摘要
[目的]准确评价土壤四氯化碳的污染程度。[方法]模拟实验采用自行设计的模拟装置,共设计4个土柱,分别填充细砂、深层土壤(深度>3.7m)和浅层土壤(深度<1.2m),底部均为四氯化碳饱和溶液。通过实验室土柱模拟实验,从土壤有机质含量和含水率方面,分析四氯化碳在土壤挥发过程中所受到的影响,总结四氯化碳在挥发过程中的规律。[结果]含水率高的土壤对四氯化碳的吸附高于含水率低的土壤,且水分在四氯化碳穿透土层的过程中具有较强的延滞作用。有机质含量高的土壤对四氯化碳的吸附作用明显高于有机质含量低的土壤,四氯化碳在穿过有机质含量较高的土壤层时所需要的时间较长。[结论]该研究为科学治理四氯化碳污染提供参考依据。
[ Objective ] The study aimed to accurately evaluate the polluting degree of carbon tetrachloride in soil. [ Method ] The simulating test adopted the self-designed simulation equipment in which 4 soil columns were designed to be filled the fine sand, soil in the deep layer at 〉 3.7 m and soil in the shallow layer at 〈 1.2 m with the saturation solution of carbon tetrachloride in base of soil column. The soil column simulation test was made to analyze the effect of soil volatilization process on carbon tetrachloride and sum up the law of carbon tetrachloride in the soil volatilization process according to the organic matter and water content in soils. [ Result] The adsorption on carbon tetrachloride by the soil with high water content was higher than that by the soils with low water content and the water had strong arrearage action during the carbon tetrachloride penetrating through the soil layer. The adsorption of the soil with high organic matter content to carbon tetrachloride was higher than that of the soil with low organic matter content and the carbon tetraehloride needed longer time in penetrating through the soil with high organic matter con-tent. [ Conclusion] The study provided the reference basis for scientifically controlling the carbon tetrachloride pollution.
出处
《安徽农业科学》
CAS
北大核心
2009年第34期17260-17261,17266,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金资助项目(40373044)
关键词
四氯化碳
有机质
含水率
吸附
Carbon tetraehloride
Organic matter
Water content
Adsorption
