Flotation as a remediation technique for heavily polluted dredged material. 2. Characterisation of flotated fractions

被引：21

作者：

Cauwenberg, P ^{[1
]}

Verdonckt, F ^{[1
]}

Maes, A ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Lab Colloid Chem, B-3001 Heverlee, Belgium

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 1998年 / 209卷 / 2-3期

关键词：

flotation; oxidation; heavy metals; dredged material;

D O I：

10.1016/S0048-9697(97)00306-9

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The particle size distribution and the metal speciation of the heavy metals were investigated on dredged sediment and on the fractions obtained by mechanical agitated (Denver) flotation. The transition metal ions (cadmium, copper, lead and zinc) were flotated specifically independent of the particle size. Particle size analysis, EDTA extraction and sequential extracts indicated that during flotation a redistribution of metals occurred due to the oxidation of metal sulphides. This oxidation process was more pronounced when the flotation was performed at higher pH values and resulted in a decrease in flotation specificity. (C) 1998 Elsevier Science B.V.

引用

页码：121 / 131

页数：11

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