交联羧甲基葡甘聚糖微球对钪的吸附性能

The Sc3+ Adsorption Capacity of Crosslinked Carboxymethyl Glucomannan Microshperes

探索了新型吸附材料交联羧甲基葡甘聚糖（CCMKGM）微球的制备条件,研究了交联羧甲基葡甘聚糖微球材料对Sc^3＋的吸附特性,分别考察了时间、pH、温度、Sc^3＋的浓度对微球材料吸附Sc^3＋的影响;同时测定了微球材料的洗脱与再生性能.结果表明：pH和温度对交联羧甲基葡甘聚糖微球吸附Sc^3＋有明显的影响,Sc^3＋的平衡吸附量随pH和温度的升高而升高.在50℃下,HAc-NaAc介质中,Sc^3＋质量浓度为400mg/L,pH为6.40时,吸附容量达到92.9mg/g,CCMKGM对Sc^3＋的吸附在9h左右基本达到平衡.再生CCMKGM效果与原CCMKGM基本一致。

The preparation parameters and the effects of absorption time,pH value,temperature and the concentrations of Sc^3＋on the capacity of a new absorbent material,Crosslinked Carboxymethyl Glucomannan Microshperes（CCMGM）,were studied in detail.In the meantime,the elution property and regenerability of the microballoon material were determined.The results showed that：pH value and temperature have obvious effects on the Sc^3＋absorption capacity of CCMGM and the Sc3＋equilibrium absorption capacity increased with increase of pH value and temperature.The absorption capacity reached up to 92.9mg/g if the Sc^3＋concentration was at 400mg/L,pH value at 6.40,temperatures under 50℃;and,about 9hours later,in HAc-NaAc medium,the adsorption reached equilibrium.The capacity of regenerated CCMGM was basically consistent with the original CCMGM.