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Comparative Evaluation of Water Hyacinth-Derived Biomass, Biochar, and Nanobiochar for Environmental Remediation: A Review. 水葫芦衍生生物质、生物炭和纳米生物炭在环境修复中的比较评价
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70577
Balasubramani Devadharshini, Mohan Prasanthrajan, Subramani Krishnaraj Rajkishore, Desikan Ramesh, Pandian Kannan, Chi-Hwa Wang, Alagirisamy Bharani
{"title":"Comparative Evaluation of Water Hyacinth-Derived Biomass, Biochar, and Nanobiochar for Environmental Remediation: A Review.","authors":"Balasubramani Devadharshini, Mohan Prasanthrajan, Subramani Krishnaraj Rajkishore, Desikan Ramesh, Pandian Kannan, Chi-Hwa Wang, Alagirisamy Bharani","doi":"10.1002/wer.70577","DOIUrl":"10.1002/wer.70577","url":null,"abstract":"<p><p>Eichhornia crassipes (water hyacinth) is an invasive aquatic macrophyte whose lignocellulosic biomass poses environmental challenges while offering valorization potential. This review examines the thermochemical conversion of water hyacinth into biomass, biochar, and nanobiochar, covering production pathways, process parameters, and remediation performance. High cellulose and hemicellulose content, combined with mineral bioaccumulation, supports efficient pyrolysis, with temperature and residence time governing surface area, pore architecture, and material stability. Studies demonstrate the effective removal of heavy metals, nutrients, dyes, and organic contaminants using water hyacinth-derived biomass, biochar, and nanobiochar, with adsorption performance generally increasing from biomass to biochar and reaching its highest level in nanobiochar because of progressively greater surface area, pore development, and surface reactivity. Ecotoxicological profiling indicates a corresponding increase in potential toxicity from biomass to biochar and nanobiochar, highlighting the need for precautionary deployment and comprehensive risk assessment before field-scale applications. Collectively, biochar stands out in terms of adsorption performance, low toxicity, and economic feasibility.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70577"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149076010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Multiscale Water Balance Analysis and Water Network Resilience Optimization in the Yellow River Basin. 黄河流域多尺度水平衡分析与水网络弹性优化。
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70613
Tao Du, Zhilei Yu, Dengming Yan, Ze Yuan, Zhong Lu, Yan Xu, Quanlai Ma, Chouke Yang
{"title":"Multiscale Water Balance Analysis and Water Network Resilience Optimization in the Yellow River Basin.","authors":"Tao Du, Zhilei Yu, Dengming Yan, Ze Yuan, Zhong Lu, Yan Xu, Quanlai Ma, Chouke Yang","doi":"10.1002/wer.70613","DOIUrl":"10.1002/wer.70613","url":null,"abstract":"<p><p>As a core region for ecological security, food production, and energy supply in China, the hydrological cycle of the Yellow River Basin is being profoundly altered by climate change and intensive human activities, leading to growing systemic water scarcity and increasingly heterogeneous hydrological processes. However, the lack of long-term and high-resolution hydrological data has constrained the accurate characterization of multilayer water exchange processes among the atmosphere, surface water, and groundwater at the basin scale, thereby limiting the development of sustainable water resource management strategies. This study integrates multisource remote sensing data with hydrological models to reveal the spatiotemporal evolution of the basin water cycle and to develop a resilience-oriented water network for sustainable management. By integrating remote sensing products such as GRACE and ETMonitor with distributed hydrological models, the study systematically evaluated the multilevel water balance dynamics of the Yellow River Basin from atmospheric precipitation to groundwater storage during 1991-2020. The results show that the remotely sensed groundwater storage anomaly (GWSA) agrees well with in situ groundwater-level observations at the regional scale. The ETMonitor model performs well in estimating evapotranspiration over vegetated areas, with a validation root mean square error (RMSE) of 0.93 mm/day. The study revealed a pronounced spatiotemporal pattern of \"water surplus in the west and water deficit in the east\" across the Yellow River Basin, with the polarization intensifying under the combined effects of upstream climatic warming and humidification and intensive water consumption in the middle and lower reaches. Based on improved intelligent algorithms and channel topology constraints, this study proposed an optimized basin water network scheme. After optimization, the areal extent of water-deficient regions decreased substantially, water stress in the middle and lower reaches was alleviated, and both the balance and the efficiency of basin-wide water allocation improved. This research provides a quantitative basis for refined water resource management, water-saving irrigation retrofitting, and optimized planning of the national water network in the Yellow River Basin.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70613"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149184754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Wastewater Biovalorization for Sustainable Renewable Energy Production: Integration of Energy Storage Technologies. 可持续可再生能源生产的废水生物增值:能源存储技术的集成。
