ACS ES&T waterPub Date : 2025-03-25DOI: 10.1021/acsestwater.4c0062510.1021/acsestwater.4c00625
V. V. S. S. Sarma*, Mathieu Sebilo, B. S. K. Kumar, B. Sridevi, V. Vaury, F. Guerin, L. Ruiz, J. Riotte and D. Cardinal,
{"title":"Regional Variations in Nitrous Oxide in the Indian Groundwater: Influence of Agricultural Practices, Irrigation, and Rainfall Patterns","authors":"V. V. S. S. Sarma*, Mathieu Sebilo, B. S. K. Kumar, B. Sridevi, V. Vaury, F. Guerin, L. Ruiz, J. Riotte and D. Cardinal, ","doi":"10.1021/acsestwater.4c0062510.1021/acsestwater.4c00625","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00625https://doi.org/10.1021/acsestwater.4c00625","url":null,"abstract":"<p >Intensified agricultural practices, particularly the increased use of nitrogen fertilizers, are fueling the rise of nitrous oxide (N<sub>2</sub>O) in groundwater. This gas is produced through the nitrification/denitrification of inorganic nitrogen in the groundwater. Based on combined chemical and isotopic analyses of nitrate (NO<sub>3</sub><sup>–</sup>) and chemical analysis of N<sub>2</sub>O, we present the first-ever evidence for widespread denitrification-driven N<sub>2</sub>O accumulation in Indian groundwater that often exceeds 25 times the saturation level. This phenomenon is particularly concerning in regions where low precipitation is received with intensive groundwater irrigation, leading to an inadvertent accumulation of N<sub>2</sub>O in the groundwater. The emission factor for groundwater (EF5g) from the agricultural soils of India is significantly lower (0.00067) than the global mean values (0.008), suggesting that indirect fluxes of N<sub>2</sub>O from the Indian soils are lower than the global mean. Implementing sustainable agricultural practices and maximum feasible control measures could further reduce indirect N<sub>2</sub>O emissions from agricultural soils and their associated environmental consequences.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1557–1568 1557–1568"},"PeriodicalIF":4.8,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-24DOI: 10.1021/acsestwater.4c0098110.1021/acsestwater.4c00981
Zhixiang Zhang, Qianxuan Zhang, Jieqiang Liu and Qingbo Li*,
{"title":"Multipoint Pollution Localization Method for Surface Water Based on Time-Frequency Analysis","authors":"Zhixiang Zhang, Qianxuan Zhang, Jieqiang Liu and Qingbo Li*, ","doi":"10.1021/acsestwater.4c0098110.1021/acsestwater.4c00981","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00981https://doi.org/10.1021/acsestwater.4c00981","url":null,"abstract":"<p >The localization of surface water pollution involves the inversion of source parameters such as positions, amounts, and duration based on monitoring data. This process is crucial for formulating remedial strategies and identifying responsible parties during sudden water pollution incidents. Existing models target single-source localization but fail in multisource scenarios with continuous, mixed discharges, as concentration superposition at monitoring points distorts dispersion models, causing nonunique solutions, significant deviations, and degraded accuracy. This study proposes a time-frequency analysis method to address multipoint surface water pollution source localization under complex scenarios involving instantaneous and continuous discharges, transforming the hydrodynamic inverse problem into a time-domain simulation and frequency-domain optimization framework. It constructs a discrete convolution dynamic equation to uniformly model forward diffusion process. Coupled with the Fourier frequency-domain mapping and the position regularization loss function, the method employs the African Vultures Optimization Algorithm (AVOA) for parallel optimization, achieving high-precision inversion of source parameters for pollution localization. Experimental results demonstrate relative errors below 10% for all parameters in single- and multisource scenarios, and validation on the U.S. Truckee river tracer data set achieved a coefficient of determination (<i>R</i><sup>2</sup>) exceeding 0.95, confirming the method’s reliability for practical applications.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1640–1651 1640–1651"},"PeriodicalIF":4.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-24DOI: 10.1021/acsestwater.4c0082610.1021/acsestwater.4c00826
