Leaching of metals from fly ashes in the presence of complexing agents

被引：49
作者：
Janos, P
Wildnerová, M
Loucka, T
机构：
[1] Res Inst Inorgan Chem, Usti Nad Labem 40001, Czech Republic
[2] JE Purkyne Univ, Fac Environm, Usti Nad Labem 40001, Czech Republic
来源：
WASTE MANAGEMENT | 2002年 / 22卷 / 07期
关键词：
D O I：
10.1016/S0956-053X(02)00039-9
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The leachability of some metals (Al, As, Ba, Ca, Cr, Cu, Fe, K, Mg, Mn, Ti, Zn) from fly ashes was studied in the presence of ethylenediamine tetraacetic acid (EDTA) and naturally occurring complexing agents-humic acids (HAs). Secondary complex-forming equilibria taking place in the leachates increase significantly the leached amounts of most metals. Kinetic experiments showed that almost the whole "available" amounts of metals are leached from fly ash within a time period of several hours (mostly within 20 h), with exceptions of matrix constituents (typically aluminium), which are released more slowly. (C) 2002 Published by Elsevier Science Ltd.
引用
收藏
页码：783 / 789
页数：7
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