Remediation of Cu Contaminated Soil by Fe78Si9B13AP Permeability Reaction Barrier Combined with Electrokinetic Method

Abstract

Iron-based amorphous crystalline powder Fe 78 Si 9 B 13 AP is used as a permeability reaction barrier (PRB) combined with an electrokinetic method (EK-PRB) to study the removal rate of Cu in contaminated soil. After treating Cucontaminated soil for 5 days under different voltage gradients and soil water content, the soil pH is between 3.1 and 7.2. The increase of voltage gradient and soil water content can effectively promote the movement of Cu 2+ to the cathode. The voltage gradient is 3 V/cm, and the water content of 40% is considered to be an optional experimental condition. Therefore, under this condition, the effects of Fe 78 Si 9 B 13 AP and zero-valent iron (ZVI) as PRB on the removal rate of total Cu in soil and the transformation of chemical forms of Cu are studied. Compared with ZVI, Fe 78 Si 9 B 13 AP as PRB has a better remediation effect. EK-Fe 78 Si 9 B 13 AP can remove 80.3% of total Cu in soil, and the biologically available Cu is reduced to 3.6%, which effectively reduces the environmental risk of contaminated soil.

Removal of Pb from Contaminated Kaolin by Pulsed Electrochemical Treatment Coupled with a Permeable Reactive Barrier: Tuning Removal Efficiency and Energy Consumption

“…Zhang et al confirmed that removal efficiency increased by 20% in the ECT of Pb-contaminated kaolin by adding acetic acid [ 28 ]. Moreover, in recent years, various eco-friendly adsorbent materials have been employed in remediating heavy metal-contaminated soil by acting as permeable reactive barriers (PRBs) [ 29 ]. These materials exhibit strong adsorption capabilities, possess large specific surface areas, and contain abundant functional groups [ 19 ].…”