氯化钠对百草枯在活性炭上体外吸附的增强作用。

Enhancing effect of sodium chloride on in vitro adsorption of paraquat onto activated carbon.

作者信息

Tanada S, Nakamura T, Xiaohong M, Higuchi T, Miyoshi T, Tamura T, Imaki M

机构信息

Faculty of Pharmaceutical Sciences, Kinki University, Osaka.

出版信息

Nihon Eiseigaku Zasshi. 1992 Feb;46(6):1051-6. doi: 10.1265/jjh.46.1051.

DOI:10.1265/jjh.46.1051

PMID:1556828

Abstract

The enhancing effect of sodium chloride addition on the adsorption of paraquat onto activated carbon was discussed from the standpoints of equilibrium amount adsorbed and adsorption rate in vitro. The amount of paraquat adsorbed was increased by the addition of sodium chloride. The amount adsorbed with 0.1% addition was about five times greater than that in sodium chloride-free solution at an equilibrium concentration of 1 mg/L. The adsorption rate of paraquat onto activated carbon was also accelerated by sodium chloride addition. Kinetic constants in 0.1% and 0.9% sodium chloride solution were about 1.4 and 2.0 times greater, respectively, than that in sodium chloride-free solution. It was confirmed that paraquat removal by activated carbon was enhanced by sodium chloride addition. The reason was assumed to be the interrupted dissociation of paraquat in solution caused by sodium chloride addition.

摘要

从体外平衡吸附量和吸附速率的角度，探讨了添加氯化钠对百草枯在活性炭上吸附的增强作用。添加氯化钠后，百草枯的吸附量增加。在平衡浓度为1mg/L时，添加0.1%氯化钠的吸附量约为无氯化钠溶液中的五倍。添加氯化钠也加速了百草枯在活性炭上的吸附速率。在0.1%和0.9%氯化钠溶液中的动力学常数分别约为无氯化钠溶液中的1.4倍和2.0倍。证实了添加氯化钠可增强活性炭对百草枯的去除效果。推测其原因是添加氯化钠导致溶液中百草枯的解离受到抑制。