Mossbauer spectroscopy in the characterization of ferrous compounds in soils and its relationship with phosphorus retention

被引：8

作者：

Curi, Nilton ^{[2
]}

Ferreira da Motta, Paulo Emilio ^{[3
]}

Fabris, Jose Domingos ^{[4
]}

Alves de Oliveira, Luiz Carlos ^{[1
]}

机构：

[1] Univ Fed Lavras, Dept Quim, BR-37200000 Lavras, MG, Brazil

[2] Univ Fed Lavras, Depto Ciencia Solo, BR-37200000 Lavras, MG, Brazil

[3] Embrapa Solos, BR-22460000 Rio De Janeiro, Brazil

[4] Univ Fed Minas Gerais, Depto Quim, BR-31270901 Belo Horizonte, MG, Brazil

来源：

QUIMICA NOVA | 2008年 / 31卷 / 06期

关键词：

iron oxides; phosphorus sorption; Mossbauer spectroscopy;

D O I：

10.1590/S0100-40422008000600035

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The chemical role of iron-bearing compounds on the dynamics of phosphorus in selected Brazilian latosols was investigated. The iron oxides were characterized in an attempt to assess their main chemical-mineralogical properties influencing the ion sorption mechanisms in those pedosystems. It was found that increasing total iron contents tend to increase the phosphorus adsorption capacity in the selected soils. 110 K-Mossbauer data reveal that the dominant iron oxides are hematite and goethite. Particularly for the yellower soil samples some prominent doublets, more certainly due to superparamagnetic relaxation, may be assigned to corresponding fractions of relatively small-sized particles.

引用

页码：1467 / 1471

页数：5

共 15 条

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