Qixin Hu, Chao He, Lei Zhang, Yuming Su, Xin Zou and Lu Zhang*,
{"title":"Potential Impacts of Wildfires on Regional Water Quality: A Case Study of the “8·19” Forest Wildfire in Jiangjin, Chongqing","authors":"Qixin Hu, Chao He, Lei Zhang, Yuming Su, Xin Zou and Lu Zhang*, ","doi":"10.1021/acsestwater.4c0082610.1021/acsestwater.4c00826","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00826https://doi.org/10.1021/acsestwater.4c00826","url":null,"abstract":"<p >This study examines the impacts of forest wildfires on water quality using the Chongqing August 19, 2022 forest wildfire as a representative case. By integrating water quality, meteorological, and atmospheric pollutant (black carbon and organic matter) data sets, we employ spatial statistical analysis, HYSPLIT airflow trajectory modeling, and the Potential Source Contribution Function (PSCF) model to investigate regional water quality variations before and after the wildfire event. The results reveal significant water quality degradation during August-September 2022, manifested by Total nitrogen concentrations surging to 3.33 mg/L in some areas, turbidity peaking at 111.7 NTU, and a marked reduction in surface water supplies classified as class III or higher. PSCF analysis shows consistent patterns between the north–northwest pollutant transport direction, elevated BC/OM levels, and water quality impairment zones. Our findings highlight both direct deposition effects from wildfire pollutant and indirect atmospheric pollution pathways. This research underscores the urgent need for integrated watershed management strategies that account for both direct and secondary wildfire impacts in the context of ongoing climate change.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1569–1581 1569–1581"},"PeriodicalIF":4.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-24DOI: 10.1021/acsestwater.4c0118610.1021/acsestwater.4c01186
Ben Mills, Michalis N. Zervas and James A. Grant-Jacob*,
{"title":"Diatom Lensless Imaging Using Laser Scattering and Deep Learning","authors":"Ben Mills, Michalis N. Zervas and James A. Grant-Jacob*, ","doi":"10.1021/acsestwater.4c0118610.1021/acsestwater.4c01186","DOIUrl":"https://doi.org/10.1021/acsestwater.4c01186https://doi.org/10.1021/acsestwater.4c01186","url":null,"abstract":"<p >We present a novel approach for imaging diatoms using lensless imaging and deep learning. We used a laser beam to scatter off samples of diatomaceous earth (diatoms) and then recorded and transformed the scattered light into microscopy images of the diatoms. The predicted microscopy images gave an average SSIM of 0.98 and an average RMSE of 3.26 as compared to the experimental data. We also demonstrate the capability of determining the velocity and angle of movement of the diatoms from their scattering patterns as they were translated through the laser beam. This work shows the potential for imaging and identifying the movement of diatoms and other microsized organisms in situ within the marine environment. Implementing such a method for real-time image acquisition and analysis could enhance environmental management, including improving the early detection of harmful algal blooms.</p><p >Monitoring diatoms is important in understanding the health of the marine environment. This study documents the use of lensless sensing to image samples of diatoms and quantify their movement.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1814–1820 1814–1820"},"PeriodicalIF":4.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestwater.4c01186","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-24DOI: 10.1021/acsestwater.4c0127410.1021/acsestwater.4c01274
