IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c02926

Wenqing Ding, Yu Fu, Huibin Liu, Tongliang Zhang, Yu Sun, Zhongqi Liu, Sen Xue, Xuewang Han, Jinpeng Du, Peirong Chen, Yulong Shan, Yunbo Yu, Hong He

{"title":"SO2 Poisoning, Regeneration, and Impact on Dimer-Cu Intermediates in the NH3-SCR Reaction over Cu-Zeolites","authors":"Wenqing Ding, Yu Fu, Huibin Liu, Tongliang Zhang, Yu Sun, Zhongqi Liu, Sen Xue, Xuewang Han, Jinpeng Du, Peirong Chen, Yulong Shan, Yunbo Yu, Hong He","doi":"10.1021/acs.est.5c02926","DOIUrl":"https://doi.org/10.1021/acs.est.5c02926","url":null,"abstract":"This study demonstrates that Al-rich, high-Cu-loaded Cu-SSZ-13 exhibits superior resistance to SO2 poisoning under actual SCR conditions. The high Cu content mitigates the risk of SO2-induced structural degradation. A key finding is that lower regeneration temperatures can lead to more severe secondary poisoning, while high temperatures induce hydrothermal aging. Thus, controlling the regeneration temperature is critical for maintaining long-term catalyst stability. Additionally, experimental results and DFT calculations show that SO2 preferentially reacts with dimer-Cu species, especially hydrogenated dimer-Cu ([CuII2(NH3)4(OH)O]+), resulting in significant sulfate accumulation. This interaction inhibits the redox cycle of Cu+/Cu2+, thereby suppressing low-temperature activity. Overall, this work elucidates the mechanisms of SO2-induced deactivation in Cu-zeolite SCR catalysts and provides valuable insights into designing Cu-SSZ-13 catalysts with enhanced sulfur resistance through Cu-Al co-optimization.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"27 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176931","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}

引用次数: 0

Molecular Insights into Novel Struvite–Hydrogel Composites for Simultaneous Ammonia and Phosphate Removal 同时去除氨和磷酸盐的新型鸟粪石-水凝胶复合材料的分子见解

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.4c11700

Minkyoung Jung, Ying Wang, Jan Ilavsky, Yinjie J. Tang, Young-Shin Jun

{"title":"Molecular Insights into Novel Struvite–Hydrogel Composites for Simultaneous Ammonia and Phosphate Removal","authors":"Minkyoung Jung, Ying Wang, Jan Ilavsky, Yinjie J. Tang, Young-Shin Jun","doi":"10.1021/acs.est.4c11700","DOIUrl":"https://doi.org/10.1021/acs.est.4c11700","url":null,"abstract":"Struvite (NH4MgPO4·6H2O) mineralization is an effective technique for removing ammonium and phosphate species from wastewater. However, its wider use faces obstacles because of the copresence of various pollutants in wastewater and the additional requirement for magnesium to achieve proper supersaturation conditions. To address these challenges, this study developed novel mineral–hydrogel composites that can remove ammonium and phosphate simultaneously via heterogeneous struvite and calcium phosphate (CaP) mineralization in hydrogel matrices. The composites include in situ formed struvite and CaP mineral seeds, decreasing the nucleation energy barrier of struvite and CaP formation and promoting their heterogeneous nucleation kinetics even under undersaturation conditions in bulk solution. The dual struvite and CaP seeded composites can simultaneously reduce the ammonium and total phosphate concentrations up to 60% (26.3 mg of N/g) and 91% (9.54 mg of P/g), respectively. The average particle sizes in composites were increased from 6.12 to 14.8 nm after wastewater treatment. Moreover, various ions commonly existing in wastewater did not significantly interfere with the removal of ammonium and phosphate. Thus, these new mineral–hydrogel composites can provide an innovative way to lower nutrient levels before discharge to streams. Moreover, encapsulating ammonium and phosphate in mineral-hydrogel composites enables their upcycling in agricultural or biorefinery applications.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"1 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165433","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}

引用次数: 0

Scalable Production of Hygroscopic Gel Spheres to Enhance Seedling Growth via Atmospheric Water Harvesting and Controlled Fertilizer Release 可扩展生产吸湿凝胶球，通过大气集水和控制肥料释放促进幼苗生长

