Desalination最新文献_第7页

Membrane-informed multi-mechanistic predictive maintenance for MBR plants: Early determination of membrane cleaning with biologically driven, physically deposited, and chemically induced fouling model MBR 设备的膜信息多机制预测性维护：利用生物驱动、物理沉积和化学诱导污垢模型及早确定膜清洁情况

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-04 DOI: 10.1016/j.desal.2024.118263

TaeYong Woo , SangYoun Kim , ChanHyeok Jeong , SungKu Heo , ChangKyoo Yoo

{"title":"Membrane-informed multi-mechanistic predictive maintenance for MBR plants: Early determination of membrane cleaning with biologically driven, physically deposited, and chemically induced fouling model","authors":"TaeYong Woo , SangYoun Kim , ChanHyeok Jeong , SungKu Heo , ChangKyoo Yoo","doi":"10.1016/j.desal.2024.118263","DOIUrl":"10.1016/j.desal.2024.118263","url":null,"abstract":"<div><div>Membrane bioreactors (MBRs) are widely employed in wastewater treatment for their superior performance, though maintaining membrane efficiency remains costly and energy-intensive because of fouling accumulation. This study introduces a novel membrane-informed predictive maintenance (membrane-PM) system that accurately predicts cleaning intervals for membrane fouling in a full-scale MBR plant. By integrating biologically informed, physically deposited, and chemically induced fouling data via an activated sludge model, resistance-in-series model, and multiple linear regression model, we captured the complex dynamics of fouling. A day-to-day calibration approach, utilizing global sensitivity analysis and a genetic algorithm (GA), improves model precision by reflecting temporal fouling changes. Additionally, membrane-informed multivariate statistical monitoring (membrane-MSM), based on Hotelling's T2 statistic, was developed to predict optimal chemical cleaning intervals, helping to prevent MBR operational failures. Results indicate that the membrane-PM system effectively estimated membrane fouling progress via transmembrane pressure (TMP) with an R<sup>2</sup> of 88.4 %, achieving high accuracy and extending membrane operational lifespan by an average of 17.5 %.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"594 ","pages":"Article 118263"},"PeriodicalIF":8.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658810","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

Nanoscale engineer: The revolutionary role of nanobubbles in the synthesis of functional nanomaterials 纳米工程师：纳米气泡在功能纳米材料合成中的革命性作用

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-04 DOI: 10.1016/j.desal.2024.118271

Yang Wu , Jiayin Zhang , Weixing Xu , Bin Li , Wei Zhang , Zhentao Wang , Haojie Xu , Junfeng Wang , Jianming Pan , Kai Yu

{"title":"Nanoscale engineer: The revolutionary role of nanobubbles in the synthesis of functional nanomaterials","authors":"Yang Wu , Jiayin Zhang , Weixing Xu , Bin Li , Wei Zhang , Zhentao Wang , Haojie Xu , Junfeng Wang , Jianming Pan , Kai Yu","doi":"10.1016/j.desal.2024.118271","DOIUrl":"10.1016/j.desal.2024.118271","url":null,"abstract":"<div><div>The study of bulk nanobubbles (NBs) has long been an interest of the scientific community. Recent studies have highlighted the revolutionary role of NBs as nanoscale engineers in the synthesis of functional nanomaterials in a sustainable, controllable and soft-template manner. In this process, the preparation and stability control of NBs is particularly critical, which directly determines the performance of the soft template and the quality and functionality of the final material. This review focuses on the key breakthroughs of NBs as green and soft templates for the fabrication of functional nanomaterials. The emerging technique, which allows for the control over the size, morphology, and properties of the nanomaterials by adjusting the characteristics of the bulk NBs templates, shows significant promise. The burgeoning preparation techniques for NBs, including physical and chemical methods, are first outlined. The application scenarios and relative merits of different NBs producing methods are compared and analyzed. Recent advances in the control of NBs stability are then discussed, considering the influence of temperature, pH, surfactant, electrolyte, and gas properties on NBs stability. Finally, the recent achievements of NBs-templated nanomaterials for the applications in uranium extraction, catalysis and desalination are emphasized, while the underlying mechanisms for material preparation and optimization are also discussed.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"594 ","pages":"Article 118271"},"PeriodicalIF":8.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658805","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

AIE-derived fluorescent silsesquioxane-based hybrid aerogel for light-enhanced gold recovery 基于硅倍半氧烷的 AIE 衍生荧光混合气凝胶用于光增强黄金回收

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-04 DOI: 10.1016/j.desal.2024.118265

