通过对蔗渣纤维素进行胺化改性,合成新型三乙烯四胺基蔗渣纤维素吸附剂,并对Cr(Ⅵ)废水进行处理。根据对三乙烯四胺基蔗渣纤维素的结构和形貌表征,发现引入三乙烯四胺可以提高蔗渣纤维素的比表面积,并形成适于吸附的多孔结构。利用热力学、动力学及脱附再生实验研究其对于Cr(Ⅵ)的吸附性能。结果表明,三乙烯四胺基蔗渣纤维素对Cr(Ⅵ)的吸附效果良好,其吸附过程符合Langmuir等温方程和准二级动力学方程。而且,该吸附剂热稳定性高,可重复使用。
A new type of triethylene tetramine based bagasse cellulose adsorbent used for Cr(Ⅵ) wastewater treatment was synthesized by the amination of bagasse cellulose.According to the structural and morphological characterization of triethylene tetramine based bagasse cellulose,it was found that the introduction of triethylene tetramine can improve the specific surface area of bagasse cellulose and formed the porous structure that was suitable for adsorption.The adsorption properties of Cr(Ⅵ) were studied by thermodynamics,kinetics and desorption regeneration experiments.The results showed that the triethylene tetramine based bagasse cellulose exhibited high adsorption capacities for Cr(Ⅵ),and the adsorption process was in accordance with Langmuir isotherm equation and the pseudo second order kinetic equation.Moreover,the adsorbent had high thermal stability and good reusability.
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基金资助
国家自然科学基金项目(41061044;41461092);广西民族大学2016年研究生教育创新计划项目(gxun-chxzs2016117)
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