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现代化工  2020, Vol. 40 Issue (5): 137-142    DOI: 10.16606/j.cnki.issn0253-4320.2020.05.031
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
新型磁性氧化石墨烯的制备及其对Cd2+的吸附性能
鲁逸飞1, 王黎1,2, 李钰琦1, 覃刘平1, 余杨1
1. 武汉科技大学资源与环境工程学院, 湖北 武汉 430081;
2. 武汉科技大学环境污染绿色控制与修复技术研究中心, 湖北 武汉 430081
Preparation of novel magnetic graphene oxide and its adsorption properties for Cd2+
LU Yi-fei1, WANG Li1,2, LI Yu-qi1, QIN Liu-ping1, YU Yang1
1. School of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;
2. Research Center of Green Control and Restoration Technology for Environmental Pollution, Wuhan University of Science and Technology, Wuhan 430081, China
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摘要 通过对改良Hummers法制备的氧化石墨烯(GO)进行磁性负载得到一种磁性氧化石墨烯(MGO),并通过β-环糊精改性制备了一种功能化磁性氧化石墨烯(MGO/CD),研究了MGO/CD对水体中Cd2+的吸附性能。通过形貌表征可以看出,GO被成功磁性负载,并接枝上了β-环糊精;磁强振动仪测试表明,MGO/CD的饱和磁化强度达到67.55 emu/g,吸附材料的磁性能良好。吸附实验表明,在温度为303 K,吸附量随着pH的升高而增大,最高可达到193.8 mg/g,吸附过程符合Langmuir等温吸附模型与准二级动力学模型。外加磁场分离并重复利用5次,MGO/CD的吸附率依然稳定在93%以上,是一种对Cd2+吸附性能优良的吸附剂。
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鲁逸飞
王黎
李钰琦
覃刘平
余杨
关键词:  氧化石墨烯  磁性吸附剂  镉离子  重复利用性    
Abstract: A kind of magnetic graphene oxide (MGO) is obtained by magnetic loading with graphene oxide (GO) that is prepared by the modified Hummers method,and then modified by β-cyclodextrin to obtain a kind of functional magnetic graphene oxide (MGO/CD).The absorption property of MGO/CD to Cd2+ in wastewater is studied.Morphological characterization shows that GO is successfully magnetic-loaded,and grafted with β-cyclodextrin.Magnetomer characterization shows that the saturation magnetization of MGO/CD reaches 67.55 emu·g-1,which proves that MGO/CD has a high magnetic performance.The adsorption experiments show that the adsorption capacity of MGO/CD increases with the rising pH values at 303 K,and reaches the maximum adsorption capacity 193.68 mg·g-1 at pH=8.The adsorption process well accords with Langmuir isotherm adsorption model and pseudo-second-order kinetics model.Desorption experiments by magnetic separation indicate that the adsorption rate of MGO/CD remains above 93% after it has been employed for 5 cycles.MGO/CD is an adsorbent with excellent adsorption properties for Cd2+.
Key words:  graphene oxide    magnetic adsorbent    cadmium ion    reusability
收稿日期:  2019-07-26      修回日期:  2020-03-06          
ZTFLH:  X522  
基金资助: 湖北省技术创新专项(2019ACA152)
通讯作者:  王黎(1960-),男,博士,教授,研究方向为矿冶废弃物化学处理与有价金属回收,通讯联系人,wangliwkd@163.com。    E-mail:  wangliwkd@163.com
作者简介:  鲁逸飞(1994-),男,硕士研究生,研究方向为水处理技术,luizfly@sina.com
引用本文:    
鲁逸飞, 王黎, 李钰琦, 覃刘平, 余杨. 新型磁性氧化石墨烯的制备及其对Cd2+的吸附性能[J]. 现代化工, 2020, 40(5): 137-142.
LU Yi-fei, WANG Li, LI Yu-qi, QIN Liu-ping, YU Yang. Preparation of novel magnetic graphene oxide and its adsorption properties for Cd2+. Modern Chemical Industry, 2020, 40(5): 137-142.
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https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2020.05.031  或          https://www.xdhg.com.cn/CN/Y2020/V40/I5/137
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