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70627
Ramya Mohan, V Rajinikanth, Mathiyazhagan Narayanan
{"title":"Wastewater Biovalorization for Sustainable Renewable Energy Production: Integration of Energy Storage Technologies.","authors":"Ramya Mohan, V Rajinikanth, Mathiyazhagan Narayanan","doi":"10.1002/wer.70627","DOIUrl":"https://doi.org/10.1002/wer.70627","url":null,"abstract":"<p><p>The shift to a circular bioeconomy has shifted water from waste to a resource for renewable energy and resource recovery. Biological, electrochemical, and thermochemical conversion processes can be used to produce biofuels, bioelectricity, biohydrogen, bio-products, and biogas from wastewater, all of which contain high levels of organic matter, nutrients, and microorganisms that can be used for the production. The intermittency of renewables production, however, and the variability of wastewater composition demand the need to integrate the use of advanced energy storage technologies to guarantee stable, efficient, and resilient energy systems. The wastewater biovalorization pathways are presented and coupled with advanced energy storage technologies like lithium-ion, sodium-ion and flow batteries, supercapacitors, hydrogen storage, and thermal energy storage. The thermochemical conversion technologies, such as pyrolysis, gasification, hydrothermal liquefaction, and hydrothermal carbonization, are critically discussed with the biological approaches such as anaerobic digestion, microbial fuel cells, microbial electrolysis cells, algal biorefineries, and biochar production. Moreover, the recent advances in artificial intelligence, digital twins, monitoring on the Internet of Things, and smart energy management of wastewater treatment plants have been reviewed. Techno-economic feasibility, life cycle assessment, commercialization prospects, and policy considerations are also evaluated in the review. Finally, key technological challenges and future research directions to speed up the development of integrated wastewater-to-energy systems that will boost carbon neutrality, energy security, and sustainable water management in a circular bioeconomy are identified.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70627"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149184786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Carbon-Based Microbial-Electro-Fenton Systems for Microplastic-Contaminated Wastewater: Mechanistic Basis, Photo-Bio Hybrid Strategies, and Research Priorities. 微塑料污染废水的碳基微生物-电fenton系统:机理基础,光-生物混合策略和研究重点。
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70629
Imran Ahmad, Shameem Ahmad, Syed Md Humayun Akhter, Raghib Nadeem
{"title":"Carbon-Based Microbial-Electro-Fenton Systems for Microplastic-Contaminated Wastewater: Mechanistic Basis, Photo-Bio Hybrid Strategies, and Research Priorities.","authors":"Imran Ahmad, Shameem Ahmad, Syed Md Humayun Akhter, Raghib Nadeem","doi":"10.1002/wer.70629","DOIUrl":"https://doi.org/10.1002/wer.70629","url":null,"abstract":"<p><p>The widespread occurrence of microplastics (MPs) in aquatic environments has become a major environmental concern because conventional wastewater treatment plants primarily retain these particles in sewage sludge rather than achieving their degradation or mineralization. Microbial-electro-Fenton systems (MEFSs) have recently emerged as a promising bio-electro-chemical advanced oxidation technology that integrates microbial extracellular electron transfer (EET) with electro-Fenton (EF) chemistry for the in situ generation of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and hydroxyl radicals (•OH). This review critically evaluates recent advances in carbon-based electrode engineering, microbial electron transfer mechanisms, molecular regulation of the two-electron oxygen reduction reaction (2e<sup>-</sup> ORR), and photo-bio hybrid enhancement for the treatment of MP-contaminated wastewater. Emphasis is placed on the distinct roles of anodic biofilms and cathodic electrocatalysts, polymer-specific degradation pathways, and the successive stages of MP transformation, including surface oxidation, polymer-chain scission, fragmentation, and mineralization. The influence of reactor configuration, wastewater matrix, and carbon electrode properties on H<sub>2</sub>O<sub>2</sub> electro-generation, reactive oxygen species production, and degradation efficiency is comprehensively discussed. In addition, current challenges associated with electrode fouling, long-term durability, real wastewater treatment, scale-up, and techno-economic and environmental sustainability are critically assessed. Rather than presenting MEFS as a mature treatment technology, this review identifies the key mechanistic and engineering challenges that must be addressed before practical implementation. Finally, future research priorities are proposed to facilitate the transition of MEFS from laboratory-scale investigations toward pilot-scale validation and sustainable wastewater treatment for MP remediation.