摘要
通过对4种木屑活性炭样品的吸附性能测定和微结构表征,表明活性炭对木糖醇溶液的脱色效果与亚甲基蓝吸附能力的大小密切相关,但亚甲基蓝吸附值不是决定活性炭对木糖醇溶液中色素杂质吸附的唯一因素。中孔的数量是影响活性炭对木糖醇溶液中色素杂质吸附的重要因素,尤其是尺寸为2~14 nm的中孔的数量对木糖醇溶液中色素杂质吸附的影响比较大。红外光谱分析显示表面官能团C—O的存在会促进活性炭对木糖醇溶液中色素杂质的吸附。
Adsorption performance and microstructure were studied using four different sawdust activated carbons.It was indicated that the adsorption value of methyleneblue had great effect on the activity of activated carbons for decoloring xylitol solution.However,it was not the only factor.The number of activated carbons′ mesopores,especially the size range of 2-14 nm,impacted greatly the decoloration performance of xylitol solution.The FT-IR analyses of the activated carbons showed that the presence of surface C—O functionality might promote the adsorption.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2011年第4期41-45,共5页
Chemistry and Industry of Forest Products
基金
林业公益性行业专项(201004051)
浙江省院合作林业科技项目(2009-07)
关键词
木屑活性炭
木糖醇溶液
吸附等温线
微结构
sawdust activated carbon
xylitol solution
adsorption isotherm
microstructure