High efficiency and selective removal of Cu(II) via regulating the pore size of graphene oxide/montmorillonite composite aerogel

被引：59
作者：
Hao, Xin [1 ]
Yang, Shuyi [1 ]
Tao, E. [1 ,2 ]
Li, You [3 ]
机构：
[1] Bohai Univ, Coll Chem & Mat Engn, Liaoning Prov Key Lab Synth & Applicat Funct Cpds, Jinzhou 121013, Liaoning, Peoples R China
[2] Bohai Univ, Inst Ocean Res, Jinzhou 121013, Liaoning, Peoples R China
[3] Feixiang Leather Prod Co Ltd, Fuxin 123000, Liaoning, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2022年 / 424卷
基金：
中国国家自然科学基金;
关键词：
Graphene oxide; Montmorillonite; Nanosheets stack; Ion crosslinking; Selective removal; HIGH STRUCTURE STABILITY; DIVALENT-CATIONS; OXIDE AEROGELS; ADSORPTION; CHITOSAN; METAL; NANOCOMPOSITE; MONTMORILLONITE; CELLULOSE; HYDROGELS;
D O I：
10.1016/j.jhazmat.2021.127680
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, based on the differences in the coordination configurations of various alkaline earth metal ions (Ca (II) and Sr(II)) and sodium alginate (SA), the aerogel is functionalized with controllable slit-shaped pores structure, contributing by nanosheet stacking impact of graphene oxide (GO) and montmorillonite (MMT), which is able to selectively remove plane hydrate copper ions in complex wastewater systems. Sr-G/M is endowed with denser slit-shaped pores and could achieve more efficient selective removal of Cu(II), together with a best removal efficiency of 97.1%, proving by systematic adsorption tests. The selectivity tests show that Sr-G/M exhibits preferential adsorption for Cu(II) with a distribution coefficient of 41.85 L g(-1). Furthermore, Sr-G/M has excellent regeneration performance to be 86.4% after 8 recycles. Considering its cost-effectiveness, ecofriendliness, easy preparation and efficient selective removal performance, Sr-G/M holds great promise in selective removal of Cu(II) from complex wastewater systems.
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页数：11
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