【摘要】 芳香烃污染地下水以其污染普遍、危害巨大、去除困难及治理费用昂贵而倍受各国环境学者及水文地质学者的关注。以苯及甲苯作为标示污染物，利用室内饱水含水层土柱，通过对污染带的模拟实验发现，苯和甲苯在反硝化条件下产生生物降解，二者的去除率分别大于７７％和８８％；反硝化条件下，苯和甲苯显示出降解性差异，甲苯更易于降解；硫酸还原作用可能是苯和甲苯被去除的另一机理，但实验结果显示，ＮＯ－３高时，对硫酸还原菌的生长具有抑制作用。更多还原

【Abstract】 Groundwater contamination by aromatic hydrocarbons occurs worldwide and the removal of the pollutants from groundwater is very expensive. A series of simulation tests, in which benzene and toluene are used as model pollutants, are conducted in laboratory aquifer column. The results of the experiment suggest that benzene and toluene may be removed from the water flowing through the aquifer column, and the removal rate is higher than 77 percent for benzene and 88 percent for toluene under denitrification conditions respectively.There are differences in the removal rates between benzene and toluene. In addition, sulfate-reduction may be the other mechanism contributing to the removal of benzene and toluene from the water, but high concentration nitrate will inhibite the occurrence of sulfate-reduction bacteria.更多还原