IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-03 DOI: 10.1021/acs.est.4c10646

Yongkang Cui, Yi Xing, Yang Zheng, Rongrong Lei, Wei Su, Xiaolin Yu

{"title":"Understanding the Key Role of Cations in Water Tolerance during the CO2/CO Separation Process under Low-Humidity Conditions","authors":"Yongkang Cui, Yi Xing, Yang Zheng, Rongrong Lei, Wei Su, Xiaolin Yu","doi":"10.1021/acs.est.4c10646","DOIUrl":"https://doi.org/10.1021/acs.est.4c10646","url":null,"abstract":"The efficient separation of CO2 and CO under low-humidity conditions is crucial for ensuring the long-term operational stability of industrial applications. While the number of adsorbent cations plays a key role in separation, their influence on purification under low humidity remains insufficiently understood. The breakthrough results indicate that, even under extremely low humidity, the adsorption capacity of CO2 and CO can decrease by up to 6 and 24%, respectively. It is found that the presence of water could increases the CO2/CO separation factor from 6.91 to 9. This enhancement occurs because CO, with its lower quadrupole moment, experiences a more significant reduction in adsorption capacity than CO2. The quantity and accessibility of cations significantly influence the water tolerance in adsorption processrs. As the number of cations decreases, CO adsorption stabilizes due to the associated hydrophobicity. However, for CO2, the high accessibility of cations at the S3 site in NaX(88) facilitates its conversion to stable carbonates and bicarbonates in the presence of water, enabling exceptional water resistance. These findings offer valuable insights into designing high-performance adsorbents for efficient CO2 capture and separation from industrial flue gas under low-humidity conditions.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"7 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538842","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

Current Used Pesticides in Air and Soil in Eastern China: Occurrence, Spatial-Seasonal Distribution, and Air–Soil Exchange

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-02 DOI: 10.1021/acs.est.5c01119

Liang Wang, Pu-Fei Yang, Wan-Li Ma, Meng-Qi Fu, Fu-Jie Zhu, Wen-Long Li

{"title":"Current Used Pesticides in Air and Soil in Eastern China: Occurrence, Spatial-Seasonal Distribution, and Air–Soil Exchange","authors":"Liang Wang, Pu-Fei Yang, Wan-Li Ma, Meng-Qi Fu, Fu-Jie Zhu, Wen-Long Li","doi":"10.1021/acs.est.5c01119","DOIUrl":"https://doi.org/10.1021/acs.est.5c01119","url":null,"abstract":"Current used pesticides (CUPs) are extensively used as alternatives for traditional pesticides in the world. In order to investigate the pollution characteristics of CUPs in a large-scale multimedium environment, a comprehensive and comparative study was conducted on occurrence, spatial-seasonal distribution, and air–soil exchange of CUPs across 30° latitude in Eastern China. A total of 72 target CUPs were detected, and 43 CUPs had a detection frequency over 30% in both air and soil samples. Herbicides, fungicides, and organophosphorus insecticides predominantly exhibited volatilization from soil to air, while pyrethroids exhibited deposition from air to soil. In the high-latitude Northeastern China, the air–soil exchange net flux of CUPs was the lowest due to the lower temperature, especially in winter. Along with decreasing latitude and increasing temperature, the air–soil exchange flux increased, which was significantly influenced by cultivation practices and the usage frequency of CUPs. Therefore, the grasshopper effect driven by temperature difference caused further migration and deposition of CUPs toward higher latitude regions. Moreover, the emission fluxes of CUPs to soil exhibited significant variations closely linked to local climatic conditions and types of crops. In summary, this study obtained valuable baseline information for the pollution characteristics and air–soil exchange of CUPs on a large scale, which also provided a better understanding of the environmental fate of CUPs from the migration perspective.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"52 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532718","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

Importance of Attachment Efficiency in Determining the Fate of PS and PVC Nanoplastic Heteroaggregation with Natural Colloids Using a Multimedia Model

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-02 DOI: 10.1021/acs.est.4c10918

