Desalination最新文献

{"title":"Surface charge and pore size regulation for nanofiltration membrane enables enhanced Co/Li separation performance","authors":"Rui Gao ,&nbsp;Hui Shi ,&nbsp;Zhiwei Qiu ,&nbsp;Ruobin Dai ,&nbsp;Xubiao Luo ,&nbsp;Zhiwei Wang","doi":"10.1016/j.desal.2026.119920","DOIUrl":"10.1016/j.desal.2026.119920","url":null,"abstract":"<div><div>With the rapid retirement of lithium-ion batteries (LIBs), efficiently and environmentally friendly recovering Co²⁺ and Li⁺ from LIBs acidic leachates is crucial for meeting the demand for strategic metals. Nanofiltration (NF) membranes, featuring the potential of selective separation of ions, has shown remarkable promise in LIBs acidic leachate recycling. In this work, PDA@PEI surface deposition was employed to endow commercial NF membranes with surface charge and pore size regulation. The modified membrane exhibited a Co²⁺/Li⁺ separation factor (SF) of 70.8 in LIBs acidic leachates—far exceeding the intrinsic performance of conventional negatively charged NF membranes (SF = 11.5). DSPM-DE modeling demonstrated that membrane modification intensifies Donnan exclusion by enriching surface positive charge, while simultaneous pore-size reduction reinforces steric screening, synergistically enhancing Co²⁺/Li⁺ selectivity. Notably, the modified membrane achieved permeate quality comparable to that of a conventional two-stage NF process under single-stage operation and reduced energy consumption by 13% at a low operating pressure of 10 bar. Collectively, these findings demonstrate the feasibility of efficient Co²⁺/Li⁺ separation from spent LIBs leachates and highlight its potential to enhance both the resource-recovery efficiency and environmental sustainability of lithium-ion battery recycling.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119920"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic high-flux desalination via multistage photothermal-electric coupling","authors":"Ruduan Yuan ,&nbsp;Jiacheng Wang ,&nbsp;Yuting He ,&nbsp;Yang Geng ,&nbsp;Jinshuai Wang ,&nbsp;Meng Xia ,&nbsp;Kaixin Wang ,&nbsp;Jiaxin Luo ,&nbsp;Zhaoyu Chen ,&nbsp;Qinglin Zhang ,&nbsp;Jingxuan Lin ,&nbsp;Yuxi Yang ,&nbsp;Juanxiu Xiao ,&nbsp;Yujie Zheng ,&nbsp;Chin Foo Goh ,&nbsp;Meng Li","doi":"10.1016/j.desal.2026.119878","DOIUrl":"10.1016/j.desal.2026.119878","url":null,"abstract":"<div><div>Freshwater scarcity and the environmental impact of fossil-fuel–driven desalination have driven the need for low-energy, sustainable seawater treatment technologies. Both inverted solar evaporation (ISE) and capacitive deionization (CDI) technologies show promising application prospects in seawater desalination. However, the inherent limitations restrict freshwater production. Herein, we present a multistage high-flux photothermal-electric coupled desalinator (HPED) integrating ISE and CDI, enabling simultaneous high water-production and high-efficiency desalination. The synergistic effect of thermal and electric fields mitigates the limitations of both technologies. Specifically, the introduction of the electric field reduces the evaporation enthalpy of seawater in the ISE and inhibits the generation of salt crystals, while the thermal field accelerates the ion transport and improves the desalination rate. As a result, the five-stage HPED achieves a distillation yield of 3.25 kg m⁻² h⁻¹ (distilled water yield: 15.24 kg m⁻² day⁻¹) and a high desalination capacity of 2.05 g m-2 (capacitive deionized water yield: 78.65 kg m⁻² day⁻¹) under one sun illumination (1000 W m⁻²). Therefore, the proposed HPED system efficiently produces fresh water for domestic use and irrigation, providing a sustainable approach to simultaneously addressing the interconnected challenges of energy security, water security and food production.