摘要
以胶原纤维为基质,通过醛交联剂将杨梅单宁固化在胶原纤维上制备吸附材料。研究了该吸附材料对稀土元素Pr3+,Nd3+的吸附性能。结果表明:温度在293K^323K的范围内,Pr3+,Nd3+的吸附平衡量随温度的升高略有增加。pH值对吸附平衡量影响较大,在pH值为3.5~5.0范围内,吸附量随pH值升高而增加。当pH≥5.0时,吸附量开始逐渐下降。吸附动力学可用拟二级速率方程来描述,由拟二级速率方程计算所得到的吸附平衡量与实测值的偏差在6%以内。该吸附材料适合柱上操作,吸附柱也易于再生。
The immobilized myrtan tannins（IMT） based on collagen fiber was prepared through aldehyde cross-linking reaction. The adsorption property to Pr^3＋, Nd^3＋ was studied in this paper. Experiments show that the adsorbents adsorption equilibrium to Pr^3＋ and Nd^3＋ is affected by temperature and pH value. In the range of 293 K-323 K, the adsorption capacity of the novel adsorbents to Pr^3＋ and Nd^3＋ increases with increasing of temperature. When the temperature is over 323 K, the adsorption capacity decreases rapidly. In pH range of 3.5-5.0, the adsorption capacity increases with increasing of pH value. While pH ≥ 5.0, the adsorption capacity decreases. In the pH range of 5.0-5.5, the adsorption capacity of Nd^3＋ is twice higher than that of Pr^3＋. The adsorption kinetics data are well fitted by pseudo-second-order rate model, and the equilirium adsorption capacities calculated by pseudo-second-order rate model are nearly as same as the data actually determined with error〈6%.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第12期1928-1931,共4页
Rare Metal Materials and Engineering
基金
重大基础前期研究专项(2004CCA06100)
