Monitoring trace amounts of lead and arsenic adsorption by X-ray absorption fine structure combined with fluorescence spectrometry

被引：5

作者：

Izumi, Yasuo ^{[1
]}

Kiyotaki, Fumitaka ^{[1
]}

Minato, Taketoshi ^{[1
]}

Masih, Dilshad ^{[1
]}

Seida, Yoshimi ^{[2
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan

[2] Inst Res & Innovat, Kashiwa, Chiba 2770861, Japan

来源：

PHYSICA SCRIPTA | 2005年 / T115卷

关键词：

D O I：

10.1238/Physica.Topical.115a00933

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X-ray absorption. ne structure combined with fluorescence spectrometry was used for the speciation of trace amounts of lead and arsenic adsorbed. The Pb2+ species were effectively adsorbed on a layered material Mg6Fe2(OH)(16)(CO3)center dot 3H(2)O from 100 ppb - 1.0ppm test aqueous solutions. A eutectic mixture of PbCO3 and Pb(OH)(2) coagulated in the case of a 1.0ppm Pb2+ solution, and in contrast, the major species was ion-exchanged Pb2+ in the case of the adsorption from the 100 ppb aqueous solution. The arsenic species were effectively adsorbed on intercalated Fe-montmorillonite from 50 ppb - 16ppm test aqueous solutions. In this concentration range, As3+ in the solution was oxidized upon adsorption. The adsorbed structure was suggested to be [As-V(OH)(2)(mu-OFe)(2)] both in the cases of adsorption of As3+ and As5+.

引用

页码：933 / 935

页数：3

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