摘要
设计了有无交互作用的2种不同类型正交实验,分析了浸渍比、活化功率等合成参数对微波辅助磷酸活化蔗渣生物质炭的亚甲基蓝值、碘值及得率的影响,并以亚甲基蓝为响应值,探讨了各制备因素及交互作用对蔗渣基生物质炭材料中孔结构的影响.结果表明,浸渍比、烘干时间、活化功率、活化时间对蔗渣炭得率的影响不大,但对亚甲基蓝值、碘值有明显影响.在4个制备因素中,浸渍比和活化功率对亚甲基蓝值的影响最大,贡献率分别为39%和37%.值得注意的是,其中浸渍比不仅对亚甲基蓝值,而且碘值有较大的影响(73%),但活化功率对碘值的基本没有影响(1%).上述结果表明,改变浸渍比能调节微波活化蔗渣基生物质炭的微、中孔比例;而调节活化功率,则可在微孔与得率相对稳定的基础上,对中孔结构进行有效调控.
Two different types of orthogonal test（ OEM） with or without interactions were designed to explore the effects of impregnation ratio,drying time,activation power and activation time on the adsorption characteristic of methylene blue and iodine on bagasse-based biochars as well as yield.Taking the adsorption capacity of methylene blue as response value,the effects of preparation conditions and their interactions on the mesopore structure of bagasse-based biochars were also studied. The experiment results indicated that the impregnation ratio,drying time,activation power and activation time were not key factors for the yield of biochars,but greatly influenced the adsorption capacity of methylene blue and iodine. Among the four preparation parameters,the adsorption capacity of methylene blue was greatly dependent on the impregnation ratio and activation power,accounting for 39% and 37%,respectively. It is noteworthy that impregnation ratio had great effect on the adsorption capacity of not only methylene blue but also iodine,accounting for 73%,while the activation power only contributed 1%. It was proposed that microporosity and mesoporosity of bagasse-based biochars can be changed by adjusting impregnation ratio during the preparation.Furthermore,adjusting the activation power can effectively control the mesopore structure based on the relative stability of the microspore and preparation yield.
出处
《环境化学》
CAS
CSCD
北大核心
2015年第11期2017-2024,共8页
Environmental Chemistry
基金
国家自然科学基金(51102136)
中国博士后科学基金(2014M560429)资助
关键词
正交实验
H3PO4活化
微波
中孔
活性炭
orthogonal experiment
H3PO4 activation
microwave
mesoporous
activated carbon
