The Biodegradation Of Benzene In The Soil-water System Under The Denitrification Condition

In 1980s, benzene was found degraded under some anaerobic conditions. Although many studies suggested that benzene can be degraded in several sediments, the metabolism of benzene is not clearly. Even some experts think the benzene is recalcitrant in the nitrate reducing conditions. In China, some waters and soil are contaminated by the benzene. So it is necessary to study the biodegradation of benzene under anaerobic condition.Using the microcosms, we studied the possibility of the benzene biodegradation under denitrifying conditions. We also studied the effects of only or both existing NO₃^- - N and NO₂ - N to the degradation of benzene. Besides above, we studied the effects of organic carbon to the degradation of benzene. Though these experiments, we had the conclusions: the biodegradation of benzene was microorganism activities;when NO₃^- - N , NO₂^- - N or organic carbon existing in the microcosms, biodegradation was speeded up;with increasing the concentration of NO₃^- - N, NO₂^- - N or organic carbon, the biodegradation of benzene was also accelerating;increasing the beginning concentrations of benzene enhanced the benzene biodegradation.