固化杨梅单宁(IMT)是以胶原纤维为基质,通过醛交联剂将杨梅单宁固化在胶原纤维上所制备的吸附材料.研究了该吸附材料对稀土元素Nd3+的富集性能.实验表明:该吸附材料对Nd3+的吸附平衡量受温度和pH的影响.在293～323 K时,Nd3+的吸附平衡量随温度的升高而增加.pH值对吸附平衡量影响较大,在pH为3.5～5.5范围内,吸附量随pH升高而增加.当pH≥6时,吸附量开始逐渐下降.吸附平衡符合Freundlich方程.研究表明,吸附动力学可用拟二级速度方程来描述,由拟二级速度方程计算所得到的吸附平衡量与实测值的偏差在4%以内,具有很好的一致性.其吸附性能为稀土生产工业废液中稀土金属的回收,微痕量Nd3+的富集和测试,以及单一稀土的绿色分离提供了科学依据.
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