摘要
采取室内模拟试验方法,研究了滴滴涕（DDT）在武汉地区三种不同土质类型土壤中的吸附和迁移特征。结果表明：DDT在A、B、C三种土壤中的吸附符合线性吸附方程,在24h左右达到平衡,吸附过程为自发的物理吸附,Kd值在0.3~1.41mL/g之间,Kd值大小顺序依次为A种土〉B种土〉C种土;土柱淋溶试验表明一周后DDT在A种土、B种土和C种土中最大迁移深度分别为11.0cm、13.2cm、15.4cm;影响DDT在土壤中吸附的重要因素之一是土壤中有机质含量;土壤中的DDT对地下水污染存在潜在的风险性,应引起高度重视。
This paper studies the characteristics of the adsorption and migration of DDT in three typical kinds of soil in Wuhan area by indoor simulation experiment method. The results show that the adsorption of DDT in the soils is in accordance with linear adsorption model, and achieves a balance in 24 hours. The adsorption process appears to be a type of spontaneous physical adsorption. The adsorption constant （kd） ranges between 0.3-1.41 mL/g, and the order of kd values is A〉B〉C. The soil column experiments show that the migration distance of DDT is different in different kinds of soil, and the migration distance is 11.0 cm in soil A, 13.2 cm in soil B and 15.4 cm in soil C. One important factor that affects the adsorption of DDT in soil is the content of organic matter in soil. The study demonstrates that DDT is one of the potential risks of contaminating groundwater, to which high attention should be paid.
出处
《安全与环境工程》
CAS
2015年第2期49-54,共6页
Safety and Environmental Engineering