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c02795

Xiangbing Wang, Kanjun Sun, Hui Peng, Zhe Zhang, Wenxu Zhang, Guofu Ma

{"title":"Scalable Production of Hygroscopic Gel Spheres to Enhance Seedling Growth via Atmospheric Water Harvesting and Controlled Fertilizer Release","authors":"Xiangbing Wang, Kanjun Sun, Hui Peng, Zhe Zhang, Wenxu Zhang, Guofu Ma","doi":"10.1021/acs.est.5c02795","DOIUrl":"https://doi.org/10.1021/acs.est.5c02795","url":null,"abstract":"Atmospheric water harvesting (AWH) technologies offer potential solutions for alleviating agricultural water scarcity. However, it faces significant challenges, including environmental compatibility, scalability, and multifunctional integration. Therefore, there is an urgent need for novel strategies to improve agricultural water use efficiency. Herein, natural polysaccharides sodium alginate (SA) and thermoresponsive hydroxypropyl cellulose (HPC) are selected as the matrix, with SA cross-linking with Ca2+ to enable rapid gelation and continuous production of shape-controllable spheres. Additionally, carbon black (CB) and urea are incorporated through physical doping and chemical interactions to enable solar energy collection and slow-release fertilization. The synergistic effect of the hygroscopic salt and porous matrix resulted in water uptake of 0.64–3.38 g g–1 at 30–90% relative humidity. The photothermal of CB, combined with the low-temperature phase transition of HPC, facilitated low-temperature desorption and rapid solar-driven water release, achieving maximum desorption rate of 4.07 g g–1 h–1. Notably, as water was released from the material and the matrix degraded, urea was gradually discharged, with release of 224.6 ± 5.2 mg kg–1 over 30 days, providing sustained support for crop growth. This innovative approach provides sustainable and geographically unconstrained solution for agricultural water management in arid regions.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"49 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176924","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}

引用次数: 0

Microbial Dysbiosis in the Lung and Gut in Response to Inhalable Particulate Matters in Pneumoconiosis Patients and Animals 尘肺患者和动物可吸入颗粒物对肺和肠道微生物生态失调的影响

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c00798

Huimin Ma, Zheng Dong, Xu Zhang, Ning Li, Conghe Liu, Xi Zhou, Jin He, Juan Ma, Shuping Zhang, Haidong Kan, Sijin Liu

{"title":"Microbial Dysbiosis in the Lung and Gut in Response to Inhalable Particulate Matters in Pneumoconiosis Patients and Animals","authors":"Huimin Ma, Zheng Dong, Xu Zhang, Ning Li, Conghe Liu, Xi Zhou, Jin He, Juan Ma, Shuping Zhang, Haidong Kan, Sijin Liu","doi":"10.1021/acs.est.5c00798","DOIUrl":"https://doi.org/10.1021/acs.est.5c00798","url":null,"abstract":"Pneumoconiosis is a progressive and life-threatening fibrotic lung disorder caused by the prolonged deposition of inhaled particulate matters (PMs); thus far, no cure is available. Emerging evidence has suggested that the resulting disordered respiratory microbiome is caused by disturbed lung architecture and homeostasis responding to inhalable PMs. Lung microbiome dysbiosis also contributes to injury to the lung and distant organs, such as the intestine, through the lung–gut axis. Current studies on the microbiome–disease interplay are still in their infancy, and sufficient understanding of microbial heterogeneity in pathological processes is lacking. Here we investigated the microbiome in the lung and gut of patients with pneumoconiosis in comparison to healthy individuals. Our findings indicated reciprocal causation between lung injuries and microbial dysbiosis under particle exposure; pulmonary Streptococcus and Stenotrophomonas, along with intestinal Ligilactobacillus and Blautia, may represent key microbial communities influencing pneumoconiosis progression. We defined close microbiota crosstalk between the lung and gut, as evidenced by their interaction networks, implying considerable effects on the gut microenvironment through either direct microbial translocation or other mechanisms such as inflammation-driven alterations. Animal experiments further corroborated the findings in humans. Collectively, our results highlight the potential involvement of the lung–gut axis microbial dysbiosis in pneumoconiosis pathogenesis and open a new avenue to develop microbiome-targeted diagnosis and treatment strategies.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"49 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165428","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}

引用次数: 0

Contribution of Microbial Metabolism to Geogenic Phosphorus Enrichment in Groundwater: Insights from Metagenomic Sequencing and Organic Molecular Characterization 微生物代谢对地下水地源性磷富集的贡献：来自宏基因组测序和有机分子表征的见解

