Single-molecule polyamidoxime adsorbent for highly efficient uranium recovery and removal

被引：2
作者：
Yue, Y. [1 ]
Wang, B. [1 ]
Xu, X. [1 ]
Cai, D. [1 ]
Zhang, L. [1 ]
Hu, S. [1 ]
Xiao, J. [1 ]
Yang, T. [2 ]
Wang, D. [1 ]
Wu, H. [3 ]
机构：
[1] Hainan Univ, Sch Biomed Engn, Key Lab Biomed Engn Hainan Prov, State Key Lab Marine Resource Utilizat South China, Haikou 570228, Peoples R China
[2] Hainan Med Univ, Coll Pharm, Haikou 571199, Peoples R China
[3] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
MATERIALS TODAY CHEMISTRY | 2022年 / 26卷
基金：
中国国家自然科学基金;
关键词：
Uranium adsorption; Amphoteric polyelectrolytes; Single-molecule adsorbent; Amidoximated polyacrylonitrile; ION-EXCHANGE; AMIDOXIME; SEAWATER; ADSORPTION; EXTRACTION; U(VI);
D O I：
10.1016/j.mtchem.2022.101090
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Inspired by single-atom catalysts (SACs), a "single-molecule" polyamidoxime (SM-PAO) adsorbent is designed to implement ultra-fast and "nothing left" enrichment of uranium in a water environment. The amphoteric property of SM-PAO is systematically characterized and discussed for the first time. The amidoxime functional groups are nearly 100% accessible due to the dissolution of SM-PAO in solution with pH below or above the isoelectric point of SM-PAO sol (similar to pH 5). The collection of uranium-loaded adsorbent is realized by virtue of the dissolution-precipitation transformation of the SM-PAO. A record high adsorption capacity, 2221.9 mg-U/g-Ads, is achieved within several minutes' interaction and the bonding mechanism of adsorption is explained by the X-ray photoelectron spectroscopy. An automatic cleaning of uranium-polluted wastewater to potable water is demonstrated to show the great potential of SM-PAO adsorbent for practical application. (C) 2022 Elsevier Ltd. All rights reserved.
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页数：7
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