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	Chromate sorption and reduction kinetics onto an aminated biosorbent
	Deng, S. ; Ting, Y. P. ; Yu, G.
	2010-05-10 ; 2010-05-10
会议名称	WATER SCIENCE AND TECHNOLOGY ; 5th World Water Congress of the International-Water-Association ; Beijing, PEOPLES R CHINA ; Web of Science
关键词	aminated biosorbent Cr(VI) removal sorption kinetics XPS spectra HEXAVALENT CHROMIUM MODIFIED BIOMASS BIOSORPTION REMOVAL ENHANCEMENT CU(II) CR(VI) IONS LEAD Engineering, Environmental Environmental Sciences Water Resources
中文摘要	A novel biosorbent, was prepared by chemically grafting of polyethylenimine (PEI) onto the fungal biomass of Penicillium chrysogenum through a two-step reaction. The modified biosorbent is favorable for the removal of anionic Cr(VI) species from aqueous solution due to the protonation of amine groups on the biomass surface. The sorption capacity for Cr(VI) increased by 7.2-fold after surface modification. Sorption kinetics results show that the pseudo-second-order kinetic model described the experimental data well. During the sorption process, X-ray photoelectron spectroscopy (XPS) was used to analyze the chromium species on the biosorbent surface and the results indicate that part of the Cr(VI) ions were reduced to Cr(III) ions which can be chelated with the amine groups on the biomass surface. The reduced Cr(III) ions formed some aggregates on the surface at higher solution pHs.
会议录出版者	I W A PUBLISHING ; LONDON ; ALLIANCE HOUSE, 12 CAXTON ST, LONDON SW1H0QS, ENGLAND
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/18938]
专题	清华大学
推荐引用方式 GB/T 7714	Deng, S.,Ting, Y. P.,Yu, G.. Chromate sorption and reduction kinetics onto an aminated biosorbent[C]. 见:WATER SCIENCE AND TECHNOLOGY, 5th World Water Congress of the International-Water-Association, Beijing, PEOPLES R CHINA, Web of Science.

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