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c02169

Junna Ning, Yao Du, Jin Wang, Wenhui Liu, Yamin Deng, Yiqun Gan, Yanxin Wang

{"title":"Contribution of Microbial Metabolism to Geogenic Phosphorus Enrichment in Groundwater: Insights from Metagenomic Sequencing and Organic Molecular Characterization","authors":"Junna Ning, Yao Du, Jin Wang, Wenhui Liu, Yamin Deng, Yiqun Gan, Yanxin Wang","doi":"10.1021/acs.est.5c02169","DOIUrl":"https://doi.org/10.1021/acs.est.5c02169","url":null,"abstract":"Microbial mediation in the enrichment of geogenic phosphorus (P) is often mentioned but rarely explored, especially in P enrichment processes through the mineralization of dissolved organic matter (DOM) containing natural P. To bridge the theoretical gap, this study investigated the mechanisms of P enrichment through microbially mediated mineralization of natural P-containing DOM by adopting an approach combining comprehensive field investigation with hydrochemical and molecular biological analyses. The co-analysis of the dominant microbial community compositions and genomics revealed that the microbial metabolism pathways involved in the biodegradation of P-containing DOM were associated with the enrichment level of dissolved inorganic phosphorus (DIP). Specifically, dephosphorylation was more pronounced under conditions of limited DIP, while C–P bond cleavage was the primary metabolic pathway under sufficient DIP. Co-occurrence network analysis further indicated that the substrates for DIP enrichment differed between dephosphorylation and C–P bond cleavage, namely CHONSP1 compounds in the region of highly unsaturated-low O compounds (AI ≤ 0.5, H/C < 1.5, and O/C < 0.4) and CHOP1 compounds in the region of highly unsaturated-high O compounds (AI ≤ 0.5, H/C < 1.5, and O/C ≥ 0.4), respectively. These findings provide new insights into geogenic P enrichment in groundwater from the perspective of microbial metabolism and have potential implications for the bioremediation of P-contaminated groundwater at different contamination levels.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"57 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176923","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}

引用次数: 0

Pollution-Carbon Synergy Significantly Enhances the Capability of Tracking Power Plants’ CO2 Emissions from Space 污染-碳协同效应显著增强电厂空间CO2排放跟踪能力

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c01100

Donghao Fan, Tianhai Cheng, Hao Zhu, Xiaotong Ye, Tao Tang, Haoran Tong, Xingyu Li, Lili Zhang

{"title":"Pollution-Carbon Synergy Significantly Enhances the Capability of Tracking Power Plants’ CO2 Emissions from Space","authors":"Donghao Fan, Tianhai Cheng, Hao Zhu, Xiaotong Ye, Tao Tang, Haoran Tong, Xingyu Li, Lili Zhang","doi":"10.1021/acs.est.5c01100","DOIUrl":"https://doi.org/10.1021/acs.est.5c01100","url":null,"abstract":"The potential of satellite-based CO2 emission estimation from power plants is gaining increasing attention. However, the limited spatiotemporal coverage of current satellite-derived XCO2 data poses significant challenges to tracking CO2 variations on a large scale and over extended periods. In view of this, this study uses satellite-derived NO2 data as a suitable proxy and tracks CO2 emissions from 38 selected power plants globally by integrating near-synchronously observed TROPOMI NO2 data and OCO-2 XCO2 data. The results show that our method significantly increases the effective observation frequency by almost 200 times compared to using OCO-2 data alone. Compared to the emissions reported by the power plants, the correlation coefficient of the method used in this study (0.78) is higher than that of the emission inventory estimates (0.43–0.62), resulting in an accuracy improvement of approximately 1.8–2.3 Mt/yr per power plant. The use of satellite-derived NO2 data significantly enhances the ability to remotely estimate CO2 emissions from power plants, which gives us confidence in studying anthropogenic point-source CO2 emissions across different spatial and temporal scales. This enhances the understanding of their variability and mitigation potential, supporting the development of refined carbon inventories and advanced carbon cycle assimilation systems.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"1 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176930","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}

引用次数: 0

Unraveling the Molecular Links between Fine Particulate Matter Exposure and Early Birth Risks in African American Mothers: A Metabolomics Study in the Atlanta African American Maternal-Child Cohort 揭示非裔美国母亲细颗粒物暴露与早产风险之间的分子联系：亚特兰大非裔美国母婴队列的代谢组学研究