Mengshuang Zhang, Hongzhi Liu

{"title":"AIE-derived fluorescent silsesquioxane-based hybrid aerogel for light-enhanced gold recovery","authors":"Mengshuang Zhang, Hongzhi Liu","doi":"10.1016/j.desal.2024.118265","DOIUrl":"10.1016/j.desal.2024.118265","url":null,"abstract":"<div><div>In this work, two aggregation-induced emission (AIE)-active organic fluorescent monomers (TPV, TPC) were synthesized by Knoevenagel reaction of 2,2′-([1,1′-biphenyl]-4,4′-diyl)diacetonitrile with benzaldehyde and 4-bromobenzaldehyde, respectively. Subsequently, two fluorescent hybrid porous polymers with semiconductor performance (PCS-TPV, PCS-TPC) were prepared successfully by connecting octavinyl silsesquioxane (OVS) with TPV and TPC through Friedel-Crafts reaction and Heck coupling, respectively. Among them, PCS-TPV with a hyper-crosslinked structure offered a specific surface area of up to 1165 m<sup>2</sup> g<sup>−1</sup>; PCS-TPC was the first AIE-derived fluorescent hybrid silsesquioxane-based semiconductor polymer with 3-D conjugated structure. Compared with PCS-TPV, PCS-TPC exhibited stronger visible light absorption, higher fluorescent performance and quantum yield due to its high AIE-active unit content. Besides, PCS-TPC exhibited a remarkable gold recovery capacity (Q<sub>m</sub> = 2728 mg g<sup>−1</sup>) when exposed to visible light irradiation. Adsorption mechanism revealed that the photoelectrons produced by PCS-TPC under visible light irradiation reduced all adsorbed Au(III) to Au(I) and Au(0). Furthermore, a hybrid aerogel was prepared through physical blending of PCS-TPC with chitosan, overcoming the limitation that insoluble powder was difficult to process and recycle. This work provided a very efficient, sustainable, and industrially feasible way for gold recovery in e-waste.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"593 ","pages":"Article 118265"},"PeriodicalIF":8.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578505","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

Green and sustainable pH-responsive adsorptive membrane using aminated-MXene mangrove filled polylactic acid ultrafiltration membrane for enhanced water permeability and microplastic removal 利用胺化-MXene 红树林填充聚乳酸超滤膜提高透水性和微塑料去除率的绿色可持续 pH 响应吸附膜

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-03 DOI: 10.1016/j.desal.2024.118268

Fatema Khamis, Hanaa M. Hegab, Shadi W. Hasan

{"title":"Green and sustainable pH-responsive adsorptive membrane using aminated-MXene mangrove filled polylactic acid ultrafiltration membrane for enhanced water permeability and microplastic removal","authors":"Fatema Khamis, Hanaa M. Hegab, Shadi W. Hasan","doi":"10.1016/j.desal.2024.118268","DOIUrl":"10.1016/j.desal.2024.118268","url":null,"abstract":"<div><div>A green and sustainable pH-responsive adsorptive membrane using aminated-MXene mangrove filled (MXAM) polylactic acid ultrafiltration membrane was developed. The material synthesis involved employing the common in-situ HF acid-based etching method with Li<sup>+</sup> intercalant, while membrane fabrication utilized the non-solvent induced phase inversion (NIPS) technique. The study tested pH-responsive adsorption and filtration using a 20 ppm synthetic polystyrene (PS) microplastic (MPs) suspension at pH 4, 7, and 10. Incorporating 1.5 wt% MXAM enhanced water permeability to 1855.6 LMHbar and achieved rejection rates of 79 %, 91.5 %, and 99.9 % for pH 4, 7, and 10, respectively. These improvements can be attributed to enhanced porosity, pore size, hydrophilicity, and surface charges. The kinetics of the adsorptive 1.5PLAMXAM membrane for PS MPs at 5 ppm and pH 7 showed psuedo-second-order kinetics (R<sup>2</sup> = 0.967) matching experimental adsorption (q<sub>e,exp</sub> = 12.4 mg.g<sup>−1</sup>), indicating chemical adsorption. The equilibrium data of 1.5PLAMXAM membrane fitting the Langmuir isotherm, showed an increase in q<sub>e,exp</sub> from 5.69 to 12.79 mg.g<sup>−1</sup> at pH 4 and 10, respectively, attributed to a higher density of pH-responsive groups. The fitted Langmuir isotherm suggested a maximum monolayer coverage of q<sub>m</sub> = 23.5 mg.g<sup>−1</sup>.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"594 ","pages":"Article 118268"},"PeriodicalIF":8.3,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593245","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

