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Adsorption and recognition properties of ionic imprinted polyamine IIP‐PEI/SiO 2 towards Pb 2+ ion
Author(s) -
An Fuqiang,
Gao Baojiao,
Feng Xiaoqin
Publication year - 2009
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.29751
Subject(s) - adsorption , selectivity , endothermic process , chemisorption , monolayer , langmuir adsorption model , langmuir , isothermal process , chemistry , ionic bonding , selective adsorption , ionic strength , ion , polymer , inorganic chemistry , materials science , organic chemistry , catalysis , thermodynamics , aqueous solution , biochemistry , physics
In this article, an ionic imprinted polyamine (IIP) grafted on the surface of silica gel was prepared through a new surface imprinting approach. The adsorption and recognition properties of IIP‐PEI/SiO 2 for Pb 2+ ion were studied in detail using batch rebinding studies. The experimental results showed that the IIP‐PEI/SiO 2 had high affinity, specificity, and selectivity for the template ion. The isothermal adsorption data was fit using the Langmuir equation. The adsorption was typical of chemisorption of a monolayer. The selectivity coefficients relative to Zn 2+ and Cr 3+ were 32.43 and 68.36, respectively. pH and temperature were found to have a strong influence on the adsorption properties. The adsorption amount increases with rising of temperature and the value of Δ H is plus. The adsorption of Pb 2+ by IIP‐PEI/SiO 2 was spontaneous and endothermic. At pH = 7, the adsorption capacity of the polymers was the highest. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009