Desalination最新文献_第3页

High-performance antifouling photothermal membranes for enhanced membrane distillation crystallization

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-25 DOI: 10.1016/j.desal.2025.118847

Alula Selomon Embaye , Antonella Piscioneri , Sabrina Morelli , Mariano Davoli , Renata De Rose , Roviel Berhane Zegeye , Sergio Santoro , Efrem Curcio , Loredana De Bartolo

{"title":"High-performance antifouling photothermal membranes for enhanced membrane distillation crystallization","authors":"Alula Selomon Embaye , Antonella Piscioneri , Sabrina Morelli , Mariano Davoli , Renata De Rose , Roviel Berhane Zegeye , Sergio Santoro , Efrem Curcio , Loredana De Bartolo","doi":"10.1016/j.desal.2025.118847","DOIUrl":"10.1016/j.desal.2025.118847","url":null,"abstract":"<div><div>Membrane Distillation-Crystallization (MDCr) technology has the potential to address the simultaneous need for water production and raw materials recovery from aqueous hypersaline solutions. However, MDCr implementation at a large scale is hindered by energy-intensive bulk feed heating and membrane fouling. Here, we developed a photothermal self-heating membrane, prepared by spray-coating a hydrophobic polyvinylidene fluoride (PVDF) membrane with graphene oxide nanoparticles (GO), exhibiting superior sunlight-to-heat conversion efficiency and antifouling properties. Under optimal conditions (PVDF-GO5), a membrane surface temperature of 81.4°C was reached in just 2 min under 1-sun irradiation (1000 W/m<sup>2</sup>), achieving a thermal efficiency of 75%, which represents a 115% increase compared to the unmodified PVDF membrane, which had a thermal efficiency of only 35%. The membrane also exhibited an evaporation flux of 1.10 L m<sup>−2</sup> h<sup>−1</sup>, more than double that of the pristine membrane (0.51 L m<sup>−2</sup> h<sup>−1</sup>). This performance facilitated the extraction of NaCl crystals from seawater and 5 M NaCl brine: cubic crystals with a dispersion of 36% around the mean crystal size were obtained. The fouling stability of photothermal membranes was studied by evaluating the role of membrane surface free energy components in the fouling process. Interestingly, the biofilm formation was reduced up to 60% for <em>E. coli</em> and 90% for <em>S. aureus</em>, with protein fouling also significantly lowered compared to the uncoated membrane. These findings demonstrate the feasibility of GO-based nanomaterials to address both temperature polarization and fouling issues in MDCr operation, bringing it closer to large-scale implementation.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118847"},"PeriodicalIF":8.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface water reverse osmosis permeate remineralization via minerals recovery from brines: Insights from a long-term industrial pilot study

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-25 DOI: 10.1016/j.desal.2025.118845

Marc Philibert , Alexandre Poli , Assma Alioui , Antonia Filingeri , Emmanuelle Filloux , Andrea Cipollina

{"title":"Surface water reverse osmosis permeate remineralization via minerals recovery from brines: Insights from a long-term industrial pilot study","authors":"Marc Philibert , Alexandre Poli , Assma Alioui , Antonia Filingeri , Emmanuelle Filloux , Andrea Cipollina","doi":"10.1016/j.desal.2025.118845","DOIUrl":"10.1016/j.desal.2025.118845","url":null,"abstract":"<div><div>Application of Assisted-Reverse Electrodialysis (A-RED) technology following low-pressure Reverse Osmosis (LPRO) for permeate remineralization from minerals recovered from the brine was evaluated at the pilot scale. A 3.6 m<sup>3</sup>/h pilot was tested using brine and permeate streams produced from a three-stage LPRO unit applied to treated water from a surface water drinking water treatment plant. The process presented viable results with permeate mineral content increasing from 6 mg/L CaCO<sub>3</sub> up to values of 1060 mg/L CaCO<sub>3</sub> and from 26 μS/cm up to 1906 μS/cm for hardness and conductivity respectively, allowing for a small footprint industrial system applied to a fraction of the permeate flow to reach the final treated water target hardness value of 90 mg/L CaCO<sub>3</sub>. Microcontaminant breakthrough tests of 32 compounds highlighted low levels of micropollutant passage with an overall retention of 92 % while dissolved organic matter (DOM) breakthrough ranged from 12 % to 25 % with a limited impact on bacterial regrowth as measured by Assimilable Organic Carbon (AOC). Scaling up to full-scale plant highlighted a water remineralization cost of 1.56 c€/m<sup>3</sup> and a favorable carbon footprint compared to lime and calcite units. Process performance was maintained stable despite changes in influent water quality and temperature over 2000 h of runtime.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118845"},"PeriodicalIF":8.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715558","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}

