Fenton oxidation and combined Fenton-microbial treatment for remediation of crude oil contaminated soil in Assam – India

Abstract

The study is aimed at the remediation of soil spiked with crude oil (5%) by employing Fenton oxidation, biological treatment and combined Fenton-biological treatment. A spiked concentration of 5% crude oil was selected on the basis of contamination levels of 0-5% as found in the soil of upper Assam oil fields (India). The degradation of the aliphatic fraction (C14-C28) of the crude oil was investigated by gas chromatography. Fenton oxidation was carried out at different pH (3 to 8) in a laboratory batch reactor and maximum oxidative degradation was observed at pH 3-5. At pH 3, single Fenton oxidation resulted in 36 and 57% degradation in 5 and 10 days respectively. Biological treatment (with Fusarium solani) and combined Fenton-biological treatment were carried out with a one month incubation period. Biological treatment alone brought about 61% degradation of the crude oil while the combined process could achieve as much as 75% degradation of the aliphatic fractions of the crude oil.

Simultaneously Recovering High-Purity Chromium and Removing Organic Pollutants from Tannery Effluent

“…As seen in Figure 2(c), the temperature has a great influence on the reaction. However, the increase in temperature has two opposite influences on the reaction [31]. Although the producing of hydroxyl radicals increases at the higher temperature, hydrogen peroxide also experienced selfpromoting decomposition.…”