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Premium Absorption and desorption of chromium ions by poly(acrylic acid) gels
Heitz Caroline,
BinanaLimbele William,
François Jeanne,
Biver Claudine
Publication year1999
Publication title
journal of applied polymer science
Resource typeJournals
PublisherJohn Wiley & Sons
Abstract The ability of crosslinked poly(acrylic acid) gels to retain chromium species was studied as a function of pH. Chromium retention was found to increase with pH according to two mechanisms. In the low pH range where chromium species are soluble, retention occurs via ion‐binding in the whole volume of the gel. At higher pH where insoluble chromium hydroxide particles are formed, retention comes from an adsorption process at the surface of the gel. The desorption of chromium species under acidic conditions was also investigated and found to be very dependent on retention mechanism and aging time of the polymer–chromium complex. When retention occurs by ion‐binding, only partial desorption was achieved at very short aging time. In contrast, a very fast desorption was observed when retention occurs via adsorption at the surface of the polymer gel. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 455–466, 1999
Subject(s)acrylic acid , adsorption , chemistry , chromium , copolymer , desorption , hydroxide , inorganic chemistry , organic chemistry , polymer , polymer chemistry
SCImago Journal Rank0.575

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