Enhanced removal of Cr(VI) from aqueous solution by stabilized nanoscale zero valent iron and copper bimetal intercalated montmorillonite

被引：156

作者：

Wang, Yin ^{[1
]}

Gong, Yishu ^{[1
]}

Lin, Naipeng ^{[1
]}

Yu, Lan ^{[1
]}

Du, Baobao ^{[1
]}

Zhang, Xiaodong ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 606卷

基金：

中国国家自然科学基金;

关键词：

Nanoscale zero valent iron; Cr(VI); Montmorillonite; Copper; Galvanic cell; HIGHLY EFFICIENT REMOVAL; ZEROVALENT IRON; HEXAVALENT CHROMIUM; RANGE PERFORMANCE; WIDE PH; DEGRADATION; NANOPARTICLES; ADSORPTION; MECHANISM; CLAY;

D O I：

10.1016/j.jcis.2021.08.075

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Batch experiments were conducted to study the Cr(VI) removal by nanoscale zero valent iron and copper intercalated montmorillonite (MMT-nFe(0)/Cu-0) nanocomposite. MMT-nFe(0)/Cu-0 was characterized using SEM, TEM, XRD, FTIR, N-2 adsorption-desorption isotherms and XPS. The results demonstrated that highly dispersed nanoscale Fe-0/Cu-0 (nFe(0)/Cu-0) were successfully introduced into the montmorillonite (MMT) layers. In the reaction process, the combination of Cu-0 and Fe-0 acted as a galvanic cell, and electrocorrosion not only speeded up the reaction rate, but also increased reduction activity of nFe(0). MMT-nFe(0)/Cu-0 as an excellent carrier had good functions in dispersing nFe(0) and Cu-0 particles, pH buffering and could keep nFe(0) and Cu-0 particles from being released. Besides, no iron ions and very low concentrations of copper ions released in the reaction system, which greatly avoided the influence of secondary environmental pollution. (C) 2021 Elsevier Inc. All rights reserved.

引用

页码：941 / 952

页数：12

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