| Removal of Cd(II) from aqueous solution by a composite hydrogel based on attapulgite | |
| Department | 环境材料与生态化学研究发展中心 |
Wang XH(王晓焕); Wang AQ(王爱勤) ; 王爱勤 aqwang@licp.cas.cn
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| 2010 | |
| Source Publication | Environmental Technology
 |
| ISSN | 0959-3330 |
| Volume | 31Issue:7Pages:745-753 |
| Abstract | Chitosan-g-poly(acrylic acid)/attapulgite composite with 30 wt% attapulgite content was used to remove Cd(II) from aqueous solutions. The parameters influencing the adsorption were investigated. When Cd(CH3COO)2was used as the solute of the solution, the equilibrium adsorption capacity was evidently larger than that of the other three cadmium salts (Cd(NO3)2, CdCl2, CdSO4). Results from kinetic experiments showed that the rate of Cd(II) adsorption on the composite was quite fast, more than 90% of Cd(II) adsorption occurred within the initial 3 min, and the adsorption equilibrium may be reached within 10 min. The adsorption process can be well described by the pseudosecond-order kinetic model. The equilibrium adsorption isotherm was fitted for not only the Langmuir model but also the Freundlich model. Fourier transform infrared spectra before and after adsorption of Cd(II) on the composite showed that complexation was considered as the main mechanism. To evaluate the reuse value of the composite, a consecutive adsorption–desorption process was performed five times, and the results implied that the composite has the potential for regeneration and reuse. |
| Keyword | Composite Hydrogel Attapulgite Cadmium Adsorption Mechanism Thermodynamic Parameters |
| Subject Area | 功能高分子 |
| Funding Organization | 国家自然科学基金项目(20877077) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 功能复合材料组 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/126 |
| Collection | 环境材料与生态化学研究发展中心 |
| Corresponding Author | 王爱勤 aqwang@licp.cas.cn |
| Recommended Citation GB/T 7714 | Wang XH,Wang AQ,王爱勤 aqwang@licp.cas.cn. Removal of Cd(II) from aqueous solution by a composite hydrogel based on attapulgite[J]. Environmental Technology,2010,31(7):745-753. |
| APA | 王晓焕,王爱勤,&王爱勤 aqwang@licp.cas.cn.(2010).Removal of Cd(II) from aqueous solution by a composite hydrogel based on attapulgite.Environmental Technology,31(7),745-753. |
| MLA | 王晓焕,et al."Removal of Cd(II) from aqueous solution by a composite hydrogel based on attapulgite".Environmental Technology 31.7(2010):745-753. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2010317745753.pdf（975KB） | 开放获取 | License | View Application Full Text | |||
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