ACS ES&T waterPub Date : 2026-10-09Epub Date: 2026-09-16DOI: 10.1021/acsestwater.6c00823
Sabrina N. Volponi, Brandon J. Sansom, Diogo Bolster, Katy E. Klymus
{"title":"Hyporheic eDNA Removal Outweighs Water Column Degradation in a Natural River","authors":"Sabrina N. Volponi, Brandon J. Sansom, Diogo Bolster, Katy E. Klymus","doi":"10.1021/acsestwater.6c00823","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00823","url":null,"abstract":"<p>Advances in the measurement of environmental DNA (eDNA)have transformedbiodiversity monitoring in aquatic ecosystems. However, linking eDNAconcentrations in streams and rivers to species abundance remainschallenging as flowing water, streambed retention, and degradationcombine to transport eDNA away from its origin point and dilute it.Here, we apply a continuous time random walk model to jointly analyzeconservative (Rhodamine WT) and eDNA tracer profiles collected acrossa morphologically complex reach of a natural river (Missouri, USA),in order to quantify the role of water column and hyporheic residencetimes in driving eDNA losses. Modeled hyporheic removal rates (degradationand physical retention) are one to five orders of magnitude greaterthan water column degradation rates, indicating that the subsurfacedominates reach-scale eDNA losses in the study river. These resultsdemonstrate that eDNA removal is strongly shaped by spatially varyinghydrologic processes, particularly hyporheic exchange, and that relyingsolely on laboratory degradation rates may substantially underestimatein-stream eDNA loss.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6672–6684"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153119","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 : 2026-10-09Epub Date: 2026-09-15DOI: 10.1021/acsestwater.6c00501
Sensen Xu, Yi Pan, Yanchao Wang, Shuangchun Yang, Manglai Gao
{"title":"Research Progress on the Application of Ceramic Membranes in Wastewater Treatment of the Petroleum and Petrochemical Industry","authors":"Sensen Xu, Yi Pan, Yanchao Wang, Shuangchun Yang, Manglai Gao","doi":"10.1021/acsestwater.6c00501","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00501","url":null,"abstract":"<p>Ceramic membranes have become a key separation technologyfor treatingcomplex pollutants in the petrochemical industry due to their excellentresistance to extreme conditions, high separation efficiency, andextended service life. This review systematically summarizes the applicationprogress of ceramic membranes in treating oily, high-salinity, andphenol-containing wastewater, and clarifies the technical compatibilitybetween membrane material properties and the characteristics of petrochemicalwastewater. The technological development has mainly progressed alongthree paths: surface functional modification, structural optimization,and multiprocess coupling. Ceramic membranes have demonstrated efficientoil removal in oily wastewater treatment, excellent salt rejectionin high-salinity streams via nanofiltration (NF), reverse osmosis(RO), and membrane distillation (MD), and outstanding phenol degradationin phenol-laden wastewater, with successful industrial applicationsin offshore produced water reinjection and catalytic slurry solidremoval. However, several bottlenecks remain, including severe membranefouling, high operating costs, insufficient adaptability to complexwastewater matrices, and a low level of intelligence. Future developmenttrends are directed toward functional composite membranes, intelligentprocess integration, resource recovery, and cost reduction. This reviewprovides a scientific reference for further technological innovationand large-scale application of ceramic membranes in the petrochemicalindustry, supporting the sector’s transition toward efficientpollution control and green, low-carbon development.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6124–6148"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152843","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 : 2026-10-09Epub Date: 2026-09-01DOI: 10.1021/acsestwater.6c00710
Matthew J. Berens, Andrew Wood, Randall Kolka, Chan Lan Chun
