025.01.025","DOIUrl":"10.1016/j.jes.2025.01.025","url":null,"abstract":"<div><div>There is no safe level of exposure to air pollution, including particulate matter smaller than 2.5 µm (PM<sub>2.5</sub>), to human health. Whilst it is well known that exposure to heavily polluted air is associated with several liver disorders, it is unclear how long-term exposure to low-level traffic-derived PM<sub>2.5</sub> affects liver health. BALB/c mice (5 weeks, male) were exposed to traffic-derived PM<sub>2.5</sub> (10 µg/mouse/day, intranasally) daily for 4, 8 and 12 weeks. Markers of inflammation and fibrosis were measured at each time point. Changes in liver proteome and lipid profiles were measured using proteomics and lipidomics at 12 weeks. Low-dose PM<sub>2.5</sub> exposure increased macrophage infiltration, pro-inflammatory cytokine production, and increased collagen deposition at 12 weeks. Despite liver lipid metabolism being increased, the abundance of triglycerides, precursor diacylglycerols, and ceramide was also significantly increased by PM<sub>2.5</sub> exposure, whereas glycogen content was reduced. Proteomics analysis revealed 64 proteins to be significantly changed in PM<sub>2.5</sub>-exposed mice, and KEGG pathway enrichment analysis indicated their involvement in lipid metabolism, alcohol-related liver disease, neutrophil extracellular trap formation, and transcriptional dysregulation related to cancer. In conclusion, prolonged exposure to low-dose traffic-derived PM<sub>2.5</sub> promotes pathological changes in the liver, suggestive of an increased risk of metabolic dysfunction-associated fatty liver disease. Future studies can enable the identification of the signalling pathways underlying low-dose PM<sub>2.5</sub>-induced lipid accumulation in the liver.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 621-632"},"PeriodicalIF":5.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597497","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

Microelectrolysis facilitated the plasmid-mediated horizontal transfer of antibiotic resistance genes at the microbial community level 微电解促进了质粒介导的抗生素耐药基因在微生物群落水平上的水平转移

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-27 DOI: 10.1016/j.jes.2025.01.029

Sizhou Liang , Weiguo Zhang , Philip Semaha , Dominique Rocher , Lizhu Liu , Yan Gao

{"title":"Microelectrolysis facilitated the plasmid-mediated horizontal transfer of antibiotic resistance genes at the microbial community level","authors":"Sizhou Liang , Weiguo Zhang , Philip Semaha , Dominique Rocher , Lizhu Liu , Yan Gao","doi":"10.1016/j.jes.2025.01.029","DOIUrl":"10.1016/j.jes.2025.01.029","url":null,"abstract":"<div><div>The escalating global dissemination of plasmid-mediated antibiotic resistance poses a formidable threat to global health. Conjugation stands as a pivotal mechanism for horizontal gene transfer among bacterial populations, facilitating the spread of antibiotic resistance genes (ARGs). Microelectrolysis has garnered attention as an efficacious strategy for mitigating antibiotic concentrations in wastewater, yet its potential impact on ARG horizontal transfer remain largely unexplored. This comprehensive investigation unveils that microelectrolysis not only influences but significantly accelerates the conjugative transfer of ARG-harboring plasmids. Remarkably, this phenomenon is corroborated at the microbial community scale, underscoring its ecological relevance. Alarmingly, the study highlights the vulnerability of intestinal microorganisms to acquire antibiotic resistance under electrolytic stimulation, posing heightened risks to both animal and human health. Delving deeper, the study elucidates the underlying mechanisms responsible for this enhanced conjugative transfer. It reveals that microelectrolysis augments the abundance of mating-competent cells, triggers the generation of reactive oxygen species, inflicts modest membrane damage, and upregulates the expression of genes critical for conjugation. These findings collectively contribute to a more profound comprehension of the environmental dissemination dynamics and associated public health implications of ARGs in the context of wastewater treatment employing microelectrolytic technologies.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 470-477"},"PeriodicalIF":5.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084288","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

Rapid formation of acetaldehyde and its influence on ozone formation in a petrochemical industrialized region 某石化工业区内乙醛的快速生成及其对臭氧形成的影响

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-27 DOI: 10.1016/j.jes.2025.01.027

Can Cui , Yujiao Zhu , Xiaoyu Yan , Xin Zhang , Min Zhao , Jiangshan Mu , Xuelian Zhong , Jinghao Tang , Yanqiu Nie , Cong An , Wanghui Chu , Yue Sun , Yuhong Liu , Fanyi Shang , Hengqing Shen , Yuanyuan Ji , Likun Xue , Hong Li