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119878"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemically highly selective removal of lead ions from multicomponent water via synergy from covalent organic framework and hollow mesoporous carbon sphere","authors":"Shengyu Wu ,&nbsp;Wenle Xing ,&nbsp;Kunyue Luo ,&nbsp;Yong Long ,&nbsp;Jiao Yi ,&nbsp;Xinnian Wang ,&nbsp;Wangwang Tang","doi":"10.1016/j.desal.2026.119879","DOIUrl":"10.1016/j.desal.2026.119879","url":null,"abstract":"<div><div>Lead ions (Pb²⁺) in water pose significant threats to human health and ecological safety. However, diverse metal ions may coexist, and the highly efficient and selective removal of Pb²⁺ from water is a great challenge. This study innovatively proposed an asymmetric electrochemical separation technique with redox-active mesoporous carbon hollow sphere@covalent organic framework (MCHS@COF) composite as the cathode to selectively remove Pb²⁺ from complex water matrix. Specifically, COFs featuring a conjugated aromatic framework and bearing abundant nitrogen and oxygen heteroatoms were grown in-situ hydrothermally on the MCHS. This configuration allowed rapid ion transport kinetics, inhibited COF aggregation, exposed abundant active sites for Pb²⁺ capture, and enhanced electrode conductivity and stability through the synergistic effects of electrostatic interaction and coordination interaction. Results revealed that, after 120-min treatment at 1.2 V, hybridization of MCHS and COF in an appropriate ratio (e.g., MCHS@COF-1) achieved a high Pb²⁺ removal efficiency of 96%, a remarkable Pb²⁺/Na⁺ selectivity of 8.7 and a low effluent Pb²⁺ concentration of 0.4 mg L⁻¹ when treating a mixed solution of 10 mg L⁻¹ Pb²⁺ and 100 mg L⁻¹ Na⁺. Furthermore, it demonstrated exceptional electrode regeneration and cycling stability, and exhibited a high Pb²⁺ removal selectivity versus other common metal ions (K⁺, Ca²⁺, Mg²⁺, Ni²⁺, Fe³⁺, Cd²⁺, etc.). Experimental investigation and theoretical calculation revealed the mechanism and provided a fundamental understanding of the preferential capture and selectivity of the developed electrode for Pb²⁺. This study boosts the technological advancement in the field of selective removal of heavy metals from multicomponent wastewater.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119879"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ni,Co-PBA enveloped hollow carbon tube for high performance capacitive deionization","authors":"Fanghui Pan ,&nbsp;Chenfei Yao ,&nbsp;Tong Wu ,&nbsp;Boshuang Zhang ,&nbsp;Junsheng Wu ,&nbsp;Jie Ma ,&nbsp;Jianyun Liu","doi":"10.1016/j.desal.2026.119872","DOIUrl":"10.1016/j.desal.2026.119872","url":null,"abstract":"<div><div>The development of high-performance electrodes is crucial for advancing capacitive deionization (CDI), a promising technology for energy-efficient water desalination. Among them, Prussian blue analogues (PBAs) with an open framework and high theoretical capacity have shown significant potential as Faradaic electrodes. However, their practical application is limited by poor electron transport and particle aggregation. Herein, we developed an in-situ co-precipitation strategy under acid regulation, where the controlled acidic environment modulates metal ion release and suppresses rapid crystallization, enabling the uniform deposition of small-sized Ni/Co-PBA nanoparticles onto a conductive hollow carbon tube (HCT) support, derived from the Co/Ni salt-melamine co-pyrolysis. The resulting Ni/Co-PBA/HCT composite exhibits significantly enhanced electron transfer kinetics and increased electroactive sites, achieving a high specific capacitance of 344.68 F g⁻¹ at 1 A g⁻¹. When employed as a CDI electrode, it delivers a superior salt adsorption capacity of 73.48 mg g⁻¹ and a remarkable desalination rate of 3.67 mg g⁻¹ min⁻¹ in 1000 mg L⁻¹ NaCl solution at 1.2 V. This study demonstrates the crucial role of transition metal selection in PBA-based electrodes and provides new insights into the rational design of dual-metal materials for efficient water desalination.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119872"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient salt recovery from aqueous streams using multistage liquid-liquid extraction with thermo-responsive polymers","authors":"Gabriela Pulido ,&nbsp;Daniël Feddes ,&nbsp;Gerrald Bargeman ,&nbsp;Boelo Schuur","doi":"10.1016/j.desal.2026.119886","DOIUrl":"10.1016/j.desal.2026.119886","url":null,"abstract":"<div><div>Liquid-liquid extraction (LLX) using thermo-responsive polymers is a promising low-energy alternative for concentrating hypersaline brines from reverse osmosis (RO). This study presents a comprehensive evaluation of a multistage crosscurrent LLX process, comparing poly(propylene glycol) 400 (PPG 400) and the nonionic surfactant Dehypon® LS54. The methodology includes determining liquid-liquid equilibrium (LLE) data, a theoretical graphical