Biodegradation of PAHs in Soil: Influence of Initial PAHs Concentration

Soft Soil Engineering International Conference 2015

Mohd Kamil, Nor Amani Filzah^1 ; Talib, S.A.^2

Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Batu Pahat

86400, Malaysia^1

Institute for Infrastructure Engineering and Sustanable Management, Faculty of Civil Engineering, Universiti Teknologi MARA, Selangor, Shah Alam

40450, Malaysia^2

关键词: Bacterial cultures;    Biodegradation process;    Contaminated soils;    Corynebacterium urealyticum;    Initial concentration;    phenanthrene;    Phenanthrene concentration;    Polycyclic aromatic hydrocarbons (PAHS);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/136/1/012052/pdf
DOI  :  10.1088/1757-899X/136/1/012052

来源: IOP

【 摘 要 】

Most studies on biodegradation of Polycyclic Aromatic Hydrocarbons (PAHs) evaluate the effect of initial PAHs concentration in liquid medium. There are limited studies on evaluation in solid medium such as contaminated soil. This study investigated the potential of the bacteria, Corynebacterium urealyticum isolated from municipal sludge in degrading phenanthrene contaminated soil in different phenanthrene concentration. Batch experiments were conducted over 20 days in reactors containing artificially contaminated phenanthrene soil at different concentration inoculated with a bacterial culture. This study established the optimum condition for phenanthrene degradation by the bacteria under nonindigenous condition at 500 mg/kg of initial phenanthrene concentration. High initial concentration required longer duration for biodegradation process compared to low initial concentration. The bacteria can survive for three days for all initial phenanthrene concentrations.