The role of humic acid in Fenton reaction for the removal of aliphatic fraction of total petroleum hydrocarbons (diesel range) in soil

Seyedeh Pegah Jalilian Ahmadkalaei; Suyin Gan; Hoon Kiat Ng; Suhaimi Abdul Talib

Environmental Science and Ecotechnology (Jul 2021)

The role of humic acid in Fenton reaction for the removal of aliphatic fraction of total petroleum hydrocarbons (diesel range) in soil

Seyedeh Pegah Jalilian Ahmadkalaei,
Suyin Gan,
Hoon Kiat Ng,
Suhaimi Abdul Talib

Affiliations

Seyedeh Pegah Jalilian Ahmadkalaei: Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia
Suyin Gan: Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia; Corresponding author.
Hoon Kiat Ng: Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia
Suhaimi Abdul Talib: Faculty of Civil Engineering, Universiti Teknologi MARA, 40450, Shah Alam, Selangor Darul Ehsan, Malaysia

Journal volume & issue: Vol. 7
p. 100109

Abstract

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This study investigated the role of humic acid in Fenton reaction for the total petroleum hydrocarbons (TPH) (diesel) in soil. Batch reactions were conducted at varying humic acid dosages and pH. For the lowest molecular weight diesel contaminants, a humic acid dosage of 10 mg/l produced the favourable effect of reducing Fe3+ to Fe2+ which continued for higher humic acid dosages of 50, 100 and 150 mg/l. Conversely, for higher molecular weight diesel contaminants, the negative effect of hydroxyl radicals consumption by the humic acid was more significant than its reduction of Fe3+ to Fe2+. The positive role of humic acid on Fenton reaction increased with increasing humic acid dosage for the overall TPH, with an optimum dosage of 150 mg/l. At higher pH, the removal efficiencies increased or reduced depending on the molecular weight of TPH. The power law and pseudo-first-order kinetic models fitted the experimental kinetic data well.

Published in Environmental Science and Ecotechnology

ISSN: 2666-4984 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Geography. Anthropology. Recreation: Environmental sciences; Technology: Environmental technology. Sanitary engineering
Website: https://www.journals.elsevier.com/environmental-science-and-ecotechnology

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