Using frontal affinity chromatography to study how silver binds with particulates  

作　　者：CAI Yurong 

机构地区：[1]State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences Guiyang 550002, China

出　　处：《Chinese Journal Of Geochemistry》2010年第3期242-245,共4页中国地球化学学报

基　　金：the National Natural Science Foundation of China (Grant Nos. 40525011 and 40632011);the Chinese Academy of Sciences (kzcx2-yw-102);the International Cooperation Project of CAS for their financial support

摘　　要：Frontal affinity chromatography was applied to characterizing the mechanism of binding of silver with sediment particulates collected from Lake Ontario, Canada. The results showed that there was one major binding site for Ag+ in the particulates. The binding capacity ranges from 6.06 to 1.01 μ·mol·g-1, and the binding constant (lgK) from 6.23 to 7.43 M-1 in 0.005 M ion strength at pH=3-7. The binding capacity and affinity constant were found to be pH-dependent. It is suggested that the particulate surface site where silver was bound was the anionic base. This study would be helpful for better understanding of the fundamental environmental chemistry of silver in sediments.Frontal affinity chromatography was applied to characterizing the mechanism of binding of silver with sediment particulates collected from Lake Ontario, Canada. The results showed that there was one major binding site for Ag^＋ in the particulates. The binding capacity ranges from 6.06 to 1.01 μ·mol·g-^1, and the binding constant （lgK） from 6.23 to 7.43 M^-1 in 0.005 M ion strength at pH=3-7. The binding capacity and affinity constant were found to be pH-dependent. It is suggested that the particulate surface site where silver was bound was the anionic base. This study would be helpful for better understanding of the fundamental environmental chemistry of silver in sediments.

关 键 词：亲和层析法 银粒子 结合能力 化学沉积物 安大略湖 泥沙颗粒 结合位点 结合常数 

分 类 号：TQ464.8[化学工程—制药化工] TQ171.734