环境科学与技术最新文献

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Organic Micropollutants in Waterways of a Large-Scale Water Diversion Project: Insights from Nontarget Screening and "Community" Analysis.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-31 DOI: 10.1021/acs.est.4c10123
Yitao Lyu, Dantong Jia, Moran Tang, Jingrun Hu, Wei Zhang, Weiling Sun, Jinren Ni
{"title":"Organic Micropollutants in Waterways of a Large-Scale Water Diversion Project: Insights from Nontarget Screening and \"Community\" Analysis.","authors":"Yitao Lyu, Dantong Jia, Moran Tang, Jingrun Hu, Wei Zhang, Weiling Sun, Jinren Ni","doi":"10.1021/acs.est.4c10123","DOIUrl":"10.1021/acs.est.4c10123","url":null,"abstract":"<p><p>Large-scale water diversion projects are essential for meeting the needs of water-stressed regions, necessitating an evaluation of their impact on water quality and aquatic ecosystems. This study provides the first snapshots of organic micropollutants (OMPs) along the 1466 km Eastern Route of China's South-to-North Water Diversion Project. Using nontarget analysis with ultrahigh-performance liquid chromatography and high-resolution mass spectrometry, we identified and quantified 357 OMPs from water samples collected during the water diversion period (WDP) and the nonwater diversion period (NWDP). The OMPs included 136 household compounds, 112 agricultural compounds, 102 industrial compounds, and 7 traffic markers. Significant regional variations in OMP concentrations and compositions were observed during the NWDP due to diverse local pollution sources along the route. However, such differences were reduced during the WDP, likely due to water transfer. OMP diversity varied substantially during the NWDP but was more stable with less distance decay during the WDP. Network analysis indicated closer relationships between the OMPs during the WDP, suggesting a more consistent spatial distribution. The source water overwhelmingly influenced the water quality along the diversion route. These findings underscore the need for ongoing assessments of the impact of water diversion on regional water quality and ecosystems.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"2765-2777"},"PeriodicalIF":10.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062296","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
Recent Advances of Gaseous Pollutant Catalytic Oxidation over Precious Metal Catalysts with SO2 Exposure.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-30 DOI: 10.1021/acs.est.4c13228
Cangpeng Shan, Xinyu Hou, Rui Han, Qinwei Jia, Ning Hou, Yunchong Wang, Caixia Liu, Qingling Liu
{"title":"Recent Advances of Gaseous Pollutant Catalytic Oxidation over Precious Metal Catalysts with SO<sub>2</sub> Exposure.","authors":"Cangpeng Shan, Xinyu Hou, Rui Han, Qinwei Jia, Ning Hou, Yunchong Wang, Caixia Liu, Qingling Liu","doi":"10.1021/acs.est.4c13228","DOIUrl":"10.1021/acs.est.4c13228","url":null,"abstract":"<p><p>Precious metal catalysts are widely used for catalytic oxidation of various gaseous pollutants (CO, methane, and VOCs) due to their excellent catalytic activity. However, they are easily affected by SO<sub>2</sub> and deactivated in actual industrial waste gas or motor vehicle exhaust. Therefore, this review systematically summarizes the representative studies of gaseous pollutant catalytic oxidation over precious metal catalysts with SO<sub>2</sub> exposure. First, the sulfur influence mechanisms, including sulfur poisoning and sulfur promotion, as well as the influence of reaction conditions, were discussed to analyze the interaction between SO<sub>2</sub> and catalysts and its impact on catalyst properties. Based on the sulfur poisoning process, we further summarized the design strategies of sulfur-resistant catalysts: suppressing the adsorption of SO<sub>2</sub> and promoting its desorption, inhibiting the formation of sulfates and facilitating their decomposition, and constructing sacrificial sites, which can be achieved by corresponding design methods: constructing a core-shell/confined structure, dopant modification, and adjusting structural and textural properties. Furthermore, we analyzed feasible catalyst regeneration methods, including N<sub>2</sub>/O<sub>2</sub> atmosphere regeneration, reducing atmosphere-assisted regeneration, and washing regeneration. Finally, the challenges and prospects of the research were proposed, hoping to provide new perspectives on understanding sulfur poisoning processes and guide the design and regeneration of sulfur-resistant catalysts.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"2348-2367"},"PeriodicalIF":10.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062306","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
