Increase in removal of polycyclic aromatic hydrocarbons during bioremediation of crude oil-contaminated sandy soil.
A 23 full factorial experimental design was adopted to estimate the effects of three variables on the biodegradation of oil during soil bioremediation: bioaugmentation seeding a mixed culture, addition of fertilizer or mineral media, and correction of initial pH of the soil to 7.0. The tests were carried out in polyvinyl chloride reactors with 5.0 kg of crude oil-contaminated soil at 14 g/kg. After screening the variables, soil bioremediation tests were conduced with varied C:N ratios, yielding an increase in biodegradation of the oil heavy fraction from 24 to 65%, consumption of total n-paraffins, and a remarkable decrease in the concentration of residual polycyclic aromatic hydrocarbons of the soil.
Oliveira
Fernando J S
FJ
Departamento de Engenharia Bioquímica, Escola de Química, Centro de Tecnologia, Universidade Federal de Rio de Janeiro, Ilha do Fundâo, Rio de Janeiro, RJ, Brazil, CEP 21949-900.
de França
Francisca P
FP
D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D018920:Coculture Techniques; D020650:Combinatorial Chemistry Techniques / Q000379:methods*; D003198:Computer Simulation; D005658:Fungi / Q000378:metabolism*; D008954:Models, Biological; D010578:Petroleum / Q000382:microbiology*; D011084:Polycyclic Aromatic Hydrocarbons / Q000302:isolation & purification / Q000493:pharmacokinetics*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000302:isolation & purification / Q000493:pharmacokinetics*
D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants