Abstract
Understanding the volatilization properties of gasoline components in soils is of fundamental importance in the field of geoenvironments. A series of experiments were performed to investigate the effects of temperature, soil water content, soil organic matter content, as well as mean particle size on volatilization rate of total petroleum hydrocarbons (TPH) and the paraffin (n-paraffin and isoparaffin), olefin, naphthene, and aromatic (PONA) components in four typical Japanese soils. The results of this study can be summarized as follows. (1) Volatilization rate of gasoline in a soil is concentration-dependent; extensive volatilization occurs above a certain threshold, while volatilization becomes very slow below this threshold. (2) Compared to other factors, temperature and soil organic matter content have greater effects on volatilization rate of gasoline in soils. The volatilization rate is proportional to temperature, but inversely related to soil organic matter content. (3) The characteristics of time-dependent decreases of TPH and PONA components in soils are similar. The volatilization rate of olefin is higher than those of other components. In addition, volatilization of olefin is also more sensitive to temperature as well as organic matter content.
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Acknowledgments
The authors wish to acknowledge the financial support of the Ministry of the Environment, Japan. We are also grateful to Ms. Keiko Ogawa of AIST, Japan, for assistance with experiments and analyses.
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Nishiwaki, J., Kawabe, Y., Sakamoto, Y. et al. Volatilization properties of gasoline components in soils. Environ Earth Sci 63, 87–95 (2011). https://doi.org/10.1007/s12665-010-0671-7
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DOI: https://doi.org/10.1007/s12665-010-0671-7