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材料导报  2022, Vol. 36 Issue (21): 21060259-7    https://doi.org/10.11896/cldb.21060259
  无机非金属及其复合材料 |
磁性壳聚糖吸附剂的季铵盐改性及磷吸附性能
朋许杰1, 李建军1,2,*, 曹瑞昌1, 戎鑫1, 李梦1, 刘银2
1 安徽理工大学材料科学与工程学院,安徽 淮南 232001
2 安徽理工大学安徽省纳米碳基材料与环境健康国际联合研究中心,安徽 淮南 232001
Magnetic Chitosan Modified by Quaternary Ammonium Salt and Its Phosphorus Adsorption
PENG Xujie1, LI Jianjun1,2,*, CAO Ruichang1, RONG Xin1, LI Meng1, LIU Yin2
1 School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
2 Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health, Anhui University of Science and Technology, Huainan 232001, Anhui, China
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摘要 为提升吸附剂的固-液分离效率及磷吸附选择性,以粉煤灰磁珠(CMS)为磁核,以甲基丙烯酰丙基三甲基氯化铵(MAPTAC)改性的壳聚糖(CS)为壳层材料,制备了磁性CMS/CS/MAPTAC吸附剂。利用热重分析、X射线衍射、振动样品磁强计、扫描电镜、红外光谱仪和X射线光电子能谱对CMS/CS/MAPTAC进行了系统表征。研究表明,CMS颗粒均匀分布于CS基体中,MAPTAC以化学键形式与CS结合。所得CMS/CS/MAPTAC具有16.8 emu/g的强磁性,因而可利用磁场实现高效固-液分离。磷吸附试验表明,CMS/CS经MAPTAC修饰后,磷吸附性能大幅提升。在pH=4.0,25 ℃条件下,其最大磷吸附容量可达50.7 mg/g。溶液pH、时间、浓度、温度和共存阴离子等因素对磷吸附性能具有显著影响。吸附动力学和等温线模拟表明,CMS/CS/MAPTAC的磷吸附过程符合准二级动力学模型和Langmuir等温吸附模型,以单分子层化学吸附为主。经过五次循环利用后,CMS/CS/MAPTAC仍保留60%以上的磷吸附性能。
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朋许杰
李建军
曹瑞昌
戎鑫
李梦
刘银
关键词:  磁性吸附剂  除磷  粉煤灰磁珠  壳聚糖  季铵盐改性    
Abstract: To improve the solid-liquid separation efficiency and selective adsorption of phosphorus sorbent, magnetic CMS/CS/MAPTAC composites were prepared, using coal-fly-ash magnetic spheres (CMS) and chitosan (CS) modified by methacrylamido propyl trimethyl ammonium chloride (MAPTAC) as magnetic core and shell, respectively. Thermogravimetry analysis, X-ray diffraction, vibration sample magnetometer, scanning electron microscopy, infrared spectroscopy and X-ray photoelectron spectroscopy were employed to characterize the obtained CMS/CS/MAPTAC. It is shown that CMS is uniformly distributed in the CS matrix. MAPTAC is modified onto the surface of CS by chemical bonds. The CMS/CS/MAPTAC sample has strong magnetism up to 16.8 emu/g, which enables an efficient solid-liquid separation under an applied magnetic field. Phosphorus adsorption experiments indicate that the loading of MAPTAC on the surface of CMS/CS improves the phosphorus adsorption performance. The maximum phosphorus adsorption capacity of 50.7 mg/g was obtained under the conditions of pH=4.0 and 25 ℃. The reaction time, pH, phosphate concentration, temperature and coexisting anions have significant effects on the phosphorus adsorption. The adsorption kinetics and adsorption thermodynamics simulation suggests that the phosphorus adsorption of CMS/CS/MAPTAC conforms to the pseudo-second-order model and Langmui-iso-absorbing model. Thus, the adsorption should mainly belong to monolayer chemisorption. The CMS/CS/MAPTAC adsorbent can be recycled and reused multiple times. After 5 recycling, the phosphorus adsorption was still more than 60% of that initial sample.
Key words:  magnetic adsorbent    phosphorus removal    coal-fly-ash magnetic sphere    chitosan    quaternary ammonium salt modification
出版日期:  2022-11-10      发布日期:  2022-11-03
ZTFLH:  X703  
基金资助: 安徽省自然科学基金(1908085ME127);安徽理工大学环境友好材料与职业健康研究院研发专项基金(ALW2021YF11);安徽省2021年高等学校质量工程项目(2021cyxy031)
通讯作者:  * lijj3@aust.edu.cn   
作者简介:  朋许杰,安徽理工大学硕士研究生。主要从事磁性高分子吸附剂的制备及富营养化污水处理的应用研究。
李建军,安徽理工大学教授,中国煤炭学会碳中和专业技术委员会委员,中国硅酸盐学会固废与生态材料分会学术委员,安徽省硅酸盐学会理事,安徽理工大学固废资源化与生态功能材料团队首席专家。2010年毕业于北京航空航天大学材料物理与化学专业,获工学博士学位。2016—2017年在澳大利亚University of Wollongong国家超导与电子材料研究所访学。主要研究方向:煤基固废资源化、磁分离技术及水处理。承担国家级、省部级科研项目12项,承担横向项目5项。发表研究论文40余篇,其中SCI收录30余篇;授权国家发明专利9项,获省部级教学科研奖4项。
引用本文:    
朋许杰, 李建军, 曹瑞昌, 戎鑫, 李梦, 刘银. 磁性壳聚糖吸附剂的季铵盐改性及磷吸附性能[J]. 材料导报, 2022, 36(21): 21060259-7.
PENG Xujie, LI Jianjun, CAO Ruichang, RONG Xin, LI Meng, LIU Yin. Magnetic Chitosan Modified by Quaternary Ammonium Salt and Its Phosphorus Adsorption. Materials Reports, 2022, 36(21): 21060259-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21060259  或          http://www.mater-rep.com/CN/Y2022/V36/I21/21060259
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