Izvorni znanstveni članak
https://doi.org/10.15255/CABEQ.2017.1204
A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil
M. Abtahi
; Department of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
S. Jorfi
; Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
N. Mehrabi
; Department of Environmental Health Engineering, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
R. Saeedi
; Department of Health Sciences, School of Health, Safety and Environment, Shahid Beheshti University of Medical Sciences, Tehran, Iran
R. Darvishi Cheshmeh Soltani
; Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran
G. Barzegar
; Department of Environmental Health Engineering, Behbahan Faculty of Medical Sciences, Behbahan, Iran
Sažetak
Effect of surfactant addition on persulfate-assisted electrokinetic remediation of pyrene-spiked soil was studied. The influence of effective factors including voltage, surfactant addition, moisture content, and persulfate concentration on the removal of initial pyrene concentration of 200 mg kg–1 were investigated. A complete pyrene removal was observed for voltage of 1 V cm–1, saturated conditions, Tween 80 concentration of 20 mL kg–1, and persulfate concentration of 100 mg kg–1 after 24 h, corresponding to pyrene mineralization of 61 %, based on TPH analysis. The experimental results were best fitted with pseudo-first-order kinetic model with correlation coefficient of 0.968 and rate constant of 0.191 min−1. The main intermediates of pyrene degradation were benzene o-toluic acid, acetic, azulene, naphthalene and decanoic acid. Finally, an unwashed hydrocarbon-
contaminated soil was subjected to persulfate-assisted electrokinetic
remediation, and a TPH removal of 38 % was observed for the initial TPH content of 912 mg kg–1, under the selected conditions.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Ključne riječi
soil remediation; electrokinetic oxidation; persulfate; surfactant; pyrene
Hrčak ID:
197233
URI
Datum izdavanja:
29.3.2018.
Posjeta: 1.418 *