The study of Rhodotorula sp. to degradate Nonylphenol in soil

摘要

Rhodotorula sp., one of the common yeast, was able to degradate the Nonylphenol in liquid culture. The effect on degradation of Nonylphenol in soil, and the effect of the co-treating with the aboriginal microorganis was studied under different conditions. The result showed that the proceddion of Nonylphenol degradation in soil fitted the first order reaction kinetices model (the correlation index r2 >0.9), and the degradation rate of adding Rhodotorula sp. in the soil can make the best effect. We also studied the bioremediation of the Nonylphenol-contaminated soil by the Rhodotorula sp‥ At the large density pollutant (44 mg/kg dry soil), adding the Rhodotorula sp. had no obvious intensification on bioremediation, but at the lower density pollutant(2.2∼11 mg/kg dry soil), adding the Rhodotorula sp. obviously increased the degradation rate of Nonylphenol. Therefore, the Rhodotorula sp. is applicable to the bioremediation of polluted soil of low and medium density pollutant.