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Importance of Organic Matter to the Retention and Transport of Bisphenol A and Bisphenol S in Saturated Soils

Shi, Yanfeng, Sun, Yuanyuan, Gao, Bin, Xu, Hongxia, Wu, Jichun
Water, air, and soil pollution 2019 v.230 no.2 pp. 43
bisphenol A, bisphenol S, groundwater, kinetics, mathematical models, public health, soil, soil organic matter, sorption, China
Bisphenol A (BPA) and bisphenol S (BPS) are frequently detected in soils and groundwater, which may pose threats to public health and the environment. However, the fate and transport of BPA/BPS in the subsurface media are still not clear. In this study, the retention and transport of BPA/BPS in three different natural soils were investigated with column experiments and mathematical modeling. The results showed that both BPA and BPS had high mobility in saturated soil A (Xinjiang soil), medium mobility in soil B (Changshu soil) media, and no mobility in the soil C (Jilin soil). There was a negative correlation between the mobility of BPA/BPS and soil organic matter (SOM) content because of the strong sorption of BPA/BPS on SOM. BPS showed higher mobility than BPA in the three soils. In addition, with the reduction of SOM of the soil B and C (after H₂O₂-treatment), the mobility of BPA/BPS enhanced dramatically. All these suggest that SOM played a significant role in controlling the retention and transport of BPA/BPS in the soil. Furthermore, the two-site kinetic model simulated the BPA/BPS transport experiment results very well.