Treatment of petroleum hydrocarbons contaminated soil by Fenton like oxidation

Experimental tests were carried out in solid phase reactors on a microcosm scale, to removal old petroleum pollution by Fenton like oxidation process. In order to optimize the process, parametric study and statistically designed experiment have been undertaken by considering the amount influence of...

Full description

Saved in:
Bibliographic Details
Published in:Chemosphere (Oxford) 2019-10, Vol.232, p.377-386
Main Authors: Ouriache, H., Arrar, J., Namane, A., Bentahar, F.
Format: Article
Language:English
Subjects:
EDTA
Fenton-like
Oxidation
Petroleum hydrocarbons
Soil remediation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Experimental tests were carried out in solid phase reactors on a microcosm scale, to removal old petroleum pollution by Fenton like oxidation process. In order to optimize the process, parametric study and statistically designed experiment have been undertaken by considering the amount influence of hydrogen peroxide (H2O2), endogenous and zero-valent iron (Fe) and ethylene diamine tetraacetic acid (EDTA) as chelating agent. The measurement of residual total petroleum hydrocarbons for different H2O2/Fe molar ratios and pH in the vicinity of neutrality highlighted oxidation rates ranging between 29.0 and 39.3%. The Fenton like (FL) oxidation was optimal for H2O2/Fe molar ratio of 15/4. The use EDTA led to result up 72.2% for H2O2/total Fe/EDTA molar ratio of 15/4/4 after 48 h of treatment. The statistical analysis of data by factorial design, has allowed the modeling of Fenton like process performances in the operating domain. It showed that hydrogen peroxide amount, interaction effects of oxidant-catalyst, catalyst-chelating agent, and oxidant-catalyst-chelating agent, were the influential parameters. Moreover, these results suggest that endogenous iron could be used as a source of iron in the presence of the chelating agent to activate FL oxidation. A better accuracy (80.0%) was obtained by statistical analysis for H2O2/endogenous Fe/EDTA molar ratio of 20/1/1. •FL oxidation without pH modification for aged petroleum hydrocarbons contaminated soil.•Parametric study and Statistically designed experiment on FL oxidation performances.•H202, key factor affecting TPHS removal efficiency with important interaction effects H2O2-Fe, Fe-EDTA and H2O2-Fe-EDTA.•Endogenous iron exhibits high catalytic potential to activate H2O2 in presence of EDTA.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2019.05.060