Adsorption and degradation of rhodamine B by rice-straw-derived biochars

LI Dan; JIN Xiuqi; WANG Peng; WU Min; PAN Bo

doi:10.12030/j.cjee.201609022

2017 Volume 11 Issue 9

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Abstract

References

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LI Dan, JIN Xiuqi, WANG Peng, WU Min, PAN Bo. Adsorption and degradation of rhodamine B by rice-straw-derived biochars[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5195-5200. doi: 10.12030/j.cjee.201609022

Citation:

LI Dan, JIN Xiuqi, WANG Peng, WU Min, PAN Bo. Adsorption and degradation of rhodamine B by rice-straw-derived biochars[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5195-5200. doi: 10.12030/j.cjee.201609022

Adsorption and degradation of rhodamine B by rice-straw-derived biochars

1.
Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming 650500, China

Received Date: 17/10/2016
Accepted Date: 02/09/2016
Available Online: 26/08/2017

Fund Project:

Abstract

Biochars have attracted international research attention because of their wide application potential, including their high sorption to organic contaminants, which will benefit pollutant control. In biochar sorption studies, investigators generally ignored the interactions between organic contaminants and free radicals in biochars. Thus, the behavior of organic contaminants was not fully understood in the presence of biochars. This study used rice straw to produce biochars. The interactions between biochars and rhodamine B were investigated with the emphasis of identifying sorption and degradation. When analyzing rhodamine B in the solution using fluorescence spectrometer, blue shift of the absorbance was clearly observed in the presence of biochars. This phenomenon suggested significant chemical alteration of rhodamine B molecules. Through the organic solvent extraction of the solid particles, the real sorption could be quantified. In the common sorption experimental design, degradation accounted for 28% and 30% of the apparently decreased aqueous-phase concentration. Rhodamin B degradation could be calculated through mass balance calculation. The Freundlich equation can describe well the adsorption behavior of rice straw biomass carbon on rhodamine B in water, and the maximum adsorption capacity of biochar is 3.33 mg·g-1 at 3:1 000.This study calls the readers' attention that free radicals in biochars should be carefully evaluated for their environmental roles, especially for the fate of organic contaminants.
- biochar,
- rhodamine B,
- fluorescence spectroscopy,
- adsorption,
- degradation

References

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沈阳化工大学材料科学与工程学院沈阳 110142

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Adsorption and degradation of rhodamine B by rice-straw-derived biochars

Received Date: 17/10/2016

Accepted Date: 02/09/2016

Available Online: 26/08/2017

Fund Project:

Key words:

Abstract: Biochars have attracted international research attention because of their wide application potential, including their high sorption to organic contaminants, which will benefit pollutant control. In biochar sorption studies, investigators generally ignored the interactions between organic contaminants and free radicals in biochars. Thus, the behavior of organic contaminants was not fully understood in the presence of biochars. This study used rice straw to produce biochars. The interactions between biochars and rhodamine B were investigated with the emphasis of identifying sorption and degradation. When analyzing rhodamine B in the solution using fluorescence spectrometer, blue shift of the absorbance was clearly observed in the presence of biochars. This phenomenon suggested significant chemical alteration of rhodamine B molecules. Through the organic solvent extraction of the solid particles, the real sorption could be quantified. In the common sorption experimental design, degradation accounted for 28% and 30% of the apparently decreased aqueous-phase concentration. Rhodamin B degradation could be calculated through mass balance calculation. The Freundlich equation can describe well the adsorption behavior of rice straw biomass carbon on rhodamine B in water, and the maximum adsorption capacity of biochar is 3.33 mg·g-1 at 3:1 000.This study calls the readers' attention that free radicals in biochars should be carefully evaluated for their environmental roles, especially for the fate of organic contaminants.

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Adsorption and degradation of rhodamine B by rice-straw-derived biochars

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References

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通讯作者: 陈斌, bchen63@163.com

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