硼吸附对针铁矿表面性质的影响  

Effect of Boron Adsorption on Surface Electrochemical Properties of Goethite

作　　者：阎华[1] 黄升谋[1] 

机构地区：[1]襄樊学院,湖北襄樊441053

出　　处：《安徽农业科学》2007年第5期1569-1570,共2页Journal of Anhui Agricultural Sciences

基　　金：湖北省教育厅青年项目资助(2004Q001)

摘　　要：分析了针铁矿吸附硼酸根离子后表面电化学性质的变化及其对体系pH值的影响,并测定了比表面积,讨论了硼吸附后增加针铁矿对H+吸附的可能机制。结果表明,针铁矿吸附硼后,其电荷零点(PZC)下降,且下降幅度随吸附硼量的提高而加大。随着针铁矿吸附硼量的提高,针铁矿的比表面积也明显增大,对H+的次级吸附容量和吸附能力相应增大。Surface changes of the electro-chemical properties of the synthesized goethite were studied after boron adsorption and the secondary adsorption of proton on the surfaces. The results showed that the PZC decreased after the adsorption of boron, and the decrease range rose with the increase of boron adsorption. With the increase of boron adsorption, the capacity and strength of proton adsorption on boron - goethite enhanced correspondingly. The possible mechanisms of the enhanced proton adsorption of goethite after boron adsorption were also discussed in the paper.

关 键 词：硼酸根吸附 针铁矿 H^+吸附 比表面积 

分 类 号：TD861[矿业工程—金属矿开采]