Nature waterPub Date : 2026-07-28DOI: 10.1038/s44221-026-00682-1
Robert G. M. Spencer, Christina K. Remucal, Thomas Borch, Martin R. Kurek
{"title":"The use of ultrahigh- and high-resolution mass spectrometry to examine the anthropogenic signature of dissolved organic matter in aquatic systems","authors":"Robert G. M. Spencer, Christina K. Remucal, Thomas Borch, Martin R. Kurek","doi":"10.1038/s44221-026-00682-1","DOIUrl":"10.1038/s44221-026-00682-1","url":null,"abstract":"In recent decades the rise of ultrahigh- and high-resolution mass spectrometry ((U)HRMS) has enhanced our ability to resolve the molecular complexity of dissolved organic matter (DOM) and open the black box linking DOM to the rapidly changing world, including impacts on aquatic systems. In this Review we highlight how direct anthropogenic signatures, and indirect anthropogenic-driven or -impacted processes, shape DOM at the molecular level. For example, changes in heteroatom (N,S) abundance and compound classes, as well as indicator molecular formulae, are linked to land-cover impacts related to agriculture, urbanization, fire and climate change. We also offer insights into areas to further open the analytical window for (U)HRMS, bridging the gap between molecular-level composition and structural analysis of unambiguous molecular tracers for anthropogenic impacts. Finally, we address practical recommendations and areas of need, including standardization and data availability, to further develop (U)HRMS utility for examining anthropogenic impacts on aquatic systems. This Review synthesizes how ultrahigh- and high-resolution mass spectrometry has decoded the molecular-level responses of dissolved organic matter to anthropogenic drivers, providing practical recommendations to advance its utility for examining anthropogenic impacts on aquatic systems.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 9","pages":"1084-1099"},"PeriodicalIF":30.7,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148981579","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}
{"title":"Engineering triangular binding pockets for efficient extraction of uranyl complexes from natural water","authors":"Doudou Cao, Cheng Zhang, Sirui Li, Yingbo Song, Jiarui Cao, Lu Luo, Xinbo Li, Yajie Yang, Yonghao Zhu, Ye Yuan, Guangshan Zhu","doi":"10.1038/s44221-026-00688-9","DOIUrl":"10.1038/s44221-026-00688-9","url":null,"abstract":"Natural aquatic systems harbour the world’s largest uranium reserves, a pivotal raw material underpinning the nuclear industry, sufficient to sustain global nuclear energy demand for millennia into the future. However, uranium extraction remains extremely challenging, attributed that uranium species form stable complexes with interfering substances (for example, CO32−, Ca2+), whereas conventional active moieties (adsorptive, catalytic) fail to interact effectively with the uranium core. Here we report a series of stable, selective and tunable adsorptive porous polymers that feature triangular binding pockets fabricated with metalloporphyrin as the wall components. The resulting adsorbent exhibits high uranium extraction capability with a removal efficiency over 96% in 1,500 min by robust micropore confinement and multi-coordination between CO32− and the porphyrin cation. We demonstrate highly efficient uranium extraction from various natural waters (lake, salt lake brine and seawater) with a capacity as high as 79.8 mg g−1 (24 days). This binding pocket design concept holds broad applicability for the rational design of versatile adsorbent materials, spanning electrochemical devices and precise molecular separation. Uranium extraction from natural waters is limited by stable uranium complexes and weak adsorbent interactions. Metalloporphyrin-based porous polymers with triangular binding pockets achieve >96% removal and capacities of up to 79.8 mg g−1.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 9","pages":"1139-1147"},"PeriodicalIF":30.7,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148981567","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}
{"title":"Redox mediator-based bacterial cooperation for anammox extracellular electron transfer","authors":"Ru Zheng, Baiyizhuo Chen, Lingrui Kong, Ziyi Sun, Jiangwei Wang, Jingqi Sun, Qile Zhu, Sitong Liu","doi":"10.1038/s44221-026-00683-0","DOIUrl":"10.1038/s44221-026-00683-0","url":null,"abstract":"Anaerobic ammonium oxidation (anammox) plays a crucial role in efficient, low-carbon and sustainable nitrogen removal. Here we show that anammox bacteria, in cooperation with symbiotic bacteria and without a complete cytochrome c conduit, oxidize ammonium via extracellular electron transfer (EET) in the absence of nitrite through redox mediators embedded in extracellular polymeric substances. γ-Proteobacteria (Zeimonas sp.) and Actinobacteria (Candidatus ATN2) produce quinones and Planctomycetes (Candidatus CAADGN01) synthesize phenazines as electron shuttles. The anammox bacteria couple ammonium oxidation and EET by upregulating