Groundwater treatment by electrodialysis: gearing up toward green technology

doi:10.5004/dwt.2018.22929

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標題:	Groundwater treatment by electrodialysis: gearing up toward green technology
作者:	Mendoza, Rose Marie O. Dalida, Maria Lourdes P. Kan, Chi-Chuan Wan, Meng-Wei
貢獻者:	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
關鍵字:	Electrodialysis Groundwater treatment Removal efficiency Green technology Sustainable environment
日期:	2018-09
上傳時間:	2019-11-15 15:42:50 (UTC+8)
出版者:	DESALINATION PUBL
摘要:	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.
link:	http://dx.doi.org/10.5004/dwt.2018.22929
關聯:	Journal of Oleo Science, v.127, pp.178-183
顯示於類別:	[觀光事業管理系(含溫泉所)] 期刊論文 [環境資源管理系(所)] 期刊論文

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