Adsorption behavior and kinetics of porous starch microspheres to hydroxide ionsChinese Full Text
LI Zhong-jin,WANG Pei-lin,DING Jin-hao(Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science and Technology,Xi’an 710021)
Abstract: The porous starch microsphere was prepared by reversed phase suspension polymerization.The surface micropores of the starch graft copolymer were characterized by SEM,particle size analyzer and poresizer.The adsorption behavior to hydroxide ions was investigated by acid-base titration,the influence of temperatures and times on supersonic vibration were also discussed,and the kinetics characteristic of adsorption was ultimately studied.Results show that the adsorption performance of porous starch microspheres to hydroxide ions is obvious.The specific surface area is 7.696 m2/g,mean pore radius is 14.28 nm,and pore volume is 0.219 cm3/g.The pH can be reduced to 3:4 under neutral environment,it also can be reduced to 8:9 while the pH of the blank sample is 11.06 after acid base titration experiment.Higher temperatures are bad for adsorption property in less than 80℃,while supersonic vibration can enhance such property.The adsorption behavior is simulated by McKay equation,and the apparent activation energy is calculated to be 0.147 kJ/mol.
- DOI：
10.13684/j.cnki.spkj.2011.02.002
- Series：
- Subject：
- Classification Code：
O647.32
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