Kinetics and adsorption behavior of carboxymethyl starch on alpha-alumina in aqueous medium
文献类型：期刊论文
| 作者 | Chen, Yanxiao; Liu, Shaoying; Wang, Gongying |
| 刊名 | Journal of colloid and interface science
 |
| 出版日期 | 2006-11-15 |
| 卷号 | 303期号:2页码:380-387 |
| ISSN号 | 0021-9797 |
| 关键词 | Carboxymethyl starch Alumina Zeta potential Adsorption isotherm Kinetic model |
| DOI | 10.1016/j.jcis.2006.08.011 |
| 通讯作者 | Wang, gongying(gywang@cioc.ac.cn) |
| 英文摘要 | The adsorption of carboxymethyl starch (cms) at the alpha-alumina/aqueous solution interface has been investigated through adsorption studies, electrokinetics mobility measurements, and ftir spectroscopy. zeta potential measurements show that the addition of cms results in a more dramatic increase in the absolute zeta potential in the alkaline region, as well as a shift of the isoelectric point to lower values, indicating the adsorption of cms from the aqueous solution onto the alumina surface. the positive hydrophilic surface sites of alumina are responsible for the adsorption of cms molecules. the adsorption of cms is possible after charge reversal by the addition of excess cms. nearly 30 min of contact time are found to be sufficient for the adsorption of cms to reach equilibrium. cms adsorption follows a langmuir isotherm with adsorption capacities of 91.74 mg cms per gram of alpha-alumina. for the adsorption of cms, pseudo-second-order chemical reaction kinetics provides the best correlation with the experimental data. ftir analysis indicated that cms forms outer complexes with alumina surfaces depending on the shifting of the asymmetric and symmetric bands. (c) 2006 elsevier inc. all rights reserved. |
| WOS关键词 | POLYACRYLIC-ACID ; WATER INTERFACE ; MOLECULAR-WEIGHT ; FLOCCULATION ; SUSPENSIONS ; COPOLYMERS ; DISPERSION ; PARTICLES ; OXIDE |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| WOS记录号 | WOS:000241771500007 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379650 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, Gongying |
| 作者单位 | 1.Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yanxiao,Liu, Shaoying,Wang, Gongying. Kinetics and adsorption behavior of carboxymethyl starch on alpha-alumina in aqueous medium[J]. Journal of colloid and interface science,2006,303(2):380-387. |
| APA | Chen, Yanxiao,Liu, Shaoying,&Wang, Gongying.(2006).Kinetics and adsorption behavior of carboxymethyl starch on alpha-alumina in aqueous medium.Journal of colloid and interface science,303(2),380-387. |
| MLA | Chen, Yanxiao,et al."Kinetics and adsorption behavior of carboxymethyl starch on alpha-alumina in aqueous medium".Journal of colloid and interface science 303.2(2006):380-387. |
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来源：中国科学院大学
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