Adsorption-reduction synergistic effect for rapid removal of Cr (VI) ions on superelastic NH2-graphene sponge

被引：56

作者：

Sun, Yiran ^{[1
]}

Yu, Fei ^{[2
]}

Li, Liqing ^{[3
]}

Ma, Jie ^{[1
,4
,5
]}

机构：

[1] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China

[2] Shanghai Ocean Univ, Coll Marine Ecol & Environm, Shanghai 201306, Peoples R China

[3] Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 34100, Jiangxi, Peoples R China

[4] Tongji Univ, Res Ctr Environm Funct Mat, Coll Environm Sci & Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China

[5] Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 421卷

基金：

中国国家自然科学基金;

关键词：

Graphene Aerogel; Hexavalent Chromium; Adsorption; Reduction; Amino-functionalization; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTION; GRAPHENE OXIDE; ACTIVATED CARBON; WASTE-WATER; CONGO RED; CR(VI); PERFORMANCE; COMPOSITE; ADSORBENT;

D O I：

10.1016/j.cej.2021.129933

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Eliminating the environmental risks of Hexavalent Chromium (Cr (VI)) in aqueous environment was of great importance. Herein, we developed a flexible one-pot approach to synthesize novel amino-functional graphene sponge adsorbents (AFGS), in which graphene nanosheets assembled into 3D network on melamine sponge skeletons with the assistance of ethylene diamine. Benefiting from the functionalization of amino groups, AFGS showed outstanding adsorption capacity (166.46 mg g-1) because of the strong affinity with Cr (VI). Moreover, AFGS could reduce Cr (VI) into less toxic Cr (III) in low pH. The adsorption-reduction mechanism of Cr (VI) on AFGS was investigated in-depth via L-edge X-ray adsorption spectra and XPS spectra. The excellent mechanical strength, structural stability and cycling performance verified the potential of AFGS adsorbents in treating chromium containing wastewater.

引用

页数：7