生物堆模拟法修复苯并[a]芘和二苯并[a,h]蒽污染土壤

Simulated Bioremediation of BaP & DBA Contaminated Soil

采用生物堆模拟方法,研究苯并[a]芘(BaP)和二苯并[a,h]蒽(DBA)污染土壤的生物修复条件。结果表明,在生物堆中投加绿肥或秸秆可明显促进BaP和DBA的降解;通气速率分别为0.05和0.10 m3·h-1时BaP和DBA的降解率无明显差异;添加EM菌对BaP和DBA的降解有抑制作用。在投加20 g·kg-1绿肥、通气速率为0.10 m3·h-1时,BaP和DBA的去除效果最佳,处理160 d时降解率分别达64.8%和74.9%。

Polycyclic aromatic hydrocarbons （PAHs） is very high in toxicity and very persistent in soil. It is, therefore, essential to study conditions for bio-remediation of benzo[a] pyrene （BaP） and dibenzo[a ,h] anthracene （DBA） contaminated soils. It was found that addition of green manure or straw into the bio-pile significantly promoted the degradation of BaP and DBA; aeration from 0. 05 to 0. 10 m^3·h^-1 did not have any significant effect on their degradation; and the addition of EM actually inhibited their degradation ; however, when the addition of green manure was set at 20 g · kg^-1 and the aeration at 0. 10 m^3·h^-1 , the BaP and DBA degradation rate was the highest, reaching up to 64. 8% and 74.9%, respectively after 160 days of incubation.