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Advanced Oxidation of Polycyclic Aromatic Hydrocarbons in Soils Contaminated with Diesel Oil at Pilot‐Scale
Author(s) -
Cavalcanti Jorge Vinicius Fernandes Lima,
Fraga Tiago José Marques,
de Lima Valmir Félix,
Dos Santos e Silva Daniella Fartes,
Loureiro Leite Mirella De Andrade,
do Nascimento Clístenes Williams Araújo,
Schuler Alexandre Ricardo Pereira,
da Motta Sobrinho Maurício Alves
Publication year - 2021
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000244
Subject(s) - environmental chemistry , chemistry , hydrocarbon , environmental remediation , mineralization (soil science) , soil contamination , polycyclic aromatic hydrocarbon , diesel fuel , soil water , total petroleum hydrocarbon , total organic carbon , hydrogen peroxide , contamination , environmental science , organic chemistry , ecology , nitrogen , soil science , biology
Diesel‐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 3 3 evidenced that the concentration of iron ions [Fe 2+ ] 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.