Supercapacitive behavior of two-dimensional carbon nanosheets with oxygen-induced interfacial modification 氧诱导界面修饰的二维碳纳米片的超级电容行为

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-02 DOI: 10.1016/j.desal.2024.118261

Zonglun Cao , Hailong Li , Yiyang Zhang , Yue Lian , Huaihao Zhang

{"title":"Supercapacitive behavior of two-dimensional carbon nanosheets with oxygen-induced interfacial modification","authors":"Zonglun Cao , Hailong Li , Yiyang Zhang , Yue Lian , Huaihao Zhang","doi":"10.1016/j.desal.2024.118261","DOIUrl":"10.1016/j.desal.2024.118261","url":null,"abstract":"<div><div>Biomass-derived carbon typically contains abundant heteroatomic defects and interfacial functional groups, which can contribute to additional pseudocapacitance. However, the type of interfacial functional groups in biomass-derived carbon is uncontrollable and variable, reducing their homogeneity. In this work, recyclable boric acid was employed as an activator to convert bioaerogels into carbon nanosheets. Subsequently, low-temperature air oxidation was utilized to modulate their thickness and microstructure. Notably, the multiple and uncontrollable functional groups at the carbon interface were uniformly transformed into oxygen-containing functional groups under oxygen induction, resulting in 2D carbon nanosheet materials with enhanced stability properties. Meanwhile, the introduction of more oxygen-containing functional groups, such as carbonyl (C=O) and carboxyl (-COOH) groups, improves material wettability and capacitive properties. In addition, the boron and nitrogen elements doping introduced by activators and precursors enhances its pseudocapacitive properties and electrical conductivity from the carbon lattice perspective. Moreover, the rich electron/deficient effect of B<img>N valence bond can effectively boost their conductivity and rate performance. In fact, the materials present good capacitive properties (high specific capacitance of 298.5 F g<sup>−1</sup> in KOH three-electrode system) and CDI (capacitive deionization) performance (good desalting capacity of 35.2 mg g<sup>−1</sup> in CDI system).</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"593 ","pages":"Article 118261"},"PeriodicalIF":8.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578504","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

Ladder electrodialysis: Efficient up-concentration of lithium ion and its mechanisms behind 阶梯电渗析：锂离子的高效浓缩及其背后的机制

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-02 DOI: 10.1016/j.desal.2024.118270

Cong Liu , Siyang Gu , Wenjing Gao , Ming Tan , Yong Lin , Min Hu , Yuebiao Li , Yang Zhang

{"title":"Ladder electrodialysis: Efficient up-concentration of lithium ion and its mechanisms behind","authors":"Cong Liu , Siyang Gu , Wenjing Gao , Ming Tan , Yong Lin , Min Hu , Yuebiao Li , Yang Zhang","doi":"10.1016/j.desal.2024.118270","DOIUrl":"10.1016/j.desal.2024.118270","url":null,"abstract":"<div><div>The development of lithium extraction technology from salt lakes has seen significant demand in recent years, driven by the surge in energy storage needs for lithium-ion batteries used in electric vehicles and renewable power plants. Currently, evaporation technologies such as Mechanical Vapor Recompression (MVR) and Multi-Effect Distillation (MED) are commonly employed to concentrate lithium chloride for subsequent lithium carbonate precipitation. However, these evaporation methods limit lithium yield and increase capital and operational costs, particularly in high latitude areas. Pressure-driven membrane processes like reverse osmosis are hindered by concentration polarization and cannot significantly increase lithium chloride concentration. This study proposes a new membrane stack configuration with a laddered compartment design, termed Ladder Electrodialysis (LED), which addresses the concentration polarization issue and achieves a lithium salt (LiCl) concentration of 16.39 % (196 g·L<sup>−1</sup>). Economic analysis shows that the energy consumption is only 0.42 kWh per kilogram of LiCl. Ladder electrodialysis is a novel salt concentration technology, with applications in brine valorization or disposal.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"594 ","pages":"Article 118270"},"PeriodicalIF":8.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658850","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

Tailoring high-performance polyesteramide NF membranes for purifying natural surface water: Enhanced minerals preservation, chlorine resistance, and mechanisms 定制用于净化天然地表水的高性能聚酯酰胺无负压膜：强化矿物质保存、耐氯性和机制

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-02 DOI: 10.1016/j.desal.2024.118267

Xuewu Zhu , Feiyue Ge , Xinwei Kang , Liping Qiu , Bin Liu , Jingtao Xu , Feihong Wang , Daoji Wu , Zhe Yang , Daliang Xu , Heng Liang

