Rapid adsorption of Pb, Cu and Cd from aqueous solutions by beta-cyclodextrin polymers | |
He, Junyong1,2; Li, Yulian1,2; Wang, Chengming3; Zhang, Kaisheng1; Lin, Dongyue1; Kong, Lingtao1; Liu, Jinhuai1 | |
刊名 | APPLIED SURFACE SCIENCE |
2017-12-31 | |
卷号 | 426期号:无页码:29-39 |
关键词 | beta-CD polymer Heavy metals Adsorption pH effects Mechanism |
ISSN号 | 0169-4332 |
DOI | 10.1016/j.apsusc.2017.07.103 |
英文摘要 | Removing heavy metals from aqueous solutions has drawn more and more attentions these years because of their serious global health challenge to human society. To develop an adsorbent with low-cost and high-efficiency for removal of heavy metals (HMs), beta-cyclodextrin (beta-CD) polymers crosslinked with rigid aromatic groups were prepared and used for lead (Pb), copper (Cu) and cadmium (Cd) removal for the first time. The negatively charged beta-CD polymers with large BET surface area were suitable to be used in HMs adsorption. The adsorption process completed in 5 min was well fit by Freundlich isotherm model and pseudo-second-order model. The intraparticle diffusion model was also appropriate to describe the adsorption of Pb, Cu and Cd on beta-CD polymer. The maximum of adsorption capacities at 25 degrees C for Pb, Cu and Cd were 196.42,164.43 and 136.43 mg/g when the initial concentration was 200 mg/L. The HMs adsorption process on the surface of beta-CD polymer was an endothermic and spontaneous process. Both of the electrostatic interaction and distribution of Pb, Cu and Cd species influenced the adsorption process at different pH values. The order of removal efficiencies in multi-com ponent adsorption for the three metal ions were Pb > Cu > Cd. The adsorption mechanisms were H+ ions on hydroxyl groups exchanged with heavy metal ions and electrostatic interactions. This study indicated that beta-CD polymers could be developed into effective adsorbents for rapid rem oval of heavy metals. (C) 2017 Elsevier B.V. All rights reserved. |
资助项目 | CASHIPS Director's Fund[YZJJ201617] ; National Key Scientific Program-Nanoscience and Nanotechnology[2011CB933700] ; National Natural Science Foundation of China[21177131] ; National Natural Science Foundation of China[61273066] ; National Natural Science Foundation of China[11205204] ; National Natural Science Foundation of China[21105001] ; National Natural Science Foundation of China[21077106] ; National Natural Science Foundation of China[61104205] |
WOS关键词 | HEAVY-METAL REMOVAL ; MULTIWALLED CARBON NANOTUBES ; MODIFIED-ACTIVATED CARBON ; INDUSTRIAL WASTE-WATER ; ZERO-VALENT-IRON ; FLUORIDE REMOVAL ; ENVIRONMENTAL-POLLUTANTS ; EFFICIENT REMOVAL ; DRINKING-WATER ; POROUS CARBON |
WOS研究方向 | Chemistry ; Materials Science ; Physics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000413658200003 |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/35800] |
专题 | 合肥物质科学研究院_中科院合肥智能机械研究所 |
通讯作者 | Kong, Lingtao |
作者单位 | 1.Chinese Acad Sci, Inst Intelligent Machines, Nanomat & Environm Detect Lab, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Dept Chem, Hefei 230026, Anhui, Peoples R China 3.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | He, Junyong,Li, Yulian,Wang, Chengming,et al. Rapid adsorption of Pb, Cu and Cd from aqueous solutions by beta-cyclodextrin polymers[J]. APPLIED SURFACE SCIENCE,2017,426(无):29-39. |
APA | He, Junyong.,Li, Yulian.,Wang, Chengming.,Zhang, Kaisheng.,Lin, Dongyue.,...&Liu, Jinhuai.(2017).Rapid adsorption of Pb, Cu and Cd from aqueous solutions by beta-cyclodextrin polymers.APPLIED SURFACE SCIENCE,426(无),29-39. |
MLA | He, Junyong,et al."Rapid adsorption of Pb, Cu and Cd from aqueous solutions by beta-cyclodextrin polymers".APPLIED SURFACE SCIENCE 426.无(2017):29-39. |
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