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Chinese Journal of Chemical Engineering 2023年第7期59卷 42-50页

作者： Yong Xu Qingbai Chen Yang Gao Jianyou Wang Huiqing Fan Fei Zhao Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution College of Environmental Science and EngineeringNankai UniversityTianjin 300350China College of Chemical Engineering and Material Quanzhou Normal UniversityQuanzhou 362000China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Although selective nanofiltration(SNF)and selective electrodialysis(SED)have been widely adopted in the field of Mg^(2+)/Li^(+)separation,their differences have not been illustrated *** this study,for the first time,SNF and SED processes in continuous mode were studied for Li+fractionation from the same brine with high Mg/Li ratios and their differences were discussed in *** a fair analysis of the two processes,typical factors were ***,the optimal operating pressure and feed flow rate for SNF were 2.4 MPa and 140 L·h^(-1),respectively,while the optimal cell-pair voltage and replenishment flow rate for SED were 1.0 V and 14 L·h^(-1),*** the Li^(+)fractionation capacity of the two processes were similar,the selectivity coefficient of SNF was 24.7% higher than that of SED and,thus,the Mg/Li ratio in purified stream of the former was 19.0% lower than that of the *** to higher ion driving force,SED had clear advantages in recovery ratio and concentration ***,the specific energy consumption of SED was 20.1% lower than that of *** study provided a better understanding and guidance for the application and improvement of the two technologies.

关键词： High Mg/Li brine Purification Membrane Nanofiltration electrodialysis Lithium recovery

Acid precipitation coupled electrodialysis to improve separation of chloride and organics in pulping crystallization mother liquor

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Chinese Journal of Chemical Engineering 2019年第12期27卷 2917-2924页

作者： Zhaoyang Li Rongzong Li Zhaoxiang Zhong Ming Zhou Min Chen Weihong Xing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneNanjing Tech UniversityNanjing 211816China

Inefficient separation of inorganic salts and organic matters in crystallization mother liquor is still a problem to industrial wa stewater treatment since the high salinity significantly impedes organic pollutant degradation by oxidation or *** the study,acidification combined electrodialysis(ED)was attempted to effectively separate Cl-ions from organics in concentrate pulping ***’s rejection rate to total organic carbon(TOC)was 85%at wastewater intrinsic pH=9.8 and enhanced to 93%by acidifying it to pH=2 in ED ***-charged alkaline organic compounds(mainly lignin)could be liberated from their sodium salt forms and coagulated in acidification *** of the organic substances also made their electro-migration less effective under electric driving force and in particular improved separation efficiency of chloride and *** acid-ED coupled treatment(pH=2 and J=40 mA·cm-2)[TOC]remarkably reduced from 1.315 g·L-1 to 0.048 g·L-1 and[Cl-]accumulated to 130 g·L-1 in concentrate *** rate of NaCl was 89%and the power consumption was 0.38 kW·h·kg-1 *** fouling was not caused as electric resistance of membrane pile maintained *** conclusion,acidic-ED is a practical option to treat salinity organic wastewater when current techniques including thermal evaporation and pressure-driven membrane se paration present limitations.

关键词： Crystallization mother liquor Acid precipitation electrodialysis Chloride recovery

Fluoride removal from secondary effluent of the graphite industry using electrodialysis:Optimization with response surface methodology

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Frontiers of Environmental Science & Engineering 2019年第4期13卷 45-55页

作者： Xiaomeng Wang Ning Li Jianye Li Junjun Feng Zhun Ma Yuting Xu Yongchao Sun Dongmei Xu Jian Wang Xueli Gao Jun Gao College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China School of Chemical and Environmental Engineering Weifang University of Science & TechnologyShouguang 262700China Key Laboratory of Marine Chemistry Theory and Technology(Ministry of Education)/College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China The Institute of Seawater Desalination and Multipurpose Utilization SOATianjin 300192China

Response surface methodology was utilized to model and optimize the operational variables for defluoridation using an electrodialysis process as the treatment of secondary effluent of the graphite industry. Experiments were conducted using a Box-Behnken surface statistical design in order to evaluate the effects and the interaction of the influential variables including the operational voltage, initial fluoride concentration and flow rate. The regression models for defluoridation and energy consumption responses were statistically validated using analysis of variance (ANOVA);high coefficient of determination values (R^2 = 0.9772 and R^2 = 0.9814;respectively) were obtained. The quadratic model exhibited high reproducibility and a good fit of the experimental data. The optimum values of the initial fluoride concentration, voltage and flow rate were found to be 13.9 mg/L, 13.4 V, 102.5 L/h, respectively. A fluoride removal efficiency of 99.69% was observed under optimum conditions for the treatment of the secondary effluent of the graphite industry.

