The kinetics of nickel sorption on pyrophyllite as monitored by x-ray absorption fine structure (XAFS) spectroscopy

被引：9

作者：

Scheidegger, AM ^{[1
]}

Lamble, GM ^{[1
]}

Sparks, DL ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,UPTON,NY 11971

来源：

JOURNAL DE PHYSIQUE IV | 1997年 / 7卷 / C2期

关键词：

D O I：

10.1051/jp4:1997233

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This study investigated the effect of reaction time (minutes to months) on the surface coordination environment of Ni sorbed onto pyrophyllite using XAFS. The data suggest the appearance of multinuclear Ni complexes after a reaction time of minutes. As reaction time progresses, these multinuclear Ni complexes increased in size ((NNi-Ni = 1.4-4.5). Ni-Ni bond distances (2.99-3.03 Angstrom) were similar to those for mixed Ni-Al hydroxides (3.03 Angstrom), but distinctively shorter than those for Ni(OH)(2)(s) (3.09 Angstrom). We propose that the formation of mixed Ni-Al hydroxides may explain the observed bond distances and coordination numbers.

引用

页码：773 / 775

页数：3

共 9 条

[1]

[Anonymous], J SOIL SCI

[2]

BISH DL, 1977, AM MINERAL, V62, P458

[3] A MODEL FOR TRACE-METAL SORPTION PROCESSES AT THE CALCITE SURFACE - ADSORPTION OF CD-2+ AND SUBSEQUENT SOLID-SOLUTION FORMATION [J].