The process of benzo (a) pyrene loss in various soils
1994
Sakamoto, K. (Chiba Univ., Matsudo (Japan). Faculty of Horticulture) | Takeuchi, S. | Yoshida, T.
We carried out an experiment to examine the process of benzo (a) pyrene loss in various soils. The soils used were Entisols, Inceptisols and Alfisol with different physicochemical properties. Each soil was spiked with 10 micron-g g(-1) benzo (a) pyrene and incubated at 25 degrees C for 100 days. The content of benzo (a) pyrene in soils were measured periodically. The experiment was also conducted in the autoclaved soil. About 80% of the benzo (a) pyrene loss was caused by evaporation, and about 20% by biodegradation. The highest loss of benzo (a) pyrene by evaporating was observed in Alfisol followed by Inceptisols and the lowest in Entisols. The rate of benzo (a) pyrene loss was positively related to the surface area and gaseous phase ratio of the soil, suggesting that the physical structure of soil controls the rate of benzo (a) pyrene loss
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