Fe_3O_4/纤维素磁性纳米材料对亚甲基蓝的吸附性能研究
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摘要
以纤维素和氯化亚铁为主要原料,制备了一种新型的磁性纳米复合材料,用于吸附水溶液中的亚甲基蓝,探索了Fe_3O_4与纤维素的质量比、反应时间、吸附剂用量、亚甲基蓝初始浓度等对材料吸附性能的影响。结果表明,Fe_3O_4/纤维素复合材料吸附亚甲基蓝的最佳条件为:2 mL初始浓度10 mg/L的亚甲基蓝废水,Fe_3O_4/纤维素质量比为1∶8,吸附剂用量为8 mg,吸附反应时间为10 min。在此条件下,Fe_3O_4/纤维素复合材料对亚甲基蓝的去除率可达91%。Fe_3O_4/纤维素复合材料吸附亚甲基蓝的过程符合Langmuir模型。该新型复合材料的吸附性能和磁性能有力的结合,使其具有易分离、易回收且能够循环利用的特点。同时,该材料制作成本低、适宜大规模生产。
A new kind of magnetic nanocomposites was prepared by using cellulose and ferrous chloride as the main raw materials,which was used to adsorb methylene blue in an aqueous solution. The effects of the mass ratio of Fe_3O_4 to cellulose,the adsorption time,the amount of adsorbent and the initial concentration of methylene blue on the adsorption of Fe_3O_4 were studied. The result showed that the optimized experiment was carried out to adsorb methylene blue by Fe_3O_4/cellulose composites: 2 m L methylene blue wastewater with an initial concentration of 10 mg/L,the mass ratio of Fe_3O_4/cellulose was 1∶ 8,adsorbent dosage was 8 mg and the adsorption reaction time was 10 min. Under this condition,the removal rate of methylene blue by Fe_3O_4/cellulose composites can reach 91%. The adsorption of methylene blue by Fe_3O_4/cellulose composites is consistent with the Langmuir model. The combination of adsorption and magnetic properties of the new composite material makes it easy to separate,easy to recycle and recyclable. At the same time,the material is low in production cost and suitable for mass production.
A new kind of magnetic nanocomposites was prepared by using cellulose and ferrous chloride as the main raw materials,which was used to adsorb methylene blue in an aqueous solution. The effects of the mass ratio of Fe_3O_4 to cellulose,the adsorption time,the amount of adsorbent and the initial concentration of methylene blue on the adsorption of Fe_3O_4 were studied. The result showed that the optimized experiment was carried out to adsorb methylene blue by Fe_3O_4/cellulose composites: 2 m L methylene blue wastewater with an initial concentration of 10 mg/L,the mass ratio of Fe_3O_4/cellulose was 1∶ 8,adsorbent dosage was 8 mg and the adsorption reaction time was 10 min. Under this condition,the removal rate of methylene blue by Fe_3O_4/cellulose composites can reach 91%. The adsorption of methylene blue by Fe_3O_4/cellulose composites is consistent with the Langmuir model. The combination of adsorption and magnetic properties of the new composite material makes it easy to separate,easy to recycle and recyclable. At the same time,the material is low in production cost and suitable for mass production.
引文
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[16]高淑玲,杨翠玲,罗鑫圣,等.坡缕石黏土污泥对水相中亚甲基蓝吸附研究[J].中国环境科学,2014,34(1):78-84.
[2]郭延辉,樊静,王建玲,等.树脂固载纳米铁对偶氮染料直接湖蓝5B的脱色性能研究[J].环境工程学报,2010,4(2):337-341.
[3]陈君良,姚屠鹏,朱宏亮,等.巯基功能化纳米Fe3O4-高分子磁性复合材料的合成及其对水中亚甲基蓝的吸附作用[J].复合材料学报,2014,31(2):323-330.
[4]鲍晓磊,强志民,贲伟伟,等.磁性纳米复合材料Co Fe M48对水中磺胺类抗生素的吸附去除研究[J].环境科学学报,2013,33(2):401-407.
[5] Qiang Zhimin,Bao Xiaolei,Ben Weiwei. MCM-48 modified magnetic mesoporous nanocomposite as an attractive adsorbent for the removal of sulfamethazine from water[J]. Water Research,2013,47:4107-4114.
[6] Ai Lunhong,Zhang Chunying,Liao Fang,et al. Removal of methylene blue from aqueous solution with magnetite loaded multi-wall carbon nanotube:Kinetic,isotherm and mechanism analysis[J]. Journal of Hazardous Materials,2011,198:282-290.
[7] Abbas Afkhami,Mohammad Saber-Tehrani,Hasan Bagheri. Modified maghemite nanoparticles as an efficient adsorbent for removing some cationic dyes from aqueous solution[J]. Desalination,2010,263:240-248.
[8] Chang Yangchuang,Chen Donghang. Adsorption kinetics and thermodynamics of acid dyesonacarboxymethylated chitosan-conjugated magnetic nano-adsorbent[J]. Macromolecular Bioscience,2005(5):254-261.
[9]赵静,刘勇健.磁流体在印染废水处理中的应用研究[J].环境科学与管理,2008,33(5):118-120.
[10]张晓蕾,陈静,韩京龙,等.壳-核结构Fe3O4/MnO2磁性吸附剂的制备、表征及铅吸附去除研究[J].环境科学学报,2013,33(10):2730-2736.
[11] Zhang Yuanyuan,Xu Qiang,Zhang Shengxiao,et al. Preparation of thiol-modified Fe3O4@Si/O2nanoparticles and their application for gold recovery from dilute solution[J]. Separation and Purification Technology,2013(11):391-397.
[12] Ditsch A,Laibinis P E,Wang D I C,et al. Controlled clustering and enhanced stability of polymer-coated magnetic nanoparticles[J]. Langmuir,2005,21(13):6006-6018.
[13]吴崇浩,王世敏.纳米微料表面修饰的研究进展[J].化工新型材料,2002,30(7):1-5.
[14]邓述波,余刚.环境吸附材料及应用原理[M].北京:科学出版社,2012.
[15]姚超,刘敏,李为民,等.凹凸棒石/氧化锌纳米复合材料对亚甲基蓝的吸附性能[J].环境科学学报,2010,30(6):1211-1219.
[16]高淑玲,杨翠玲,罗鑫圣,等.坡缕石黏土污泥对水相中亚甲基蓝吸附研究[J].中国环境科学,2014,34(1):78-84.