標題: Biodegradation of soil-applied polycyclic aromatic hydrocarbons by sulfate-reducing bacterial consortium
作者: Kumar, Mathava
Wu, Pei-Chi
Tsai, Jen-Chieh
Lin, Jih-Gaw
環境工程研究所
Institute of Environmental Engineering
關鍵字: Polycyclic aromatic hydrocarbon;biodegradation;sulfate-reducing bacteria;kinetics study
公開日期: 2009
摘要: In the present study, the potential of polycyclic aromatic hydrocarbons (PAHs) biodegradation by sulfate-reducing bacterial consortium enriched from piggery wastewater was investigated. The batch experiments of soil-applied PAH biodegradation were conducted with a mixture of PAHs, i.e., naphthalene, fluorene, phenanthrene, fluoranthene and pyrene, at a concentration of 50 mu g of each PAH per g of soil. A central composite design (CCD) was applied to determine the experimental conditions of each batch assay. The pH, biomass and ethanol concentrations were selected as independent variables and the PAH removal percentage was considered as a dependent variable. The optimal conditions for PAH biodegradation were found to be a pH between 4 and 6.5, an ethanol concentration less than 35 mg/L and a biomass concentration greater than 65 mg/L. Bench scale experiments were carried out at the optimal conditions. At the end of experiment (27 d), total PAH removals by biodegradation and volatilization were around 74% and 20%, respectively. The order of PAH removal was naphthalene, phenanthrene, fluorene, fluoranthene, and pyrene. Throughout the study, PAH biodegradation was in good correlation with sulfate reduction. Results of the kinetics study indicated a competitive inhibition between PAHs investigated.
URI: http://hdl.handle.net/11536/7810
http://dx.doi.org/10.1080/10934520802515178
ISSN: 1093-4529
DOI: 10.1080/10934520802515178
期刊: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
Volume: 44
Issue: 1
起始頁: 12
結束頁: 20
Appears in Collections:Articles


Files in This Item:

  1. 000261737700002.pdf