| Citation: | WANG Xinghua, LI Xiaoqian, XIE Xiaohan, HE Ningjie, YU Hanyu. Impact of soil factors on soil-gas partition coefficient of trichloroethylene[J]. Bulletin of Geological Science and Technology, 2024, 43(5): 272-278. doi: 10.19509/j.cnki.dzkq.tb20240028
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Soil-air partitioning is a critical process influencing the environmental fate of volatile organic pollutants and a significant contributor to the risk of respiratory exposure.
Four typical soils-loess, red soil, black soil and sand were used to identify the soil factors affecting the partitioning of trichloroethylene. The partitioning behaviour of trichloroethylene at the soil-atmosphere interface was quantitatively investigated by single-factor controlled batch experiments, and the quantitative relationship between the trichloroethylene soil gas partition coefficient and soil factors was determined.
The results showed significant differences in the soil-gas partition coefficients of the four typical soils (black soil>red soil>sandy soil>loess soil). The main influencing factors for the partition coefficient of black soil were primarily particle size, water content, and organic matter content. Whereas, for the other three soils, the main factors were particle size and water content.
The relationships between the soil gas partition coefficient of TCE and soil factors in black soil can be quantitatively expressed as follows:
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