Electromigration of Contaminated Soil by Electro-Bioremediation Technique

Soft Soil Engineering International Conference 2015

Azhar, A.T.S.^1,2 ; Nabila, A.T.A.^1,2 ; Nurshuhaila, M.S.^3 ; Shaylinda, M.Z.N.^2 ; Azim, M.A.M.^1,2

Research Center for Soft Soil, Universiti Tun Hussein Onn Malaysia, Batu Pahat Johor

86400, Malaysia^1

Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat Johor

86400, Malaysia^2

Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Batu Pahat Johor

86400, Malaysia^3

关键词: Electrical gradients;    Electro-bioremediation;    Electrokinetic process;    Human health problems;    Pseudomonas putida;    Soil contamination;    Technological solution;    Zinc concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/136/1/012023/pdf
DOI  :  10.1088/1757-899X/136/1/012023

来源: IOP

【 摘 要 】

Soil contamination with heavy metals poses major environmental and human health problems. This problem needs an efficient method and affordable technological solution such as electro-bioremediation technique. The electro-bioremediation technique used in this study is the combination of bacteria and electrokinetic process. The aim of this study is to investigate the effectiveness of Pseudomonas putida bacteria as a biodegradation agent to remediate contaminated soil. 5 kg of kaolin soil was spiked with 5 g of zinc oxide. During this process, the anode reservoir was filled with Pseudomonas putida while the cathode was filled with distilled water for 5 days at 50 V of electrical gradient. The X-Ray Fluorescent (XRF) test indicated that there was a significant reduction of zinc concentration for the soil near the anode with 89% percentage removal. The bacteria count is high near the anode which is 1.3x107 cfu/gww whereas the bacteria count at the middle and near the cathode was 5.0x106 cfu/gww and 8.0x106 cfu/gww respectively. The migration of ions to the opposite charge of electrodes during the electrokinetic process resulted from the reduction of zinc. The results obtained proved that the electro-bioremediation reduced the level of contaminants in the soil sample. Thus, the electro-bioremediation technique has the potential to be used in the treatment of contaminated soil.