{"title":"Rapid formation of acetaldehyde and its influence on ozone formation in a petrochemical industrialized region","authors":"Can Cui , Yujiao Zhu , Xiaoyu Yan , Xin Zhang , Min Zhao , Jiangshan Mu , Xuelian Zhong , Jinghao Tang , Yanqiu Nie , Cong An , Wanghui Chu , Yue Sun , Yuhong Liu , Fanyi Shang , Hengqing Shen , Yuanyuan Ji , Likun Xue , Hong Li","doi":"10.1016/j.jes.2025.01.027","DOIUrl":"10.1016/j.jes.2025.01.027","url":null,"abstract":"<div><div>Acetaldehyde plays a significant role in atmospheric photochemical reactions and ozone formation. Previous studies have shown that acetaldehyde may rapidly be generated over short periods and impact ozone production, yet the underlying mechanism remains unclear. To better elucidate these mechanisms, a field campaign was conducted in Dongying, a typical petrochemical city in China. The observed acetaldehyde concentration averaged 3.0 ± 1.6 ppbv, with a peak around 09:00 local time. The diurnal variations of acetaldehyde were categorized into two types, with Category 1 exhibiting relatively high values and increasing sharply in concentration between 07:00 and 09:00 a.m. (refer to morning peak episode, MPE), and the remaining classified as Category 2. Category 1 was similar to previous studies at heavily polluted sites but differed from cleaner locations. Using an observation-based chemical box model, we found that acetaldehyde contributed an average of 10.2 % to the net ozone production rate. Combined with a positive matrix factorization model, we identified secondary formation as the dominant source of acetaldehyde (45.0 %), and the daytime production rate of acetaldehyde in Category 1 was significantly higher than that in Category 2. <em>Cis</em>-2-butene and <em>trans</em>-2-butene were identified as key precursors for the rapid acetaldehyde formation during the MEP, with the petroleum industry being their primary source. Volatile organic compounds (VOCs) from petroleum industry contributed over 60 % to acetaldehyde formation during the morning peak. Our findings underscore the urgent need for targeted VOCs management strategies in petroleum sector to mitigate both carbonyl and ozone formation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 134-147"},"PeriodicalIF":5.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899598","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

Application of a low-cost and high-efficiency polymer non-catalytic reduction technology for NOx removal in waste-to-energy plant 低成本高效聚合物非催化还原技术在垃圾焚烧发电厂NOx脱除中的应用

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-27 DOI: 10.1016/j.jes.2025.01.026

Shuai Xiao , Congbo Li , Xueyan Zheng , Liya Li , Jingzhong Si , Xiuqi Shu , Xianqiong Zeng

{"title":"Application of a low-cost and high-efficiency polymer non-catalytic reduction technology for NOx removal in waste-to-energy plant","authors":"Shuai Xiao , Congbo Li , Xueyan Zheng , Liya Li , Jingzhong Si , Xiuqi Shu , Xianqiong Zeng","doi":"10.1016/j.jes.2025.01.026","DOIUrl":"10.1016/j.jes.2025.01.026","url":null,"abstract":"<div><div>Ultra-low emission of nitrogen oxide (NO<sub>x</sub>) is an irreversible trend for the development of waste-to-energy industry. But traditional approaches to remove NO<sub>x</sub> face significant challenges, such as low denitration efficiency, complex denitration system, and high investment and operating cost. Here we put forward a novel polymer non-catalytic reduction (PNCR) technology that utilized a new type of polymer agent to remove NO<sub>x</sub>, and the proposed PNCR technology was applied to the existing waste-to-energy plant to test the denitration performance. The PNCR technology demonstrated excellent denitration performance with a NO<sub>x</sub> emission concentration of < 100 mg/Nm<sup>3</sup> and high denitration efficiency of > 75 % at the temperature range of 800–900 °C, which showed the application feasibility even on the complex and unstable industrial operating conditions. In addition, PNCR and hybrid polymer/selective non-catalytic reduction (PNCR/SNCR) technology possessed remarkable economic advantages including low investment fee and low operating cost of < 10 CNY per ton of municipal solid waste (MSW) compared with selective catalytic reduction (SCR) technology. The excellent denitration performance of PNCR technology forebodes a broad industrial application prospect in the field of flue gas cleaning for waste-to-energy plants.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 112-125"},"PeriodicalIF":5.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240420","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

Dynamics of urban carbon emissions: A comparative analysis of pre- and post-lockdown through eddy covariance measurements 城市碳排放动态：通过涡旋相关方差测量对封城前后的比较分析