{"title":"Activated Carbon Reshapes the Relationship between Mercury Methylation and Sulfate Reduction in a Sediment Bioelectrochemical Treatment System","authors":"Matthew J. Berens, Andrew Wood, Randall Kolka, Chan Lan Chun","doi":"10.1021/acsestwater.6c00710","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00710","url":null,"abstract":"<p>Mercury (Hg) methylation is tightly linked to the activityof sulfate-reducingbacteria (SRB). Bioelectrochemical systems (BESs) have been proposedto remediate excess sulfate in freshwater systems, but their effectson coupled Hg and sulfur cycling remain poorly understood. Here, wedeveloped a novel BES to investigate how applied voltage and activatedcarbon (AC) interact to regulate sulfate reduction and Hg(II) methylationkinetics in sediments from a sulfate-impacted stream. Methylationpotentials did not track bulk sulfate reduction across treatments:AC suppressed methylation by up to 80%, applied voltage stimulatedsulfate reduction but slightly decreased methylation in AC–mesocosms, and the combined AC and voltage treatment maintained methylationat levels comparable to voltage alone. This observation was reflectedin shifts among methylating taxa. <em>Desulfobulbus</em>,a genus capable of direct electron transfer to graphite electrodes,was preferentially enriched in RNA relative to DNA across all mesocosms,and the <em>hgcAB</em> genes associated with <em>Geobacteraceae</em> were elevated under applied voltage. These results indicate thatapplied voltage enriches electroactive Hg methylators rather thanbroadly stimulating SRB activity, a process that may be facilitatedby electron conduction through AC. This feature of BES operation shouldbe considered when coapplying sorbent amendments and electrochemicalpotential in Hg-contaminated freshwater systems.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6555–6564"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152900","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 : 2026-10-09Epub Date: 2026-09-22DOI: 10.1021/acsestwater.6c00658
Frederick Kwame Yeboah, Hui Li, Gengyuan Liu, Sai Liang, Qiumeng Zhong, Anja du Plessis
{"title":"Assessing the Impact of Multiregional Socioeconomic Transition on Water Use in Africa","authors":"Frederick Kwame Yeboah, Hui Li, Gengyuan Liu, Sai Liang, Qiumeng Zhong, Anja du Plessis","doi":"10.1021/acsestwater.6c00658","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00658","url":null,"abstract":"<p>Reducing water scarcity in Africa has become a criticalsustainabledevelopment goal with the intensification of global trade and rapidsocioeconomic changes. Assessing the impact of multiregional socioeconomictransition on Africa’s water use is therefore a prerequisitefor alleviating water scarcity. This study examined the impact ofinternal and external socioeconomic transition on water use changesin five major African countries (Egypt, South Africa, Ethiopia, Nigeria,and Cameroon) during 2000–2021. The results indicate that totalwater use of emerging African countries (Ethiopia, Nigeria, and Cameroon)has increased, with rising final demand level in East Asia and thePacific (EAP) constituting the dominant driver of this growth. Incontrast, technological progress within the selected African countrieshas reduced water use intensity and thereby partially offset the upwardpressure on water use. Changes in external production and consumptionstructures, particularly adjustments in the European Union’sproduction structure, have further contributed to reductions in Africanwater use, with the associated water-saving effect being approximatelytwice as large as that of internal production structure changes. Thefindings highlight the critical role of inter-regional cooperationand targeted optimization of economic structures in steering Africatoward a more water-efficient development pathway.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6516–6528"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153070","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 : 2026-10-09Epub Date: 2026-09-25DOI: 10.1021/acsestwater.6c00859
Md Rashid Al Mamun, Soliu O. Ganiyu, Isaac Sánchez-Montes, Nora A. S. Hussain, Marj Gem Bunda-Fajunio, Bin Xu, James L. Stafford, Mohamed Gamal El-Din
