Approaches for bioremediation of pesticide contaminated soil: complex pollution problems

Abstract

A strongly pollution with trifluralin and DDT of soil samples collected nearby an old pesticides storehouse was revealed. Two main approaches of treatment were used to remediate this complex contamination – creation strictly anoxic conditions, and alternating anoxic and oxic conditions. In both cases, trifluralin content in soil decreased by more than 4 times and degradation rate reached 95-96%. The cycled anoxic and oxic treatment of soil amended with phosphates and peptone, promoted the DDT and DDTs degradation in compare with the anoxic treatment. The prolongation of the experiment in aerobic conditions resulted in complete mineralization of DDT.