Enhancement solution to improve remediation of soil contaminated with lead by electrical field

Abstract EN

A laboratory investigation of six different tests were conducted on silty clay soil spiked with lead in concentrations of 1500 mg/kg.

A constant DC voltage gradient of 1 V/cm was applied for all these tests with duration of 7 days remediation process for each test.

Different purging solutions and addition configurations, i.e.

injection wells, were investigated experimentally to enhance the removal of lead from Iraqi soil during electro-kinetic remediation process.

The experimental results showed that the overall removal efficiency of lead for tests conducted with distilled water, 0.1 M acetic acid, 0.2 M EDTA and 1 M ammonium citrate as the purging solutions were equal to 18 %, 37 %, 42 %, and 29 %, respectively.

However, introducing the injection wells as another enhancement technique into the tests used the same purging solutions mentioned above which have vital role in increasing the removal efficiency up to 59 %.