DEGRADATION OF ORGANIC VAPORS IN UNSATURATED SOILS

被引：20

作者：

ENGLISH, CW

LOEHR, RC

机构：

[1] Environmental and Water Resources Engineering Program, Department of Civil Engineering, University of Texas Austin, Austin

来源：

JOURNAL OF HAZARDOUS MATERIALS | 1991年 / 28卷 / 1-2期

关键词：

D O I：

10.1016/0304-3894(91)87005-M

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To predict the fate of volatile organic compounds (VOCs) in unsaturated soil, it is necessary to understand the physical and chemical processes that occur in the soil system. Two important removal mechanisms of organic vapors in soil are sorption and biodegradation. Modeling efforts to describe the removal of organic vapors in soil require constitutive relationships that are developed from laboratory data. This paper reports measurements of removal coefficients for three VOCs in a fine sandy loam soil. Sorption coefficients and degradation removal rates were determined from batch reactors for three compounds: benzene, trichloroethylene (TCE) and o-xylene. Results indicate organic vapors are sorbed and then removed by biodegradation in the unsaturated soil system. This information has potential for use in the bioremediation of soils contaminated with VOCs and for impacting decisions on air emissions, regulatory limits and on-site controls.

引用

页码：55 / 63

页数：9

共 24 条

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