Removal of PAHs from Creosote Oil Contaminated Soil by Addition of Concentrated H2O2 and Biodegradation

Abstract

This study describes the combined chemical, i.e. modified Fenton’s reaction, and aerobic biological removal of polycyclic aromatic hydrocarbons (PAHs) in creosote oil contaminated soil. The initial concentration of eight selected PAHs (acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benz(a)anthracene and chrysene) was 4 g/kg soil. The soil was rich in iron (16.4 g Fe/kg soil) and slightly acidic (pH 5-6). Therefore, no pH adjustment or iron addition was performed. Aged contaminated soil was treated with 30% H

Coupling chemical oxidation and biostimulation: Effects on the natural attenuation capacity and resilience of the native microbial community in alkylbenzene-polluted soil

“…1C 15 commercial LAB (Sigma Aldrich, 10 mg/kg) was used as an internal surrogate. Water was poured off the samples.…”

“…The use of chemical oxidants at certain concentrations to degrade pollutants can hamper further biodegradation processes [7]. However, recent studies indicate that, although chemical oxidation temporarily reduces microbial activity, bacterial populations have the ability to regenerate [11,15,16]. In addition chemical oxidation has also been suggested to improve further biodegradation by depleting toxic compounds for native microbial communities [17], improving the bioavailability of parent compounds [18,19] or providing oxygen to improve the aerobic conditions [20].…”