环境工程学报2017，Vol.11Issue(9)：5195-5200,6.DOI:10.12030/j.cjee.201609022
水稻秸秆生物炭对罗丹明B的吸附与降解
Adsorption and degradation of rhodamine B by rice-straw-derived biochars
摘要
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 readers1 attention that free radicals in biochars should be carefully evaluated for their environmental roles, especially for the fate of organic contaminants.关键词
生物炭/罗丹明B/荧光光谱/吸附/降解Key words
biochar/rhodamine B/fluorescence spectroscopy/adsorption/degradation分类
资源环境引用本文复制引用
李丹,金修齐,王朋,吴敏,潘波..水稻秸秆生物炭对罗丹明B的吸附与降解[J].环境工程学报,2017,11(9):5195-5200,6.基金项目
国家自然科学基金资助项目(41473116) （41473116）