引用次数: 0

Study on the separation of nitric acid and acetic acid using multi-stage electrodialysis

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-24 DOI: 10.1016/j.desal.2025.118838

Xiao Ge, Baole Li, Xiang Meng, Tiansheng He, Tianchi Li, Qi Yang, Zheng Wei, Taihong Yan, Zhongwei Yuan

{"title":"Study on the separation of nitric acid and acetic acid using multi-stage electrodialysis","authors":"Xiao Ge, Baole Li, Xiang Meng, Tiansheng He, Tianchi Li, Qi Yang, Zheng Wei, Taihong Yan, Zhongwei Yuan","doi":"10.1016/j.desal.2025.118838","DOIUrl":"10.1016/j.desal.2025.118838","url":null,"abstract":"<div><div>In recent years, acetohydroxamic acid (AHA) has gained significant attention as a novel organic salt-free reagent in the reprocessing of the spent nuclear fuel. However, the primary byproduct of the AHA in the process, acetic acid (HAC), is difficult to destroy during the heating. It tends to evaporate along with nitric acid, which can contaminate the recovered nitric acid and affect its reuse. This study utilizes a multi-stage electrodialysis process to separate nitric acid from acetic acid, exploiting differences in their ionization degrees and ion migration speeds under an external electric field. The effects of current, type of reflux solution, reflux flow rate, and the number of reflux stages on the purity and recovery of nitric acid were examined. Results indicated that under the same reflux condition, increasing the current, raising the reflux flow rate or the concentration of solution could enhance the recovery rate of nitric acid. The purity of nitric acid products could reach 99.88 % at the two-stage reflux using nitric acid as a reflux solution. And a high recovery rate on the nitric acid of 97.48 % also could achieve, which meets the criteria for nitric acid reuse in the reprocessing of the spent nuclear fuel.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118838"},"PeriodicalIF":8.3,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715562","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}

引用次数: 0

Carbon nanotube-nano-Fe3O4 composite graphene hydrogel with optimized 3D structure for high-performance solar evaporation

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-24 DOI: 10.1016/j.desal.2025.118840

Yueyue Jiang , Yu Gong , Chunwen Guo, Xu Xiang

{"title":"Carbon nanotube-nano-Fe3O4 composite graphene hydrogel with optimized 3D structure for high-performance solar evaporation","authors":"Yueyue Jiang , Yu Gong , Chunwen Guo, Xu Xiang","doi":"10.1016/j.desal.2025.118840","DOIUrl":"10.1016/j.desal.2025.118840","url":null,"abstract":"<div><div>In the face of increasingly scarce freshwater resources, harnessing sustainable solar energy for water evaporation offers an effective pathway to alleviate the water crisis. In this study, we prepared a highly efficient hydrogel solar evaporator (GHCFeP) using graphene oxide (GO), carbon nanotubes (CNTs), nano-Fe<sub>3</sub>O<sub>4</sub>, and polyvinyl alcohol (PVA) as raw materials. The combination of CNTs' excellent molecular thermal vibration effect and nano-Fe<sub>3</sub>O<sub>4</sub>'s superior light absorption and photothermal conversion mechanism endows the composite hydrogel with better photothermal conversion capabilities. Meanwhile, the introduction of PVA enhances the water transport capacity within the hydrogel. Furthermore, this work optimizes the three-dimensional (3D) structure of the hydrogel, reducing the “dead evaporation zone” on the evaporator's surface and enhancing the hydrogel's evaporation rate. Due to GHCFeP's low evaporation enthalpy (1377 kJ/kg), under 1.0 sun illumination, its evaporation rate reaches 2.133 ± 0.166 kg·m<sup>−2</sup>·h<sup>−1</sup> in pure water and 1.778 ± 0.181 kg·m<sup>−2</sup>·h<sup>−1</sup> in simulated seawater. Additionally, by shaping the evaporator into a honeycomb-like structure, the evaporation rate of GHCFeP is further improved. The honeycomb-shaped GHCFeP exhibits an evaporation rate of 2.304 ± 0.042 kg·m<sup>−2</sup>·h<sup>−1</sup> in pure water with a photothermal conversion efficiency of 92.4 %, and an evaporation rate of 2.045 ± 0.050 kg·m<sup>−2</sup>·h<sup>−1</sup> in simulated seawater. In summary, this work not only develops an efficient solar evaporator but also achieves higher photothermal conversion efficiency through optimized 3D structuring, providing new insights and strategies for related research.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118840"},"PeriodicalIF":8.3,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695948","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}

