Effendi Mohd Yusni, Shunitz Tanaka, Claudio Cameselle
The potentiality of the electro-kinetic remediation (EKR) system for the removal of hydrophilic and hydrophobic dyes contaminated kaolinite soil by finding the optimum conditions to obtain the higher percentage in dye removal, were investigated. A thiazine, an azo, and a triarylmethane dyes are representing hydrophilic dyes, while Sudan III from the Sudan series dyes representing hydrophobic dyes. An EKR tool (15 cm length) equipped with a DC electric current with the maximum values of 30 V. As a result, 40-55% of dye was removed from the soil sections by using distilled water. However, by the addition of some electrolytes; the percentage of dyes removed from the soil increased from 73 to 76% and 85 to 89% for sodium sulfate, and monosodium dihydrogen phosphate, respectively. It resulted that 55-64% of dyes was removed without controlling the pH. By controlling the pH in the cathode chamber, only 18%-25% of dyes remain in the soil sections, and by controlling the pH in the anode chamber, almost 90% of tested dyes could be removed from the kaolinite chamber effectively. It also resulted that Sudan III was given more better performance than methyl yellow 2. Around 70%-80 % of Sudan III removed from the soil sections by using o 1%, 3 %, 5%, and 7% concentration of SDS. It also found that anionic surfactant is suitable for removal of hydrophobic due to the ease of treatment and extraction process. © ASCE.
Dept. of Chemistry, Faculty of Mathematics and Natural Science, State Univ. of Padang, Padang WS, 25131, Indonesia; Graduate School of Environmental Science, Hokkaido Univ., N10W5, Sapporo, Hokkaido, 060-0810, Japan; Dept. of Chemical Engineering, Univ. of Vigo, Vigo, 36310, Spain
