Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
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Extraction Behavior and Selective Separation of Lead(II) Using N,N-Dioctyldiglycol Amic Acid
Kojiro SHIMOJOAyaka NAKAIHiroyuki OKAMURAAkira OHASHIHirochika NAGANAWA
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JOURNALS FREE ACCESS

2013 Volume 29 Issue 1 Pages 147-150

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Abstract

Selective separation of lead ions (Pb2+) from aqueous solutions containing multiple divalent metal ions (Pb2+, Cu2+, Cd2+, Zn2+, Mn2+, Co2+, and Ni2+) was investigated using liquid–liquid extraction. N,N-Dioctyldiglycol amic acid (DODGAA) enabled quantitative extraction and efficient separation of Pb2+ from the metal ion mixture under mildly acidic conditions. Compared with conventional commercial extractants, DODGAA provided better extraction and excellent selectivity for Pb2+. The extraction of Pb2+ with DODGAA proceeded through a proton-exchange reaction and formed a 1:2 complex, Pb(DODGAA)2. The Pb2+ was readily stripped from the extracting phase under acidic conditions, and the organic solution with DODGAA could be recycled.

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© 2013 by The Japan Society for Analytical Chemistry
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