文献类型：期刊文献

中文题名：磷酸活化法活性炭性质对亚甲基蓝吸附能力的影响

英文题名：Effects of the Properties of Phosphoric Acid-activated Carbon on Adsorption Capacity of Methylene Blue

作者：左宋林[1] 刘军利[2] 杨建校[1] 蔡旋[1]

第一作者：左宋林

机构：[1]南京林业大学化学工程学院,江苏南京210037;[2]中国林业科学研究院林产化学工业研究所 生物质化学利用国家工程实验室 国家林业局林产化学工程重点开放性实验室 江苏省生物质能源与材料重点实验室,江苏南京210042

年份：2010

卷号：30

期号：4

起止页码：1-6

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：国家自然科学基金资助项目(30671651,30972317)

语种：中文

中文关键词：磷酸;活性炭;亚甲基蓝;吸附

外文关键词：phosphoric acid; activated carbon; methylene blue; adsorption

分类号：TQ424

摘要：在空气、氮气和水蒸气3种气氛下,以杉木为原料分别制备了4种磷酸活化法活性炭。考察了活性炭的表面官能团和孔隙结构对亚甲基蓝吸附能力的影响。根据氮气吸附等温线分析了活性炭的孔隙结构,采用Boehm酸碱滴定方法测定了活性炭的表面官能团含量,并测定了活性炭的亚甲基蓝吸附等温线。结果表明：活性炭的孔隙越发达,其亚甲基蓝吸附能力越强。提高活性炭的表面官能团含量,一方面有利于亚甲基蓝分子以更紧密的排列方式被活性炭所吸附,促进吸附;另一方面,对活性炭中吸附亚甲基蓝分子有效的孔隙可能产生屏蔽作用,不利于吸附。当活性炭的表面官能团含量提高时,对于中孔发达的活性炭,前者占优势,亚甲基蓝吸附量增加;而对于微孔活性炭,后者则占优势,亚甲基蓝吸附量减少。
Activated carbons of China fir（Cunninghamia lanceolata） wood origin were prepared from phosphoric acid activation in atmospheres of air, nitrogen and steam respectively, and the effects of the properties of activated carbon on the adsorption capacity of methylene blue were investigated. Porous texture of activated carbon was analyzed based on the nitrogen adsorption isotherms. Surface functional groups were determined by the Boehm method, and the adsorption isotherms of methylene blue on the activated carbons were measured. The results show that activated carbon with more developed porosity has higher adsorption capacity of methylene blue. Surface functional groups on activated carbons, especially strong acid groups, play two roles in adsorbing methylene blue. Surface functional groups facilitate the arrangement of methylene blue molecules at a more compact way on activated carbon and thus produce a positive effect on the adsorption of methylene blue. On the other hand, they can screen to some degree parts of pores that are originally accessible to methylene blue molecules and thus suppress the adsorption. Consequently, an increased concentration of surface functional groups may produce an increase in the adsorption capacity of methylene blue for the activated carbon with developed mesopores because the former role predominates, on the contrary, a decrease for the microporous activated carbon because the latter role predominates.