Structural study of the incorporation of heavy metals into solid phase formed during the oxidation of EDTA by permanganate at high pH

被引：23

作者：

Korshin, Gregory V. ^{[1
]}

Chang, Hyun-Shik

Frenkel, Anatoly I.

Ferguson, John F.

机构：

[1] Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98115 USA

[2] Yeshiva Univ, Dept Phys, New York, NY 10016 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2007年 / 41卷 / 07期

关键词：

D O I：

10.1021/es062554t

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Properties of solid phases formed during the oxidation of EDTA by permanganate in a high-pH, high-ionic strength solution, and the retention of Cu2+, Ni2+, and Zn2+ by them were examined. Morphologically, the solids were agglomerates of particles with sizes < 100 nm. X-ray absorption spectroscopy (XAS) analysis indicated that these particles were birnessite. Its precipitation was accompanied by the removal of Zn2+ and Cu2+ released as a result of the breakdown of their complexes with EDTA. However, Ni2+ was not removed from the supernatant. Cu2+ was strongly bound by birnessite and exhibited little mobility in the pH range from 3 to 14. Zn2+ was more mobile, especially at pH > 12. XAS showed that Cu2+ binding sites were located within MnO6 octahedra-comprised sheets that constitute birnessite while Zn2+ was positioned between them.

引用

页码：2560 / 2565

页数：6

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