Modeling of electrokinetic remediation of Cd- and Pb-contaminated kaolinite

Milad Rezaee; Gholamreza Asadollahfardi; Cesar Gomez-Lahoz; Maria Villen-Guzman; Juan Manuel Paz-Garcia

doi:10.1016/j.jhazmat.2018.12.034

Modeling of electrokinetic remediation of Cd- and Pb-contaminated kaolinite

J Hazard Mater. 2019 Mar 15:366:630-635. doi: 10.1016/j.jhazmat.2018.12.034. Epub 2018 Dec 11.

Authors

Milad Rezaee¹, Gholamreza Asadollahfardi¹, Cesar Gomez-Lahoz², Maria Villen-Guzman², Juan Manuel Paz-Garcia³

Affiliations

¹ Department of Civil Engineering, Kharazmi University, Tehran, Iran.
² Department of Chemical Engineering, University of Malaga, Malaga, Spain.
³ Department of Chemical Engineering, University of Malaga, Malaga, Spain. Electronic address: juanma.paz@uma.es.

PMID: 30579229
DOI: 10.1016/j.jhazmat.2018.12.034

Abstract

A physiscochemical model is presented for the reactive-transport of chemical scpecies through a contaminated soil during an acid-enhanced electrokinetic remediation treatment. Numerical simulations in the specific case of the removal of cadmium and lead from spiked kaolinite, compared with experimental results from the literature. The reactive-transport based on the local chemical equilibrium assumption, including a surface complexation to model the adsorption of cations (metals and protons). Comparison of simulation results show different beavior of the target metals, as cadmium is mainly retaind by surface interaction while lead is retained by precipitation of a solid phase.

Keywords: Cadmium; Electrokinetic remediation; Kaolinite; Reactive-transport modeling; Surface complexation model.

Publication types

Research Support, Non-U.S. Gov't