{"title":"Tailoring high-performance polyesteramide NF membranes for purifying natural surface water: Enhanced minerals preservation, chlorine resistance, and mechanisms","authors":"Xuewu Zhu , Feiyue Ge , Xinwei Kang , Liping Qiu , Bin Liu , Jingtao Xu , Feihong Wang , Daoji Wu , Zhe Yang , Daliang Xu , Heng Liang","doi":"10.1016/j.desal.2024.118267","DOIUrl":"10.1016/j.desal.2024.118267","url":null,"abstract":"<div><div>Nanofiltration membranes (NF) possessing high flux, excellent selectivity, and chlorine resistance are urgently required for healthy drinking water treatment. In this work, we prepared a high-performance polyesteramide (PEA) nanofiltration membrane featuring polyester and polyamide composite structures using piperazine (PIP) and polyvinyl alcohol (PVA) as <em>co</em>-monomers via sodium hydroxide catalyzing interfacial polymerization. The resultant NF membranes' surface morphology, chemical structure, filtration performance, and chlorine stability were systematically evaluated. The optimized PEA membrane (PEA-TFC) possessed a terraced morphology and relatively high roughness (23.9 nm). During purifying real surface water, a high flux (20.29 LMH bar<sup>−1</sup>) with <50 % mineral rejection and over 70 % organic matter removal was achieved for PEA-TFC, demonstrating excellent organic/mineral selectivity. In addition, the polyamide and polyester structures provided uniform pore size distribution and fewer chlorine-active sites, granting PEA-TFC excellent chlorine resistance and stability. The exceptional organic/mineral selective separations and remarkable chlorine resistance endow the PEA-TFC as a promising candidate for healthy drinking water NF.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"593 ","pages":"Article 118267"},"PeriodicalIF":8.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578503","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

Enhanced electricity generation and energy storage in a microbial fuel cell with a bimetallic-modified capacitive anode 采用双金属改性电容阳极的微生物燃料电池可增强发电和储能能力

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-01 DOI: 10.1016/j.desal.2024.118247

Yuyang Wang , Su Ma , Lida Hou , Jinlong Zuo , Xiangquan Kong , Yu Song , Zhijie Wang , Ye Tian , Jing Dong

{"title":"Enhanced electricity generation and energy storage in a microbial fuel cell with a bimetallic-modified capacitive anode","authors":"Yuyang Wang , Su Ma , Lida Hou , Jinlong Zuo , Xiangquan Kong , Yu Song , Zhijie Wang , Ye Tian , Jing Dong","doi":"10.1016/j.desal.2024.118247","DOIUrl":"10.1016/j.desal.2024.118247","url":null,"abstract":"<div><div>Microbial fuel cells (MFCs) are energy conversion devices that utilize microorganisms attached to the electrode as catalysts for the oxidation of organic waste, thereby generating electricity. In this study, a two-step hydrothermal method was employed to prepare a CF/NiO/Fe<sub>3</sub>O<sub>4</sub> capacitive composite anode by directly growing NiO on a carbon felt substrate as a metal framework to support the in-situ growth of Fe<sub>3</sub>O<sub>4</sub>. In this paper, electrochemical tests such as cyclic voltammetry and AC impedance were used to investigate the electrochemical performance of the modified anode. The two electrodes were characterized by SEM, EDS, XRD, FTIR, BET, TEM and SAED test. The MFCs with the CF/NiO/Fe<sub>3</sub>O<sub>4</sub> anode exhibited significant improvements in generation of power and storage of energy performance, reaching a maximum power density of 9.29 W/m<sup>3</sup>, which has increased by 1.54-fold compared to CF/NiO anode. After charging/discharging for 60 min, the CF/NiO/Fe<sub>3</sub>O<sub>4</sub> anode had a sum charge of 8532.07C /m<sup>2</sup>, which was a significant increase of 1868.82C/m<sup>2</sup> compared to the CF/NiO anode. High-throughput sequencing analysis suggested that the proportion of electricity-generating microorganisms on the CF/NiO/Fe<sub>3</sub>O<sub>4</sub> surface of the anode reached 86.03 %, which was higher than that on CF/NiO anode surface. The protein contents of the CF/NiO/Fe<sub>3</sub>O<sub>4</sub> reached 71.03 mg/cm<sup>3</sup>. The application of capacitive materials in MFCs would allow the constructed MFCs to generate and store bioelectricity simultaneously.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"593 ","pages":"Article 118247"},"PeriodicalIF":8.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573033","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

