College of Chemistry, Key Laboratory of Rare-scattered Elements of Liaoning Province, Liaoning University, Shenyang 110036, China.
College of Chemistry, Key Laboratory of Rare-scattered Elements of Liaoning Province, Liaoning University, Shenyang 110036, China.
Mater Sci Eng C Mater Biol Appl. 2019 Jun;99:1115-1122. doi: 10.1016/j.msec.2019.02.028. Epub 2019 Feb 12.
Diethanolamine functionalized cellulose based on rice husk (DEA-EPI-RH) was prepared to separate gallium ions from As(III) or/and Ge(IV) mixtures. The contents of hydroxyl functional group in the DEA-EPI-RH were up to 1.48 mmol g, and the maximum adsorption capacity for Ga(III) achieved to 130.44 mg g. The adsorption mechanism depended on the ion exchange of Ga(OH), Ga(OH), or Ga with trihydroxy hydrogen on the surface of the DEA-EPI-RH. The DEA-EPI-RH showed superior selectivity with high adsorption capacity towards gallium as compared to As(III) or/and Ge(IV) with several times higher than concentration of Ga(III). Furthermore, the excellent reusability of the DEA-EPI-RH were confirmed by the desorption and regeneration experiments. The studied adsorbent was deemed to be promising, environment-friendly and low-cost materials to recovery of gallium from aqueous solution containing As(III) or/and Ge(IV).
以稻壳为原料制备了二乙醇胺功能化纤维素（DEA-EPI-RH），用于从砷（III）和/或锗（IV）混合物中分离镓离子。DEA-EPI-RH 中的羟基官能团含量高达 1.48mmol/g，对 Ga(III)的最大吸附容量达到 130.44mg/g。吸附机制取决于 Ga(OH)、Ga(OH) 或 Ga 与 DEA-EPI-RH 表面上的三羟基氢的离子交换。与砷（III）和/或锗（IV）相比，DEA-EPI-RH 对镓具有较高的吸附容量和选择性，Ga(III)的浓度高出数倍。此外，通过解吸和再生实验证实了 DEA-EPI-RH 的优异可重复使用性。研究用吸附剂被认为是从含有砷（III）和/或锗（IV）的水溶液中回收镓的有前途、环境友好和低成本的材料。