hydroxylamine oxidase, oxidoreductases and intracellular multi-haem cytochrome c. In return, they secrete essential vitamins and amino acids to support the growth of symbiotic bacteria. Global metagenomic analysis of 7,412 samples verified the widespread co-occurrence of anammox bacteria and redox mediator-producing symbiotic bacteria mainly in artificial ecosystems, such as bioreactors and wastewater treatment plants. This study reveals redox mediator-based cooperation for anammox with EET and the results imply a feasible strategy of redox mediator-enhanced EET in wastewater treatment. Anammox is a key low-carbon nitrogen removal process. Here anammox bacteria are found to couple ammonium oxidation to extracellular electron transfer with symbiotic bacteria via redox mediators within extracellular polymeric substances.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 8","pages":"1007-1017"},"PeriodicalIF":30.7,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754322","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}
Nature waterPub Date : 2026-07-20DOI: 10.1038/s44221-026-00678-x
Steven P. Djordjevic, Veronica M. Jarocki
{"title":"From antibiotics to after-products","authors":"Steven P. Djordjevic, Veronica M. Jarocki","doi":"10.1038/s44221-026-00678-x","DOIUrl":"10.1038/s44221-026-00678-x","url":null,"abstract":"Antimicrobial resistance risk has long been framed around the fate of parent antibiotics in the environment. Community-level selection assays show that transformation products can remain bioactive and sustain antimicrobial resistance selection.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 7","pages":"843-844"},"PeriodicalIF":30.7,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148519495","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}
Nature waterPub Date : 2026-07-20DOI: 10.1038/s44221-026-00673-2
Waye Zhang
{"title":"Sensing before drinking","authors":"Waye Zhang","doi":"10.1038/s44221-026-00673-2","DOIUrl":"10.1038/s44221-026-00673-2","url":null,"abstract":"Access to safe drinking water remains a global challenge. A low-cost, self-powered floating device points to a new direction in smart water treatment by unifying contaminant detection and disinfection in a single platform.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 7","pages":"841-842"},"PeriodicalIF":30.7,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148519490","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}
Nature waterPub Date : 2026-07-07DOI: 10.1038/s44221-026-00676-z
Joel Podgorski, Michael Berg
{"title":"Manganese, a hidden threat to global water quality and health","authors":"Joel Podgorski, Michael Berg","doi":"10.1038/s44221-026-00676-z","DOIUrl":"10.1038/s44221-026-00676-z","url":null,"abstract":"Manganese (Mn) is an essential element for human nutrition with the bulk of intake typically coming from food. However, Mn concentrations in drinking water can be substantial, and high levels of overall Mn consumption may be toxic. Recognizing detrimental health effects particularly for infants, the World Health Organization lowered its guideline for Mn in drinking water from 400 µg l−1 to 80 µg l−1 in 2021. Here, to assess the implications of this change on affected regions and populations, machine learning was used with a large dataset of groundwater Mn concentrations and relevant environmental parameters to generate global prediction maps of manganese. Considering populations reliant on untreated groundwater, we estimate that about 180–220 million people are at risk to Mn contamination >80 µg l−1 in drinking water, a four to fivefold increase from about 45 million people at the previous guideline of 400 µg l−1. The number of people potentially impacted by high Mn is comparable to that for geogenic arsenic (As) and fluoride, though Mn receives much less attention. Despite Mn and As accumulating under reducing geochemical conditions, the occurrence of high concentrations of Mn and As generally does not overlap. Since groundwater buffers climate impacts and supports half the world’s population, the presented novel risk maps help locate and secure safe sources. Manganese contamination in groundwater poses considerable health risks. Global hazard maps generated with machine learning reveal that 180–220 million individuals are at risk, emphasizing the need for monitoring and treatment strategies.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 8","pages":"954-964"},"PeriodicalIF":30.7,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s44221-026-00676-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754313","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}
Nature waterPub Date : 2026-07-02DOI: 10.1038/s44221-026-00672-3
Andrea Citrini, Bridget R. Scanlon, Ashraf Rateb, Gang Zhao, Matteo Sangiorgio, Lorenzo Rosa
