CHARACTERIZATION OF IRON-FULVIC ACID COMPLEXES USING MOSSBAUER AND ELECTRON-PARAMAGNETIC-RES SPECTROSCOPY

被引:22
作者
GOODMAN, BA
CHESHIRE, MV
机构
[1] Macaulay Inst for Soil Research, Aberdeen, Scotl, Macaulay Inst for Soil Research, Aberdeen, Scotl
关键词
IRON COMPOUNDS - Spectroscopic Analysis - SPECTROSCOPY; MOSSBAUER;
D O I
10.1016/0048-9697(87)90505-5
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The usefulness of Moessbauer and electron paramagnetic resonance (EPR) spectroscopy in characterizing the products of the reaction of iron with humic substances is discussed and illlustrated with results obtained from soil fulvic acids. These results show that the nature of the products varies with pH and with the iron:fulvic acid ratio. Reduction of iron(III) to iron(II) increases with decreasing pH, and complexation, in the form of mononuclear Fe(III) species, increases with decreasing Fe:fulvic acid ratios, but shows little pH dependence. Evidence is also seen for the presence of polynuclear species even when large excesses of fulvic acid are present.
引用
收藏
页码:229 / 240
页数:12
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