Yuhong Li, Mingshi Wang, Dong Zhang, Kebing Chen, Ke Pan, Chen Ye, Siyue Li, Wei Ma, Wenshi Zhang, Hao Jiang* and Quanfa Zhang,
{"title":"Divergent Effects of Agriculture on River Methane and Carbon Dioxide Concentrations and Emissions: Insights from Multiple Techniques","authors":"Yuhong Li, Mingshi Wang, Dong Zhang, Kebing Chen, Ke Pan, Chen Ye, Siyue Li, Wei Ma, Wenshi Zhang, Hao Jiang* and Quanfa Zhang, ","doi":"10.1021/acsestwater.4c0127410.1021/acsestwater.4c01274","DOIUrl":"https://doi.org/10.1021/acsestwater.4c01274https://doi.org/10.1021/acsestwater.4c01274","url":null,"abstract":"<p >This study examined the impacts of agriculture on methane (CH<sub>4</sub>) and carbon dioxide (CO<sub>2</sub>) dynamics in an agricultural river in eastern China. The dissolved CH<sub>4</sub> concentrations (dCH<sub>4</sub>; 422 ± 188 nmol L<sup>–1</sup> in summer and 193 ± 190 nmol L<sup>–1</sup> in winter) and CH<sub>4</sub> emissions (6430 ± 11,650 μmol m<sup>–2</sup> d<sup>–1</sup> in summer and 396 ± 1190 μmol m<sup>–2</sup> d<sup>–1</sup> in winter) were closely associated with agriculture-enhanced allochthonous CH<sub>4</sub> inputs and methanogenesis by methanogens and algae. The shallow water depth and low flow velocity of the plain river were favorable for bubble release. The pressure of CO<sub>2</sub> (<i>p</i>CO<sub>2</sub>) values were substantially higher than the atmospheric level, and the CO<sub>2</sub> emission rates were 96 ± 159 mmol m<sup>–2</sup> d<sup>–1</sup> in summer and 27 ± 64 mmol m<sup>–2</sup> d<sup>–1</sup> in winter. The <i>p</i>CO<sub>2</sub> and CO<sub>2</sub> emissions were largely regulated by the pH, which was not particularly relevant to agricultural activities. Notably, methanotrophs contributed significantly to the <i>p</i>CO<sub>2</sub> in the winter. Therefore, agriculture could generate more impacts on fluvial CH<sub>4</sub> than on CO<sub>2</sub>, which is crucial for understanding the anthropogenic impacts on fluvial carbon emissions and the simulation of carbon budgets in global biogeochemical models.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1930–1940 1930–1940"},"PeriodicalIF":4.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-23DOI: 10.1021/acsestwater.4c0108610.1021/acsestwater.4c01086
Wen-Long Wang, Peng-Hui Liu, Jung-Hyun Son, Hang Su, Min-Yong Lee, Hong-Ying Hu, Qian-Yuan Wu* and Uwe Hübner,
{"title":"The pH Dependence of O3/Mn(II) Synergy for the Reactive Species Evolution and Micropollutant Degradation","authors":"Wen-Long Wang, Peng-Hui Liu, Jung-Hyun Son, Hang Su, Min-Yong Lee, Hong-Ying Hu, Qian-Yuan Wu* and Uwe Hübner, ","doi":"10.1021/acsestwater.4c0108610.1021/acsestwater.4c01086","DOIUrl":"https://doi.org/10.1021/acsestwater.4c01086https://doi.org/10.1021/acsestwater.4c01086","url":null,"abstract":"<p >The combination of ozonation and Mn(II) (O<sub>3</sub>/Mn(II)) is expected to synergistically eliminate recalcitrant organic micropollutants in water. However, the decay of O<sub>3</sub>, formation of •OH and reactive manganese species (RMnSs), and synergism in micropollutant degradation have not been comprehensively understood. Herein, the synergism of O<sub>3</sub> and Mn(II) was observed to be pH-dependent. Compared to ozonation alone, O<sub>3</sub>/Mn(II) preferentially formed Mn(V and VI) and slightly increased •OH yield (from 0.22 to 0.30) at acidic pH 4–5, while it preferentially formed Mn(VII) and significantly increased OH yield (from 0.52 to 0.74) at circumneutral pH 6–7. Thereafter, O<sub>3</sub>/Mn(II) prominently increased RMnS exposure at acidic pH, while it dramatically diminished O<sub>3</sub>-exposurse to increase •OH exposure at circumneutral pH. As a result, O<sub>3</sub>/Mn(II) outperformed ozonation alone for the degradation of various O<sub>3</sub>-resistant micropollutants (3.7–7.9 times faster). For example, the RMnSs (82.7% contribution) and •OH (84.2% contribution) were the dominant contributors to the degradation of the isothiazolinone biocide (5-chloro-2-methyl-4-isothiazolin-3-one) at acidic and circumneutral pH, respectively. Mn(II) can enhance the removal of O<sub>3</sub>-resistant micropollutants in relatively clean waters (e.g., tap water), but its effectiveness was limited in more contaminated waters (e.g., WWTP effluent). These findings support the practice and pH optimization of the O<sub>3</sub>/Mn(II) in various water types.