【摘要】 将引进菌用于有机污染土壤中芘和苯并(a)芘的生物修复,目的是使引进菌在环境工程中的利用成为可能.通过对引进的3株细菌进行固定化包埋,研究了它们对土壤中芘和苯并(a)芘的降解效果.结果表明,引进菌驯化固定后,无论是单株菌还是混合菌对污染物的降解都明显高于游离菌,与土著固定菌相比,部分引进菌具有一定的优势.通过不同时间采样点的对比分析可以看出,引进菌混合固定后对污染物的降解效果相对较好,在96h时B61B67对芘和苯并(a)芘的降解率分别为43·49%和38·55%.更多还原

【Abstract】 In this study, introduced bacteria were applied in the bioremediation of pyrene and benzo(α)pyrene in organic pollutants-contaminated soils, aimed to test whether it was feasible to introduce bacteria to environmental engineering. Three introduced bacteria were immobilized separately or together to degrade the pyrene and benzo(α)pyrene in soil, taking dissociated bacteria as the control, and comparing with three indigenous bacteria. The results showed that immobilized introduced bacteria, either single or mixed, had higher degradation efficiency than dissociated bacteria. Compared with indigenous bacteria, some introduced bacteria had predominance to some degree. The introduced bacteria-mixture had better degradation efficiency after being immobilized. The degradation rate of pyrene and benzo(α)pyrene after treated with immobilized bacteria-(B61-B67)-mixture for 96 hours was 43.49% and 38.55%, respectively.更多还原