Application of immobilized microorganism technology on soil remediation of farmland in Xiaoqinling gold mining area
In order to explore new methods of soil pollution prevention,the application of immobilized microorganism technology in soil ecological remediation was studied.The heavy metal contents in the soil of Xiaoqinling gold mining area and the surrounding farmland in Western Henan Province were determined and evaluated,it was found that the risk of Pb2+element pollution in the soil in this area was high.The mixed bacteria of Bacillus laterosporus,actinomycetes and yeast were immobilized to carry out soil bioremediation in situ,the results showed that the urease activities of soil treated with immobilized bacteria were significantly higher than that of CK.In order to improve the passivation efficiency and removal rate of Pb2+,the single factor test and response surface methodology were used to analyze the factors affecting the soil remediation effect,the optimal removal conditions of Pb2+were determined finally:the dosage of immobilized mixed bacteria was 10.496%,the treatment temperature was 30.784℃,the pH value was 6.242,and the theoretical removal rate of Pb2+was 72.754% .The model was verified by experiment,the result of experiment was close to the theoretical value,indicating that response surface analysis can optimize the soil remediation experimental parameters.
万方数据
维普