{"title":"A Systematic Study of Solar-Assisted ZnS Catalysis for Treating Model Naphthenic Acid and Oil Sands Process Water: Effects of Synthesis Parameters, Kinetics, and Toxicity Evaluation","authors":"Md Rashid Al Mamun, Soliu O. Ganiyu, Isaac Sánchez-Montes, Nora A. S. Hussain, Marj Gem Bunda-Fajunio, Bin Xu, James L. Stafford, Mohamed Gamal El-Din","doi":"10.1021/acsestwater.6c00859","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00859","url":null,"abstract":"<p>Oil sands operations produce large quantities of oilsands processwater (OSPW), which contains persistent and toxic naphthenic acids(NAs). In this study, ZnS with different Zn/S molar ratios was synthesizedand evaluated for the first time for the degradation of a single modelNA (5-phenyl valeric acid, PVA), a mixture of seven classical NAs,and natural NAs in real OSPW. ZnS with a 1:2 Zn/S ratio exhibitedthe highest PVA degradation (>93%), following pseudo-first-orderkinetics(<em>k</em> = 0.319 h<sup>–1</sup>). The enhanced activitywas attributed to increased surface area and pore volume, smallercrystalline size, and reduced bandgap energy. PVA degradation byproductsand pathways were also evaluated. ZnS effectively degraded structurallydiverse NAs, with cyclohexanepentanoic acid (CHPA) and decanoic acid(DA) showing the highest efficiencies, likely due to their high carbonnumbers (C<sub>10</sub> and C<sub>11</sub>) and alkyl-branched linearstructures. In real OSPW, fluorophore organic compounds (FOCs) withtwo and three fused rings showed >87% degradation, while approximately60% of classical NAs (O<sub>2</sub>–NAs) were removed. Treatmentalso significantly reduced the immunotoxicity and cytotoxicity ofOSPW. Overall, these findings demonstrate the potential of solar-assistedZnS photocatalysis for treating naturally occurring NAs in industriallyaffected waters.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6708–6724"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153217","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 : 2026-10-09Epub Date: 2026-09-30DOI: 10.1021/acsestwater.6c01166
Edwin I. Ochedikwu, Akshat Verma, Shankararaman Chellam, Benjamin A. Wilhite, Jodie Lutkenhaus
{"title":"Kinetic Modeling of Iron Electrocoagulation in Moderate to Slightly Acidic Media","authors":"Edwin I. Ochedikwu, Akshat Verma, Shankararaman Chellam, Benjamin A. Wilhite, Jodie Lutkenhaus","doi":"10.1021/acsestwater.6c01166","DOIUrl":"https://doi.org/10.1021/acsestwater.6c01166","url":null,"abstract":"<p>Electrocoagulation is an emerging process for water andwastewatertreatment. However, there is a gap in understanding the effects ofelectrocoagulation operation (i.e., pH, applied current, electrodeconfiguration) and the concentration dependencies of reactive speciesinvolved in the degradation of contaminants. Here, we show the developmentand validation of a batch reactor kinetic model for an electrocoagulationprocess in moderate to slightly acidic media for water treatment,guided by experimental data of electrocoagulation in synthetic wastewaterat pH values of 5.0, 5.5, 6.0, and 6.5. The kinetic model uniquelypredicts the full transient profile of the ferryl ion, a short-livedreactive oxygen species (ROS), coupling anode, cathode, and bulk Fentonchemistry in a single model validated against measured Fe(II), dissolvedoxygen (DO), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), and thesum of Fe(II) and Fe(III) concentrations. Our findings predict therapid turnover and low concentration (<1.80 μg/L) of theferryl ion as a reactive intermediate species. Interestingly, thekinetic model predicts that lower electrocoagulation currents yieldhigher ferryl ion concentrations. Further, increased electrocoagulationtime results in faster consumption of the ferryl ion after the electrocoagulationstep. The implication is that these results provide a guiding frameworkfor designing electrocoagulation processes.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6833–6845"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153245","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 : 2026-10-09Epub Date: 2026-09-15DOI: 10.1021/acsestwater.6c00609
Hannah Lukasik, Rachel Kozloski, Marin Monteith, Monica M. Arienzo
