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

Química Nova

Embrapa Solos, Rio de Janeiro, Brasil¹  Motta, Paulo Emilio Ferreira da¹  Curi, Nilton¹  Oliveira, Luiz Carlos Alves de¹  Universidade Federal de Lavras, Lavras, Brasil¹  Universidade Federal de Minas Gerais, Belo Horizonte, Brasil¹  Fabris, José Domingos¹ 

关键词: iron oxides;    phosphorus sorption;    Mö;    ssbauer spectroscopy.;   

DOI  :  10.1590/S0100-40422008000600035

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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-Mössbauer 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.

【 授权许可】

Unknown