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1706–1715 1706–1715"},"PeriodicalIF":4.8,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-20DOI: 10.1021/acsestwater.4c0113210.1021/acsestwater.4c01132
Muhammad Arslan, Akeem Bello, Ahmed Y. A. Mohamed, Muhammad Usman, Zhiren Wu and Mohamed Gamal El-Din*,
{"title":"Polyacrylamide-Modified Basalt Fibers for Passive Reclamation of Oil Sands Process Water","authors":"Muhammad Arslan, Akeem Bello, Ahmed Y. A. Mohamed, Muhammad Usman, Zhiren Wu and Mohamed Gamal El-Din*, ","doi":"10.1021/acsestwater.4c0113210.1021/acsestwater.4c01132","DOIUrl":"https://doi.org/10.1021/acsestwater.4c01132https://doi.org/10.1021/acsestwater.4c01132","url":null,"abstract":"<p >This study investigates the potential of cationic polyacrylamide (CPAM)-modified basalt fibers (BF) as biocarriers for biofilm-based organic transformation in oil sands process-affected water (OSPW) in a lab-scale investigation. The fibers underwent Soxhlet extraction and epoxy treatment for CPAM coating, enhancing their hydrophilicity and surface charge, which improved microbial attachment and facilitated biodegradation of naphthenic acids (NAs), reducing their concentrations from 70.4 to 25.5 mg/L over 108 weeks. Results illustrated rapid removal of organics in the initial phase, likely due to NAs sorption onto the BF surface, followed by slower removal in subsequent stages supported by biodegradation. The desorption study confirmed that biodegradation was the dominant mechanism. Fourier-Transform Infrared Spectroscopy and synchronous fluorescence spectroscopy indicated chemical transformations on BF along with a significant decrease in fluorescent organic compounds. Molecular weight analysis confirmed the transformation of complex organics into smaller molecules. Microtox showed a significant reduction in toxicity from over 50% to approximately 15–20%. eDNA sequencing revealed aerobic bacteria in outer zones and anaerobic microbes in the middle and core, while <i>Cercomonas</i> sp. was a dominant eukaryotic player facilitating organics attenuation. These findings suggest the use of BF in treatment wetlands or end pit lakes for OSPW treatment, offering a sustainable solution.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1755–1767 1755–1767"},"PeriodicalIF":4.8,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-20DOI: 10.1021/acsestwater.4c0101210.1021/acsestwater.4c01012
Linlu Shen, Xiaobin Liao, Yingxu Gong, Pengwei Yan, Zhonglin Chen* and Shane A. Snyder*,
{"title":"How to Control N-Nitrosodimethylamine (NDMA) in Water Treatment: From Origins to Removal","authors":"Linlu Shen, Xiaobin Liao, Yingxu Gong, Pengwei Yan, Zhonglin Chen* and Shane A. Snyder*, ","doi":"10.1021/acsestwater.4c0101210.1021/acsestwater.4c01012","DOIUrl":"https://doi.org/10.1021/acsestwater.4c01012https://doi.org/10.1021/acsestwater.4c01012","url":null,"abstract":"<p >N-nitrosodimethylamine (NDMA) in water has garnered significant global attention, driving extensive and ongoing research efforts. However, earlier reviews on the subject have generally lacked the inclusion of the latest publications, and some of the findings reported across different studies remain inconsistent. The present review updates recent advancements in NDMA in water, addressing topics ranging from the origins of NDMA precursors and its formation mechanisms to removal technologies, while also providing an objective assessment of conflicting results in the literature. Insights