Abstract
BackgroundOne of the most important environmental problems is the decontamination of petroleum hydrocarbons polluted soil, particularly in the oil-rich country. Bioremediation is the most effective way to remove these pollutants in the soil.Spent mushroom compost has great ability to decompose lignin-like pollution. The purpose of this study was the bioremediation of soil contaminated with crude oil by an Agaricomycetes.MethodsSoil sample amended with spent mushroom compost into 3%, 5% and 10% (w/w) with or without fertilizer. Ecotoxicity germination test was conducted with Lipidium sativa.ResultsThe amplified fragment (18 s rDNA) sequence of this mushroom confirmed that the strain belonged to Pleurotus ostreatus species with complete homology (100% identity). All tests experiment sets were effective at supporting the degradation of petroleum hydrocarbons contaminated soil after three months. Petroleum contaminated soil amended with Spent mushroom compost 10% and fertilizer removed 64.7% of total petroleum hydrocarbons compared control. The germination index (%) in ecotoxicity tests ranged from 60.4 to 93.8%.ConclusionsThis showed that the petroleum hydrocarbons contaminated soil amended with 10% Spent mushroom compost had higher bioremediation ability and reduced soil toxicity in less than three months.
Highlights
One of the most important environmental problems is the decontamination of petroleum hydrocarbons polluted soil, in the oil-rich country
All tests experiment mixtures were effective at supporting the degradation of petroleum hydrocarbons contaminated soil, while the control was not
Statistical analysis indicated a significant difference at P < 0.001 between the experimental set A-F and control pot, proving the efficient role of Spent Mushroom Compost (SMC) to the mycoremediation of petroleum hydrocarbons contaminated soil
Summary
One of the most important environmental problems is the decontamination of petroleum hydrocarbons polluted soil, in the oil-rich country. Bioremediation is the most effective way to remove these pollutants in the soil. The purpose of this study was the bioremediation of soil contaminated with crude oil by an Agaricomycetes. Contamination of soil by petroleum hydrocarbons is a serious problem in oil producing counties. Ligninolytic fungi (white rot fungi) are able to degradation of petroleum hydrocarbons by extracellular lignin modifying enzymes. These enzymes have very low substrate specify, Mohammadi-Sichani et al Journal of Environmental Health Science & Engineering (2017) 15:8 contaminants and have important biotechnology and environmental applications [8, 9]
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