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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
2017-12-31
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Abstract

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.

Keywordbeta-CD polymer Heavy metals Adsorption pH effects Mechanism
DOI10.1016/j.apsusc.2017.07.103
WOS KeywordHEAVY-METAL REMOVAL ; MULTIWALLED CARBON NANOTUBES ; MODIFIED-ACTIVATED CARBON ; INDUSTRIAL WASTE-WATER ; ZERO-VALENT-IRON ; FLUORIDE REMOVAL ; ENVIRONMENTAL-POLLUTANTS ; EFFICIENT REMOVAL ; DRINKING-WATER ; POROUS CARBON
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[61104205] ; National Natural Science Foundation of China[21077106] ; National Natural Science Foundation of China[21105001] ; National Natural Science Foundation of China[11205204] ; National Natural Science Foundation of China[61273066] ; National Natural Science Foundation of China[21177131] ; National Key Scientific Program-Nanoscience and Nanotechnology[2011CB933700] ; CASHIPS Director's Fund[YZJJ201617] ; 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 Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000413658200003
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:93[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/35800
Collection中科院合肥智能机械研究所
Corresponding AuthorKong, Lingtao
Affiliation1.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
Recommended Citation
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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