Selective lead ion recovery from multiple cation waste streams using the membrane-electrode process

被引:17
作者
Gopal, V [1 ]
April, GC [1 ]
Schrodt, VN [1 ]
机构
[1] Univ Alabama, Dept Chem Engn, Tuscaloosa, AL 35487 USA
关键词
heavy metal; hybrid process; membrane-electrode (M-E); selective cation recovery; waste water treatment;
D O I
10.1016/S1383-5866(98)00063-X
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Selective cation recovery from dilute, aqueous, multi-cation waste streams addresses a solution method to a class of problems with worldwide implications. The absence of large scale systems to handle such waste streams and severe limitations of conventional technologies have been the motivating forces behind the development of the membrane-electrode (M-E) process. Thus far, the M-E process has been effectively demonstrated for selective recovery of Pb2+ and Cu2+ ions from dilute aqueous binary cation solutions [V. Gopal, G.C. April, V.N. Schrodt, Selective removal of copper from multi-cation dilute aqueous solutions using the membrane-electrode process, J. Sep. Sci. Technol. 33 (5) (1998) in press]. This paper extends coverage to Pb2+ ion recovery from a mixture containing Pb2+ ions and Fe2+ ions. It is found that the applied cathodic potential is the parameter controlling the rate and selectivity of ion-exchange in the M-E process. An inverse relationship exists between the applied cathodic potential and rate of ion-exchange, while a direct relationship exists between the applied cathodic potential and Pb2+ ion selectivity. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:85 / 93
页数:9
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