新鲜植物残体及其提取物存在下多环芳烃的增强耗散。
Enhanced dissipation of polycyclic aromatic hydrocarbons in the presence of fresh plant residues and their extracts.
机构信息
Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China.
出版信息
Environ Pollut. 2012 Feb;161:199-205. doi: 10.1016/j.envpol.2011.10.030. Epub 2011 Nov 22.
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.
利用新鲜植物残渣及其提取物刺激多环芳烃（PAHs）生物降解的可行性得到了强调。选择木屑、竹叶、橙皮及其可提取的水相有机质（WEOM）作为改良材料。研究了 WEOM 对两种细菌从水中生物降解（生物积累和生物降解）菲和芘的影响。橙皮提取物对细菌 B1（假单胞菌）去除 PAHs 的效率最高，而竹叶提取物对细菌 B2（从多环芳烃污染土壤中分离出的未鉴定细菌）增强 PAHs 生物降解的效果最好。用 1%的植物残渣改良实际污染土壤后，通过刺激土著微生物降解活性，分别使 2 环、3 环、4 环、5 环和 6 环 PAHs 的降解率提高了 15-20%、20-39%、14-24%、12-23%和 17-26%。竹叶对污染土壤中 PAHs 的降解有最有效的促进作用。
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