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材料导报  2021, Vol. 35 Issue (6): 6028-6034    https://doi.org/10.11896/cldb.19120209
  无机非金属及其复合材料 |
磁性Y/CTS/FA复合吸附剂的制备及对直接湖蓝5B的吸附
冯燕霞, 李北罡
内蒙古师范大学化学与环境科学学院,呼和浩特 010022
Preparation of Magnetic Y/CTS/FA Composite Adsorbents and Its Adsorption to Direct Lake Blue 5B
FENG Yanxia, LI Beigang
College of Chemistry and Environmental Sciences, Inner Mongolia Normal University, Hohhot 010022, China
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摘要 以燃煤电厂排放的固体废弃物粉煤灰(FA)为基质,通过负载少量壳聚糖(CTS)、稀土钇离子(Y(Ⅲ))及Fe3O4制备出一种稀土掺杂磁性复合吸附剂磁性Y/CTS/FA,利用BET、SEM-EDS、XRD、FT-IR和XPS等对FA和磁性Y/CTS/FA的表面形貌及结构等进行表征,并以初始浓度为2 300 mg/L的直接湖蓝 5B(DLB 5B)为吸附对象,详细探究了原料配比及反应时间对复合吸附剂性能的影响和吸附机理。结果表明:室温下,按原料质量比为m(FA):m(Y(Ⅲ)):m(CTS):m(Fe3O4)=10:2:2:2先将2% CTS醋酸溶液与FA反应120 min形成CTS/FA凝胶液,然后将其与Y(Ⅲ)离子反应30 min形成Y/CTS/FA凝胶液,再加入Fe3O4进行反应,所得磁性Y/CTS/FA对DLB 5B的吸附效果最佳,吸附量和去除率分别可达533 mg/g、92.7%。吸附剂对DLB 5B的吸附行为符合Langmuir模型。结合吸附染料前后吸附剂的FT-IR和XPS图谱分析结果,说明吸附剂对DLB 5B的吸附主要是物理吸附,同时兼有化学吸附。磁性Y/CTS/FA是一种对高浓度DLB 5B染料废水具有良好净化效果、可实现有效灰水分离的、绿色环保的吸附剂。
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冯燕霞
李北罡
关键词:  粉煤灰  壳聚糖  稀土离子  磁性吸附剂    
Abstract: Arare earth doped magnetic composite adsorbent, magnetic Y/CTS/FA was prepared by loading a small amount of chitosan (CTS), rare earth Y (Ⅲ) ions and Fe3O4 on the basis of solid waste fly ash (FA) from coal-fired power plant. The surface morphology and structure of FA and magnetic Y/CTS/FA were characterized by BET, SEM-EDS, XRD, FT-IR and XPS. Taking direct lake blue 5B (DLB 5B) with initial concentration of 2 300 mg/L as the adsorption object, the influence of raw material ratio and reaction conditions on the performance of composite adsorbent and the adsorption mechanism were explored in detail. The results showed that the optimal adsorption property of magnetic Y/CTS/FA to the DLB 5B was obtained with raw material mass ratio m(FA):m(Y (III)):m(CTS):m(Fe3O4)=10:2:2:2 at room temperature, where 2% CTS solution reacted with FA for 120 min to form the CTS/FA gel solution, then it reacted with the Y(III) ions for 30 min to form the Y/CTS/FA gels, Fe3O4 was added to form the final magnetic Y/CTS/FA at last, the adsorption capacity and removal rate of adsorbent to DLB 5B can reached 533 mg/g, 92.7%, respectively. The adsorption behavior of DLB 5B by the adsorbent is in accordance with Langmuir model. In addition, the results of FT-IR and XPS analysis of dye adsorbed by magnetic Y/CTS/FA before and after adsorption showed that the adsorbent to DLB 5B is mainly physical adsorption, and also has chemical adsorption. Magnetic Y/CTS/FA is a kind of environmental friendly adsorbent which has good purification effect on high concentration DLB 5B dye wastewater and can realize effective ash water separation.
Key words:  Key words fly ash    chitosan    rare earth ions    magnetic adsorbent
               出版日期:  2021-03-25      发布日期:  2021-03-23
ZTFLH:  X703  
基金资助: 国家自然科学基金(21167011);内蒙古自治区自然科学基金(2015MS0226);内蒙古师范大学自主研发项目(112129K18ZZYF006)
通讯作者:  libg@imnu.edu.cn   
作者简介:  冯燕霞,硕士研究生。主要从事生物高分子吸附剂的制备及染料废水处理的应用研究,发表论文1篇。
李北罡,教授,硕士研究生导师,内蒙古师范大学化学与环境科学学院分析化学专业硕士学位点主任。主要从事分析化学、环境分析化学、水环境材料的制备及固废的利用和污染控制化学的研究。
引用本文:    
冯燕霞, 李北罡. 磁性Y/CTS/FA复合吸附剂的制备及对直接湖蓝5B的吸附[J]. 材料导报, 2021, 35(6): 6028-6034.
FENG Yanxia, LI Beigang. Preparation of Magnetic Y/CTS/FA Composite Adsorbents and Its Adsorption to Direct Lake Blue 5B. Materials Reports, 2021, 35(6): 6028-6034.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19120209  或          http://www.mater-rep.com/CN/Y2021/V35/I6/6028
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