Fazel Abdolahpur Monikh, Joris T. K. Quik, Mark R. Wiesner, Andrea Tapparo, Paolo Pastore, Hans-Peter Grossart, Jarkko Akkanen, Raine Kortet, Jussi V.K. Kukkonen

{"title":"Importance of Attachment Efficiency in Determining the Fate of PS and PVC Nanoplastic Heteroaggregation with Natural Colloids Using a Multimedia Model","authors":"Fazel Abdolahpur Monikh, Joris T. K. Quik, Mark R. Wiesner, Andrea Tapparo, Paolo Pastore, Hans-Peter Grossart, Jarkko Akkanen, Raine Kortet, Jussi V.K. Kukkonen","doi":"10.1021/acs.est.4c10918","DOIUrl":"https://doi.org/10.1021/acs.est.4c10918","url":null,"abstract":"Here, we assessed the heteroaggregation of polystyrene (PS) and poly(vinyl chloride) (PVC) nanoplastics with SiO2 as a model of natural colloids. Homoaggregation and heteroaggregation were evaluated as a function of CaCl2 (0–100 mM) and natural organic matter (NOM) (50 mg L–1) at a designated concentration of nanoplastics (200 μg L–1). Critical coagulation concentrations (CCC) of nanoplastics were determined in homoaggregation and heteroaggregation experiments with SiO2 and CaCl2. The attachment efficiency (α) was calculated by quantifying the number of nanoplastics in the presence of CaCl2, NOM, and SiO2 using single-particle inductively coupled plasma mass spectrometry (spICP-MS) and pseudo-first-order kinetics. The calculated α was fed into the SimpleBox4Plastics model to predict the fate of nanoplastics across air, water, soil, and sediment compartments. Nanoplastics exhibited high stability against homoaggregation, while significant heteroaggregation with SiO2 occurred at CaCl2 concentrations above 100 mM. The influence of NOM was also evaluated, showing a reduction in heteroaggregation with SiO2 for both nanoplastic types. Sensitivity analysis indicated that the degradation half-life of the tested nanoplastics had a more significant impact on persistence than did α. The results emphasize the environmental stability of nanoplastics, particularly in freshwater and soil compartments, and the critical role of NOM and emission pathways in determining their fate.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"8 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532717","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

From High Resolution Tandem Mass Spectrometry to Pollutant Toxicity AI-Based Prediction: A Case Study of 7 Endocrine Disruptors Endpoints

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-02 DOI: 10.1021/acs.est.4c11417

Xin Zhang, Xiaoxiao Han, Tongtong Xiang, Yanna Liu, Wenxiao Pan, Qiao Xue, Xian Liu, Jianjie Fu, Aiqian Zhang, Guangbo Qu, Guibin Jiang

{"title":"From High Resolution Tandem Mass Spectrometry to Pollutant Toxicity AI-Based Prediction: A Case Study of 7 Endocrine Disruptors Endpoints","authors":"Xin Zhang, Xiaoxiao Han, Tongtong Xiang, Yanna Liu, Wenxiao Pan, Qiao Xue, Xian Liu, Jianjie Fu, Aiqian Zhang, Guangbo Qu, Guibin Jiang","doi":"10.1021/acs.est.4c11417","DOIUrl":"https://doi.org/10.1021/acs.est.4c11417","url":null,"abstract":"Based on high-resolution mass spectrometry (HRMS), nontarget analysis (NTA) can rapidly identify and characterize numerous hazardous substances in complex environmental samples. However, the intricate identification process often results in the underutilization of many mass spectrometry features. Even when chemical structures are identified, their toxicological effects and health outcomes may remain unknown. To address these challenges, this study introduces MSFragTox, a novel approach that leverages the rich fragmentation spectra inherent in high resolution tandem mass spectrometry (MS/MS) to directly predict toxicity. This method integrates MS/MS data with high-throughput screening (HTS) assays, focusing on seven endocrine disruption-related endpoints from Tox21, and uses MS-derived fingerprints: substructure fragmentation probability vectors to construct toxicity predictions using machine learning algorithms. The best model demonstrated robust performance with an average area under the receiver operating characteristic curve (AUROC) of 0.845 on the test set, outperforming models based on traditional molecular fingerprints and descriptors. Additionally, a web client (http://ms.envwind.site:8500) is provided for users to screen toxicity based on chemical MS/MS data. Furthermore, in-depth analyses of commonalities and differences in substructures reveal the mechanisms underlying across toxicity endpoints. Using MSFragTox, we validated the potential endocrine-disrupting effects of substances corresponding to MS/MS from real samples, highlighting the feasibility of directly studying toxicity through MS/MS and its potential applications in risk prediction and early warning for environmental samples.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"56 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532784","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 Characterization of Free Solutal Convection in Porous Rocks for CO2 Storage Applications

