FTIR Spectral Components of Schwertmannite

被引：91

作者：

Boily, Jean-Francois ^{[1
]}

Gassman, Paul L. ^{[2
]}

Peretyazhko, Tetyana ^{[2
]}

Szanyi, Janos ^{[2
]}

Zachara, John M. ^{[2
]}

机构：

[1] Umea Univ, Dept Chem, SE-90187 Umea, Sweden

[2] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2010年 / 44卷 / 04期

关键词：

ACID-MINE DRAINAGE; SULFATE; IRON; TRANSFORMATION; COORDINATION; ARSENATE; SPECTROSCOPY; HYDROXIDES; SPECIATION; GOETHITES;

D O I：

10.1021/es902803u

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Fourier transform infrared (FTIR) spectral components of three dominant groups of sulfate species in synthetic schwertmannite (FeO8O8(OH)(6-x)(SO4)(x)center dot nH(2)O) are presented. These components were extracted by multivariate curve resolution analysis of spectra obtained from N-2(g)-dry samples initially reacted in aqueous solutions (pH 3-9) at room temperature. Each component contains complex sets of bands that correspond to mixtures of similar species. We tentatively assign these components to sulfate ions that are hydrogen- (components I and III) and iron-bonded (component I) to schwertmannite. Another component (II) is assigned to protonated sulfate species. Heating experiments to 130 degrees C moreover confirmed this possibility for component II. The spectral components extracted from this study can be used to identify dominant sulfate species in FTIR spectra of naturally occurring schwertmannite samples.

引用

页码：1185 / 1190

页数：6

共 45 条

[1]

BIGHAM JM, 1990, GEOCHIM COSMOCHIM AC, V54, P2743

[2] Schwertmannite and the chemical modeling of iron in acid sulfate waters [J].