Rebuttal to Correspondence on “Theoretical Threshold for Estimating the Impact of Ventilation on Materials’ Emissions”
IF 9.028 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 DOI: 10.1021/acs.est.5c01042
Fredrik Domhagen, Sarka Langer, Angela Sasic Kalagasidis
{"title":"Rebuttal to Correspondence on “Theoretical Threshold for Estimating the Impact of Ventilation on Materials’ Emissions”","authors":"Fredrik Domhagen, Sarka Langer, Angela Sasic Kalagasidis","doi":"10.1021/acs.est.5c01042","DOIUrl":"https://doi.org/10.1021/acs.est.5c01042","url":null,"abstract":"We respond here to the correspondence by Deng et al. on our study. (1) In this study, we show that the effect of increased ventilation has a negligible impact on the emission rates after the initial, near surface VOC has been emitted, which typically takes a few hours to a few days. The conclusions are drawn on the basis of available material data together with an analytical model that describes the material emission rates in a ventilated room. The simplifications made in the model are consciously chosen to give an upper limit (or worst case) for the relation between ventilation rates and emissions. Near surface resistance and room air buffering capacity (which have short-term effects on room concentration) are neglected. Also, materials are assumed to be semi-infinite, which gives an upper limit for the emission rates (materials are never depleted). Deng et al. raise concerns that neglecting the room buffering capacity may lead to faulty conclusions regarding the effect of increased ventilation rates on emission rates. Instead, they propose an extended version of our model, which also accounts for the room buffering capacity. The proposed model in the Laplace domain is Deng et al. also give three solutions, depending on the relation between &lt;i&gt;t&lt;/i&gt;&lt;sub&gt;c&lt;/sub&gt; and &lt;i&gt;t&lt;/i&gt;&lt;sub&gt;V&lt;/sub&gt;, to eq 2. Unfortunately, the solutions are not as straightforward to compute as the simple case in which the room capacity is neglected. The question is whether accounting for the room buffering capacity is necessary for determining the effect of increased ventilation on emissions from materials. Ventilation rates in residential and office buildings are typically ≥0.5 air change per hour, which gives a &lt;i&gt;t&lt;/i&gt;&lt;sub&gt;V&lt;/sub&gt; of ≤2 h. In other words, the relevant time scale for the room storage capacity is a few hours or less. The emission decline from new materials, on the contrary, is typically much longer, ranging from a couple of weeks to a couple of months. As an illustration, consider a room with dimensions of 4 m × 5 m × 3 m in which all four walls consist of gypsum boards that emit VOC. The total room air volume is then 60 m&lt;sup&gt;3&lt;/sup&gt;, and the total emitting area is 54 m&lt;sup&gt;2&lt;/sup&gt;. Figure 1 shows a simulation of the concentration in the room using both the model proposed by Deng et al. and the model proposed by Domhagen et al. (1) In the simulations, the emitted VOC is benzaldehyde and the following material properties are used: &lt;i&gt;D&lt;/i&gt;&lt;sub&gt;m&lt;/sub&gt; = 3.93 × 10&lt;sup&gt;–11&lt;/sup&gt; m&lt;sup&gt;2&lt;/sup&gt;/s, and &lt;i&gt;K&lt;/i&gt;&lt;sub&gt;ma&lt;/sub&gt; = 10 053. (2) The room is ventilated with 0.5 air change per hour, and the time constants are as follows: &lt;i&gt;t&lt;/i&gt;&lt;sub&gt;V&lt;/sub&gt; = 2 h, and &lt;i&gt;t&lt;/i&gt;&lt;sub&gt;c&lt;/sub&gt; = 46 h. Note that benzaldehyde diffusion in gypsum is the material–VOC combination that is identified as the most critical by Domhagen et al. (1) Figure 1. Simulations showing concentrations of benzaldehyde in a ventilated room. Figure 2 shows the results from simulations in which ethyl","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"84 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385259","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
Incorporating Transformation Products for an Integrated Assessment of Antibiotic Pollution and Risks in Surface Water.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-30 DOI: 10.1021/acs.est.4c12926
Jingrun Hu, Yitao Lyu, Yi Liu, Xiuqi You, Damian E Helbling, Weiling Sun