引用次数: 0

NaOH-assisted heat curing towards highly permeable, superior selective, and antifouling TFC nanofiltration membranes

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-24 DOI: 10.1016/j.desal.2025.118844

Weiwei Huang , Xiaozhen Lu , Wenzong Zhou , Weiwei Lv , Quan Yuan , Hang Yang , Xinwei Kang , Daoji Wu , Lin Wang , Xuewu Zhu

{"title":"NaOH-assisted heat curing towards highly permeable, superior selective, and antifouling TFC nanofiltration membranes","authors":"Weiwei Huang , Xiaozhen Lu , Wenzong Zhou , Weiwei Lv , Quan Yuan , Hang Yang , Xinwei Kang , Daoji Wu , Lin Wang , Xuewu Zhu","doi":"10.1016/j.desal.2025.118844","DOIUrl":"10.1016/j.desal.2025.118844","url":null,"abstract":"<div><div>Polyamide (PA) nanofiltration (NF) membranes are promising for diverse water treatment applications, particularly due to their high permeability, selectivity, and inherent antifouling properties. These NF membranes are highly sought after delivering high-quality drinking water. The development of high-performance NF membranes through interfacial polymerization (IP) requires careful optimization of heat treatment and post-treatment processes. In this study, we integrated these steps to establish an optimized heat treatment strategy utilizing post-treatment solutions. Systematic investigations revealed that the use of NaOH as a heating reagent etched the PA layer while promoting the hydrolysis of chloride groups, resulting in NF membranes with enhanced negative charge, improved hydrophilicity, and increased pore size. The optimized Post-3 demonstrated exceptional performance, with a permeability of 29.3 LMH/bar while achieving a remarkable 97.3 % removal efficiency for Na<sub>2</sub>SO<sub>4</sub>. The Post-3 exhibited excellent selectivity for both monovalent and multivalent ions, making it ideal for advanced water treatment applications. Furthermore, during natural surface water purification, the Post-3 effectively removed organic compounds while retaining moderate mineral content, ensuring the provision of safe drinking water with optimal mineral composition. The study also highlighted the outstanding fouling resistance and long-term stability of the Post-3, offering valuable insights into the customization of NF membranes for advanced drinking water treatment systems.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118844"},"PeriodicalIF":8.3,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715561","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}

引用次数: 0

Gel-based evaporators for solar desalination of high concentration brines

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-23 DOI: 10.1016/j.desal.2025.118843

Zihui Wang , Xinjuan Liu , Yuquan Li , Bowen Wang , Zhongkai Qu , Min Xu , Likun Pan

{"title":"Gel-based evaporators for solar desalination of high concentration brines","authors":"Zihui Wang , Xinjuan Liu , Yuquan Li , Bowen Wang , Zhongkai Qu , Min Xu , Likun Pan","doi":"10.1016/j.desal.2025.118843","DOIUrl":"10.1016/j.desal.2025.118843","url":null,"abstract":"<div><div>Interfacial solar evaporation has gained attention in seawater desalination and wastewater treatment due to its high efficiency, environmental sustainability, and low cost. However, salt buildup on the evaporator surface, clogging water transport channel and reduction in effective evaporation area result in decreased evaporation performance. Notably, reducing the salt accumulation of evaporators through strategies such as surface engineering, hierarchical structures, and capillary-driven designing is vital to achieving high solar-to-vapor energy conversion efficiency and optimizing long-term stability. This review explores the salt management and desalination stability of gel-based evaporators for solar desalination of high concentration brines. Improving the stability of the desalination process is suggested by refining the hierarchical structures engineering of the gel-based evaporator, modifying the surface wetting characteristics (hydrophilicity/hydrophobicity), and choosing an appropriate polyelectrolyte to efficiently regulate salt deposition on the surface. Furthermore, the review highlights opportunities and outlines key considerations for the practical application of gel-based evaporators.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118843"},"PeriodicalIF":8.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682256","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}

引用次数: 0

Targeted chemical cleaning preserves high water flux and water quality in long-term pilot-scale membrane distillation for potable water reuse

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-23 DOI: 10.1016/j.desal.2025.118839

Luke K. Presson, Michael J. Hegetschweiler, Varinia Felix, Jeb Shingler, Kerri L. Hickenbottom, Andrea Achilli

