海藻酸钠/羧甲基纤维素多孔气凝胶吸附阳离子染料性能的研究
Studies of the Adsorption Properties of Cationic Dyes onto Sodium Alginate/Carboxymethyl Cellulose Porous Aerogel
DOI: 10.12677/MS.2019.91014, PDF,  被引量   
作者: 张文良, 桂由刚, 唐茂文：青岛大学材料科学与工程学院，山东 青岛；夏延致：青岛大学生物多糖纤维成形与生态纺织国家重点实验室，山东 青岛
关键词: 海藻酸钠羧；羧甲基纤维素；多孔气凝胶；吸附；亚甲基蓝；Sodium Alginate； Carboxymethyl Cellulose； Porous Aerogel； Adsorption； Methylene Blue
摘要: 采用环氧氯丙烷为交联剂，将羧甲基纤维素和海藻酸钠在水溶液中进行交联，然后通过冷冻干燥成功制备出具有多孔结构的海藻酸钠/羧甲基纤维素气凝胶(SA/CMC)气凝胶。通过扫描电子显微镜(SEM)和傅里叶变换红外光谱仪(FTIR)对其结构和形貌进行表征分析。用该气凝胶作为吸附剂处理亚甲基蓝溶液，并探究溶液pH、接触时间、温度和吸附剂加入量等因素对SA/CMC多孔气凝胶吸附亚甲基蓝的影响。研究结果表明，SA/CMC多孔气凝胶对亚甲基蓝有很高的吸附效率，吸附等温线数据符合朗缪尔模型和弗伦德里希模型，在温度为303K时，最大吸附量为3160.49 mg/g。吸附动力学实验数据表明SA/CMC吸附亚甲基蓝符合准二级动力学模型，受化学吸附控制，是一个复杂的吸附过程。热力学参数表明该吸附过程是放热和自发进行的。
Abstract: The sodium alginate/carboxymethyl cellulose (SA/CMC) with porous structure was prepared by freeze-dryingt and crosslinking method. The properties of SA/CMC were characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The SA/CMC was used as adsorbent to treat the methylene blue solution. The effects of solution pH, contact time, temperature and amount of adsorbent on the adsorption of methylene blue by SA/CMC were investigated. The results show that the SA/CMC has high adsorption efficiency for methylene blue. The adsorption isotherm data accord with the Langmuir model and the Friedrich model. The maximum adsorption capacity is 3160.49 mg/g at 303K. The experimental data of adsorption ki-netics indicate that it conforms to the quasi-second-order kinetic model. The adsorption process of methylene blue by SA/CMC porous aerogel is controlled by chemisorption, which is a complicated process. Thermodynamic parameters indicate that the adsorption process is exothermic and spontaneous.
文章引用：张文良, 夏延致, 桂由刚, 唐茂文. 海藻酸钠/羧甲基纤维素多孔气凝胶吸附阳离子染料性能的研究[J]. 材料科学, 2019, 9(1): 104-114. https://doi.org/10.12677/MS.2019.91014

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