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Poly(ethylene‐ alt ‐maleic acid) as complexing reagent to separate metal ions using membrane filtration
Author(s) -
Rivas Bernabé L.,
Pooley S. Amalia,
Pereira Eduardo,
Montoya Erika,
Cid Rocío
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23794
Subject(s) - maleic acid , maleic anhydride , carboxylate , ethylene , hydrolysis , metal , reagent , metal ions in aqueous solution , polymer chemistry , chemistry , filtration (mathematics) , membrane , yield (engineering) , ligand (biochemistry) , nuclear chemistry , polymer , inorganic chemistry , copolymer , materials science , organic chemistry , catalysis , biochemistry , statistics , mathematics , receptor , metallurgy
Commercial, water‐soluble poly(ethylene‐ alt ‐maleic anhydride), P(E‐ alt ‐MAn), was quantitatively hydrolyzed by 0.2 M NaOH to yield poly(ethylene‐ alt ‐maleic acid), P(E‐ alt ‐MAc). The polymer structure is confirmed by FT‐IR spectroscopy. As the pH increases, metal ion affinity increases because the majority of the functional groups are present as carboxylate anions, which can form more stable complexes at a higher pH. By increasing the filtration factor, Z , metal ion affinity does not significantly decrease, which means that the ligand–metal interaction is strong and cannot be destroyed by washing with water at the filtration cell's pH. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 2057–2061, 2006