Groundwater treatment by electrodialysis: gearing up toward green technology

doi:10.5004/dwt.2018.22929

CNU IR > College of Sustainable Environment and Recreation > Dept. of Tourism Management > Periodical Articles > Item 310902800/32150

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/32150

Title:	Groundwater treatment by electrodialysis: gearing up toward green technology
Authors:	Mendoza, Rose Marie O. Dalida, Maria Lourdes P. Kan, Chi-Chuan Wan, Meng-Wei
Contributors:	Far Eastern Univ, Nicanor Reyes Med Fdn, Gen Educ Dept Univ Philippines, Dept Chem Engn, Natl Grad Sch Engn Chia Nan Univ Pharm & Sci, Inst Hot Spring Ind Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
Keywords:	Electrodialysis Groundwater treatment Removal efficiency Green technology Sustainable environment
Date:	2018-09
Issue Date:	2019-11-15 15:42:50 (UTC+8)
Publisher:	DESALINATION PUBL
Abstract:	The performance of a tailor-made electrodialysis stack to treat groundwater was conducted and evaluated. The stack was operated at optimum experimental conditions at applied voltage of 17 V, feed flow velocity of 0.033 L/s, and desalination time of 92 min. Major cation contents of the groundwater were Na, K, Ca, Mg, and As, and anions identified were Cl, NO3, SO4, HCO3, and PO4. The average cation and anion removal efficiency were 99.15% and 100%, respectively. The oxidation-reduction potential was also recorded to increase from -162.2 to 908 mV, indicating a shift from a highly reducing to a highly oxidizing reaction. Solution pH was also noted to drop from 7.62 to 5.80 with corresponding decrease in the conductivity of 1,388-36 mu S/cm. The product water can be classified as that of purified water and suitable for drinking and analytical purposes. Arsenic desalination kinetics was found to increase overtime at constant applied voltage and feed flow rate. Lower As feed concentration samples tend to achieve product water concentrations with maximum contaminant level lower than 10 ppb earlier than high feed concentration samples.
???metadata.dc.relation.uri???:	http://dx.doi.org/10.5004/dwt.2018.22929
Relation:	Journal of Oleo Science, v.127, pp.178-183
Appears in Collections:	[Dept. of Tourism Management] Periodical Articles [Dept. of Environmental Resources Management] Periodical Articles

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