multistage countercurrent LLX analysis, four-stage crosscurrent batch experiments, solvent regeneration, and product purification via thermally induced phase separation (TIPS). LLE results revealed that PPG 400 possesses higher water over salt selectivity. Using ternary diagrams from LLE results, it was found that PPG 400 and Dehypon® LS54 require four and five theoretical stages, respectively, to increase the NaCl concentration from 7 to 20 wt%. In comparative four-stage crosscurrent experiments, PPG 400 achieved a higher final raffinate NaCl concentration (17.8 wt%) than Dehypon® LS54 (13.8 wt%). Using TIPS, for both polymers high recovery (&gt;99.5%) was achieved at 80 wt% to 97 wt% polymer purity. TIPS was also proven to be an effective separation for the raffinate streams, reducing polymer contamination to as low as 0.3 wt% for PPG 400 and 0.04 wt% for Dehypon® LS54. The co-extracted salt in the extract yielded a secondary brine stream (1.3 wt% to 10.4 wt% NaCl) rather than clean water, showing that more sophisticated processing and/or downstream purification is necessary to obtain high quality potable water. This work elucidates the fundamental trade-offs between thermodynamic selectivity, solvent loss, and product purity that govern the design of LLX systems for brine concentration and valorization.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119886"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic photo-assisted AOPs using acid-modified biochar: Enhanced micropollutant levofloxacin degradation in industrial wastewater","authors":"Muhammad Irtaza Sajjad Haider ,&nbsp;Guijian Liu ,&nbsp;Balal Yousaf ,&nbsp;Muhammad Arif ,&nbsp;Kiran Aziz ,&nbsp;Bisma Sattar ,&nbsp;Muhammad Zeeshan Gulzar ,&nbsp;Hameer Chand ,&nbsp;Ruijia Liu","doi":"10.1016/j.desal.2026.119900","DOIUrl":"10.1016/j.desal.2026.119900","url":null,"abstract":"<div><div>The persistence of micropollutants in aquatic environments poses serious risks to ecosystems and public health. Levofloxacin (LVFX), a widely used fluoroquinolone antibiotic, is frequently detected in industrial wastewater and resists removal by conventional treatment methods. In this study, a photo-assisted advanced oxidation process (AOPs) was developed using acid-modified bamboo biochar for efficient removal of LVFX. Here, we modified bamboo biochar with various acids (H₃PO₄, H₂SO₄, HCl, and HNO₃) to improve LVFX removal from industrial effluents. Effects of critical parameters, including pH, contact time, temperature, adsorbent dosage, co-existing ions, and LVFX concentrations, were systematically evaluated. The results revealed that H₂SO₄-ABC material exhibited the highest removal rate of LVFX (100%) at an initial concentration of LVFX 5 mg/L within 360 min. Notably, photodegradation further enhanced removal efficiency (100%) within 120 min, indicating strong photocatalytic activity of material. Under visible light irradiation, H₂SO₄-ABC facilitates efficient degradation of LVFX through a synergistic mechanism involving photocatalytically generated reactive oxygen species (ROS) and secondary adsorption of persistent intermediates. Kinetic modeling indicated that the removal process conformed to Elovich model (R² = 0.9833), whereas equilibrium data aligned with Sips isotherm (R² = 0.9927), indicating hybrid mechanisms involving both physisorption and chemisorption. Physicochemical characterization revealed that H₂SO₄-ABC material has increased surface area, pore volume, and oxygen-functional groups. Thermodynamic analysis indicated that adsorption process was spontaneous and endothermic. Achieved a low removal cost of $0.74 per gram of LVFX and retained over 85% efficiency after five reuse cycles, confirming its sustainability and scalability for pharmaceutical wastewater treatment.