Abstract
AbstractDiesel‐contaminated soil was treated with Fenton's oxidant, from hydrogen peroxide. Soil samples were collected during the earthmoving of RNEST Oil Refinery (Petrobras). A factorial design 33 evidenced that the concentration of iron ions [Fe2+] was the variable with the most statistically significant effect in all experiments. The oxidation efficiency was found to be 57 % of total organic carbon (TOC) and 78 % of polycyclic aromatic hydrocarbon (PAH) removal. Moreover, the sum of low‐molecular‐weight PAHs on treated soil and the sum of high‐molecular‐weight PAHs was determined. Soil remediation in a pilot‐scale reactor led to a reduction of nearly 80 % in total PAHs. Toxicity assessment with Californian red earthworms as bioindicator evidenced the mineralization of PAHs.
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