Resolving The Accumulation Effect Of Lead Ions In The Contaminated Soil By Electro-Kinetic Remediation

Authors

  • Rosul Nidhal, Prof. Dr. Amal Kalil

Abstract

The accumulation effect of heavy metal has been a limiting factor in the electro-kinetic processes. In order to solve this problem, a superimposed fixed anode (FA) and approaching anode (AAs) technique is proposed by using multiple anode technology. Three sets of experiments were used by fixed and approaching anode technique. The first set has used 1M acetic acid purging solution as catholyte in which the average removal efficiency of lead at A and B sampling points for FA experiment was low to about 23.9% and 18.6%, respectively, while in AAs experiment its increase to reach 36.2% and 25.4% at A and B sampling points, respectively. In second set has utilized mixing of 1M acetic acid and 0.2M EDTA (Disodium ethylenediaminetetraacetic  acid) enhanced solution as catholyte. In this case, mixing of purging solution appeared high enhancement in the electro-kinetic process, 74.1% and 71.2% of lead in FA experiment & 79.2% and 78.4% of lead in AAs experiment was removed at A and B sampling points, respectively. The third set has achieved by examining the action of anodes increasing by using the same purging solutions (EDTA+acetic acid). The multi-anode technique for both quadruple and octagonal anode configuration in the second and third sets witnessing excessive low pH 5.7 in the FA experiment and 5.5 in the AAs experiment at A1 sampling points in the remediation of lead contaminated soil As well as providing a higher removal efficiency. At the end, the results proved that the use of the multi-anode electrokinetic process leads to a significant improvement in the removal efficiency and this appears in all experiments when no accumulation of lead has occurred in all sections of the soil.

Published

2020-11-01

Issue

Section

Articles