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70629"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Safer Food Production With Reclaimed Wastewater: Linking Biological Treatment, Microbial Quality, and Heavy-Metal Risk. 利用再生废水生产更安全的食品:生物处理、微生物质量和重金属风险的联系。
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70633
M A El-Shawadfy, Ahmed Abukhadrah, Adel M A Elhdad, Shin-Ichi Morita, Emad M Hafez, Mohamed M Abdel-Galeil, Zhicheng Luo, Samir I Gadow
{"title":"Safer Food Production With Reclaimed Wastewater: Linking Biological Treatment, Microbial Quality, and Heavy-Metal Risk.","authors":"M A El-Shawadfy, Ahmed Abukhadrah, Adel M A Elhdad, Shin-Ichi Morita, Emad M Hafez, Mohamed M Abdel-Galeil, Zhicheng Luo, Samir I Gadow","doi":"10.1002/wer.70633","DOIUrl":"https://doi.org/10.1002/wer.70633","url":null,"abstract":"<p><p>Agricultural wastewater reclamation can reduce freshwater demand, but crop productivity must be balanced against contaminant transfer. We evaluated UASB-aerobic effluent produced at a 6-h UASB hydraulic retention time in a factorial greenhouse experiment with squash, six irrigation-water treatments, and three field capacity levels (100%, 80%, and 60%; N = 54). Water source × field capacity interactions were significant for all 12 agronomic outcomes (p < 0.001). At 80% field capacity, untreated wastewater (UTW) produced the highest shoot fresh biomass (80.30 g plant<sup>-1</sup>), whereas treated wastewater (TW) maintained 85.3% of this maximum (68.53 g plant<sup>-1</sup>) and did not differ significantly from freshwater (Tukey-adjusted p = 0.484). TW fruit had lower measured Cu, Mn, and Zn concentrations than UTW, while Cr, Ni, Co, and Pb were below instrumental detection limits. Descriptive pooled-soil analyses showed lower electrical conductivity and total and fecal coliform counts under TW than UTW. Fruit-metal and soil assessments were restricted to FW, TW, and UTW at 80% field capacity. Under the tested conditions, TW maintained substantial squash biomass while reducing measured fruit-metal exposure relative to UTW.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149273744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Electrospinning-Graphene Promoted Low-Temperature Nitrogen Removal of Immobilized ANAMMOX Granules. 电纺丝-石墨烯促进固定化厌氧氨氧化颗粒的低温脱氮。
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70612
Yi-Lian Wang, Lin-Hua Zhang, Tong-Xuan Gai, Qi-Ming Zhou, Jing Zhang, Yu Wu, Yi-Bing Wang, Guo-Yuan Shi, Yan Wen, Lin Liu, Li-Tao Luo
{"title":"Electrospinning-Graphene Promoted Low-Temperature Nitrogen Removal of Immobilized ANAMMOX Granules.","authors":"Yi-Lian Wang, Lin-Hua Zhang, Tong-Xuan Gai, Qi-Ming Zhou, Jing Zhang, Yu Wu, Yi-Bing Wang, Guo-Yuan Shi, Yan Wen, Lin Liu, Li-Tao Luo","doi":"10.1002/wer.70612","DOIUrl":"https://doi.org/10.1002/wer.70612","url":null,"abstract":"<p><p>To address the limited nitrogen removal performance of anaerobic ammonium oxidation (ANAMMOX) processes at low temperatures, this study successfully enhanced the low-temperature nitrogen removal performance of immobilized ANAMMOX granules by electrospinning (ES) and reduced graphene oxide (RGO). The lab-scale experimental results indicated that the total inorganic nitrogen (TIN) removal efficiency of novel immobilized ANAMMOX granules (M3) coated with 70-μm-thick chitosan/polyacrylonitrile electrospun membranes (CS/PAN-ES) and modified with 1.0 mg/(gVSS) RGO was significantly higher than M1 (common immobilized granules) and M2 (immobilized granules modified with 1.0 mg/(gVSS) RGO) at 4°C-13°C, especially at 4°C (60.9%-71.0%). These improvements were attributed to the stimulation of ANAMMOX activity at low temperatures by RGO and the enhanced structural stability of immobilized granules by CS/PAN-ES membranes. Furthermore, based on 16S rRNA sequencing analysis, CS/PAN-ES membranes and RGO synergistically promoted the growth of Candidatus Kuenenia (6.2% → 21.6%) and increased the abundance of functional genes nirK, hzs, and hzo at 4°C-13°C. This represents an important mechanism by which CS/PAN-ES membranes and RGO synergistically improved the extremely low-temperature activity of immobilized ANAMMOX granules. This study provides an effective strategy for the application of ANAMMOX processes in low-temperature environments.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70612"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149082220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Bioremediation of Remazol Red Dye Using Calcium Carbonate-Immobilized Fungal Strains Aspergillus niger TB1, Cladosporium cladosporioides TB31, and Trametes polyzona TB4. 碳酸钙固定化真菌菌株黑曲霉TB1、枝孢子枝孢杆菌TB31和多带曲菌TB4对雷马唑红染料的生物修复