{"title":"Targeted chemical cleaning preserves high water flux and water quality in long-term pilot-scale membrane distillation for potable water reuse","authors":"Luke K. Presson, Michael J. Hegetschweiler, Varinia Felix, Jeb Shingler, Kerri L. Hickenbottom, Andrea Achilli","doi":"10.1016/j.desal.2025.118839","DOIUrl":"10.1016/j.desal.2025.118839","url":null,"abstract":"<div><div>Long-term, continuous operation of membrane distillation (MD) is limited by the lack of knowledge on scaling and wetting resistance. In this study, a pilot-scale vacuum-assisted air gap MD (V-AGMD) system with 25.92 m<sup>2</sup> of membrane area is used to purify reclaimed water from a membrane bioreactor. The V-AGMD system produced 600–700 L/day with a 75 % recovery rate of water for approximately three months. A decline in water flux from the initial value of 1.1 LMH was observed and routine chemical cleaning procedures were employed in response. Cleaning with hydrochloric acid (HCl) was effective at recovering water flux, but after one month of weekly acid cleaning, some evidence of fouling and scaling remained. Additional chemical cleaning procedures were tested, including chlorination and the use of chelating agents. Chlorination was ineffective because minimal organic fouling was present, and, without rinsing procedures, generated disinfection byproducts that were detected in the distillate. The chelating agent (Ethylenediaminetetraacetic acid, EDTA) recovered water flux by the removal of gypsum. Despite evidence of membrane scaling, the water quality of the distillate remained high. Rejection of dissolved contaminants temporarily decreased during the second month of operation but was recovered by cleaning with EDTA. The cleaning procedures were also critical in maintaining the energy efficiency of the V-AGMD system as they lowered the channel backpressure and improved the heat recovery after fouling and scaling. This study demonstrates that high water quality and water flux can be maintained in long-term MD operation through chemical cleaning that targets specific foulants and scalants.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118839"},"PeriodicalIF":8.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759695","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}

引用次数: 0

A comprehensive study on the impact of electromagnetic fields on calcium carbonate scaling in membrane distillation

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-22 DOI: 10.1016/j.desal.2025.118821

Salha Bahayan , Ahmad Almasri Alwan , Tu Phuong Pham Le , Jisha Kuttiani Ali , Gobind Das , Isam Janajreh , Mohamed I. Hassan Ali , Noora Almarzooqi , Emad Alhseinat

{"title":"A comprehensive study on the impact of electromagnetic fields on calcium carbonate scaling in membrane distillation","authors":"Salha Bahayan , Ahmad Almasri Alwan , Tu Phuong Pham Le , Jisha Kuttiani Ali , Gobind Das , Isam Janajreh , Mohamed I. Hassan Ali , Noora Almarzooqi , Emad Alhseinat","doi":"10.1016/j.desal.2025.118821","DOIUrl":"10.1016/j.desal.2025.118821","url":null,"abstract":"<div><div>Here the impact of electromagnetic field (EMF) on CaCO<sub>3</sub> scaling during membrane distillation (MD) was examined. Synthetic feed solutions with varying salinities (0 to 35,000 mg/L of NaCl concentration), different scaling potential index (SPI = 3.28 and 3.81), and natural seawater were used. Key parameters such as conductivity, Ca<sup>2+</sup> and alkalinity concentrations, permeate flux, and the amount of CaCO<sub>3</sub> formed were monitored throughout the experiments. Furthermore, the morphology of CaCO<sub>3</sub> was examined by employing a scanning electron microscope (SEM) and X-ray powder diffraction (XRD). The results demonstrated that integrating an EMF device, generating a maximum intensity of 25 mT, significantly improves permeate flux by enhancing water evaporation and reducing CaCO<sub>3</sub> surface crystallization across all the test conditions. The EMF exposure promotes bulk crystallization, accelerates of phase transformation of CaCO<sub>3</sub>, reduces of crystal size, and alters crystal structure. Notably, at high salinity (35,000 mg/L), the formation of a new phase of coprecipitation orthorhombic Nyerereite (Na<sub>2</sub>Ca(CO<sub>3</sub>)<sub>2</sub> was experimentally detected, suggesting the role of EMF on activation of ions and co-precipitation reaction. These findings demonstrate that EMF integration into MD systems is a promising and cost-effective strategy for scaling remediation, with a potential applications in industrial desalination and water treatment.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118821"},"PeriodicalIF":8.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682248","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}

引用次数: 0

Synergistic CoS2-Sn2S3 heterojunction in N-doped carbon for enhanced and selective heavy metal removal via capacitive deionization