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-25 DOI: 10.1016/j.jes.2025.01.023

Lu Zhao , Hongxing Zhang , Xu Sun , Binbin Huang , Fei Lu , Xiaoke Wang , Zhiyun Ouyang

{"title":"Dynamics of urban carbon emissions: A comparative analysis of pre- and post-lockdown through eddy covariance measurements","authors":"Lu Zhao , Hongxing Zhang , Xu Sun , Binbin Huang , Fei Lu , Xiaoke Wang , Zhiyun Ouyang","doi":"10.1016/j.jes.2025.01.023","DOIUrl":"10.1016/j.jes.2025.01.023","url":null,"abstract":"<div><div>Urban areas are the major anthropogenic source of atmospheric CO<sub>2</sub>, thus making long-term and continuous observations of their carbon emission dynamics extremely important. The COVID-19 lockdown served as a natural experiment that provided a unique opportunity to analyse the contribution of human activities to CO<sub>2</sub> emissions from urban areas. In 2020, Beijing experienced COVID-19 confinement with different levels of restrictions on social mobility and economic activity, resulting in reductions in CO<sub>2</sub> emissions. To investigate the response mechanisms of CO<sub>2</sub> flux to restriction measures, we analysed CO<sub>2</sub> flux data obtained using the eddy covariance technique from 2015 to 2020, and compared CO<sub>2</sub> flux during the COVID-19 confinement period in 2020 with the preceding years (2015–2019) and across various levels of confinement. The results showed that: (1) the annual CO<sub>2</sub> flux was 2.1 ± 0.2 kg C/(m<sup>2</sup>·yr) in 2020, which showed a significant reduction of 31.8 % compared to the adjacent 2019; (2) the reduction in CO<sub>2</sub> flux was closely related to the level of restrictions on human activities; (3) most reductions occurred during the morning (85.7 %) and evening (32.7 %) peak traffic times, indicating that commuting-related transportation is a primary contributor to urban CO<sub>2</sub> emissions. It is suggested that measures that reduce transportation-related CO<sub>2</sub> sources should be considered as priorities for reducing urban CO<sub>2</sub> emissions. The dynamic variation of urban CO<sub>2</sub> flux captured by the eddy covariance technology is conductive to strengthening the supervision of the implementation of urban carbon emission reduction policies, promoting the achievement of dual carbon goals.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 735-747"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606141","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

UV-light-promoted synthesis of a double Z-scheme BN/C60/g-C3N4 heterojunction with enhanced photodegradation performance for antibiotics 紫外光催化合成双z型BN/C60/g-C3N4异质结，增强抗生素的光降解性能

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-25 DOI: 10.1016/j.jes.2025.01.020

Yong Guo , Haoran Xu , Shugui Hua , Zixuan Xu

{"title":"UV-light-promoted synthesis of a double Z-scheme BN/C60/g-C3N4 heterojunction with enhanced photodegradation performance for antibiotics","authors":"Yong Guo , Haoran Xu , Shugui Hua , Zixuan Xu","doi":"10.1016/j.jes.2025.01.020","DOIUrl":"10.1016/j.jes.2025.01.020","url":null,"abstract":"<div><div>Developing environmental-friendly non-metal photocatalysts for the efficient removal of antibiotics from environment is a significant challenge. The construction of heterojunction is regarded as a powerful strategy to enhance the photodegradation efficiency of photocatalysts for pollutants, being due that this strategy can effectively suppress the recombination of the photo-induced electron and hole. In this research, a novel double Z-scheme BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction was successfully synthesized via one-step synthetic approach. Based on a series of experimental characterization, BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> is most likely formed via the interaction between N element of BN and g-C<sub>3</sub>N<sub>4</sub> with C<sub>60</sub> under UV-light irradiation. The band structures of BN, C<sub>60</sub>, g-C<sub>3</sub>N<sub>4</sub> and the internal electric field among them suggest that BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> may has a direct double z-type band arrangement, which facilitates efficient charge transfer. The photodegradation rate of BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> for tetracycline reached 90.1 %, which is 2.9 times higher than that observed with BN and 2.3 times higher than that of g-C<sub>3</sub>N<sub>4</sub>. BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> exhibits remarkable photocatalytic performance across a wide pH range and in the influence of different anions. This study offers significant insights about how to design double z-scheme metal-free photocatalyst with high photodegradation efficiency for antibiotic.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 686-700"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509228","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

Particulate matter-induced lung cancer metastasis is inhibited by ginsenoside Rg3 人参皂苷Rg3对颗粒物诱导肺癌转移的抑制作用

