摘要
石油污染物进入土壤中后经历一系列物理化学和生物过程,其中发生的挥发过程是一种重要的迁移过程。本文以柴油为石油污染物的代表,研究了温度及土壤质地对柴油挥发行为的影响。通过在不同温度下纯柴油的挥发及柴油从四种不同土质的薄层土壤中的挥发试验,对柴油的挥发量与挥发时间的关系进行了模拟,结果表明:在不同温度下,纯柴油及柴油在四种薄层土壤中的挥发量与挥发时间的关系均可采用二次多项式来拟合。通过对比经相近时间柴油从4种不同土壤表面的挥发后,发现柴油挥发量均大于从纯柴油时的挥发量。在有机质质量分数不同的土壤中进行了柴油挥发试验,结果表明高有机质会抑制土壤中的柴油的挥发。
Oil contaminants undergo a series of complex physical, chemical and biological processes after they enter the soil environment, and the volatilization is an important process. Here the diesel oil is used as the typical oil contaminants for the study of the effects of temperature and the soil texture on the diesel oil volatilization. The volatilization of diesel oil from pure product and four different types of soils at different temperature were carried out. The relationship between the volatilization amount and the time were simulated, and the results indicated that diesel evaporates in a power manner, where the loss of diesel amount were approximately power with time at both of pure diesel product and four thin different types of soil. But there were more diesel oil evaporates from the soil than from pure diesel product through the relatively same time＇s volatilization tests. The influence of organic matter content in soil on diesel volatilization was conducted, and the results showed that the high organic matter in soil can restrain the diesel oil evaporate from the soil.
出处
《生态环境》
CSCD
北大核心
2007年第3期802-806,共5页
Ecology and Environmnet
基金
国家教育部高等学校博士点基金项目(20040423016)
关键词
柴油
挥发
土壤
diesel oil
volatilization
soil
