Liu, Jen-ChyiJen-ChyiLiuTzou, Yu-MinYu-MinTzouLu, Yi-HsienYi-HsienLuWu, Jeng-TzungJeng-TzungWuCheng, Mei-PingMei-PingChengSHAN-LI WANG2018-09-102018-09-102010-05https://www.scopus.com/pages/publications/77949571199?origin=resultslisthttp://scholars.lib.ntu.edu.tw/handle/123456789/356626Rice-straw burning is a common post-harvest practice on rice paddy land, which results in the accumulation of rice-straw ash (RSA) in paddy soil. Because the occurrence of RSA in soil may affect the fate and transport of contaminants, this study investigated the sorption of 3-chlorophenol (3-CP) on RSA and RSA amended soils to evaluate the sorptive properties of RSA in soils. The results showed that the sorption of 3-CP to RSA proceeds through a surface reaction rather than through partitioning and that the neutral form of 3-CP is preferentially sorbed to the surface when compared to the deprotonated anionic form of 3-CP. The addition of RSA to the soils enhanced the overall 3-CP sorption, indicating that RSA amendment may be applied to retard the movement of 3-CP in contaminated soils. As the RSA content in the soils was increased from 0% to 2%, the Langmuir sorption maximum of the soils increased from 18-80 to 256-274mgkg-1. Thus, RSA contributed more to the total sorption of the soils than other major components in the soils. Nonetheless, the 3-CP sorption of the soils containing RSA was less than the combination of pure RSA and the soils, thereby indicating that the 3-CP sorption of RSA was suppressed. This may be attributed to the competition of organic matter or other soil components for the surface binding sites of RSA.Black carbonChlorophenolRice strawSoilsSorption[SDGs]SDG15journal article10.1016/j.jhazmat.2009.12.0862-s2.0-77949571199