{"title":"Incorporating Transformation Products for an Integrated Assessment of Antibiotic Pollution and Risks in Surface Water.","authors":"Jingrun Hu, Yitao Lyu, Yi Liu, Xiuqi You, Damian E Helbling, Weiling Sun","doi":"10.1021/acs.est.4c12926","DOIUrl":"10.1021/acs.est.4c12926","url":null,"abstract":"<p><p>The widespread presence of antibiotics in aquatic ecosystems is a global challenge, yet the occurrence and risks associated with their transformation products (TPs) remain poorly understood. This study investigated the occurrence and potential risks of antibiotics and their TPs in water along the Chaobai River in Beijing. We used high-resolution mass spectrometry and an integrated target, suspect, and nontarget screening approach to identify 21 parent antibiotics and 78 TPs among 90 water samples, with the majority from macrolides and sulfonamides. Notably, target quantification and machine-learning-assisted semiquantification revealed that the cumulative concentrations of TPs were higher than the cumulative concentrations of parent compounds, with average contributions of TPs ranging between 50.7 and 63.7%. Most downstream water samples were largely influenced by domestic sewage, as indicated by the significantly higher concentrations and proportions of TPs, as well as the greater diversity in their composition profiles compared to upstream and reservoir samples. Moreover, of the 78 TPs, 26.9, 67.9, and 6.4% exhibited greater persistence, mobility, or toxicity than their parent antibiotics, respectively. Sixteen macrolide TPs presented both greater ecological risks to aquatic organisms and higher resistance selection risks than their parent antibiotics. TPs contributed substantially to the overall antibiotic-related risks by an average of between 31.2 and 54.1%. This study highlights the occurrence of antibiotic TPs in river water, underscoring the need to consider TPs in comprehensive risk assessments of antibiotics.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"2815-2826"},"PeriodicalIF":10.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062258","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
Quantitative Enhancement of Arsenate Immobilization Induced by Vacancy Defects on Various Exposed Lattice Facets of Hematite.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-31 DOI: 10.1021/acs.est.4c11344
Juan Liu, Jingtao Hou, Juan Xiong, Lu Ren, Mingxia Wang, Wenfeng Tan, Andreas Kappler
{"title":"Quantitative Enhancement of Arsenate Immobilization Induced by Vacancy Defects on Various Exposed Lattice Facets of Hematite.","authors":"Juan Liu, Jingtao Hou, Juan Xiong, Lu Ren, Mingxia Wang, Wenfeng Tan, Andreas Kappler","doi":"10.1021/acs.est.4c11344","DOIUrl":"10.1021/acs.est.4c11344","url":null,"abstract":"<p><p>Defects are common features in hematite that arise from deviations from the perfect mineral crystal structure. Vacancy defects have been shown to significantly enhance arsenate (As) immobilization by hematite. However, the contributions from vacancy defects on different exposed facets of hematite have not been fully quantified. In this study, hematite samples with various morphologies were pretreated with sodium borohydride (NaBH<sub>4</sub>) to generate oxygen vacancy defects (OVDs), analyzed quantitatively using extended X-ray absorption fine structure (EXAFS) and thermogravimetric analysis (TG). Batch experiments revealed that the OVDs on different exposed facets showed significant variations in improving arsenate adsorption, i.e., the quantitative enhancement of arsenate adsorption amount per unit OVD concentration (Δ<i>Q</i><sub>m</sub>/<i>C</i><sub>defect</sub>) followed the sequence of (110) facet (80.05 μmol/mmol<sub>def</sub>) > (001) facet (31.85 μmol/mmol<sub>def</sub>) > (012) facet (13.14 μmol/mmol<sub>def</sub>). The underlying mechanism by which OVDs affect arsenate adsorption across different exposed facets of hematite was studied. The results reveal that the tremendous improvement of arsenate adsorption caused by OVDs on the (110) facet compared to (001) and (012) facets was attributed to their stronger bonding strength of As to under-coordinated Fe atoms, thus significantly promoting the immobilization of arsenate. The findings of this study enhance our ability to precisely understand the migration and fate of As while also aiding in the design of highly efficient iron mineral materials for mitigating As pollution.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"2802-2814"},"PeriodicalIF":10.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062299","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
