新型海藻酸钠-聚乙烯亚胺杂化水凝胶从水中高效去除铜离子。
Highly efficient removal of copper ions from water by using a novel alginate-polyethyleneimine hybrid aerogel.
机构信息
College of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, China.
College of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246133, China.
出版信息
Int J Biol Macromol. 2019 Oct 1;138:1079-1086. doi: 10.1016/j.ijbiomac.2019.07.160. Epub 2019 Jul 26.
In this study, a novel alginate-polyethyleneimine hybrid aerogel (Alg-PEI) that could remove Cu from wastewater was prepared by using a simple one-step synthesis and vacuum freeze-drying technology. As-prepared Alg-PEI exhibited high affinity and selectivity toward Cu and could take up 95.1% of the Cu in a 0.1 mM Cu solution. The selectivity coefficients of Alg-PEI for Cu exceeded 10 even in the presence of Co, Fe, Cr, or Cd. The maximum adsorption capacity of the Alg-PEI for Cu reached 214.4 mg/g, which is higher than that of most reported Cu-sorbents. Moreover, Alg-PEI could be regenerated by simple acid-washing and used repeatedly. Analysis of the adsorption mechanism of the aerogel revealed that Alg-PEI binds Cu mainly through ion exchange and chemical coordination effects.
在这项研究中，通过使用简单的一步合成和真空冷冻干燥技术，制备了一种新型的海藻酸钠-聚乙烯亚胺杂化气凝胶（Alg-PEI），可从废水中去除 Cu。所制备的 Alg-PEI 对 Cu 具有高亲和力和选择性，可从 0.1 mM Cu 溶液中吸附 95.1%的 Cu。即使存在 Co、Fe、Cr 或 Cd，Alg-PEI 对 Cu 的选择性系数也超过 10。Alg-PEI 对 Cu 的最大吸附容量达到 214.4 mg/g，高于大多数报道的 Cu 吸附剂。此外，Alg-PEI 可以通过简单的酸洗再生并重复使用。对气凝胶吸附机理的分析表明，Alg-PEI 主要通过离子交换和化学配位作用与 Cu 结合。
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