Kinetic simulating of Cr(VI) removal by the waste Chlorella vulgaris biomass

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	Kinetic simulating of Cr(VI) removal by the waste Chlorella vulgaris biomass
	Xie, Youping ; Li, Hang ; Wang, Xiaowei ; Ng, I.-Son ; Lu, Yinghua ; Jing, Keju ; Lu YH(卢英华) ; Jing KJ(敬科举)
刊名	http://dx.doi.org/10.1016/j.jtice.2014.02.016
	2014
关键词	Algae Biomass Biosorption Chromium Enzyme kinetics Fourier transform infrared spectroscopy Heavy metals Kinetics Microorganisms X ray photoelectron spectroscopy
英文摘要	Waste microalgae biomass, one of the most abundant residues from biodiesel production, can be used as a low-cost biosorbent for heavy metal removal. The ability and mechanism of Cr(VI) removal by lipid-extraction residue of Chlorella vulgaris were investigated in this study. The removal of Cr(VI) increased as the pH decreased from 4.0 to 0.5, or temperature increased from 15. °C to 45. °C. The Sips isotherm well-fitted the experiment data, and the maximal biosorption capacity of waste C. vulgaris biomass for total chromium was 43.3. mg/g at pH 1.5 and a temperature of 25. °C. X-ray photoelectron spectroscopy revealed that the majority of Cr(VI) bound on the biomass was reduced to Cr(III) with its subsequent partial biosorption. The results of Fourier Transform Infrared Spectrometer study indicated that both carboxyl and amino groups on the biomass were the main binding sites for Cr(VI) biosorption, while carbohydrate was mainly responsible for reduction of Cr(VI). Finally, the proposed kinetic model based on the indirect reduction mechanism well described the Cr(VI) removal behavior at various pHs (0.5-2) and temperatures (15-45. °C). ? 2014 Taiwan Institute of Chemical Engineers.
语种	英语
出版者	Taiwan Institute of Chemical Engineers
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89756]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Xie, Youping,Li, Hang,Wang, Xiaowei,et al. Kinetic simulating of Cr(VI) removal by the waste Chlorella vulgaris biomass[J]. http://dx.doi.org/10.1016/j.jtice.2014.02.016,2014.
APA	Xie, Youping.,Li, Hang.,Wang, Xiaowei.,Ng, I.-Son.,Lu, Yinghua.,...&敬科举.(2014).Kinetic simulating of Cr(VI) removal by the waste Chlorella vulgaris biomass.http://dx.doi.org/10.1016/j.jtice.2014.02.016.
MLA	Xie, Youping,et al."Kinetic simulating of Cr(VI) removal by the waste Chlorella vulgaris biomass".http://dx.doi.org/10.1016/j.jtice.2014.02.016 (2014).