Forty-Year Time Series of Anthropogenic Uranium in Fucus vesiculosus from Kattegat: Validating 236U Releases from European Nuclear Reprocessing Plants.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-31 DOI: 10.1021/acs.est.4c07622
Jixin Qiao, Yiyao Cao, Mu Lin, Yanchun He, Peter Steier, Karin Hain
{"title":"Forty-Year Time Series of Anthropogenic Uranium in <i>Fucus vesiculosus</i> from Kattegat: Validating <sup>236</sup>U Releases from European Nuclear Reprocessing Plants.","authors":"Jixin Qiao, Yiyao Cao, Mu Lin, Yanchun He, Peter Steier, Karin Hain","doi":"10.1021/acs.est.4c07622","DOIUrl":"10.1021/acs.est.4c07622","url":null,"abstract":"<p><p>An accurate input function of uranium-236 (<sup>236</sup>U) is essential for its numerous applications in environmental and ocean studies. This work reveals potential overestimation on <sup>236</sup>U releases from the Sellafield (SF) nuclear reprocessing plant (RP) by earlier estimations using shells. We report a 40-year time series dataset of uranium isotopes in seaweed seasonally collected in the Kattegat, downstream of radioactive discharges from the European RPs, namely La Hague (LH) and SF. Comparison between our measured <sup>236</sup>U concentrations in seaweed and model-simulated values derived from <sup>236</sup>U releases of LH and SF suggests that the previously reconstructed SF discharges may have nearly 1 order of magnitude overestimation. Such overestimation would introduce large uncertainties when <sup>236</sup>U is used as a point source in environmental tracer applications and ocean model validation. We foresee that this work will significantly improve the applications of radioisotope tracers in oceanic studies such as the spreading of marine pollutants, ocean mixing, and circulation, especially in the regions of the North Atlantic and Arctic Oceans.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"2675-2685"},"PeriodicalIF":10.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062242","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
Scant Evidence for Long-Range Atmospheric Transport of Particle-Bound Benzotriazole Ultraviolet Stabilizers.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-30 DOI: 10.1021/acs.est.4c11623
Chubashini Shunthirasingham, Faqiang Zhan, Milena Rabu, Jenny Oh, Yuening Li, Ying Duan Lei, Hayley Hung, Zhe Lu, Frank A P C Gobas, Maryam Moradi, Frank Wania
{"title":"Scant Evidence for Long-Range Atmospheric Transport of Particle-Bound Benzotriazole Ultraviolet Stabilizers.","authors":"Chubashini Shunthirasingham, Faqiang Zhan, Milena Rabu, Jenny Oh, Yuening Li, Ying Duan Lei, Hayley Hung, Zhe Lu, Frank A P C Gobas, Maryam Moradi, Frank Wania","doi":"10.1021/acs.est.4c11623","DOIUrl":"10.1021/acs.est.4c11623","url":null,"abstract":"<p><p>Despite benzotriazole UV stabilizers (BT-UVs) being widely used since the 1960s, few empirical data on their atmospheric presence exist. UV-328 was added to the Stockholm Convention on Persistent Organic Pollutants, based in part on model calculations indicating atmospheric long-range transport potential. We investigated the atmospheric occurrence of BT-UVs at multiple sites that differ greatly in their proximity to potential sources. UV-P, UV-328, UV-234, UV-326, UV-329, and UV-327 were quantified in active air samples collected in suburban Toronto, on Saturna Island in the Salish Sea, at Point Petre on Lake Ontario, and in Alert, Nunavut, as well as in XAD-resin based passive air samplers deployed at sites in British Columbia and Quebec. As the most volatile BT-UV, UV-P was present in the gas phase across all sampling locations, with higher concentrations in urban areas. The five less volatile BT-UVs were present only in active air samples from suburban Toronto and were not found above detection limits (0.03-1.7 pg·m<sup>-3</sup>) anywhere else. Empirical evidence thus does not support model predictions of long-range atmospheric transport of particle-bound BT-UVs. Predictions based on simple model calculations should be supported by empirical data if they are to be used as the basis for regulatory decisions.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"2641-2650"},"PeriodicalIF":10.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062309","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
Approaches for GC-HRMS Screening of Organic Microcontaminants: GC-APCI-IMS-QTOF versus GC-EI-QOrbitrap.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-31 DOI: 10.1021/acs.est.4c11032