{"title":"Global managed aquifer recharge potential as a solution to water scarcity","authors":"Andrea Citrini, Bridget R. Scanlon, Ashraf Rateb, Gang Zhao, Matteo Sangiorgio, Lorenzo Rosa","doi":"10.1038/s44221-026-00672-3","DOIUrl":"10.1038/s44221-026-00672-3","url":null,"abstract":"Groundwater overexploitation from irrigated agriculture is accelerating in major food-producing regions, threatening long-term water and food security. Managed aquifer recharge (MAR), the intentional storage of available water in aquifers, could help buffer hydrologic extremes by diverting high flows for infiltration. Here we present a first-order global screening of spreading-based MAR potential across irrigated lands (2002–2021) by integrating Gravity Recovery and Climate Experiment-derived monthly groundwater depletion, high-magnitude flow and unsustainable irrigation water consumption. We estimate high-magnitude flow volumes under 90th and 95th percentile thresholds and weight them with a region-/monthly-specific feasibility coefficient representing infiltration suitability, evaporative competition and off-season crop-area availability. Globally, MAR could offset 4–6% of unsustainable irrigation, with hotspots reaching more than 50% offset (for example, Europe and Southeast Asia) but lower potential in basins such as the Ganges and the Central Valley (3–7%). Our results warrant subsequent regional assessments to evaluate technical, economic and governance/policy feasibility, as well as site-specific design. Managed aquifer recharge (MAR) enhances water-supply resilience by storing surplus water in aquifers as a buffer against dry periods. This global assessment identifies where MAR spreading, which relies on natural surface infiltration, may offer a feasible approach to addressing irrigation-induced water scarcity.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 8","pages":"965-978"},"PeriodicalIF":30.7,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754318","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}
Nature waterPub Date : 2026-06-30DOI: 10.1038/s44221-026-00681-2
Pooja Lakhey, April Hayes, Aimee K. Murray, Jinglong Li, Kevin V. Thomas, William H. Gaze, Jake W. O’Brien
{"title":"Author Correction: Antibiotic transformation products exert selective pressure for antimicrobial resistance comparable to parent compounds","authors":"Pooja Lakhey, April Hayes, Aimee K. Murray, Jinglong Li, Kevin V. Thomas, William H. Gaze, Jake W. O’Brien","doi":"10.1038/s44221-026-00681-2","DOIUrl":"10.1038/s44221-026-00681-2","url":null,"abstract":"","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 9","pages":"1190-1190"},"PeriodicalIF":30.7,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s44221-026-00681-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148981559","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}
Nature waterPub Date : 2026-06-24DOI: 10.1038/s44221-026-00671-4
Wyatt Arnold, Matteo Giuliani, Andrea Castelletti
{"title":"Balancing equity and efficiency in transboundary water systems with Atkinson’s welfare function","authors":"Wyatt Arnold, Matteo Giuliani, Andrea Castelletti","doi":"10.1038/s44221-026-00671-4","DOIUrl":"10.1038/s44221-026-00671-4","url":null,"abstract":"Water resources optimization conventionally maximizes system-wide efficiency, treating distributional equity as secondary. Here we present a framework that directly incorporates equity into optimization using Atkinson’s inequality measure. This approach makes distributional value judgements transparent through a single, interpretable inequality aversion parameter that spans principles from utilitarian efficiency to Rawlsian justice, enabling stakeholders to negotiate between efficiency and fairness. Applied to hydropower operations and floating photovoltaic expansion in the Zambezi Watercourse, we demonstrate that substantial equity improvements (3–25 percentage point reduction in the Atkinson index) can be achieved with minimal efficiency sacrifices (1.0–4.2% of total hydropower generation). These gains arise through increases in reliable (‘firm’) power generation, enhancing drought resilience for the most vulnerable riparian states. The framework adapts to changing objectives, prioritizing investments towards disadvantaged actors without requiring predetermined weights or hierarchies. The methodology generalizes to any multi-actor resource allocation problem in which monotonically increasing, concave objectives create scope for welfare-improving redistribution. Despite increasing emphasis on distributional equity in transboundary water negotiations, most water resource models include it only indirectly through embedded assumptions or constraints, if at all. This work uses the Atkinson welfare function to transparently incorporate equity into optimization, enabling systematic evaluation of how changes in fairness priorities affect efficiency.","PeriodicalId":74252,"journal":{"name":"Nature water","volume":"4 10","pages":"1259-1270"},"PeriodicalIF":30.7,"publicationDate":"2026-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s44221-026-00671-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149190066","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}