Electrodialysis of groundwater with heavy metal and nitrate ions under low conductivity and effects of superficial velocities. Issue 55 (25th November 2016)

• Record Type: Journal Article
• Authors: Choi, Su Young; Park, Keun Young; Yu, Yongjae; Kim, Hee Jun; Park, Ki Young; Kweon, Ji Hyang; Choe, Jae Wan
• Is Part Of: Desalination and water treatment. Volume 57:Issue 55(2016)
• Page Start: 26741
• Page End: 26750
• Publication Date: 2016-11-25
• Subjects: Electrodialysis -- Heavy metal -- Nitrate -- Separation -- Superficial velocity; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2016.1190112
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: The efficiency of separation of lead, manganese, arsenic, and nitrate from groundwater with relatively low conductivity by electrodialysis (ED) was investigated. The effects of the superficial velocities in either the diluate or concentrate cell were also evaluated to understand the relative separation rate of the four ionic compounds by ED and to examine the possibility of reducing the energy for pumping. Significant removal (i.e. 92.8–99.2%) of manganese, arsenic, and nitrate from Ilgam (Seoul, Korea) groundwater was achieved, along with removal (61.3%) of lead comparable to that of Sungbuk (Seoul, Korea) water. The superficial velocity in the concentrate cell exerted no effects on either the conductivity or current reduction, or on the separation ratios. The superficial velocity in the diluate cell increased the operation time required to obtain the requisite conductivity reduction, but exerted little effect on the separation ratios. ED could be performed at reduced water velocity to treat groundwater with low conductivity.