David Izquierdo-Sandoval, Juan Vicente Sancho, Félix Hernández, Tania Portoles
{"title":"Approaches for GC-HRMS Screening of Organic Microcontaminants: GC-APCI-IMS-QTOF versus GC-EI-QOrbitrap.","authors":"David Izquierdo-Sandoval, Juan Vicente Sancho, Félix Hernández, Tania Portoles","doi":"10.1021/acs.est.4c11032","DOIUrl":"10.1021/acs.est.4c11032","url":null,"abstract":"<p><p>This study explores the capabilities of GC-APCI-IMS-QTOF MS and GC-EI-QOrbitrap MS in screening applications and different strategies for wide-scope screening of organic microcontaminants using target suspect and nontarget approaches. On one side, GC-APCI-IMS-QTOF MS excels at preserving molecular information and adds ion mobility separation, facilitating screening through the list of componentized features containing accurate mass, retention time, CCS, and fragmentation data. On the other side, the extensive and robust fragmentation of GC-EI-QOrbitrap MS allows the application of different strategies for target and nontarget approaches using the NIST library spectra. Our findings revealed that GC-EI-QOrbitrap MS is more sensitive in target approaches. Automated workflows for suspect screening in GC-APCI-IMS-QTOF MS minimize false annotations but face challenges with false negatives due to in-source fragmentation and limitations when using <i>in silico</i> fragmentation tools. Conversely, a nontarget approach in GC-EI-QOrbitrap MS can reliably identify unknowns but results in more false annotations in complex matrices. This work highlights the strengths and limitations of each system and guides for their optimal application for wide-scope screening in environmental and food safety applications.</p>","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":" ","pages":"2436-2448"},"PeriodicalIF":10.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062232","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
Forest Wildfire Increases the Seasonal Allocation of Soil Labile Carbon Fractions Due to the Transition from Microbial K- to r-Strategists
IF 9.028 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 DOI: 10.1021/acs.est.4c07470
Qianqian Qin, Yin Wang, Yanhong Liu
{"title":"Forest Wildfire Increases the Seasonal Allocation of Soil Labile Carbon Fractions Due to the Transition from Microbial K- to r-Strategists","authors":"Qianqian Qin, Yin Wang, Yanhong Liu","doi":"10.1021/acs.est.4c07470","DOIUrl":"https://doi.org/10.1021/acs.est.4c07470","url":null,"abstract":"Promoting the formation and accumulation of soil carbon (C) is one of the natural solutions to address climate change, but frequent wildfires increase its uncertainty and challenge. This two-year study deciphered the driving pathways of seasonal and vertical patterns in a soil C pool following a wildfire from a microbial perspective. Results showed that total organic C concentration and stock postfire decreased by 29.9 and 17.5% on average compared with the unburned control, respectively, whereas the allocations of labile C increased by 25.1–45.7%. Fire-induced alterations in labile C fractions were complicated due to their significant seasonality and respective sensitivities. Nonetheless, we emphasized that microbial life-history traits were the decisive mediators of variations and that significant positive linkages existed between labile C and microbial r-selected communities. Fire stimulated lower bacterial and fungal copiotroph/oligotroph ratios and higher ribosomal ribonucleic acid operon copy number, shifting microbes from K- to r-strategists. From integrated soil C pool management indices, fire can be concluded to reduce C stability and accelerate C cycling, but whether the recaptured prevalence of K-strategist over time will modify C processes remains unknown. This study provided a stepping stone for future efforts in accurate C predictions and reasonable C management.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"9 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143384982","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
MAPK-CncC Signaling Pathways Regulate the Antitoxic Response to Avermectin-Induced Oxidative Stress in Juvenile Chinese Mitten Crab, Eriocheir sinensis.
IF 10.8 1区 环境科学与生态学
环境科学与技术 Pub Date : 2025-02-11 Epub Date: 2025-01-30 DOI: 10.1021/acs.est.4c11404
Yi Huang, Yuhang Hong, Shu Wu, Yan Sun, Qiang Huang, Xiaodan Hu, Wei Long, Zhiqiu Huang
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