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-02 DOI: 10.1021/acs.est.4c10183

Anna-Maria Eckel, Andrea Rovelli, Ronny Pini

{"title":"Direct Characterization of Free Solutal Convection in Porous Rocks for CO2 Storage Applications","authors":"Anna-Maria Eckel, Andrea Rovelli, Ronny Pini","doi":"10.1021/acs.est.4c10183","DOIUrl":"https://doi.org/10.1021/acs.est.4c10183","url":null,"abstract":"Free solutal convection refers to the mixing process induced and sustained by local density differences arising from solute dissolution. This process underpins the long-term storage of carbon dioxide (CO2) following its injection and dissolution in the formation brine of subsurface rock formations, such as saline aquifers. Direct experimental evidence of free solutal convection in porous rocks is to-date still lacking, leaving large uncertainties on the realized rate of CO2 dissolution and its contribution toward storage. Using an analogue solute–solvent pair and 4D X-ray computed tomography, we report direct observations of this mixing process in rock core samples, including sandstones and carbonates. The imagery is used to characterize the mixing structures that arise upon solute dissolution and to quantify differences between the rock types. Thus, we compute the temporal evolution of spatial moments of the concentration distribution to derive practical properties, such as the effective transport velocity of the solute plumes. Unlike previous studies on random bead packs, we observe that these measures do not scale well with core-scale rock properties (permeability, porosity, Rayleigh number) and are influenced by microscale rock characteristics (subcore and pore-scale heterogeneities). The latter may need consideration when evaluating the CO2 storage potential of candidate formations.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"33 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532870","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

Spatial Variations of Atmospheric Alkylated Polycyclic Aromatic Hydrocarbons across the Western Pacific to the Southern Ocean: Unexpected Increasing Deposition

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-02 DOI: 10.1021/acs.est.4c12147

Fu-Jie Zhu, Xi-Mei Lu, Jing-Wen Jia, Xue Zhang, De-Feng Xing, Ming-Hong Cai, Roland Kallenborn, Yi-Fan Li, Derek C. G. Muir, Zi-Feng Zhang, Xianming Zhang

{"title":"Spatial Variations of Atmospheric Alkylated Polycyclic Aromatic Hydrocarbons across the Western Pacific to the Southern Ocean: Unexpected Increasing Deposition","authors":"Fu-Jie Zhu, Xi-Mei Lu, Jing-Wen Jia, Xue Zhang, De-Feng Xing, Ming-Hong Cai, Roland Kallenborn, Yi-Fan Li, Derek C. G. Muir, Zi-Feng Zhang, Xianming Zhang","doi":"10.1021/acs.est.4c12147","DOIUrl":"https://doi.org/10.1021/acs.est.4c12147","url":null,"abstract":"Spatial variations of atmospheric alkylated polycyclic aromatic hydrocarbons (Alk-PAHs) are key to understanding their long-range atmospheric transport (LRAT). However, limited Alk-PAHs data have hindered their LRAT characterizations on a global scale. In this study, 49 Alk-PAHs were measured in the atmospheric samples collected across the Western Pacific to the Southern Ocean. The summed concentration of 39 frequently detected Alk-PAHs (Σ39Alk-PAHs) was 25.8 ± 25.3 ng m–3. The concentrations of Σ39Alk-PAHs significantly declined with the decrease in latitude (°N). Higher concentrations (55.8 ± 33.8 ng m–3) were linked to continental air mass compared to oceanic/Antarctica air mass (17.0 ± 13.6 ng m–3), highlighting continental emissions as the primary source of marine atmospheric Alk-PAHs. An unexpected increase in the G/P partitioning ratio (KP) was found in samples farther away from the continent, which cannot be explained by the influence of temperature on the partitioning process. Deposition analysis suggested that gaseous concentrations and the G/P partitioning largely influenced deposition patterns. Hypothetical scenario analysis indicated that increased KP under snowy conditions could enhance the total Alk-PAH deposition. These findings emphasize the need for accurate characterization of partitioning and deposition processes when studying the global fate of Alk-PAHs, particularly in remote and polar regions.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"66 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532821","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

