Enhanced dissipation of polycyclic aromatic hydrocarbons in the presence of fresh plant residues and their extracts.
The feasibility of using fresh plant residues and their extracts to stimulate the bio-dissipation of polycyclic aromatic hydrocarbons (PAHs) were highlighted. Wood chip, bamboo leave, orange peel and their water-extractable organic matter (WEOM) were chosen as amendment materials. Effect of WEOM on bio-dissipation (bioaccumulation and biodegradation) of phenanthrene and pyrene from water by two bacteria were investigated. Orange peel extract demonstrated the highest efficiency for stimulating PAHs removal by bacterium B1 (Pseudomonas putida), while bamboo leave extract was the best one to enhance PAHs bio-dissipation by bacterium B2 (unidentified bacterium isolated from PAHs-contaminated soil). Amended the actual contaminated soil with 1% plant residues, PAHs dissipation were increased by 15-20%, 20-39%, 14-24%, 12-23% and 17-26%, respectively, for 2-, 3-, 4-, 5- and 6-ring PAHs via stimulating indigenous microbial degradation activity. Bamboo leave exhibited the most effective one to stimulate dissipation of PAHs in contaminated soil.
Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China. blchen@zju.edu.cn
Baoliang
B
Chen
Miaoxin
M
Yuan
D052918:Environmental Restoration and Remediation / Q000379:methods; D010936:Plant Extracts / Q000032:analysis / Q000737:chemistry*; D010944:Plants / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000737:chemistry*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
D010936:Plant Extracts; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants