New amphoteric flocculant containing beta-cyclodextrin, synthesis, characterization and decolorization properties
To react with the cationic monomer, N-trimethylaminoethylmethacrylate chloride (TMAEMC), a beta-CD derivative carrying vinyl carboxylic acid groups (beta-CD-MAH) was designed and synthesized via esterfying reaction between beta-CD and maleic anhydride (MAH). Whereafter, a water-soluble amphoteric fl...
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Published in | Journal of hazardous materials Vol. 173; no. 1-3; pp. 298 - 304 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Netherlands
15.01.2010
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Subjects | |
Online Access | Get full text |
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Summary: | To react with the cationic monomer, N-trimethylaminoethylmethacrylate chloride (TMAEMC), a beta-CD derivative carrying vinyl carboxylic acid groups (beta-CD-MAH) was designed and synthesized via esterfying reaction between beta-CD and maleic anhydride (MAH). Whereafter, a water-soluble amphoteric flocculant, the copolymer of TMAEMC and beta-CD-MAH (beta-CD-MAH-TMAEMC) has been synthesized by means of free radical copolymerization using the ammonium persulfate (APS) and sodium bisulfite (SBS) redox system as the initiator. The copolymer structure was demonstrated by FT-IR, (1)H NMR, SEM characterizations. Its excellent flocculated decolorization properties were evaluated with Acid Light Yellow 2G solutions using a jar test method. With the mass ratio of 1/10 (w/w) between the flocculant and dye, and at pH 4 and 20 degrees C of the initial dye solution, the maximum color removal reached. The charge neutralization played a dominant role during the flocculated decolorization process, although the inclusion of dye molecules into the cavities of beta-CD well maintained in side chain of beta-CD-MAH-TMAEMC also contributed to the conglomerates and floccules. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1873-3336 |
DOI: | 10.1016/j.jhazmat.2009.08.083 |