Why Was My Manuscript Rejected without Review? Focus on Public Health and Environmental Exposures, Ecotoxicology, and Micro/Nanoplastics 为什么我的稿件未经审查就被退稿？关注公共健康与环境暴露、生态毒理学和微/纳米塑料

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-01 DOI: 10.1021/acs.est.5c02615

Daniel Schlenk, Pablo Gago-Ferrero, Frederic D. L. Leusch, Huahong Shi, Bin Wang, Xiaowei Zhang, Margaret Mills

引用次数: 0

Aged Biodegradable Nanoplastics Enhance Body Accumulation Associated with Worse Neuronal Damage in Caenorhabditis elegans

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-03-01 DOI: 10.1021/acs.est.4c13250

Tianshu Wu, Jing He, Zongjian Ye, Jieyi Xia, Min Chen, Siyuan Chen, Kehan Liu, Pengcheng Xing, Jiafu Yang, Yijing Qian, Dayong Wang

{"title":"Aged Biodegradable Nanoplastics Enhance Body Accumulation Associated with Worse Neuronal Damage in Caenorhabditis elegans","authors":"Tianshu Wu, Jing He, Zongjian Ye, Jieyi Xia, Min Chen, Siyuan Chen, Kehan Liu, Pengcheng Xing, Jiafu Yang, Yijing Qian, Dayong Wang","doi":"10.1021/acs.est.4c13250","DOIUrl":"https://doi.org/10.1021/acs.est.4c13250","url":null,"abstract":"The environmental and health challenges posed by petroleum-based biodegradable plastics, such as polybutylene succinate (PBS) and polybutyleneadipate-co-terephthalate (PBAT), are a significant concern because they are increasingly present in the environment and contribute a substantial proportion of microplastics (MPs) or nanoplastics (NPs). In this study, ultraviolet (UV)-aged PBS-NPs and PBAT-NPs are found to have a higher propensity to accumulate within the body of Caenorhabditis elegans (C. elegans) by prolonging the defecation interval, which could induce severe neuronal damage compared to pristine NPs. The increased accumulation of biodegradable nanoplastics (BNPs) and subsequent impairments of neurobehavior are highly attributed to their reduced particle size and altered surface properties, including changed chemical bonds and functional groups after photoaging. Aged BNPs also cause more severe damage to GABAergic neurons and neurotransmitter receptors, resulting in disrupted neuronal homeostasis and behaviors. Overall, BNPs of both PBS and PBAT components show no significant differences in biological accumulation and mechanisms of neural damage, highlighting the commonalities and characteristics of the adverse effects of petroleum-based BNPs on the nervous system. Our study opens up the exploration of the health impacts of photoaging and the degradation state of BNPs that are increasingly present in the environment.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"34 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526441","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

Ozone Reactions with Olefins and Alkynes: Kinetics, Activation Energies, and Mechanisms

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-02-28 DOI: 10.1021/acs.est.4c07119

