不同形态砷在新生态MnO_2界面上的吸附作用  

The Action of Adsorption of Different Form Arsenics on the Nascent Manganese Dioxide Surface

作　　者：梁慧锋[1] 刘占牛[2] 于化江[3] 马子川[1] 刘清福[2] 

机构地区：[1]河北师范大学化学与材料科学学院,河北石家庄050016 [2]邢台学院化学系,河北邢台054001 [3]沧州师范专科学校化学系,河北沧州061001

出　　处：《河北师范大学学报（自然科学版）》2006年第3期318-321,325,共5页Journal of Hebei Normal University：Natural Science

基　　金：河北省教育厅科学研究基金资助项目(2004443)

摘　　要：研究了新生态MnO2对2种形态砷的吸附作用.在相同的实验条件下,As(Ⅴ)的吸附动力学数据符合Langergren二级动力学方程;As(Ⅲ)的吸附数据符合简单级数的二级动力学方程.2种形态砷的吸附过程受pH的影响较大;吸附过程中SO42-,PO43-等阴离子对2种形态砷均有吸附竞争作用;吸附过程不受离子强度的影响.The action of adsorption of arsenics and arsenate on the nascent MnO2 was discussed. The nascent manganese dioxide is high efficient adsorptive material of arsenics in water. At the same condition, the date of adsorption kinetic of As（Ⅴ ） can be well described by the Lagergren second-order rate equation. The As（ Ⅲ ） was accorded with the simple second-order rate equation. The adsorption action of two kinds of As were largely influenced by pH value. During the course of the adsorption, the anion of SO4^2- , PO4^3- et al had a competition function to As（ Ⅴ ） and As（ Ⅲ ） in this system,and the ion strength did not have effect on adsorption.

关 键 词：新生态MNO2 吸附剂 活化能 焓变 吸附竞争 

分 类 号：O613.63[理学—无机化学] O647.3[理学—化学]