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-20 DOI: 10.1016/j.desal.2025.118823

Yongping He , Lei Zhang , Xiaowei Li , Lina Jin , Xinhua Huang

{"title":"Synergistic CoS2-Sn2S3 heterojunction in N-doped carbon for enhanced and selective heavy metal removal via capacitive deionization","authors":"Yongping He , Lei Zhang , Xiaowei Li , Lina Jin , Xinhua Huang","doi":"10.1016/j.desal.2025.118823","DOIUrl":"10.1016/j.desal.2025.118823","url":null,"abstract":"<div><div>Metal sulfides are considered promising electrode materials for capacitive deionization (CDI) due to their high specific capacity potential. However, their practical utility is often constrained by insufficient compositional and structural design, as well as poor cycling stability resulting from volumetric expansion and contraction during prolonged CDI processes. To overcome these challenges, we developed a novel CoS<sub>2</sub>-Sn<sub>2</sub>S<sub>3</sub> nanojunction confined within a nitrogen-doped carbon matrix (CoS<sub>2</sub>-Sn<sub>2</sub>S<sub>3</sub>@NC) through solution-phase synthesis followed by sulfurization. This innovative electrode demonstrated a remarkable selective adsorption capacity of 178.5 mg/g for Mn<sup>2+</sup> in a 500 mg/L MnCl<sub>2</sub> electrolyte at 1.2 V, maintaining 95 % electro-adsorption efficiency over 21 cycles. The unique hierarchically flower-like nanosheet structure of the material increased the exposure of active sites, improved ion transport, and boosted charge storage capacity. Additionally, the carbon matrix stabilized the electrode by preventing volumetric changes, while the strong electronic coupling between CoS<sub>2</sub> and Sn<sub>2</sub>S<sub>3</sub> components facilitated interfacial charge redistribution, enhancing electron transfer and CDI kinetics. These results highlight the potential of heterojunction engineering to advance the development of highly efficient CDI electrode materials for sustainable water treatment technologies.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118823"},"PeriodicalIF":8.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682245","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}

引用次数: 0

Solar-driven continuous seawater desalination of KBC/SA based porous evaporator with excellent salt resistance and high evaporation rate

IF 8.3 1区工程技术

Desalination Pub Date : 2025-03-20 DOI: 10.1016/j.desal.2025.118828

Shengqin Dai, Xiaoying Feng, Xiaoyi Wang, Jiyan Li, Weidong Liang

{"title":"Solar-driven continuous seawater desalination of KBC/SA based porous evaporator with excellent salt resistance and high evaporation rate","authors":"Shengqin Dai, Xiaoying Feng, Xiaoyi Wang, Jiyan Li, Weidong Liang","doi":"10.1016/j.desal.2025.118828","DOIUrl":"10.1016/j.desal.2025.118828","url":null,"abstract":"<div><div>Solar thermal-driven interfacial evaporation technology holds significant promise for applications in sewage purification and desalination. However, challenges such as intermittent solar illumination and salt accumulation hinder its practical effectiveness. In this study, phase change materials (PCMs) were introduced to enhance the evaporation efficiency of evaporator under weak sunlight conditions. Specifically, stearic acid serves as a PCM, conductive carbon black (KBC) as a photothermal material, while chitosan and microcrystalline cellulose (MCC) are utilized as matrix materials. Stearic acid (SA) was encapsulated in a microgel derived from chitosan (CS) using a vacuum impregnation technique, and KBC/SA was synthesized via a bidirectional regeneration method. Experimental results reveal that the evaporation rate can reach 3.46 kg m<sup>−2</sup> h<sup>−1</sup> under a light intensity of 1 kW m<sup>−2</sup>. With the light source off, the KBC/SA evaporator still sustains an evaporation rate of 1.53 kg m<sup>−2</sup> h<sup>−1</sup>. On semi-cloudy days, the latent heat released from SA supplies substantial thermal energy, enabling continuous evaporation and increasing water production by 1.85 kg m<sup>−2</sup> h<sup>−1</sup> compared to the conventional evaporators without PCMs. In addition, the evaporation rate of the solar evaporator in 20 % salt solution can reach 2.98 kg·m<sup>−2</sup>·h<sup>−1</sup>, which is only slightly different from that in pure water solution. This study presents an effective strategy to address the intermittent use of solar energy and mitigate salt accumulation in solar-powered seawater desalination systems that employ interfacial evaporation.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"608 ","pages":"Article 118828"},"PeriodicalIF":8.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682681","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}

引用次数: 0