Role of clay minerals on reduction of Cr(VI)

被引：52

作者：

Kwak, Songjong ^{[1
,2
]}

Yoo, Jong-Chan ^{[1
,2
]}

Moon, Deok Hyun ^{[3
]}

Baek, Kitae ^{[1
,2
,4
]}

机构：

[1] Chonbuk Natl Univ, Dept Environm Engn, Jeonju 54896, South Korea

[2] Chonbuk Natl Univ, Soil Environm Res Ctr, Jeonju 54896, South Korea

[3] Chosun Univ, Dept Environm Engn, Gwangiu 61452, South Korea

[4] Chonbuk Natl Univ, Dept Bioact Mat Sci, Jeonju 54896, South Korea

来源：

GEODERMA | 2018年 / 312卷

关键词：

Ferrous; Reduction; Clay minerals; Speciation; CHROMIUM(VI) REDUCTION; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTION; WASTE-WATER; REMOVAL; SURFACE; SOIL; IRON(II); GOETHITE; KINETICS;

D O I：

10.1016/j.geoderma.2017.10.001

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Clay minerals could reduce Cr(VI) to Cr(III) in the soil, but the mechanisms and influential factors for the. reduction reaction have not been clearly reported. In this study, it was hypothesized that the Fe(II) released from the clay minerals or adsorbed on the clay surface plays a crucial role in the reduction of Cr(VI). The Fe(II) released from clay minerals reduced Cr(VI) rapidly in the aqueous phase at the initial stage, and the amount of Fe(II) in the aqueous phase was directly proportional to the amount of Cr(VI) reduced. Cr(VI) was then reduced gradually by the Fe(II) adsorbed on the clay minerals. XPS analysis confirmed the change of Fe speciation on the surface of the clay minerals. Therefore, we concluded that the reduction in Cr(VI) by the clay minerals was due to the Fe in the clay minerals.

引用

页码：1 / 5

页数：5

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