强化反硝化条件下地下水中阿特拉津的生物降解研究  

Study on Atrazine Biodegradation under Intensified Denitrifying Conditions in Groundwater

作　　者：李慧芳[1] 张兰英[1] 刘娜[1] 

机构地区：[1]吉林大学环境与资源学院,长春130026

出　　处：《重庆环境科学》2003年第7期7-9,共3页Chongqing Environmental Science

基　　金：自然科学基金资助项目(49872083);水资源与水环境问题重点实验室资助项目

摘　　要：利用所筛选的(从吉林市农药厂下水污泥中分离得到)实验菌种A1,在强化反硝化的厌氧条件下进行阿特拉津的降解实验研究,研究结果表明:降解的最适条件为pH=7,温度为20℃,NO_3^-浓度为30mg/L(当阿特拉津浓度为29.89mg/L时),菌的初始接种量为5.6×10~6个/mL。模拟温度为10℃的地下水环境,21天内菌对阿特拉津的降解率可以达到65.7%,虽然低于好氧条件下83.6%的降解率,但不需要向地下水中通氧,从而可降低处理成本。With the screened microorganisms (isolated from limbers of Jilin pesticide factory ) A1, we carried the degradation test of atrazine,we found that Al can biodegrade atrazine under anerobic conditions. The most suitable condition is:pH = 6. 5- 8; temperature is 20 C , concentration of NO3- : 30mg/L(when the concentration of atrazine was 29. 89mg/L), the original inoculation amount of Al is 5. 6× 106个/ml; When combined with groundwater condition (temperature 10C), the degradation rate of atrazine can reach 65. 7% in 21days. Though it is smaller than the degradation rate of 83. 6% under aerobic condition,but it can reduce the cost by dealing with no oxygen addition.

关 键 词：地下水 阿特拉津 反硝化 生物降解 

分 类 号：X52[环境科学与工程—环境工程]