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70618
Fitria Ayudi Ulfimaturahmah, Mohamad Yani, Hanies Ambarsari, Chandra Risdian, Muhammad Ilyas
{"title":"Bioremediation of Remazol Red Dye Using Calcium Carbonate-Immobilized Fungal Strains Aspergillus niger TB1, Cladosporium cladosporioides TB31, and Trametes polyzona TB4.","authors":"Fitria Ayudi Ulfimaturahmah, Mohamad Yani, Hanies Ambarsari, Chandra Risdian, Muhammad Ilyas","doi":"10.1002/wer.70618","DOIUrl":"https://doi.org/10.1002/wer.70618","url":null,"abstract":"<p><p>Large volumes of textile industrial effluent containing toxic synthetic dyes pose severe environmental hazards. However, the operational effectiveness of mineral-associated fungal pellets for dye removal remains insufficiently clarified. This study evaluated the decolorization performance of CaCO<sub>3</sub>-associated fungal pellets prepared from three native strains-Aspergillus niger TB1, Cladosporium cladosporioides TB31, and Trametes polyzona TB4-for the removal of Remazol Red (RR) dye (100 mg/L), while assessing biomass weight and oxidative enzyme dynamics (manganese peroxidase [MnP], lignin peroxidase [LiP], and laccase [Lac]). A completely randomized factorial design was employed across four treatments: (A) CaCO<sub>3</sub>-associated fungal pellets, (B1) free mycelial pellets, (B2) free mycelial pellets with separate CaCO<sub>3</sub> addition, and (C) abiotic control without fungi or CaCO<sub>3</sub>. Destructive sampling was conducted in triplicates (n = 3) at 2, 4, 6, 16, 20, 24, 48, 72, and 96 h. Three-way ANOVA demonstrated that the interaction among fungal strain, treatment formulation, and incubation time significantly affected decolorization. Treatment A markedly enhanced process performance over other treatments; maximum decolorization reached 98.2% at 96 h using T. polyzona TB4 under Treatment A. Furthermore, MnP activity peaked earlier than LiP and Lac, reaching maximum levels of 100 U/mL in Treatment A. These findings demonstrate that CaCO<sub>3</sub>-associated fungal pelletization substantially enhances dye decolorization efficiency, fungal biomass yield, and oxidative enzyme production.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70618"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149115473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Deciphering Groundwater Hydrogeochemical Evolution and Anthropogenic Influences in Xingtai, North China: Insights From Multivariate Analysis, Nitrate Indicators, and Health Risk Assessment. 邢台地下水水文地球化学演化及其人为影响:多变量分析、硝酸盐指标和健康风险评价的启示
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70601
Yong Zhai, Zhaorui Wang, Yuan Kong, Pinlu Yang
{"title":"Deciphering Groundwater Hydrogeochemical Evolution and Anthropogenic Influences in Xingtai, North China: Insights From Multivariate Analysis, Nitrate Indicators, and Health Risk Assessment.","authors":"Yong Zhai, Zhaorui Wang, Yuan Kong, Pinlu Yang","doi":"10.1002/wer.70601","DOIUrl":"10.1002/wer.70601","url":null,"abstract":"<p><p>Understanding natural hydrogeochemical processes and anthropogenic disturbances is essential for sustainable groundwater management. This study investigated groundwater hydrogeochemical evolution in Xingtai, North China, using hydrochemical data from three campaigns (2016: n = 61; 2022: n = 89; 2024: n = 48) via integrated approaches including Piper and Gibbs diagrams, ion ratios, chloro-alkaline indices (CAI), principal component analysis (PCA), and nitrate-based health risk assessment. Groundwater was predominantly Ca-HCO<sub>3</sub> type but shifted toward Ca-SO<sub>4</sub>, with Ca-HCO<sub>3</sub> decreasing from 83.6% to 58.3% and Ca-SO<sub>4</sub> increasing from 16.4% to 37.5%. Rock weathering dominated groundwater chemistry in every campaign, with essentially all samples plotting in the rock-weathering domain of the Gibbs diagram (100% of 2016 samples, 95.5% of 2022 samples, and 97.9% of 2024 samples). CAI analysis revealed a shift from dominantly direct ion exchange in 2016-2022 toward a more balanced regime with reverse ion exchange becoming more prominent in 2024. The proportion of samples with unacceptable non-carcinogenic risks (HQ ≥ 1) for children rose from none in 2022 to 2.1% in 2024, confined to persistent, co-located hot spots, underscoring the need for targeted nitrate management.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70601"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149076030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Convex, Real-Time Koopman Model Predictive Control of Activated-Sludge Aeration: Constraint-Aware Operation With an Explicit Energy-Nitrous-Oxide Operating Frontier. 凸,实时Koopman模型预测控制的活性污泥曝气:约束意识操作与明确的能量-氧化亚氮操作边界。
