earticle

영어

This paper presents a systematic laboratory study performed to assess the effect of electrode configuration on the transport of Cu ions during electrokinetic soil remediation (EKR) process by observing pH and Cu distribution. The electrode configuration used in this experiment consisted of placing titanium wire electrodes into soil samples. In the first four soil samples electrodes formed a cathode-anode-cathode angle (CAC <) of 0o, 20o, 40o and 60o respectively, and a constant voltage of 2.33 V/cm was applied. In the remaining two soil samples, the electrodes were placed at a CAC angle of 60o and the voltage fixed to 2.22 V/cm and 2.44 V/cm respectively. A silty clay from Huangdao seaside in Shandong (China) was used for this work. The soil was artifitially contaminated using CuSO4 ·5H2O to obtain an initial Cu concentration of 554 mg/Kg. Generally the experiment showed that there were high levels of Cu concentrations located in between the electrodes in spots. These high concentration spots disrupted the uniform distribution contours formed closer to the anode. It was also discovered that the Cu concentration levels were lower with increasing CAC angle indicating that the most desirable Cu migration occurs with a CAC angle of 60o and an electrode voltage of 2.33 V/cm. Overall this study showed that with a 60o CAC < and an electric potential of 2.33 V/cm, Cu migration is optimized.