摘要
实验制备了新生态MnO2悬浊液并测定了其性质;从吸附动力学、等温吸附、pH值和离子强度等几个方面,探讨了新生态MnO2悬浊液对水中As(Ⅲ)去除作用的机理.结果表明:新生态MnO2对As(Ⅲ)去除过程符合二级动力学方程;pH=6.5时等温线符合Langmuir和Frundlich方程.pH值影响因素的研究表明,新生态MnO2对As(Ⅲ)吸附只是和体系的pH值有关,而与H3AsO3的pKa无关的非特性吸附.
The nascent manganese dioxide suspension was prepared. The mechanism of the removal of As（ Ⅲ） from water by nascent MnO2 suspension was studied by kinetics, adsorption isotherm, and pH. The results revealed that the date of adsorption of As（ Ⅲ ） on the nascent MnO2 at room-temperature was fit two-order rate equation. In a solution of pH = 6.5 Langumiur and Fundlich model can simulate to the adsorption equilibruim. The results of pH value effects showed that it was not characteristic adsorption relation to pKa of H3AsO3.
出处
《河北大学学报（自然科学版）》
CAS
北大核心
2005年第5期515-519,共5页
Journal of Hebei University(Natural Science Edition)
基金
河北省教育厅科学基金资助项目(04106)
关键词
新生态MNO2
悬浊液
As(Ⅲ)
动力学方程
等温吸附
特性吸附
nascent manganese dioxide
suspension
As （Ⅲ ）
kinetics equation
adsorption isotherm
characteristic adsorption