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c02071

Zhenjiang Li, Anne L. Dunlop, Jeremy A. Sarnat, Anke Hüls, Stephanie M. Eick, Audrey Gaskins, Howard Chang, Armistead Russell, Youran Tan, Haoran Cheng, Dana Boyd Barr, Alicia K. Smith, Carmen Marsit, Dean P. Jones, Donghai Liang

{"title":"Unraveling the Molecular Links between Fine Particulate Matter Exposure and Early Birth Risks in African American Mothers: A Metabolomics Study in the Atlanta African American Maternal-Child Cohort","authors":"Zhenjiang Li, Anne L. Dunlop, Jeremy A. Sarnat, Anke Hüls, Stephanie M. Eick, Audrey Gaskins, Howard Chang, Armistead Russell, Youran Tan, Haoran Cheng, Dana Boyd Barr, Alicia K. Smith, Carmen Marsit, Dean P. Jones, Donghai Liang","doi":"10.1021/acs.est.5c02071","DOIUrl":"https://doi.org/10.1021/acs.est.5c02071","url":null,"abstract":"In the United States, African Americans (AA) are disproportionately exposed to elevated levels of ambient fine particulate matter (PM2.5) while suffering from the highest rates of early births. To elucidate the largely unknown underlying mechanism, we analyzed serum metabolomics from 330 participants in the Atlanta AA Maternal-Child Cohort and performed high-throughput mediation analysis to identify intermediate metabolites and pathways linking PM2.5 to early births. Energy-metabolism-related metabolites (carnitine and adenosine triphosphate), along with lysoPE(20:3) and acetylcysteine, were both associated with PM2.5 exposure and elevated early birth risks. Perturbations in protein digestion and absorption and aromatic amino acid (phenylalanine, tyrosine, and tryptophan) metabolism may potentially mediate the associations between PM2.5 and early births. We identified significant indirect effects of cortexolone (Proportion mediated: −11.8%) and lysoPE(20:3) (9.4%) in mediating the relationship between PM2.5 and early births. Our findings might aid in early birth prevention among AA communities by providing novel insights into the underlying biological mechanism.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"1 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165434","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}

引用次数: 0

Boosting the Photothermal Oxidation of Multicomponent VOCs in Humid Conditions: Synergistic Mechanism of Mn and K in Different Oxygen Activation Pathways 湿润条件下促进多组分VOCs光热氧化：Mn和K在不同氧活化途径中的协同机制

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c00953

Yang Yang, Fukun Bi, Jiafeng Wei, Xiao Han, Bin Gao, Rong Qiao, Jingcheng Xu, Ning Liu, Xiaodong Zhang

{"title":"Boosting the Photothermal Oxidation of Multicomponent VOCs in Humid Conditions: Synergistic Mechanism of Mn and K in Different Oxygen Activation Pathways","authors":"Yang Yang, Fukun Bi, Jiafeng Wei, Xiao Han, Bin Gao, Rong Qiao, Jingcheng Xu, Ning Liu, Xiaodong Zhang","doi":"10.1021/acs.est.5c00953","DOIUrl":"https://doi.org/10.1021/acs.est.5c00953","url":null,"abstract":"The complexity of actual industrial emissions has brought significant challenges for volatile organic compounds (VOCs) purification. Herein, Mn and K atoms were incorporated into Co3O4/TiO2 through theoretical study, and its excellent properties were verified in experiments. The different pathways of oxygen activation by Mn and K were revealed by characterization experiments and theoretical calculations. Mn species effectually reduced the dissociation energy barrier of H2O adsorbed on the surface, and the surface hydroxyl group promoted the dissociation of O2 and the formation of •O2– under light and humid conditions. The introduction of K promoted the formation of more oxygen vacancies, which served as adsorption sites for gaseous O2. Meanwhile, the electron transfer accelerated by K contributed to the activation of H2O and the rapid production of •OH under light. The synergistic effect of Mn and K successfully achieved simultaneous improvements in the activity, stability, and water resistance of Co3O4/TiO2. Furthermore, the catalyst was applied to the degradation of multicomponent VOCs, and the reaction path was analyzed through the test of intermediates, along with an investigation of the interaction among different types of VOCs. This study provided a new idea for the theoretical optimization of polymetallic catalysts and the analysis of degradation paths for multicomponent VOCs.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"40 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165429","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}

引用次数: 0

Natural Iron Fertilization Moderates Hydrothermal Mercury Inputs from Arc Volcanoes 天然铁肥调节弧火山热液汞输入

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-29 DOI: 10.1021/acs.est.5c01767

