Sorption Separation of Pairs of Elements with Similar Properties Pd(Ⅱ)-Pt(Ⅳ) and Pd(Ⅱ)-Cu(Ⅱ) Using Chemically Modified Silica Containing Sulfide Sulfur
The adsorption of Pd(Ⅱ), Pt(Ⅳ) and Cu(Ⅱ) in static and dynamic conditions on chemically modified silica containing sulfide sulfur (number of grafted functional groups of the sorbent was 0.2 (CMS-S 0.2) and 0 3 mmol/g (CMS-S 0.3)) was studied. It is established that an increase in the acidity of the sorption of Pd(Ⅱ) and Pt(Ⅳ) decreases, whereas the Cu(Ⅱ) does not change. Time to reach the constant values of the sorption is 15 min.In equal conditions, the sorption decreases in the number of Pd(Ⅱ)>Pt(Ⅳ)>Cu(Ⅱ). Based on retrieved data suggested that the sorption of Pd(Ⅱ) proceeds according the coordination mechanism. In the case of sorption fromsolutions with a high palladium content can be polymerization of adsorbed complexes in the sorbent phase. Worked out the optimal conditions for the separation of pairs of Pd(Ⅱ)-Pt(Ⅳ) and Pd(Ⅱ)-Cu(Ⅱ) under dynamic conditions with the extraction of palladium(Ⅱ) in the eluate is above 95％.
Keywords: sorption palladium platinum copper sorbent separation chelation desorption.
BORYAGINA I. V VOLCHKOVA E. V BUSLAEVA T. M LOBANOVA U. A EHRLICH G. V
OJSC SIC Supermetal, Moscow, Russia Moscow State University of Fine Chemical Technology named after M.V. Lomonosov (MITHT), Moscow, Russ Moscow State University (MSU), Moscow, Russia
国际会议
5th International Conference Platinium Metals(第五届国际贵金属会议)
昆明
英文
45-47
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）