Feasibility studies on arsenic removal from aqueous solutions by electrodialysis

doi:10.1080/10934529.2014.859035

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Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/28581

Title:	Feasibility studies on arsenic removal from aqueous solutions by electrodialysis
Authors:	Mendoza, Rose Marie O. Kan, Chi-Chuan Chuang, Shih-Shing Pingul-Ong, Sheila Mae B. Dalida, Maria Lourdes P. Wan, Meng-Wei
Contributors:	溫泉產業研究所環境工程與科學系
Keywords:	Electrodialysis arsenic removal limiting current density
Date:	2014-04
Issue Date:	2015-05-06 21:21:26 (UTC+8)
Publisher:	Taylor & Francis Inc
Abstract:	The effectiveness of electrodialysis (ED) in removing inorganic arsenic (As) from aqueous solution was investigated. A tailor-made ED stack was used to perform current-voltage and optimization experiments in a recirculating batch mode. Samples were pre-oxidized with NaClO using 1:2 sample to oxidant weight ratio (R-S:O) to transform 100% of As(III) to As(V) in 180 seconds. A high feed water conductivity of 1500S/cm and a low feed water conductivity of 800S/cm had limiting currents of 595mA and 525mA, respectively. Optimum experimental conditions that provided maximum As separation were applied potential (E) of 12V, feed flow rate (Q) of 0.033 L/s, feed concentration (C) of 662.0g L-1, and operating time (t) of 45min, the most significant ones were applied potential, feed concentration and operating time. Model confirmation experiments showed a good agreement with experimental results with only 0.031% error. The total As in the diluate stream was 4.0g L-1, consisting of an average of 3.0g L-1 As(V) and 1.0g L-1 As(III).
Relation:	Journal of Environmental Science and Health Part A-Toxic/Hazardous Substances & Environmental Engineering, v.49 n.5, pp.545-554
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles [Dept. of Tourism Management] Periodical Articles

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