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Competitive removal of heavy metal ions by cellulose graft copolymers
Author(s) -
Güçlü Gamze,
Gürdağ Gülten,
Özgümüş Saadet
Publication year - 2003
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.12728
Subject(s) - cellulose , copolymer , grafting , polymer chemistry , aqueous solution , acrylic acid , metal ions in aqueous solution , chemistry , monomer , polyacrylic acid , nuclear chemistry , metal , materials science , organic chemistry , polymer
The effect of composition of graft chains of four types cellulose graft copolymers on the competitive removal of Pb 2+ , Cu 2+ , and Cd 2+ ions from aqueous solution was investigated. The copolymers used were (1) cellulose‐g‐polyacrylic acid (cellulose‐g‐pAA) with grafting percentages of 7, 18, and 30%; (2) cellulose‐g‐p(AA–NMBA) prepared by grafting of AA onto cellulose in the presence of crosslinking agent of N , N ′‐methylene bisacrylamide (NMBA); (3) cellulose‐g‐p(AA–AASO 3 H) prepared by grafting of a monomer mixture of acrylic acid (AA) and 2‐acrylamido‐2‐methyl propane sulphonic acid (AASO 3 H) containing 10% (in mole) AASO 3 H; and (4) cellulose‐g‐pAASO 3 H obtained by grafting of AASO 3 H onto cellulose. The concentrations of ions which were kept constant at 4 mmol/L in an aqueous solution of pH 4.5 were equal. Metal ion removal capacities and removal percentages of the copolymers was determined. Metal ion removal capacity of cellulose‐g‐pAA did not change with the increase in grafting percentages of the copolymer and determined to be 0.27 mmol metal ion/g copolymer . Although the metal removal rate of cellulose‐g‐p(AA–NMBA) copolymer was lower than that of cellulose‐g‐pAA, removal capacities of both copolymers were the same which was equal to 0.24 mmol metal ion/g copolymer . Cellulose did not remove any ion under the same conditions. In addition, cellulose‐g‐pAASO 3 H removed practically no ion from the aqueous solution (0.02 mmol metal ion/g copolymer ). The presence of AASO 3 H in the graft chains of cellulose‐g‐p(AA–AASO 3 H) created a synergistic effect with respect to metal removal and led to a slight increase in metal ion adsorption capability in comparison to that of cellulose‐g‐pAA. All types of cellulose copolymers were found to be selective for the removal of Pb 2+ over Cu 2+ and Cd 2+ . © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2034–2039, 2003