Studies on the Bioremediation Actions of 4-Chloroaniline on Wetland Soil

Chloroanilines are toxic substances listed as typical pollutants of the environment. The photolysis in sunlight is a possible route for it elimination. The photolysis rate constant of p-chloroaniline(p-CA) in pure water and in wetland soil(C) was about 0.1059 d^-1 and 2.98 times 10^-3d^-1 with a half-life was 6.55d and 232.58d. Degradation rate coefficient of p-CA in sterilized (A) and Non-sterilized (B) was 8.347 times 10^-3 and 3.46 times 10^-3, degradation half-life was 830.39d and 200.32d. respectively, indicating that microorganisms would accelerate the the degradation of p-CA. A bacterium capable of growing with p-CA as sole carbon and energy sources was isolated from rhizosphere soil in phragmites wetland by enrichment culture method. The degradation temperature and pH value for degradation were about 30degC and pH 7.0, for 4d in minimal medium culture fluids at vaccination of 10%.