and strategies for improving NDMA control are discussed, including source reduction, process optimization, and end-of-pipe removal. For practical applications, strategies for NDMA control could be selected based on the cost-effectiveness analysis. It is recommended to use a multiple-barrier system when funds are sufficient. Besides, this review provides a forward-thinking perspective for future NDMA research, suggesting establishing a global NDMA database, based on a combination of experimental tests (e.g., bench tests) and in silico approaches (e.g., quantum chemical computation and machine learning).</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1514–1529 1514–1529"},"PeriodicalIF":4.8,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-19DOI: 10.1021/acsestwater.4c0126410.1021/acsestwater.4c01264
Yang Zhao, Liang Duan*, How Yong Ng and Slawomir W. Hermanowicz,
{"title":"The New Water Treatment Technology Based on the “Water–Energy–Carbon Nexus” Achieving Carbon Neutrality in Wastewater Treatment Plants","authors":"Yang Zhao, Liang Duan*, How Yong Ng and Slawomir W. Hermanowicz, ","doi":"10.1021/acsestwater.4c0126410.1021/acsestwater.4c01264","DOIUrl":"https://doi.org/10.1021/acsestwater.4c01264https://doi.org/10.1021/acsestwater.4c01264","url":null,"abstract":"","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1511–1513 1511–1513"},"PeriodicalIF":4.8,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS ES&T waterPub Date : 2025-03-19DOI: 10.1021/acsestwater.4c0096710.1021/acsestwater.4c00967
Margaret A. G. Hinkle*, Carla E. Rosenfeld, Sarah G. Teagle, Jeffrey E. Post and Cara M. Santelli,
{"title":"Progressive Nickel Incorporation into Fungal and Abiotic Manganese Oxides with Aging","authors":"Margaret A. G. Hinkle*, Carla E. Rosenfeld, Sarah G. Teagle, Jeffrey E. Post and Cara M. Santelli, ","doi":"10.1021/acsestwater.4c0096710.1021/acsestwater.4c00967","DOIUrl":"https://doi.org/10.1021/acsestwater.4c00967https://doi.org/10.1021/acsestwater.4c00967","url":null,"abstract":"<p >Manganese oxides influence Ni partitioning in natural and metal-polluted systems through adsorption and incorporation. Understanding Ni behavior within environmental contexts requires knowledge of its binding to environmentally relevant minerals such as birnessite during and after precipitation. Here, we compare Ni binding at initial (48-h) and aged (14-day) time frames onto fungal (via <i>Stagonospora</i> sp. SRC1lsM3a) and abiotic birnessite, as fungi are important Mn oxidizers in contaminated sites, with two timing-of-addition scenarios: reacting preformed birnessite and coprecipitation. X-ray absorption spectra were collected to track the mineral structures and Ni binding modes. Aging abiotic and fungal birnessites reacted with Ni increase the hexagonal sheet symmetry and average Mn oxidation state (AMOS), while coprecipitation yields similar initial (and stable) structures. Aging also shifts Ni from biomass- and edge-bound sites in fungal and abiotic systems, respectively, to binding the above vacancies and incorporating into the mineral structure. Incorporated Ni is positively correlated with AMOS and Mn(IV) content, with both fungal- and abiotic-aged samples achieving 2.3 mol % (mol Ni:mol Mn) incorporation, albeit with different timing-of-addition scenarios. These results suggest an equilibrium structure for Ni-substituted phyllomanganates, with birnessite and fungal biomass acting as Ni sinks and sources in environmental systems.</p><p >Our research highlights how nickel interacts with manganese oxide minerals, revealing progressive nickel incorporation into manganese oxide minerals over time, with distinct Ni binding behaviors between fungal versus abiotic manganese oxides.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"5 4","pages":"1628–1639 1628–1639"},"PeriodicalIF":4.8,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestwater.4c00967","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}