{"title":"Large Seasonal Variation in Microplastic Concentration from the Truckee River, United States","authors":"Hannah Lukasik, Rachel Kozloski, Marin Monteith, Monica M. Arienzo","doi":"10.1021/acsestwater.6c00609","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00609","url":null,"abstract":"<p>Microplastics (MPs) are ubiquitous in riverine environmentsworldwide,but arid river systems, characterized by large seasonal variationsin discharge, remain understudied. Using a peristaltic pump, we collectedsamples for MP surface concentration analysis along the Truckee Riverin the western United States. Samples were collected using a 100 μmfilter during fall 2022 and spring 2023 across 6 and 8 sites, respectively.The samples were analyzed with microscope-enabled Fourier TransformInfrared spectroscopy, and the resulting MP concentrations were comparedto land use and river discharge. MP concentrations were higher inspring (mean 3.7 MP/L) than in fall (mean 0.4 MP/L), coinciding withan increase in river discharge. Statistical analyses revealed significantseasonal differences in polymer composition because of increased concentrationsof poly(ethylene terephthalate), polyethylene, and rubber in spring.These patterns likely reflect increased spring discharge mobilizingMPs from the surrounding landscape and riverbed sediments. These findingsunderscore the complexity of MP sources and transport and highlightthe importance of seasonal sampling across discharge and land-usetypes. Additionally, polypropylene, poly(ethylene terephthalate),and polyethylene were the dominant polymer types overall, demonstratingthat reducing single-use plastic in the Truckee River Basin is importantfor protecting the river’s water quality.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6435–6444"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152844","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 : 2026-10-09Epub Date: 2026-08-07DOI: 10.1021/acsestwater.6c00738
Paramon Koutorjevski, Qian Zhang, Xiaying Xin
{"title":"The Feasibility and Sustainability of Microcystis aeruginosa Removal with Nanobubble-Assisted Coagulation Using Polyaluminum Chloride (PACl) under Real Drinking Water Conditions","authors":"Paramon Koutorjevski, Qian Zhang, Xiaying Xin","doi":"10.1021/acsestwater.6c00738","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00738","url":null,"abstract":"<p>Inorganiccoagulants such as polyaluminum chloride (PACl) are widelyused in conventional drinking water treatment systems to effectivelyreduce turbidity and remove contaminants across diverse water matrices;however, they are associated with high chemical demand, operationalcosts, and potential health and environmental concerns. This studydemonstrates that integrating nonmodified nanobubbles (NBs) duringthe rapid-mixing stage of the coagulation process (NB-assisted coagulation)considerably enhances treatment performance compared to using PAClalone. Experiments were conducted in water samples collected fromLake Ontario to evaluate the performance of NB-assisted coagulationin real-water matrices. <em>Microcystis aeruginosa</em> wasemployed as a model contaminant due to its relevance as an emergingissue in water treatment systems and its ability to indicate intracellularcyanotoxin release via potential cell lysis. Results showed that cyanotoxinconcentrations in NB-assisted systems were comparable to those inconventional coagulation, confirming that NBs do not disrupt cellsor induce toxin release. Moreover, NB-assisted coagulation achievedequivalent or improved contaminant removal efficiency at reduced coagulantdosages, thereby lowering chemical consumption and the environmentalfootprint. The sustainability and economic benefits were further evaluatedthrough a life cycle assessment and cost analysis for a hypotheticalwater treatment system incorporating an NB generator.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6576–6589"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153133","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 : 2026-10-09Epub Date: 2026-09-07DOI: 10.1021/acsestwater.6c00295
Papri Mondal, Jit Satra, Bibhutosh Adhikary
