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Preparation of aminoalkyl celluloses and their adsorption and desorption of heavy metal ions
Author(s) -
Nakamura Shigeo,
Amano Masato,
Saegusa Yasuo,
Sato Toshihiko
Publication year - 1992
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.1992.070450207
Subject(s) - adsorption , metal ions in aqueous solution , chemistry , desorption , metal , inorganic chemistry , qualitative inorganic analysis , ethylenediamine , ion , methylene , moiety , organic chemistry
Aminoalkyl celluloses (AmACs) were prepared from 6‐chlorodeoxycellulose and aliphatic diamines H 2 N(CH 2 ) m NH 2 (m = 2, 4, 6, 8). Their adsorption and desorption of divalent heavy metal ions such as Cu 2+ , Mn 2+ , Co 2+ , Ni 2+ and their mixtures were also investigated in detail. Adsorption of metal ions on AmACs was remarkably affected by the pH of the solution, the metal ion and its initial concentration, and also the number of methylene units in the diamines. No adsorption of metal ions occurred on AmACs in strongly acidic solutions. However, metal ions were adsorbed rapidly on AmACs from weakly acidic solutions and the amount of adsorption increased with increasing pH. The effectiveness of AmACs as adsorbents decreased with increasing length of the methylene moiety, and AmACs from ethylenediamine ( m = 2) was most effective. The adsorption of metal ions on AmACs was in the order Cu 2+ > Ni 2+ > Co 2+ > Mn 2+ . Accordingly, their behavior followed the Irving‐Williams series and Cu 2+ ions were preferentially adsorbed from solutions containing metal ion mixtures. The adsorbed ions were easily desorbed from the AmACs by stirring in 0.1 M HCl.