Capacitive deionization exploiting La-based LDH composite electrode toward energy efficient and selective removal of phosphate 利用 La 基 LDH 复合电极的电容式去离子技术，实现高效节能和选择性去除磷酸盐

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-01 DOI: 10.1016/j.desal.2024.118259

Chunming Feng , Xiaobing Pan , Xiaocheng Lin , Yi Yang , Fuqiang Fan , Chenxiao Jiang , Ying Mei

{"title":"Capacitive deionization exploiting La-based LDH composite electrode toward energy efficient and selective removal of phosphate","authors":"Chunming Feng , Xiaobing Pan , Xiaocheng Lin , Yi Yang , Fuqiang Fan , Chenxiao Jiang , Ying Mei","doi":"10.1016/j.desal.2024.118259","DOIUrl":"10.1016/j.desal.2024.118259","url":null,"abstract":"<div><div>Capacitive deionization (CDI) is a promising technology for removing phosphate from wastewater. Its practical implementation is however hindered by the constraints on the electrode materials. To boost the adsorption capacity, phosphate selectivity, and cost-effectiveness of the electrode, this study proposed a composite electrode blending Lanthanum-based layered double hydroxide (Ca-La LDH) and activated carbon (AC). It capitalizes on the synergistic effects of electric double layer capacitance (EDLC) of AC and the diffusion-controlled charge storage (pseudocapacitive behavior) of Ca-La LDH. By optimizing the mass ratios of the constituents and the electrode material loading capacities, the composite electrode AC/Ca-La LDH-50<sub>20</sub> was developed, which contains 20 mg of 50 wt% Ca-La LDH. This composition achieved a remarkable phosphate adsorption capacity of 34.8 mg P /g and a low energy consumption of 0.0051 kWh/g P in constant voltage (CV) mode. It represented a 241 % increase in adsorption capacity (mg P/g) and 71 % decrease in specific energy consumption (kWh/g P) compared to the electrode made solely of AC. Particularly the moderate inclusion of Lanthanum contributes to its cost-effectiveness. Moreover, further studies extensively examined the impacts of electrical driving force, including applied voltage in constant voltage (CV) mode and applied current in constant current (CC) mode, on the phosphate removal efficiency. The composite electrode remained stable performance with the presence of the high content of coexisting anions (e.g.，Cl<sup>−</sup>，SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup>, NO<sub>3</sub><sup>−</sup>), obtaining high selectivity coefficient of phosphate over other anions. This study highlighted the practical potential of AC/Ca-La LDH composite electrode for advancing CDI technology for phosphate removal in an efficient, energy-saving and cost-effective manner.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"594 ","pages":"Article 118259"},"PeriodicalIF":8.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658729","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

Structure-function relationship for functional films with constructed graded channels in dye/salt separation and fouling resistance 在染料/盐分离和防污方面具有构造分级通道的功能薄膜的结构-功能关系

IF 8.3 1区工程技术

Desalination Pub Date : 2024-11-01 DOI: 10.1016/j.desal.2024.118262

Tianmeng Zhang , Weiwei Zhang , Xiaoyan Yang , Han Zuilhof , Hao Lu

{"title":"Structure-function relationship for functional films with constructed graded channels in dye/salt separation and fouling resistance","authors":"Tianmeng Zhang , Weiwei Zhang , Xiaoyan Yang , Han Zuilhof , Hao Lu","doi":"10.1016/j.desal.2024.118262","DOIUrl":"10.1016/j.desal.2024.118262","url":null,"abstract":"<div><div>The structural assembly of polypyrrole particle stacking, combined with polydopamine space-filling, forms composite film with a network of interconnected fluid channels. The composite films achieve high water flus, separation efficiency and ratio of organic dyes/inorganic salts (flux: >600 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>; dye rejection: ~100 %; salt rejection: <5 %). Simulation using different dye fouling models show that the dye only interacts at the surface, and hardly affects internal pores of the film throughout the filtration process. Owing to the patterned surface structure as constructed by microsphere arrangement and inter-structure adaptation assembly, the functional film has excellent contamination tolerance and rinsing regeneration for macromolecular pollutants. The results of computational fluid dynamics simulations further indicate that the high shear stress above the microspheres with vortex flow in the interstitial space has a positive effect on reducing contaminant deposition. In addition to the separation property, the composite film shows good structural stability and mechanical strength in various complex water environments, benefiting their future practical applications. This work unveils the structure-function relationship for composite function films with constructed graded channels in dye/salt separation, which is important for the design and future application of these functional films.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"593 ","pages":"Article 118262"},"PeriodicalIF":8.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572877","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