Study on Adsorption Behavior of Starch Graft Copolymer Microspheres to Cadmium Ions

doi:10.7506/spkx1002-6630-200901006

FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (1): 31-34.doi: 10.7506/spkx1002-6630-200901006

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Study on Adsorption Behavior of Starch Graft Copolymer Microspheres to Cadmium Ions

NING Qing-ju1，XIAO Hao-jiang1，LI Zhong-jin2，WANG Lei2，ZHU Lei2，YU Li-li2

(1.College of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi' an 710021, China；
2.College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China)

Received:2007-12-11 Revised:2008-04-14 Online:2009-01-01 Published:2010-12-29
Contact: NING Qing-ju1， E-mail:haojiang77@126.com

Abstract

Abstract:

Starch graft copolymer microspheres were synthesized by inverse suspension polymerization with N,N'- methylenebisacrylamide and soluble starch, using K2S2O8-NaHSO3 as initiator. The adsorption behavior of starch graft copolymer microspheres to Cd2+ was investigated. The starch graft copolymer microspheres and their adsorption products were characterized with scan electron microscope (SEM), FT-IR spectroscopy, X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The results showed that the adsorption behavior of the copolymer microspheres to Cd2+ is adapted to Langmiur and Freundlich adsorption isotherm equation. Furthermore, the adsorption of Cd2+ on microspheres not only decreases their crystallinity but promotes the rupture of bonds among their main chains.

Key words: starch graft copolymer microspheres, adsorption, Cd2+, behavior

CLC Number:

O636.12

NING Qing-ju1，XIAO Hao-jiang1，LI Zhong-jin2，WANG Lei2，ZHU Lei2，YU Li-li2. Study on Adsorption Behavior of Starch Graft Copolymer Microspheres to Cadmium Ions[J]. FOOD SCIENCE, 2009, 30(1): 31-34.

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Study on Adsorption Behavior of Starch Graft Copolymer Microspheres to Cadmium Ions

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