Yan Wang, Eva M. Rodríguez, Daniel Rentsch, Zhimin Qiang, Urs von Gunten

{"title":"Ozone Reactions with Olefins and Alkynes: Kinetics, Activation Energies, and Mechanisms","authors":"Yan Wang, Eva M. Rodríguez, Daniel Rentsch, Zhimin Qiang, Urs von Gunten","doi":"10.1021/acs.est.4c07119","DOIUrl":"https://doi.org/10.1021/acs.est.4c07119","url":null,"abstract":"The temperature dependence of the kinetics and the mechanisms of ozone reactions with 19 olefins and 3 alkynes were investigated. The second-order rate constants (kO3) for ozone reactions with olefins were mostly in the range of 103–106 M–1 s–1, with activation energies of 17.4–37.7 kJ mol–1. In comparison, alkynes had lower kO3 (∼102 M–1 s–1) and higher activation energies (36.7–48.1 kJ mol–1). Reactivities of both olefins and alkynes are mainly influenced by inductive effects of substituents, with steric effects observed for cyclic olefins. 2-Buten-1,4-dial (BDA), synthesized with a novel method, is a toxic olefinic oxidation product from phenols. Its cis- and trans-isomers show distinct reactivities with ozone, with kO3 (20 °C) of 3.0 × 103 and 1.2 × 104 M–1 s–1, respectively. Two mols of glyoxal were formed per mol of ozonated BDA, with a slow release of the second mol from an α-hydroxyalkylhydroperoxide intermediate. 2-Ethynylbenzaldehyde reacts with ozone with a stoichiometry of 1:1 and kO3 (20 °C) = 1.6 × 102 M–1 s–1. Ozone attacks the ethynyl group, yielding a carboxyl product (2-carboxybenzaldehyde, 54%), an aldehyde product (phthaldialdehyde), and a dicarbonyl product with a stoichiometric release of H2O2 (21%). This study provides kinetic and mechanistic information for assessing the abatement of olefin- and alkyne-containing micropollutants by ozonation at various temperatures.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"24 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518066","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

Duration of O2 Exposure Determines Dominance of FeII vs CH4 Production in Tropical Forest Soils

IF 9.028 1区环境科学与生态学

环境科学与技术 Pub Date : 2025-02-28 DOI: 10.1021/acs.est.4c12329

Diego Barcellos, Sherlynette Pérez Castro, Ashley Campbell, Jeffrey A Kimbrel, Steven Joseph Blazewicz, Jessica Wollard, Jennifer Pett-Ridge, Aaron Thompson

{"title":"Duration of O2 Exposure Determines Dominance of FeII vs CH4 Production in Tropical Forest Soils","authors":"Diego Barcellos, Sherlynette Pérez Castro, Ashley Campbell, Jeffrey A Kimbrel, Steven Joseph Blazewicz, Jessica Wollard, Jennifer Pett-Ridge, Aaron Thompson","doi":"10.1021/acs.est.4c12329","DOIUrl":"https://doi.org/10.1021/acs.est.4c12329","url":null,"abstract":"Temporal fluctuations in redox conditions influence the availability of FeIII and greenhouse gas emissions in humid upland soils. However, the impact of fluctuation duration on biogeochemical processes remains unclear. We hypothesized that rates of FeIII reduction and CH4 production are sensitive to the duration of soil oxygenation. To test this, surface soil from the Luquillo Forest, Puerto Rico, was subjected to fluctuating redox conditions with an anoxic interval of 6 days followed by oxic intervals of either 8, 24, or 72 h. Shorter oxic intervals enhanced Fe reduction, while longer oxic intervals enhanced CH4 emissions. As O2 exposure decreased from 72 to 8 h, Fe reduction rates increased from 0.12 ± 0.02 to 0.26 ± 0.05 mmol kg–1 h–1, whereas cumulative CH4 decreased from 44.0 ± 4.7 to 12.7 ± 4.6 μmol kg–1. 13C-amino acid spikes were preferentially incorporated into the DNA of iron reducers (Anaeromyxobacter sp.) in the shorter oxic treatment (8 h vs 24 h), suggesting that Fe reducers are less inhibited by shorter periods of oxidation. Conversely, longer oxygen pulses appear to suppress Fe reducers more than methanogens, leading to increased CH4 emissions. These findings highlight the role of the redox oscillation length in modulating biogeochemical processes and greenhouse gas emissions in soils.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":"3 1","pages":""},"PeriodicalIF":9.028,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518116","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

环境科学与技术最新文献