Electrokinetic Removal of Petroleum Hydrocarbon from Residual Clayey Soil Following a Washing Process
- Authors
- Jeon, Chil-Sung; Yang, Jung-Seok; Kim, Kyung-Jo; Baek, Kitae
- Issue Date
- Feb-2010
- Publisher
- WILEY
- Keywords
- Electrokinetic; Electrolyte; Electroosmosis; Surfactant; Total petroleum hydrocarbon
- Citation
- CLEAN-SOIL AIR WATER, v.38, no.2, pp 189 - 193
- Pages
- 5
- Journal Title
- CLEAN-SOIL AIR WATER
- Volume
- 38
- Number
- 2
- Start Page
- 189
- End Page
- 193
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/27342
- DOI
- 10.1002/clen.200900190
- ISSN
- 1863-0650
1863-0669
- Abstract
- This study investigates total petroleum hydrocarbon (TPH) removal from residual clayey soil, after a washing procedure, using an electrokinetic process. Eight electrokinetic experiments were carried out to investigate the characteristics of TPH removal. When 0.1 M MgSO4 or 0.1 M NaOH was used as an electrolyte, the electric current rapidly increased within the first 100 or 200 h, respectively. A negatively charged soil surface resulted in a more negative zeta potential and greater electroosmotic flow toward the cathode. Therefore, the accumulated electroosmotic flow (EOF) when using 0.1 M NaOH as the anolyte-purging solution was higher than when using 0.1 M MgSO4. Although the energy consumption for the two purging solutions was similar, the efficiencies of TPH removal when 0.1 M MgSO4 and 0.1 M NaOH with surfactant were used were 0 and 39, respectively, because the electroosmotic flow rate increased with TPH removal efficiency. Mien 5 isopropyl alcohol (IPA) was used as a circulation solution, the electric current increased but the TPH removal was similar to that using water. In terms of energy consumption, the use of a surfactant-enhanced electrokinetic process with NaOH as electrolyte was effective in removing TPHs from low-perineability soil.
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