海水
吸附
萃取(化学)
化学
锂(药物)
对偶(语法数字)
基质(化学分析)
无机化学
环境化学
色谱法
海洋学
有机化学
地质学
生物
艺术
文学类
内分泌学
作者
Han Yu,Liuqian An,Yan Yang,Yuling Ma,Hongliang Sun,Jinxin Yao,Tao Zhang,Wei Wang
标识
DOI:10.1016/j.watres.2024.122571
摘要
Lithium ion sieve adsorbents frequently extract liquid lithium resources due to their adsorption effect and cost advantages. However, the adsorption effect is significantly influenced by the ambient pH. The pH effects on the adsorption process can be categorized into two main areas: the competition adsorption of impurity ions and the difference in surface zeta potential. A dual-matrix modulation adsorbent was prepared, comprising a carrier matrix modified with zwitterionic quaternary ammonium bases and an adsorption matrix modified with carboxylation. The zwitterionic quaternary ammonium base groups were employed to mitigate the competitive adsorption of impurity ions by acid-base neutralization. Furthermore, the negative charge of carboxyl groups was employed to diminish the discrepancy in surface zeta potential. The adsorption effect of the ion sieve adsorbent under natural conditions appeared to be significantly enhanced by the dual-matrix modulation, with the saturated adsorption capacity (28 mg/g) and adsorption selectivity (α(Li
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