Rationally tailoring anion traps into electrospun nanofibers for highly efficient perrhenate/pertechnetate capture

被引：36

作者：

Chen, Dingyang ^{[1
]}

Liu, Zhaoli ^{[1
]}

Li, Shuying ^{[1
]}

Jing, Xiaofei ^{[1
]}

Tian, Yuyang ^{[1
]}

Hu, Wei ^{[1
]}

Cui, Fengchao ^{[1
]}

Zhao, Rui ^{[1
]}

Zhu, Guangshan ^{[1
]}

机构：

[1] Northeast Normal Univ, Fac Chem, Key Lab Polyoxometalate, Reticular Mat Chem Minist Educ, Changchun 130024, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 452卷

基金：

中国国家自然科学基金;

关键词：

Electrospinning; Nanofibers; Perrhenate; pertechnetate; Macroscopic adsorbents; Anion traps; (TCO4-)-TC-99; CONSTRUCTION; REMOVAL;

D O I：

10.1016/j.cej.2022.139148

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Developing cationic adsorbents for efficient radioactive pertechnetate (99TcO4- ) removal from water is of great significance in both nuclear fuel management and nuclear-related environmental treatment fields. However, tremendous efforts should be taken to improve the comprehensive performance of the adsorbent materials. Herein, novel cationic electrospun nanofibers were synthesized via the blending electrospinning from the branched polyethylenimine based solution and the following quaternization reaction by benzyl bromide. Consequently, abundant specific anion traps with hydrophobic microenvironment were constructed on the fibers. The obtained fiber adsorbents were systematically investigated to remove perrhenate (ReO4-) ions (the nonradioactive surrogate for TcO4- ), which exhibit satisfying adsorption performance in several aspects: high adsorption capacity (943 mg g-1), fast kinetics (30 min), good removal depth (distribution coefficient = 1.1 x 106 mL g-1), large dynamic column adsorption volume (1540 bed volume), and excellent ReO4- capture from solution with high ionic strength or acidity/alkalinity. The adsorption performance surpassed all macroscopic shapeable adsorbents and many powdery advanced porous materials, owing to their abundant adsorption sites, tailored anion traps and macroscopic fibrous structures. Overall, this work gives a useful insight into designing novel adsorbents for effective TcO4-/ReO4- capture.

引用

页数：9

共 46 条

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