Enhancement Solution to Improve Remediation of Soil Contaminated with Lead by Electrical Field

Abstract

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 %.
 

Study of the Removal Efficiency of Chromium Ions Using a Membrane by Electro-Kinetic Technique from Sludge

“…This technique can be used on-site (in situ) or to excavate contaminated soil and transfer it to the laboratory (ex situ) [ 5 , 6 ]. The major feature of the electro-kinetic methods is the removal of in situ soil contaminants, which may be considered a preferred treatment choice compared to other conventional ex situ treatment methods, such as solidification/stabilization and soil washing [ 7 , 8 , 9 , 10 ]. Heavy metals accumulate in the pH leaping zone during the electro-kinetic remediation process.…”