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- Title
Remediation of Nickel- Contaminated Clayey Soil by Electro-Kinetic Technology Coupled with Zeolite - a Permeable Reactive Barrier.
- Authors
Khalil, Amal H.; Abdalwahedb, Ban
- Abstract
This study checks the effectiveness of using different purging solutions: acetic acid (AA), ammonium citrate (AC), ethylenediarminetertraacetic (EDTA), and sodium dodecyl sulphate (SDS)_ as purging solutions for saturating soil. The study also investigates the using a catholyte solution in the electro-kinetic (EK) process coupled with zeolite as a permeable reactive barrier (PRB). The nickel-contaminated clayey soil is loaded as positions I, II, III, IV, and V from the anode to the cathode. The PRBs/Zeolite are put in three regions: near the anode side, in the center, and near the cathode side (positions I, III, and V). Twelve different tests (Series-1& Series-2) were conducted on clay soil spiked with nickel in concentrations of 250 mg/kg. These tests were conducted with a voltage gradient of 1.5V/cm and processing time of 4 days for the Series-1 and 3 days for the Series-2. The results indicate that the EK/PRB leads to a significant improvement in the efficiency of removal and in reducing the remediation duration. While the removal efficiency in tests when AA using as purging solution and zeolite-PRB was inserted at various positions (I, III, and V) was 51.6%, 57.12%, and 41%, respectively. the removal efficiency is greater than that in the test of the electro-kinetic process without a barrier (i.e. 34.4%) under the same conditions.
- Publication
Environmental Research, Engineering & Management / Aplinkos Tyrimai, Inžinerija ir Vadyba, 2017, Vol 73, Issue 4, p58
- ISSN
1392-1649
- Publication type
Academic Journal
- DOI
10.5755/j01.erem.73.4.19188