重金属污染土电阻率影响因素的试验研究  

The orthogonal experiment research of influence factor for resistivity of heavy metal contaminated soils

作　　者：叶萌[1] 李韬[1] 许丽萍[1] 王蓉[1] 

机构地区：[1]上海岩土工程勘察设计研究院有限公司,上海200023

出　　处：《土木建筑与环境工程》2016年第S1期135-140,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：上海市科学技术委员会科技攻关项目(13231202300)

摘　　要：为探究重金属污染物浓度、含水率、土类型等因素对重金属污染土电阻率的影响,为电阻率法在重金属污染场地中的应用提供理论依据,采用标准的3因素3水平的正交试验表制定试验方案进行正交试验,为了更加明确三因素对土电阻率的影响,进行不同类型土分别在不同重金属污染物浓度和不同含水率下的土电阻率测试试验,用自制室内电阻率测试装置进行测试。结果表明:在软土地区,当土体受重金属污染时,影响重金属污染土电阻率变化的主次因素依次是重金属污染物浓度、含水率、土的类型。土的电阻率随着含水率的增加而呈指数减小,重金属污染土的电阻率随着重金属污染物浓度的增加而呈指数减小,在同一超标倍数下,不同类型土电阻率变化率由大到小的顺序为:粉质粘土﹥淤泥质粉质粘土﹥淤泥质粘土。To explore concentration of heavy metal pollutants,soil water content and soil type on the influence of resistivity of soil contaminated by heavy metal,the orthogonal test was completed according to the orthogonal test plan of 3factors and 3levels,,in order to make the influence of three factors on the resistivity more clearly,multiple sets of resistivity testof soil of different concentration of heavy metal pollutants and different soil water content were completed,self-made indoor resistivity test device was used for testing.The results show that,in soft soil area,when the soil was contaminated by heavy metal pollutants,the primary influence factor of the resistivity of soil contaminated by heavy metal was the concentration of heavy metal pollutants,and the secondary factor was the soil water content,the last is soil type.,The resistivity of soils contaminated by heavy metal decreases exponentially with concentration of heavy metal pollutants and the increase of soil water content,under the same exceed standard ratio,the rate of resistivity change of different soil types from big to small were that:silty clay> muddy silty clay>muddy clay.

关 键 词：重金属污染土 电阻率 含水率 土的类型 

分 类 号：X53[环境科学与工程—环境工程] TU411[建筑科学—岩土工程]