Adsorption of As, Cu, Ph and Cr for the assessment of metal retention by two different residues from iron ore mines.

被引：15

作者：

Basílio, MSV

Friese, K

de Lena, JC

Nalini, HA

Roeser, HMP

机构：

[1] Ctr Educ Tecnol Minas Gerais, BR-30480000 Belo Horizonte, MG, Brazil

[2] UFZ Helmholtz Ctr Environm Res, Dept Lake Res, D-39114 Magdeburg, Germany

[3] Univ Fed Ouro Preto, Inst Ciencias eXATAS & Biol, BR-35400000 Ouro Preto, MG, Brazil

[4] Univ Fed Ouro Preto, Escola Minas, Dept Geol, BR-35400000 Ouro Preto, MG, Brazil

来源：

QUIMICA NOVA | 2005年 / 28卷 / 05期

关键词：

iron rich sediments; adsorption isotherm; sequential extraction;

D O I：

10.1590/S0100-40422005000500018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two samples of residues from iron mining plants have been investigated for their retention capacity of As, Cu, Cr, and Pb. The sample with the higher content of iron oxides showed the highest capacity to retain metals. The adsorption affinity series changes from Pb > Cu > Cr approximate to As to As > Pb > Cu > Cr or As > Cu > Cr > Pb, depending on the material and the concentration of the initial solution. In the competitive environment, the Pb adsorption decreases and the As, Cu and Cr adsorption increases. Sequential extraction procedures, carried out after adsorption batch experiments, showed that the most important adsorption process occurs in the oxide fraction and that the major part of the absorbed metal is remobilized from exchangeable and oxide fractions.

引用

页码：822 / 828

页数：7

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