Simulation Study of Atrazine-contaminated Soil Biodegradation by Strain W16

This paper studies the biodegradation of the atrazine-contaminated soil by the strain W16 (Rhodobacter sphaeroides sp.) under simulation conditions and analyzes the impacting factors of repairing process of atrazine-contaminated soil. The results show adding strain W16 can promote the degradation of atrazine in soil. W16s atrazine-degrading and W16 inoculation amount show positively correlated. When the inoculation amount of W16 was reduced to 1.2×105 cfu·g−1 soil, the strain W16s degradation ability of atrazine obviously weakened. The optimum temperature for strain W16 degradation atrazine in soil was 30°C and W16s atrazine-degrading rate on the 15th day was 96.86%. W16s atrazine-degrading rate in soil improved with the soil moisture content increase .When the soil moisture was 10%, the strain W16s atrazine-degrading ability was inhibited .While soil moisture content was more than 20%, atrazinedegrading rate was higher than 74.09% on the 15th day.