{"title":"Photocatalysis-Assisted Absorption-Based Ultrasensitive As3+ Sensing Using an LRET-Driven UV–Vis–NIR Upconversion System","authors":"Papri Mondal, Jit Satra, Bibhutosh Adhikary","doi":"10.1021/acsestwater.6c00295","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00295","url":null,"abstract":"<p>We developed an eco-friendly photochemical sensor basedon Er<sup>3+</sup>/Yb<sup>3+</sup>-codoped Ag<sub>2</sub>MoO<sub>4</sub> upconversionnanoparticles (UCNPs) decorated with MnO<sub>2</sub> (cod-AMO-3/MnO<sub>2</sub>) for the selective and ultrasensitive detection of As<sup>3+</sup> in water. The sensor uses metronidazole (MNZ) degradationkinetics as a simple absorption-based sensing platform for As<sup>3+</sup>, eliminating the need for complex instrumentation or costlyreagents. The cod-AMO-3/MnO<sub>2</sub> nanocomposite (NComp) promotesefficient photocatalytic MNZ degradation through photoinduced chargeseparation facilitated by luminescence resonance energy transfer (LRET).Under optimized conditions, NComp achieved 99% MNZ degradation within28 min under ultraviolet (UV) irradiation, 99.16% within 63 min undervisible (vis) light, and 95.58% within 120 min under near-infrared(NIR) irradiation. Full-spectrum solar irradiation further enhancedthe activity, achieving 99.07% degradation within 15 min. The presenceof trace As<sup>3+</sup> altered the charge separation dynamics ofthe NComp, producing measurable changes in MNZ degradation kinetics.This enabled selective As<sup>3+</sup> detection over a linear rangeof 0–150 ppb with a detection limit (LOD) of 0.026 ppb, outperformingmany traditional detection techniques and aligning closely with ourprevious photoluminescence-based sensor (LOD: 0.028 ppb). The proposedabsorption-based strategy provides a simpler and more accessible alternativeto photoluminescence-based detection, demonstrating the potentialof UCNP-based nanocomposites for practical arsenic monitoring in water.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6292–6304"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149153118","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 : 2026-10-09Epub Date: 2026-09-15DOI: 10.1021/acsestwater.6c00735
Meiqi Yang, Fernando Temprano-Coleto, Hongxu Chen, Sunxiang Zheng, Christopher Li, Kaijie Yang, Aashish Khandelwal, Howard A. Stone, Zhiyong Jason Ren
{"title":"Cellulose Fiber Crystallizer for Continuous Evaporative Lithium Enrichment from Low-Quality Brines","authors":"Meiqi Yang, Fernando Temprano-Coleto, Hongxu Chen, Sunxiang Zheng, Christopher Li, Kaijie Yang, Aashish Khandelwal, Howard A. Stone, Zhiyong Jason Ren","doi":"10.1021/acsestwater.6c00735","DOIUrl":"https://doi.org/10.1021/acsestwater.6c00735","url":null,"abstract":"<p>Lithium is a critical mineral witha rapidly expanding global market.Nontraditional sources such as oilfield brines have emerged as promisingyet underutilized sources of lithium. However, existing extractiontechniques, including evaporation ponds and direct lithium extractionmethods, face substantial limitations when applied to these diluteresources, including prolonged processing times, high energy and freshwaterrequirements, and low selectivity between lithium and competing monovalentions, making lithium recovery from low-concentration brines inefficientand economically unattractive. In this study, we present a continuousand passive lithium extraction approach utilizing a fiber crystallizerdriven by a capillary siphon process. With a simplified monovalentMarcellus-type brine, the system achieved 596-fold lithium enrichmentand a maximum Li<sup>+</sup>/Na<sup>+</sup> separation factor of 11,182through staged fractional crystallization. For a more complex brinecontaining high Ca<sup>2+</sup> and Mg<sup>2+</sup>, lithium was enrichedapproximately 17-fold, from approximately 95 mg L<sup>–1</sup> to 1.641 g L<sup>–1</sup>, with approximately 87% lithiumrecovery and a Li<sup>+</sup>/Na<sup>+</sup> separation factor ofapproximately 182. These results demonstrate the strong potentialof fiber crystallization for lithium extraction from complex oilfieldbrines, with pretreatment offering further opportunities to improveperformance.</p>","PeriodicalId":93847,"journal":{"name":"ACS ES&T water","volume":"6 10","pages":"6590–6600"},"PeriodicalIF":4.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152845","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}