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70597
Bayram Arda Kuş
{"title":"Convex, Real-Time Koopman Model Predictive Control of Activated-Sludge Aeration: Constraint-Aware Operation With an Explicit Energy-Nitrous-Oxide Operating Frontier.","authors":"Bayram Arda Kuş","doi":"10.1002/wer.70597","DOIUrl":"https://doi.org/10.1002/wer.70597","url":null,"abstract":"<p><p>Aeration is the largest energy consumer in activated-sludge treatment and a principal control over nitrous oxide (N<sub>2</sub>O), a dominant contributor to a plant's carbon footprint, while effluent limits remain nonnegotiable. This paper develops a convex Koopman-operator model predictive controller (MPC) for that three-way trade-off. Extended dynamic mode decomposition identifies a linear predictor of the nonlinear process, N<sub>2</sub>O included; successive linear programming reduces each control step to a strictly convex quadratic program with explicit ammonia and total-nitrogen constraints, an offset-free correction and an influent forecast, solved in about 9 ms against a 15-min interval. The predictor accounts for 96.7% of output variance one step ahead and 73.4% at the 90-min horizon, against 71.9% and 39.8% for local linearization. On the single-reactor reference model the controller eliminated effluent-ammonia violation over 10 identification and noise realizations, against 7.5 and 15.4 h for fixed-dissolved-oxygen and ammonia-cascade baselines at indistinguishable aeration energy, and sweeping the emission weight traced a monotone frontier along which each per cent of N<sub>2</sub>O abatement costs about 2.4% of aeration energy. Transferred without modification to a five-tank Activated Sludge Model No. 1 cascade manipulating aeration and internal recirculation, it removed ammonia violation from 69 h to none and lowered the nitrogen-load effluent index by 38% at N<sub>2</sub>O parity. A component-wise ablation identifies the lifted predictor and the offset-free correction, not the influent preview, as the sources of compliance. Run unchanged on an independently structured evaluation plant, the compliance and energy results transferred but the emission magnitudes and the ranking of the controllers on N<sub>2</sub>O did not, which bounds what the emission results license.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70597"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149138429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
MXene-Based Sustainable Semiconducting Materials for Integrated Wastewater Treatment and Energy Recovery Applications. 基于mxene的可持续半导体材料在污水处理和能源回收中的应用。
IF 2.8 4区 环境科学与生态学
Water Environment Research Pub Date : 2026-10-01 DOI: 10.1002/wer.70624
A Madhan Kumar, Anitha Gopalan, Anju Anna Jacob, N Prabhu
{"title":"MXene-Based Sustainable Semiconducting Materials for Integrated Wastewater Treatment and Energy Recovery Applications.","authors":"A Madhan Kumar, Anitha Gopalan, Anju Anna Jacob, N Prabhu","doi":"10.1002/wer.70624","DOIUrl":"https://doi.org/10.1002/wer.70624","url":null,"abstract":"<p><p>Wastewater treatment and sustainable energy recovery are two key approaches to achieve circular water management and carbon neutral technologies. The semiconducting MXene-based materials have gained widespread attention as multifunctional platform materials because of their easily tunable electronic structures, high number of surface functional groups, and efficient charge-transfer properties. The crystal chemistry, bandgap engineering, charge transport mechanisms, and rational design of semiconducting MXenes and their heterostructures are summarized. Recent developments in wastewater treatment applications including adsorption, photocatalysis, electrocatalysis, membrane separation, and capacitive deionization are critically evaluated, as well as energy recovery technologies like hydrogen production, microbial electrochemical systems, nutrient recovery, and integrated water-energy conversion. The practical implementation is further assessed by reactor engineering, performance benchmarking, stability, sustainability, and materials discovery by artificial intelligence. Last but not least, important challenges and future research directions are presented to accelerate the development of semiconducting MXene-based technologies for efficient wastewater and energy-positive environmental systems.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"98 10","pages":"e70624"},"PeriodicalIF":2.8,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149114909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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