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Preparation and coordination behavior of cellulose beads derivative modified by 1,5‐diaminoethyl‐3‐hydroxy‐1,5‐diazacycloheptane
Author(s) -
He YongBing,
Meng LingZhi,
Wu ChengTai,
Qian Ting
Publication year - 1999
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/(sici)1097-4628(19991031)74:5<1278::aid-app25>3.0.co;2-m
Subject(s) - adsorption , chemistry , thermogravimetric analysis , cellulose , copper , coordination complex , reaction rate constant , metal ions in aqueous solution , inorganic chemistry , ligand (biochemistry) , differential thermal analysis , nuclear chemistry , metal , organic chemistry , kinetics , biochemistry , physics , receptor , optics , quantum mechanics , diffraction
Cellulose derivative (MPCN) modified by 1,5‐diaminoethyl‐3‐hydroxy‐1,5‐diazacycloheptane (DADN) was prepared and characterized by scanning electron microscopy and elemental, and infrared analysis. MPCN and its Cu 2+ , Pb 2+ complexes were characterized by thermogravimetric and differential thermal analysis. The coordination adsorption behavior of MPCN with divalent copper and lead ions was determined. The effects of temperature, initial pH value, and the concentration of MPCN ligand to the equilibrium adsorption were discussed. The optimum pH range of the coordination adsorption of MPCN with Cu 2+ and Pb 2+ is 5–6. The rate constants of the coordination reaction were found. At 323 K, the rate constant is 1.0 × 10 −3 and 7.0 × 10 −4 s −1 for Cu 2+ and Pb 2+ , respectively. The thermodynamic parameters of the coordination reaction were obtained based on the experiment data of the adsorption isotherms. The coordination reaction was performed spontaneously from the data of Δ G , as follows: −21.65 and −19.41 kJ/mol and Δ S , 87.06 and 67.92 J/mol K for Cu 2+ and Pb 2+ , respectively. The coordination ratio of DADN coordination group immobilized on cellulose beads with either metal ion is about 1 : 2 from the plot of the relation of lg D versus lg L and the capacity of saturation adsorption. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 1278–1285, 1999