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119900"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thin film nanocomposite membrane incorporated with sulfonic acid-based HOFs for efficient reverse osmosis desalination","authors":"Yu-ting Liu ,&nbsp;Zi-yue Tang ,&nbsp;Zi-ao Zong ,&nbsp;Wan-zhen Wang ,&nbsp;Xiao-yin Zhang ,&nbsp;Xin-ping Song ,&nbsp;Xiang-min Meng ,&nbsp;Rijia Lin ,&nbsp;Jingwei Hou","doi":"10.1016/j.desal.2026.119876","DOIUrl":"10.1016/j.desal.2026.119876","url":null,"abstract":"<div><div>Hydrogen-bonded organic frameworks (HOFs) have emerged as promising porous materials for membrane fabrication. In this study, HOF-GS-10, synthesized from the dual ligands 1,5-naphthalenedisulfonic acid (providing sulfonic acid groups, <img>SO₃H) and guanidine hydrochloride (providing guanidinium cations, <img>C(NH₂)<span><math><msubsup><mrow></mrow><mn>3</mn><mo>+</mo></msubsup></math></span>), was selected as a nanofiller to prepare high-performance thin-film nanocomposite (TFN) membranes for reverse osmosis (RO) desalination. The HOF-GS-10 nanoparticles were uniformly incorporated into the polyamide (PA) active separation layer on a polysulfone (PSF) substrate via interfacial polymerization. Benefiting from the synergistic effects of the ultrathin PA layer, the porous structure of HOF-GS-10, and the strong hydrophilicity of the sulfonic acid groups, the resulting TFN membrane exhibited an average water permeability of 74.6 L·m⁻²·h⁻¹·MPa⁻¹, which is 260% of that the pristine thin-film composite (TFC) membrane that of the pristine thin-film composite (TFC) membrane, while maintaining a high NaCl rejection rate of 99.3%. Moreover, the HOF-modified TFN membrane demonstrated high desalination performance using natural seawater, achieving an average water permeability of 16.7 L·m⁻²·h⁻¹·MPa⁻¹. In addition, the membrane showed excellent antifouling performance against 500 ppm humic acid (HA), with a water flux recovery rate of 95.2%, and exhibited stable operation over 48 h. Molecular dynamics (MD) simulations revealed that the incorporation of hydrophilic HOF-GS-10 into the PA layer enhances water permeability by increasing the number of hydrogen-bonding sites available for water transport. This study not only proposes a novel strategy for developing high-performance RO membranes but also opens a new avenue for the application of HOF nanomaterials in advanced water treatment applications.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119876"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic material-device design for high-flux and salt-resistant solar desalination","authors":"Lian Zuo ,&nbsp;Zhenghe Wang ,&nbsp;Tongzhou Xu ,&nbsp;Xiaotian Xue ,&nbsp;Xuecheng Dong ,&nbsp;Jianqiao Zhao ,&nbsp;Meng She ,&nbsp;Pengfei Jia ,&nbsp;Weipeng Wang ,&nbsp;Zhengjun Zhang","doi":"10.1016/j.desal.2026.119881","DOIUrl":"10.1016/j.desal.2026.119881","url":null,"abstract":"<div><div>A synergistic agarose/diatomite/carbon-nanotube (ADC) material-device design enables interfacial solar steam generation (ISSG) to overcome inherent limitations of low solar flux and severe salt accumulation. While ISSG constitutes an excellent approach towards decentralized desalination, its implementation faces practical challenges due to inherent flux limits and severe salt accumulation under high salinity. In this work, we report a synergistically designed solar evaporation system that integrates a multifunctional agarose/diatomite/carbon-nanotube (ADC) hydrogel evaporator with a Fresnel lens concentrator. The ADC hydrogel, featuring an interconnected micro–nano porous network, accelerates water transport and increases the fraction of intermediate water, thereby reducing the evaporation enthalpy to 1884 J·g⁻¹. It can achieve evaporation rates up to 8.7 kg m⁻² h⁻¹ when highly concentrated radiation with 10 kW m⁻² is received, far outperforming the one-sun limitation. Importantly, it utilizes the temperature distribution field induced by focused illumination, which enables the continuous entrainment of salt ions from hot central region to its peripheral region by means of Marangoni convection during long-term feeding, hence maintaining its durability until operated stably even with a solution of 20 wt% brine. This manuscript details a material–device co-design paradigm which breaks the solar flux bottleneck and surmounts the problem of salt scaling, providing a platform for realizing efficient solar-driven water purification in practice.