关键词： Response surface methodology Fluoride removal electrodialysis Box-Behnken design

Concentration of mixed acid by electrodialysis for the intensification of absorption process in acrylic acid production

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Chinese Journal of Chemical Engineering 2021年第8期34卷 10-18页

作者： Hanxiao Du Lixin Xie Jie Liu Shichang Xu School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Membrane Science and Desalination Technology State Key Laboratory of Chemical EngineeringTianjin UniversityTianjin 300072China School of Chemical Engineering and Technology Hebei University of TechnologyTianjin 300130China Engineering Research Center of Seawater Utilization Ministry of EducationTianjin 300130China

The absorption process in acrylic acid production was *** concentration of acrylic acid before distillation process was low,which induced to large amount of wastewater and enormous energy *** this work,a new method was proposed to concentrate the side stream of absorption column and thus increase the concentration in bottom product by *** influence of operating conditions on concentration rate and specific energy consumption were investigated by a laboratory-scale *** the voltage drop was 1 V·cP^(-1)(1 cP=10^(-3) Pa·s),flow velocity was 3 cm·s^(-1) and the temperature was 35℃,the concentration rates of acrylic acid and acetic acid could be 203.3%and 156.6%in the continual-ED *** on the experimental data,the absorption process combined with ED was simulated,in which the diluted solution from ED process was used as spray water and the concentrated solution was feed back to the absorption *** results shown that the flow rate of spray water was decreased by 37.1%,and the acrylic acid concentration at the bottom of the tower was increased by 4.56%.The ions exchange membranes before and after use 1200 h were tested by membrane surface morphology(scanning electron microscope),membrane chemical groups(infrared spectra),ion exchange capacity,and membrane area resistance,which indicated the membrane were stable in the acid *** method provides new method for energy conservation and emission reduction in the traditional chemical industry.

关键词： Acrylic acid production electrodialysis Concentration Membranes Absorption Mixtures

Study on the recovery of ionic liquids from dilute effluent by electrodialysis method and the fouling of cation-exchange membrane

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Science China Chemistry 2013年第12期56卷 1811-1816页

作者： BAI Lu WANG XiaoLiang NIE Yi DONG HaiFeng ZHANG XiangPing ZHANG SuoJiang Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Multiphase Complex SystemsInstitute of Process Engineering Chinese Academy of Science College of Chemistry and Chemical Engineering University of Chinese Academy of Sciences

With the wide application of ionic liquids(ILs)in various fields,developing efficient techniques to recover ILs from effluent is an urgent demand for the cost reduction and the environmental *** this study,an electrodialysis(ED)method was used to recover 1-butyl-3-methylimidazolium chloride([Bmim]Cl)IL from aqueous solution as model *** influences of initial IL concentration and applied voltage on the current efficiency,removal ratio,desalination ratio,membrane flux and specific energy consumption during the ED process were *** was found that the removal ratio and desalination ratio increases with the increasing of initial IL concentration and applied *** current efficiency decreases with the increasing of initial IL concentration and the current efficiency reached the maximum value of 94.3%at 25 ***,as the applied voltage increases,the membrane flux increases and the specific energy consumption ***,the fouling of cation-exchange membrane was also discovered after the desalination of *** deposits on the surface or into the membrane which is probably caused by[Bmim]+was characterized by scanning electron microscopy,elemental analysis and Fourier transform infrared.

