大孔膦酸树脂吸附钴离子的性能及其机理

Studies on the Adsorption Behaviors and Mechanism of Macro Porous Phosphonic Acid Resin for Cobalt(Ⅱ)Ions

研究了大孔膦酸树脂对 Co2 +的吸附性能和吸附机理 ;在 p H=3的 HAc- Na Ac缓冲溶液中 ,膦酸树脂对 Co2 + 有一吸附最大值 ;树脂对 Co2 + 的静态饱和吸附容量为 0 .95mmol/g树脂 ;用 2 mol/L的盐酸溶液进行洗脱 ,洗脱效率较高 ;树脂的再生能力较强 ;用化学分析法及红外光谱测定了有关基本参数 ,探讨了磷酸树脂吸附 Co2 + 的机理。

The sorption behaviors and mechanism of macro porous phosphoric acid resin for cobalt(Ⅱ)ion were investigated. Macro porous phosphonic acid resin has the greatest adsorption ability for cobalt(Ⅱ)ion in pH=3 HAc NaAc. The saturated static adsorption capacity is 0.95 mmol Co 2+ /g·resin. The cobalt ion adsorbed on macro porous phosphonic acid resin can be eluted by 2 mol/L HCl quantitatively. The resin can be regenerated and reused without apparant decreasing of sorption capactiy. The basic adsorption parameter and mechanism of macro porous phosphonic acid resin for cobalt(Ⅱ)ion were also determined by chemical analysis and IR spectrum.