Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossolo
Sequential extraction is not totally effective to dissolve distinct forms of trace elements. The extractive solution, for example, can dissolve less of the target fraction and more than another not wished fraction. The goal of this work is to compare the extraction of native iron with three sequenti...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2003-01-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422003000300007 |
| _version_ | 1811310096900161536 |
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| author | Lã Otavio Raymundo Barra Cristina Maria Amaral Sobrinho Nelson Moura Brasil do Mazur Nelson Velloso Ary Carlos Xavier |
| author_facet | Lã Otavio Raymundo Barra Cristina Maria Amaral Sobrinho Nelson Moura Brasil do Mazur Nelson Velloso Ary Carlos Xavier |
| author_sort | Lã Otavio Raymundo |
| collection | DOAJ |
| description | Sequential extraction is not totally effective to dissolve distinct forms of trace elements. The extractive solution, for example, can dissolve less of the target fraction and more than another not wished fraction. The goal of this work is to compare the extraction of native iron with three sequential extraction methods of the heavy metals, using three soils with different physical chemistry characteristics: a histosol, an oxisol, and a mollisol. The results obtained in this work demonstrate that a smaller relation soil/extractor results in a larger extraction in almost all phases. The use of many stages of the sequential extraction, with the purpose of more association of the metal with different components of the soil, can result, among other things, in modification of the substratum by the action of the reagents used, besides reducing the selectivity of the more specific extractors. Readsorption and redistribution of the heavy metals could have happened with larger intensity in the fraction where hidroxilamine was used with higher temperature. Sequential extraction of iron, without enrichment of soil samples, in the respective fractions in each method, it was important to better understand the behavior of the reagents considered specific to each form of the metal in soil. |
| first_indexed | 2024-04-13T09:52:41Z |
| format | Article |
| id | doaj.art-2d53fa9a3ec54e539a3246bb1c1b9265 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-04-13T09:52:41Z |
| publishDate | 2003-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-2d53fa9a3ec54e539a3246bb1c1b92652022-12-22T02:51:32ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642003-01-01263323330Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossoloLã Otavio RaymundoBarra Cristina MariaAmaral Sobrinho Nelson Moura Brasil doMazur NelsonVelloso Ary Carlos XavierSequential extraction is not totally effective to dissolve distinct forms of trace elements. The extractive solution, for example, can dissolve less of the target fraction and more than another not wished fraction. The goal of this work is to compare the extraction of native iron with three sequential extraction methods of the heavy metals, using three soils with different physical chemistry characteristics: a histosol, an oxisol, and a mollisol. The results obtained in this work demonstrate that a smaller relation soil/extractor results in a larger extraction in almost all phases. The use of many stages of the sequential extraction, with the purpose of more association of the metal with different components of the soil, can result, among other things, in modification of the substratum by the action of the reagents used, besides reducing the selectivity of the more specific extractors. Readsorption and redistribution of the heavy metals could have happened with larger intensity in the fraction where hidroxilamine was used with higher temperature. Sequential extraction of iron, without enrichment of soil samples, in the respective fractions in each method, it was important to better understand the behavior of the reagents considered specific to each form of the metal in soil.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422003000300007sequential extractionreadsorption and redistributionheavy metals |
| spellingShingle | Lã Otavio Raymundo Barra Cristina Maria Amaral Sobrinho Nelson Moura Brasil do Mazur Nelson Velloso Ary Carlos Xavier Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossolo Química Nova sequential extraction readsorption and redistribution heavy metals |
| title | Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossolo |
| title_full | Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossolo |
| title_fullStr | Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossolo |
| title_full_unstemmed | Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossolo |
| title_short | Avaliação dos métodos de extração sequencial de Tessier, Keller e Miller na determinação de ferro nativo em três tipos de solos: orgânico, brunizem e latossolo |
| title_sort | avaliacao dos metodos de extracao sequencial de tessier keller e miller na determinacao de ferro nativo em tres tipos de solos organico brunizem e latossolo |
| topic | sequential extraction readsorption and redistribution heavy metals |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422003000300007 |
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