XANES Investigation of Chromium Valence State in Yeast Biomass

HU Rong; WU Zi-Yu; LIU Jing; XIE Ya-Ning; HU Tian-Dou; ZHANG Jing; FENG Wei-Yue; CHAI Zhi-Fang

Chinese Physics C> 2004, Vol. 28> Issue(1) : 100-103

XANES Investigation of Chromium Valence State in Yeast Biomass

Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
Chromium valence states in yeast biomass are investigated by X-ray absorption near-edge structure spectroscopy (XANES) using an upgraded experimental method. The main advantage of this new XANES method is to record the transmission and fluorescence experimental data simultaneously in a same ion chamber. Such method is very convenient to analyze a series of unknown chromium valence state samples (e.g.relatively low Cr concentration with fluorescence mode) comparing with a standard sample (Cr₂O₃) using transmission mode, in order to avoid systematic error associated to the uncertainty of the edge energy induced by the different experimental operating condition. The experimental results show that in yeast biomass almost all Cr(Ⅵ) is reduced to Cr(Ⅲ) addressing the potential use of biomass for chromium reduction.

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HU Rong, WU Zi-Yu, LIU Jing, XIE Ya-Ning, HU Tian-Dou, ZHANG Jing, FENG Wei-Yue and CHAI Zhi-Fang. XANES Investigation of Chromium Valence State in Yeast Biomass[J]. Chinese Physics C, 2004, 28(1): 100-103.

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Received: 2003-04-10
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

XANES Investigation of Chromium Valence State in Yeast Biomass

Corresponding author: WU Zi-Yu,

Institute of High Energy Physics,CAS,Beijing 100039,China

Received Date: 2003-04-10

Accepted Date: 1900-01-01

Available Online: 2004-01-05

Abstract: Chromium valence states in yeast biomass are investigated by X-ray absorption near-edge structure spectroscopy (XANES) using an upgraded experimental method. The main advantage of this new XANES method is to record the transmission and fluorescence experimental data simultaneously in a same ion chamber. Such method is very convenient to analyze a series of unknown chromium valence state samples (e.g.relatively low Cr concentration with fluorescence mode) comparing with a standard sample (Cr₂O₃) using transmission mode, in order to avoid systematic error associated to the uncertainty of the edge energy induced by the different experimental operating condition. The experimental results show that in yeast biomass almost all Cr(Ⅵ) is reduced to Cr(Ⅲ) addressing the potential use of biomass for chromium reduction.

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XANES Investigation of Chromium Valence State in Yeast Biomass

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