摘要
采用平衡振荡法研究对氯苯胺(PCA)在盐城湿地土壤中的吸附解吸过程,湿地土壤吸附动力学表明在1h之内吸附符合幂函数方程(qt=96.168t0.2158),1h后符合二级动力学方程(1/ct=0.06+0.0012t)。其解吸动力学过程的最优模型为幂函数方程(qt=14.585e0.2318t)。吸附等温线符合Freundlich方程(cs=21.38ce0.78)其吸附常数Kd=21.38,对土壤粒子有较大的亲和力。研究还发现PCA在湿地土壤中的吸附量与溶液pH值(pH值5～8)呈正相关,与溶液离子强度呈负相关。
The adsorption and desorption course of p-Chloroaniline（PCA） on the wetland soil in Yancheng City were studied in this article. The results showed that power function equation（qt=96.168t^0.2158）and secondary equation（1/ct=0.06＋0.001 2t）were the best models for PCA adsorption on the soil in the first hour and one hour later,respectively. Power function equation （qt=14.585e^0.2318t）was the best models for PCA desorption. Adsorption isotherm of PCA on the soil was nonlinearity which could be described by Freundlieh equation （cs=21.38ce^0.78）, adsorption equilibrium constant （Ka） was 21.38. The influence of the ionic strength and solution pH value on the adsorption of p-Chloroaniline also was researched. The results showed that adsorption was positively related to solution pH（pH=5-8）, and was negatively related to ionic strength.
出处
《湖北农业科学》
北大核心
2009年第4期838-841,共4页
Hubei Agricultural Sciences
基金
国家自然科学基金项目(20607018)
江苏省自然科学基金项目(BK2006063)
关键词
对氯苯胺
吸附
解吸
湿地土壤
p-Chloroaniline
adsorption
desorption
wetland soil
