摘要
采用了从农药厂阿特拉津生产车间排污口污泥中分离出的菌种AT菌 ,进行了农药阿特拉津的静态降解实验及其污染地下水的微生物治理模拟实验研究 .结果表明 ,AT菌在 pH值为 5 0～ 1 0 0时对农药污染质阿特拉津均具有降解能力 ,且适宜的 pH值范围为 6 5～ 8 0 ;在实验条件 (t=1 0℃ ,pH =7 5 )与野外含水层的条件基本一致情况下 ,难于生物降解的污染质阿特拉津的一次投菌降解率达到 31 0 8% ;同时环境因素也随着AT菌作用的变化而变化 ,其中 ,DO、pH随AT菌作用加强而其值减小 .另外 ,设计了细菌的投放方式以模拟野外条件下的菌种投加条件 .并且AT菌的作用会造成被治理含水层的渗透性能降低 ,实验后含水层的渗透系数下降 6 0 5 4 % .清水冲洗 1 0d的渗透性恢复率为 4 8 96 % ,说明清水渗透恢复的方法效果明显 .
The experimental research on the static degradation and treatment of groundwater contaminated by herbicide atrazine was conducted by using bacterium AT which was isolated from the sludge outlet of workshop of the pesticide factory. And the result indicated that bacterium AT had the ability of degradation of atrazine with pH ranged from 5.0 to 10.0, and the optimum extent was 6.5～8.0. The experimental conditions (pH=7.5,t=10℃) were similar to that of the aquifer in study area. Then the rate of degradation of atrazine was up to 31.08% for one addition of bacterium AT. And the environmental factors changed simultaneously in the course of experiment such as DO, pH and etc. decreasing with the reducing of concentration of bacterium AT. In addition, a mode of dropping bacteria was designed to simulate the condition of throwing bacteria in field. And the permeability of aquifer decreased 60.54% after treatment and the renewals were 48.96% after washing with clean water for 10 days, which indicated the method of renewal is effectual.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第6期144-147,共4页
Environmental Science
基金
国家自然科学基金项目 (49872 0 83)
关键词
地下水
阿特拉津污染
微生物治理
环境因素
模拟实验
含水层渗透性
pesticide pollutant
groundwater
bioremediation
environmental factors
simulation experiment
permeability of aquifer