关键词： ionic liquid electrodialysis membrane effluent recovery

Diffusion analysis and modeling of kinetic behavior for treatment of brine water using electrodialysis process

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Water Science and Engineering 2021年第1期14卷 36-45页

作者： Fadi Alakhras Emna Selmane Bel Hadj Hmida Ioannis Anastopoulos Zina Trabelsi Walid Mabrouk Noureddine Ouerfelli Jean François Fauvarque Department of Chemistry College of ScienceImam Abdulrahman Bin Faisal UniversityDammam 31441Saudi Arabia Laboratoire de Chimie Analytique et Electrochimie Departement de ChimieUniversite de Tunis El ManarTunis 2092Tunisia Department of Electronic Engineering School of EngineeringHellenic Mediterranean UniversityChania 73100Greece Laboratoire de Biophysique et Technologies Medicales Universite de Tunis El ManarTunis 1006Tunisia Laboratory of Water Membranes and Environmental BiotechnologySoliman 8020Tunisia Laboratoire d’Electrochimie Industrielle Conservatoire National des Arts et Metiers(CNAM)de ParisParis 75003France

In this study,the removal of monovalent and divalent cations,Nat,Kt,Mg2t,and Ca2t,in a diluted solution from Chott-El Jerid Lake,Tunisia,was investigated with the electrodialysis *** process was tested using two cation-exchange membranes:sulfonated polyether sulfone cross-linked with 10%hexamethylenediamine(HEXCl)and sulfonated polyether sulfone grafted with octylamine(S-PESOS).The commercially available membrane Nafion®was used for *** results showed that Nafion®and S-PESOS membranes had similar removal behaviors,and the investigated cations were ranked in the following descending order in terms of their demineralization rates:Nat>Ca2t>Mg2t>*** cations were more effectively removed by HEXCl than by monovalent *** plots based on the WebereMorris model showed a strong *** reveals that intra-particle diffusion was not the removal rate-determining step,and the removal process was controlled by two or more concurrent *** Boyd plots did not pass through their origin,and the sole controlling step was determined by film-diffusion resistance,especially after a long period of ***,a semi-empirical model was established to simulate the temporal variation of the treatment process,and the physical significance and values of model parameters were compared for the three *** findings of this study indicate that HEXCl and S-PESOS membranes can be efficiently utilized for water softening,especially when effluents are highly loaded with calcium and magnesium ions.

关键词： Ionic exchange membrane electrodialysis Brine water Boyd diffusion model Intraparticle diffusion

Separation and Purification of Glufosinate Through Combination of an electrodialysis Membrane and a Macroporous Adsorption Resin

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Chemical Research in Chinese Universities 2019年第4期35卷 647-653页

作者： CUI Menglong DU Xiaohua Catalytic Hydrogenation Research Center Zhejiang Green Pesticide Collaborative Innovation CenterCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014P. R.China

Glufosinate is a nonselective organophosphorus herbicide with low toxicity and high efficiency that is widely used in forestry, agriculture and other industries. In the process of manufacturing glufosinate, large amounts of ammonium chloride and coloured organic impurities are generated. Because of its high solubility in water, separation of glufosinate from inorganic salts is extremely difficult. Hence, a co-separation method combining an electrodialysis membrane and a macroporous adsorption resin was developed to obtain glufosinate with higlier purity. For the electrodialysis process, a glufosinate reaction solution was placed in a dilute chamber and desalinated. The concentration of inorganic salts in the resultant glufosinate aqueous solution was only 0.99 g/L under the optimal conditions of an operating voltage and a volume ratio of 9 V and 1:1, respectively. For the macroporous resin adsorption/desorption process, the sample solution treated by electrodialysis was pumped into the resin-filled column, which was eluted to obtain the eluent when the adsorption reached equilibrium. Consequently, nearly all the coloured organic impurities were removed under the optimal conditions, in which the resin type, pH value, flow rate, glufosinate concentration, temperature, ratio of ethanol and volume of eluent were LX-300C,3,0.5 mL·cm^2·min^-1,20 mg/mL,25℃, 50% and 400 mL, respectively. After the electrodialysis and adsorption/desorption process, the purity of the glufosinate was increased to 95.14%, and its recovery rate was as high as 98%. The advantages of this process included its ease of operation, environmental friendliness and low cost, which provided strong potential for its use in industrial applications.