Natalia Torres-Rodriguez, Jingjing Yuan, Aurélie Dufour, Igor Živković, David Point, Cédric Boulart, Joël Knoery, Milena Horvat, David Amouroux, Sophie Bonnet, Cécile Guieu, Ruoyu Sun, Lars-Eric Heimbürger-Boavida

{"title":"Natural Iron Fertilization Moderates Hydrothermal Mercury Inputs from Arc Volcanoes","authors":"Natalia Torres-Rodriguez, Jingjing Yuan, Aurélie Dufour, Igor Živković, David Point, Cédric Boulart, Joël Knoery, Milena Horvat, David Amouroux, Sophie Bonnet, Cécile Guieu, Ruoyu Sun, Lars-Eric Heimbürger-Boavida","doi":"10.1021/acs.est.5c01767","DOIUrl":"https://doi.org/10.1021/acs.est.5c01767","url":null,"abstract":"Methylmercury is a bioaccumulative neurotoxin that poses severe risks to marine ecosystems and human health worldwide. Hydrothermal systems and submarine volcanoes are natural sources of mercury, yet the magnitude of emissions, their transport, and their impact on marine ecosystems remain poorly understood. Quantifying natural mercury fluxes is essential to understanding anthropogenic perturbations and guiding effective reduction strategies. We investigate hydrothermal mercury inputs at the Tonga volcanic arc and their impact on the local ecosystem. Our results show that hydrothermal and volcanic activity in the Tonga Arc increases mercury concentrations in seawater. Comprehensive surveys identified mercury-rich plumes (up to 22.7 pmol L–1) associated with high mercury fluxes (4763 pmol m–2 day–1) reaching productive surface waters, resulting in an estimated total flux of 4.23 t y–1 for the entire Tonga Arc. Despite these significant inputs, mercury concentrations in phytoplankton remain unexpectedly low. We demonstrate that phytoplankton blooms, stimulated by natural iron fertilization from hydrothermal sources, dilute mercury at the cellular level, reducing the impact of hydrothermal mercury. Additionally, we provide a revised global estimate of hydrothermal mercury inputs with a maximum of 120 t y–1, which is considerably lower than atmospheric and riverine inputs to the ocean.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"16 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165430","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}

引用次数: 0

Direct Quantification of Ion Partitioning and Diffusion Resistances in Reverse Osmosis Membranes via Electrochemical Impedance Spectroscopy 利用电化学阻抗谱法直接定量测定反渗透膜中的离子分配和扩散阻力

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-05-28 DOI: 10.1021/acs.est.5c01683

Xueye Wang, Wanting Kong, Xiaohu Zhai, Zhiwei Wang, Razi Epsztein, Xuesong Li

{"title":"Direct Quantification of Ion Partitioning and Diffusion Resistances in Reverse Osmosis Membranes via Electrochemical Impedance Spectroscopy","authors":"Xueye Wang, Wanting Kong, Xiaohu Zhai, Zhiwei Wang, Razi Epsztein, Xuesong Li","doi":"10.1021/acs.est.5c01683","DOIUrl":"https://doi.org/10.1021/acs.est.5c01683","url":null,"abstract":"Polyamide (PA) reverse osmosis (RO) membranes are crucial for water desalination and purification, where salt ion transport is governed by partitioning and diffusion through the PA film. Despite extensive research, decoupling these two steps and quantifying their relative contributions remain challenging due to the lack of reliable characterization methods. Here, we develop a rapid, reproducible electrochemical impedance spectroscopy (EIS) protocol incorporating advanced electrical equivalent circuits to directly quantify partitioning and diffusion resistance. Its validity is verified through membrane filtration experiments and activation energy analysis. Our findings reveal that diffusion dominates ion transport resistance, with values 4.5 to 6.0 times higher than partitioning resistance across diverse monovalent cations. However, we discovered a critical concentration-dependent behavior where partitioning resistance becomes increasingly significant at lower electrolyte concentrations, eventually equaling diffusion resistance near 0.1 mM. We also uncovered that the anomalously low rejection of NH4+ of RO membranes stemmed from significantly reduced diffusion resistance, likely due to moderate hydrogen-bonding interactions with membrane pores or its tetrahedral geometry. This quantitative insight into transport resistance mechanisms establishes new design principles for next-generation RO membranes, enabling tailored strategies for applications ranging from high-salinity desalination to the removal of low-concentration micropollutants.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"82 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154109","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}

引用次数: 0

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