Study of polyethyleneimine coating on membrane permselectivity and desalination performance during pilot-scale electrodialysis of reverse osmosis concentrate

Xu, Xuesong; Li, Lin; Ma, Guanyu; Wang, Huiyao; Jiang, Wenbin; He, Qun; Nirmalakhandan, Nagamany; Xu, Pei

doi:10.1016/j.seppur.2018.06.070

Cited by 41 publications

(20 citation statements)

References 59 publications

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“…Pilot tests were conducted with a commercial-size ED unit (two electrical stages and four hydraulic stages) fed by BWRO brine (~10 g/L TDS, water recovery of 82.5%) [493]. ED recovered 55% of its feed, raising the overall recovery to 92.1%.…”

Section: Bwro Brinementioning

confidence: 99%

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

et al. 2020

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This paper presents a comprehensive review of studies on electrodialysis (ED) applications in wastewater treatment, outlining the current status and the future prospect. ED is a membrane process of separation under the action of an electric field, where ions are selectively transported across ion-exchange membranes. ED of both conventional or unconventional fashion has been tested to treat several waste or spent aqueous solutions, including effluents from various industrial processes, municipal wastewater or salt water treatment plants, and animal farms. Properties such as selectivity, high separation efficiency, and chemical-free treatment make ED methods adequate for desalination and other treatments with significant environmental benefits. ED technologies can be used in operations of concentration, dilution, desalination, regeneration, and valorisation to reclaim wastewater and recover water and/or other products, e.g., heavy metal ions, salts, acids/bases, nutrients, and organics, or electrical energy. Intense research activity has been directed towards developing enhanced or novel systems, showing that zero or minimal liquid discharge approaches can be techno-economically affordable and competitive. Despite few real plants having been installed, recent developments are opening new routes for the large-scale use of ED techniques in a plethora of treatment processes for wastewater.

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Section: Bwro Brinementioning

confidence: 99%

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

et al. 2020

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“…In addition to MVAmembranes,monovalent selective-tocation (MVC) membranes can be included to separate monovalent and divalent cations. [46] Thea pplication of MVC membranes in electrodialysis systems has also been explored in terms of how the operating conditions,s uch as conductivity,c urrent density,l inear velocity,h ydraulic retention time,a nd stack staging, affect the ion selectivity. [43] By separating the divalent anions and cations,t he formation of molecules that often cause scaling in BMED systems (e.g.,C aCO 3 and calcium sulfate (CaSO 4 )) can be prevented.…”

Section: Selective Electrodialysismentioning

confidence: 99%

“…[44,45] Fori nstance,c oating the surface of am embrane with polyethyleneimine improved the selectivity for monovalent cations over divalent cations while simultaneously increasing the overall water recovery after RO treatment. [46] Thea pplication of MVC membranes in electrodialysis systems has also been explored in terms of how the operating conditions,s uch as conductivity,c urrent density,l inear velocity,h ydraulic retention time,a nd stack staging, affect the ion selectivity. [41,47] Dotel et al tested as elective electrodialysis system with different solutions (i.e., at ernary solution, synthetic seawater,a nd real seawater) at different current densities,w hich showed that the charge,s ize,a nd concentration of the ions had the largest influence on the systemss electivity.…”

Section: Selective Electrodialysismentioning

confidence: 99%

Integrated Valorization of Desalination Brine through NaOH Recovery: Opportunities and Challenges

et al. 2019

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The rising use of seawater desalination for fresh water production is driving a parallel rise in the discharge of high‐salinity brine into the ocean. Better utilization of this brine would have a positive impact on the energy use, cost, and environmental footprint of desalination. Furthermore, intermittent renewable energy can easily power the brine utilization and, for reverse osmosis technology, the entire desalination plant. One pathway toward these goals is to convert the otherwise discharged brine into useful chemicals; waste could be transformed into sodium hydroxide or caustic soda (NaOH) and hydrochloric acid (HCl). In this Minireview, we discuss opportunities and challenges for integrated valorization of desalination brine through NaOH and HCl recovery.

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“…RO can work at approximately 3.0 kWh/m 3 for desalination of saline water at 40% retrieval [13]. However, the presence of chlorine in saline water damages the polyamide membrane [14,15], and the membrane replacement process is very costly [16]. Adsorption and nanofiltration methods are not constantly sufficient to reach the discharge limits [17], while the electrodeposition process requires a long reaction time for the treatment [17,18].…”

Section: Introductionmentioning

confidence: 99%

Treatment of Saline Water Using Electrocoagulation with Combined Electrical Connection of Electrodes

et al. 2019

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Saline water treatment has become increasingly important for drinking water supplies. The aim of this study was to evaluate the ability of the electrocoagulation (EC) process with combined aluminum electrodes in removing various types of salt from water samples collected at Sawa Lake, Al-Muthanna, Iraq. The targeted types of salt include total dissolved solids (TDS), chloride salt (Cl−), bromine (Br−), and sulphate (SO42−). A bench scale consisting of combined EC configurations with static electrodes was employed under combined electrical connections. The effect of the six variables factors, such as applied current density (I), reaction time (RT), pH, temperature (T), stirring speed (Mrpm) and inter electrode distance (IED) were observed to achieve a higher removal of TDS, Cl−, Br− and SO42−. Initial results showed the following optimum operating conditions: I = 2 mA/cm2, RT = 80 min, pH = 8, T = 25 °C, IED = 1 cm and Mrpm = 500. The maximum removal efficiency of TDS, Cl−, Br− and SO42− were 91%, 93%, 92% and 90%, respectively. It can be concluded that the EC method applied in the present study was effective to removing salts from lake water.

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Study of polyethyleneimine coating on membrane permselectivity and desalination performance during pilot-scale electrodialysis of reverse osmosis concentrate

Cited by 41 publications

References 59 publications

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

Integrated Valorization of Desalination Brine through NaOH Recovery: Opportunities and Challenges

Treatment of Saline Water Using Electrocoagulation with Combined Electrical Connection of Electrodes

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