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Adsorption of aromatic acids on an aminated hypercrosslinked macroporous polymer

✍ Scribed by B.C Pan; Y Xiong; A.M Li; J.L Chen; Q.X Zhang; X.Y Jin

Book ID: 104425169
Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 804 KB
Volume: 53
Category: Article
ISSN: 1381-5148
DOI: 10.1016/s1381-5148(02)00123-2

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✦ Synopsis

In the present study a hypercrosslinked macroporous polymer CHA-111 was chemically modified by amination with dimethylamine. Adsorption of five aromatic acids on the modified polymer MCH-111 was investigated and adsorption capacities of aromatic acids from aqueous solution increased significantly after amination. The Freundlich and Langmuir isotherm equations were employed to fit the adsorption processes to describe adsorption mechanism. Hydrogen-bonding interaction should be regarded as a fundamental contributor to increasing adsorption capacities of aromatic acids on MCH-111. Surface structure of MCH-111 caused by postcrosslinking reaction will enhance the NPM-matrix interaction and then lead to higher activity of amino group on MCH-111 than a macroporous weakly anion exchanger D301. The negative isosteric enthalpy changes for adsorption of benzenesulfonic acid and naphthalenesulfonic acid indicate an exothermic process on the aminated polymer.

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