REMOVAL OF HEXAVALENT CHROMIUM FROM AQUEOUS SOLUTION USING BIPOLAR MEMBRANE ELECTRODIALYSIS TECHNIQUE

DAI Li-ping; ZHU Han-quan; KE Xiong; CHEN Ri-yao; LIU Yao-xing

doi:10.13205/j.hjgc.202111011

Volume 39 Issue 11

Jan. 2022

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DAI Li-ping, ZHU Han-quan, KE Xiong, CHEN Ri-yao, LIU Yao-xing. REMOVAL OF HEXAVALENT CHROMIUM FROM AQUEOUS SOLUTION USING BIPOLAR MEMBRANE ELECTRODIALYSIS TECHNIQUE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 89-95. doi: 10.13205/j.hjgc.202111011

Citation:

DAI Li-ping, ZHU Han-quan, KE Xiong, CHEN Ri-yao, LIU Yao-xing. REMOVAL OF HEXAVALENT CHROMIUM FROM AQUEOUS SOLUTION USING BIPOLAR MEMBRANE ELECTRODIALYSIS TECHNIQUE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 89-95. doi: 10.13205/j.hjgc.202111011

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REMOVAL OF HEXAVALENT CHROMIUM FROM AQUEOUS SOLUTION USING BIPOLAR MEMBRANE ELECTRODIALYSIS TECHNIQUE

doi: 10.13205/j.hjgc.202111011

1. Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China;
2. China Certification & Inspection Group Fujian Co., Ltd, Fuzhou 350015, China

Received Date: 2020-08-21
Available Online: 2022-01-26

Abstract

Abstract

In the present work, a bipolar membrane electrodialysis(BMED) was used to remove and recover hexavalent chromium[Cr(Ⅵ)] in form of H₂CrO₄ from the simulated wastewater. The effects of electrolyte concentration in wastewater, current density, and initial Cr(Ⅵ) concentration on removal of Cr(Ⅵ) were investigated. The experimental results showed that the electrolyte concentration of 1 g/L and current density of 2 mA/cm² were the optimal experimental conditions when initial Cr(Ⅵ) concentration was 500 mg/L, and the removal rate was 97.6%. A higher current efficiency (CE) and a lower specific energy consumption (SEC) were obtained when two and three wastewater compartment were equipped in the BMED system and Cr(Ⅵ) removal rates in all wastewater compartments were higher than 97.0%. With the increase in the number of equipped wastewater compartment from one to two and three in the BMED system, CE increased from 31.5% to 125.8% and 284.4%, SEC decreased from 19.49×10^-3 to 7.76×10^-3, 4.17×10^-3 kW·h/g Cr(Ⅵ), respectively. Experimental results showed that the BMED was an effective method for the removal and recovery of Cr(Ⅵ) from aqueous solution.
- electrodialysis,
- bipolar membrane,
- Cr(Ⅵ),
- removal

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References(19)

References

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