化学修饰对花生壳吸附染料能力的影响

通过逐一对花生壳的氨基、羧基、羟基等重要官能团进行化学修饰,研究了他们在离子型染料吸附中的作用.吸附实验结果表明:在六种染料的吸附过程中羟基都起着重要作用;羧基阻碍阴离子染料的吸附,但却是阳离子染料吸附的主要官能团;氨基甲基化对六种染料的吸附的影响不显著.花生壳化学修饰前后的红外光谱和X-衍射图谱也出现相应的变化.

Effect of Chemical Modification on Dye Adsorption Capacity of Peanut Hull

In this study,the roles of three major functional groups,i.e.amino,carboxyl,and hydroxyl groups in the biomass of peanut hull in biosorption of six dyes,methylene blue(MB),brilliant cresyl blue(BCB),neutral red(NR),amaranth(Am),sunset yellow(SY) and fast green FCF(FG) were investigated. These functional groups in peanut hull were chemically modified individually in order to determine their contribution to the biosorption of ionic dyes.Batch experiments were performed with raw and modified biomass and suggested that hydroxyl group played a significant role in the binding of all six dyes,carboxyl group inhibited the adsorption of anionic dyes but it was major functional group in the adsorption of cationic dyes and the effect of methylation of amino grou was not significant in the adsorption of six dyes.After chemical modification,some relevant changes could also been found in IR spectra and XRD diagrams of modified sorbents.