关键词： electrodialysis membrane Glufosinate Macroporous adsorption resin Purification

Removal of Mercury(Hg(Ⅱ)) from Seaweed Extracts by electrodialysis and Process Optimization Using Response Surface Methodology

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Journal of Ocean University of China 2020年第1期19卷 135-142页

作者： SUN Jiuyi SU Xin LIU Zhen LIU Junlan MA Zhun SUN Yongchao GAO Xueli GAO Jun College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationCollege of Chemistry and Chemical EngineeringOcean University of ChinaQingdao 266100China

In this work,response surface methodology(RSM)was employed to model and optimize electrodialysis process for mercury(Hg(II))removal from seaweed ***-Behnken design(BBD)was utilized to evaluate the effects and the interaction of influential variables such as operating voltage,influent flow rate,initial concentration of Hg(II)on the removal rate of Hg(II).The developed regression model for removal rate response was validated by analysis of variance,and presented a good agreement of the experimental data with the quadratic equation with high value coefficient of determination value(R2=0.9913,RAdj 2=0.9678).The optimum operating parameters were determined as 7.17V operating voltage,72.54L h−1 influent flow rate and 5.04mgL−1 initial concentration of ***(II)removal rate of 76.45%was acquired under the optimum conditions,which showed good agreement with model-predicted(75.81%)*** results revealed that electrodialysis can be considered as a promising strategy for removal of Hg(II)from seaweed extracts.

关键词： electrodialysis seaweed extracts mercury removal response surface methodology Box-Behnken design

Modeling multicomponent ion transport to investigate selective ion removal in electrodialysis

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Environmental Science and Ecotechnology 2020年第1期1卷 48-56页

作者： Soraya Honarparvar Danny Reible Department of Chemical Engineering Texas Tech UniversityLubbockTX79409-3121USA Department of Civil Environmentaland Construction EngineeringTexas Tech UniversityLubbockTX79409-1023USA

A 2-dimensional multicomponent ion transport model based on Nernst-Planck(NP)equation and electroneutrality assumption is developed for an electrodialysis(ED)cell operated in the ohmic *** flow in channels are assumed incompressible,isothermal,and *** equilibrium and flux continuity are considered at ionexchange membrane(IEM)-solution *** account for tortuosity effects inside membranes,effective ionic diffusion coefficients are calculated using membranes water volume *** developed multicomponent model is used to elucidate the effects of feed solution properties,cell properties,system hydrodynamics,operational conditions,and membrane properties on selective divalent ion removal in the *** results indicate that the selective removal of divalent ions improves with decreasing the cell length,imposed potential,and ionic strength of feed *** mixing in spacer-filled cell also promotes selective divalent ion *** concentrations of fixed charges on the membranes results in greater selectivity toward divalent ions at short cell length and low imposed *** equal concentrations of fixed charges,membranes with high water content are less favorable for selective divalent ion *** developed framework enables the optimum selection of cell design,IEMs,spacer design,and operational conditions to selectively remove ions from multicomponent solutions.

关键词： electrodialysis Ion transport modeling Multicomponent solution Selective ion removal Scale precipitation

Research on Bipolar Membrane electrodialysis for Ion Exchange of Molecular Sieves

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China Petroleum Processing & Petrochemical Technology 2018年第2期20卷 1-5页

作者： Chen Beiyan Liu Zhongqing Zhou Lina Luo Yibin Shu Xingtian SINOPEC Science&Technology Department Beijing 100728 SINOPEC Research Institute of Petroleum Processing Beijing 100083

In view of the problems associated with large amount of discharged wastewater and serious pollution in the existing technology for removing sodium species from molecular sieves,this research work introduces the bipolar membrane electrodialysis into the process of removing sodium species from molecular sieves,and proposes a novel method of cleanly removing sodium from molecular *** results show that the technology for removing sodium ions from the molecular sieves with an indirect electrodialysis process is feasible,and can recover Na OH *** bipolar membrane electrodialysis is especially suitable for treating the USY,ZSM-5 and Beta molecular sieves with high acid-resistance,and the physicochemical properties and catalytic performance of the prepared molecular sieves are roughly equivalent to those of the ammonium ion-exchange *** comparison with the ammonium ion-exchange method,the process is clean and environmentally friendly,which consumes less water,and does not discharge wastewater to exhibit a rosy prospect of industrial application.

关键词： molecular sieve ionexchange bipolarmembrane electrodialysis