摘要
酸性紫色土对锌的等温吸附 -解吸和动力学试验表明 :锌的等温吸附符合 L angmuir方程 ,最大吸附量为15 3.8mg/kg土。钙、硼与锌复合 ,均降低土壤锌的最大吸附量及结合常数 K。所吸持的锌的解吸量和解吸率小 ,钙和硼均降低了锌的解吸率。土壤吸附锌的动力学以 Elovich方程 (Ct=a+blnt)描述最佳 ,反映土壤对锌吸附速率大小的方程参数 b值以 Zn>Zn+Ca+B>Zn+B>Zn+Ca。
Results of thermostatic adsorption and desorption experiments indicated that adsorption of Zn by soil was fitted by Langmiur equation. The adsorption maximum of the sample soil were 153.8 mg/kg. Ca and B tended to decrease adsorption of Zn and constant K. The amounts and rates of Zn desorption from soil were small, and Ca, B decreased the rates of Zn desorption both. The adsorption kinetics of Zn could be described with Elovich Equation. The constant b for different treatments was Ca+B>Ca+B+Zn>Ca>Ca+Zn .
出处
《重庆环境科学》
北大核心
2003年第8期15-17,24,共4页
Chongqing Environmental Science
基金
重庆市科委应用基础研究项目的部分内容 (96- 4 348)
关键词
锌
钙硼复合
热力学
动力学
Zinc
Calcium-Boron interactions
thermostatics
kinetics