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-25 DOI: 10.1016/j.jes.2025.01.022

Youn Jung Lee , Seung-Ho Park , Bumjo Oh , Sung-Jin Yoon , Seon-Jin Lee , Song Choi , Min Jeong Kim , Jinhee Kim , Young-Lai Cho , Wantae Kim , Bon Jeong Ku , Young-Jun Park

{"title":"Particulate matter-induced lung cancer metastasis is inhibited by ginsenoside Rg3","authors":"Youn Jung Lee , Seung-Ho Park , Bumjo Oh , Sung-Jin Yoon , Seon-Jin Lee , Song Choi , Min Jeong Kim , Jinhee Kim , Young-Lai Cho , Wantae Kim , Bon Jeong Ku , Young-Jun Park","doi":"10.1016/j.jes.2025.01.022","DOIUrl":"10.1016/j.jes.2025.01.022","url":null,"abstract":"<div><div>The risk of exposure to particulate matter (PM) has been consistently highlighted globally owing to its detrimental effects on the respiratory and cardiovascular systems and in the development of lung cancer. Additionally, PM promotes cancer cell metastasis; however, research elucidating the precise mechanisms underlying this phenomenon and the strategies to inhibit it remains limited. The aim of this study was to elucidate the mechanism underlying PM-induced cancer metastasis and investigate the preventive role of ginsenoside Rg3. We treated macrophages with PM and confirmed an increase in the expression and secretion of chemokines, such as CCL3, CCL4, and CCL5. This effect was mediated by the MAPK and NF-kB pathways, and Rg3 inhibited this process by suppressing chemokine expression. These chemokines regulate the expression of epithelial-mesenchymal transition (EMT) markers in cancer cells, including Snail, Slug, ZEB1, and E-cadherin. The regulated EMT markers increased the motility of cancer cells in vitro. Furthermore, an increase in CCL3, CCL4, and CCL5 in the bronchoalveolar lavage fluid (BALF) was confirmed in a PM inhalation mouse model, and Rg3 reduced PM-induced cancer metastasis. The study findings suggest the potential use of Rg3 as a therapeutic agent to prevent PM-induced cancer metastasis.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 60-71"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230565","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

pH-dependent reaction kinetics between glyoxal and ammonium sulfate in simulated cloud droplets 模拟云滴中乙二醛和硫酸铵的ph依赖性反应动力学

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-25 DOI: 10.1016/j.jes.2025.01.024

Kun Liu , Tao Wang , Guohua Zhang , Wei Sun , Ye Yang , Mingjin Tang , Xinming Wang , Xinhui Bi

{"title":"pH-dependent reaction kinetics between glyoxal and ammonium sulfate in simulated cloud droplets","authors":"Kun Liu , Tao Wang , Guohua Zhang , Wei Sun , Ye Yang , Mingjin Tang , Xinming Wang , Xinhui Bi","doi":"10.1016/j.jes.2025.01.024","DOIUrl":"10.1016/j.jes.2025.01.024","url":null,"abstract":"<div><div>Aqueous-phase reactions between carbonyls and reduced nitrogen compounds play a considerable role in the formation of secondary organic aerosols and brown carbon in the atmosphere. However, the reported reaction rate constants for these reactions have largely been limited to bulk aqueous-phase simulations, which may not accurately represent the real state of atmospheric cloud droplets. We employed an integration of optical tweezers and Raman spectroscopy to manipulate and analyze simulated cloud droplets (size range 8000–10,000 nm), comprising a mixture of glyoxal and ammonium sulfate. This approach enabled us to delve into the intricate realm of their reaction kinetics at individual droplet level mimicking cloud droplets. Raman spectroscopy provided high temporal resolution (20 s) measurements of the changes in the amount of nitrogen-containing organics (or NOCs as represented by the C<img>N bond) within the droplets. The results indicate that the reaction follows first-order kinetics throughout the monitoring over 80–400 mins. The average reaction rate constant for the formation of NOCs within the single droplet was determined to be (6.77 ± 0.98) × 10<sup>−5</sup> s<sup>−1</sup>, up to three orders of magnitude higher than those through the bulk aqueous-phase simulations, especially at lower pH levels. Additionally, the reaction rate constant in single droplet increases with increasing pH, consistent with the trend previously reported for the bulk aqueous-phase simulations. The results highlight the difference of the reaction rate constant between bulk aqueous-phase and droplets, which would improve our understanding on the formation and impacts of secondary organic aerosols and brown carbon in atmospheric aqueous phase.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 686-693"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604898","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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