壳聚糖磁性纳米材料的制备及对罗丹明6G吸附研究  

Preparation of Chitosan Magnetic Nanomaterials and Adsorption Studies on Rhodamine 6G

作　　者：章贞阳[1] Zhang Zhenyang(School of Materials and Chemical Engineering,Lianyungang Technical College,Lianyungang 222001,China)

机构地区：[1]连云港职业技术学院材料与化工学院,江苏连云港222001

出　　处：《山东化工》2023年第3期20-25,共6页Shandong Chemical Industry

摘　　要：制备了一种新型的壳聚糖修饰的比表面积大的磁性纳米材料,并成功应用于染料废水中罗丹明6G(R6G)的吸附。考查了几个重要的影响吸附因素的水平,pH值、吸附时间、吸附剂的用量和R6G的初始浓度对吸附的影响,进而确定磁性纳米材料对R6G吸附的最佳吸附条件。用乙醇对吸附剂洗脱进行8次重复吸附,仍具有良好的再生吸附能力。通过动力学吸附模型的考察,壳聚糖修饰的磁性纳米材料对R6G的吸附模型符合准二级动力学。热力学符合Langmuir曲线模型。在最佳条件下,饱和吸附容量为93.90 mg·g^(-1)。壳聚糖修饰磁性纳米材料对染料废水的吸附,对寻找生物基材料作为废水处理吸附剂具有潜在的现实意义。A novel chitosan-modified magnetic nanomaterial with a large specific surface area was prepared and successfully applied to the adsorption of rhodamine 6G(R6G)from dye wastewater.Several important factors affecting the level of adsorption,pH,determination of the adsorption equilibrium time,the amount of adsorbent and the initial concentration of R6G on adsorption were examined to determine the optimum adsorption conditions for the adsorption of R6G by magnetic nanomaterials.The adsorbent was eluted with ethanol for eight replicate adsorption and still had good regenerative adsorption capacity.By examining the kinetic adsorption model,the adsorption of R6G in dye wastewater by chitosan-modified magnetic nanomaterials was consistent with the pseudo second-order kinetic model.The adsorption thermodynamic curves were in accordance with the Langmuir model.The saturation adsorption capacity was 93.90 mg·g-1 under optimal conditions.The adsorption of chitosan-modified magnetic nanomaterials on dye wastewater is potentially relevant to the search for bio-based materials as adsorbents for wastewater treatment.

关 键 词：壳聚糖 磁性纳米 吸附 碱性染料 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]