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119881"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robust design framework for high efficiency lithium extraction via flow-through electrosorption in complex water systems","authors":"Yong-Uk Shin ,&nbsp;Junho Cho ,&nbsp;Minjeong Kim ,&nbsp;Changha Lee ,&nbsp;Hocheol Song","doi":"10.1016/j.desal.2026.119893","DOIUrl":"10.1016/j.desal.2026.119893","url":null,"abstract":"<div><div>Addressing the growing global demand for lithium, this study introduces a next-generation flow-through electrosorption system designed for the selectively recovering lithium ions from seawater and various brine sources. Specifically, we designed and comparatively evaluated three types of cathode electrocatalysts, Lanthanum@Ti₄O₇@Titanium Carbide (TiC), Ti₄O₇@TiC, and TiC, each engineered to enhance lithium selectivity in the presence of competing ions such as Na⁺, K⁺, and Mg²⁺. The results demonstrated that the system comprising carbon cloth as the anode and La@Ti₄O₇@TiC as the cathode achieved the highest lithium recovery rate, demonstrating outstanding selectivity and adsorption performance. Under an optimized charging/discharging voltage of 1.3/−1.3 V, the La@Ti₄O₇@TiC cathode achieved a lithium recovery capacity of 29.85 μmol g⁻¹ with low specific energy consumption, while exhibiting high selectivity with Li/Na, Li/K, and Li/Mg ratios of approximately 3.5, 4.5, and 4.4, respectively. The underlying lithium-selective adsorption mechanism was systematically elucidated through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), as well as density functional theory (DFT) calculations for each electrocatalyst. In addition, the system's operational stability and electrode durability were validated through multiple charge/discharge cycling tests. This study provides the first demonstration of lithium recovery via a flow-through electrosorption system, in which a lanthanum-modified Magnéli phase Ti₄O₇@TiC cathode achieves superior lithium selectivity by synergistically regulating electronic structure and ion transport. These findings provide important foundational insights for the strategic design of electrocatalysts and the process optimization of electrosorption-based separation systems for resource recovery.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119893"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Closed-loop hybrid membrane system toward low-carbon resource recovery: Case study for food industry wastewater","authors":"Yuanyuan Yu ,&nbsp;Qingxiang Guo ,&nbsp;Wenjie Hao ,&nbsp;Buhui Zhou ,&nbsp;Minyuan Han ,&nbsp;Haoquan Zhang ,&nbsp;Jingmei Yao ,&nbsp;Le Han","doi":"10.1016/j.desal.2026.119915","DOIUrl":"10.1016/j.desal.2026.119915","url":null,"abstract":"<div><div>The rapid growth of the food-processing industry has resulted in the discharge of large volumes of high-acidity, high-ammonia organic wastewater, whose complex composition and heavy pollutant load make traditional chemical-biological treatments energy-intensive and inefficient in resource recovery. To promote low-carbon and resource-oriented utilization of food-industry wastewater, this study proposes and develops an integrated multi-membrane coupled system combining diffusion dialysis (DD), electrodialysis (ED), and reverse osmosis (RO) for the multi-target separation and cyclic recovery of acids, ammonium salts, and water. Using citrus pectin wastewater as a representative example of high-acid, high-ammonia effluent, the system performance was evaluated under real and complex wastewater conditions. In the ED stage, the enrichment factors of H⁺ and NH₄⁺ exceeded 8.0 and 3.6, respectively. The concentrated ammonium solution contained more than 5.00% nitrogen, meeting the requirement for liquid fertilizer production. The unit treatment cost was only 3.53 $/m³, representing a 69.85% reduction compared with conventional chemical-biological processes, while the carbon emission decreased by 1.01 kg CO₂/m³ (a reduction of 18.30%). Resource recovery offset 64.52% of the operational cost and effectively reduced energy-related carbon emissions. Overall, the DD-ED-RO multi-membrane coupled system achieved efficient and closed-loop recovery of acids, salts, and water from high-acidity, high‑nitrogen food-industry wastewater, combining high recovery efficiency, low carbon footprint, and strong engineering feasibility. This study provides a feasible technological pathway for the resource recovery of food-industry and other high-salinity wastewaters, demonstrating the potential of membrane technologies to enable low-carbon transformation and circular resource utilization in industrial wastewater management.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"624 ","pages":"Article 119915"},"PeriodicalIF":9.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}