劳氏紫功能化磁纳米材料对Hg(Ⅱ)的吸附性能  

Adsorption Properties of Thionin Functionalized Magnetic Nanomaterial for Hg(Ⅱ)

作　　者：吴春来 彭传云 卫应亮 张少文 WU Chunlai;PENG Chuanyun;WEI Yingliang;ZHANG Shaowen(School of Environmental Engineering and Chemistry,Luoyang Institute of Science and Technology,Luoyang 471023,China)

机构地区：[1]洛阳理工学院环境工程与化学学院,河南洛阳471023

出　　处：《水处理技术》2020年第7期20-25,共6页Technology of Water Treatment

基　　金：河南省科技攻关计划项目(182102311049);河南省高等学校重点科研项目(18B150014);洛阳理工学院高层次人才科研启动项目(2017BZ14)。

摘　　要：为提高纳米材料对Hg(Ⅱ)的吸附性能,采用化学键合方法制备了劳氏紫功能化磁性纳米材料,对其进行了表征,并用于水中Hg(Ⅱ)的吸附研究。结果表明,劳氏紫基团成功修饰到Fe3O4@SiO2表面;所制备材料以Fe3O4为核,SiO2为壳的结构,粒径约为220 nm。在pH=6时,吸附可在30 min内达到平衡;吸附过程符合准2级动力学方程和Langmuir吸附等温模型,属于单分子层吸附,最大吸附量为77.04 mg/g;材料可循环使用10次以上,且吸附率无显著降低,具有较好的再生性能。该材料能有效吸附水体中的Hg(Ⅱ),具有吸附量大、可再生、分离快速等优点,在Hg(Ⅱ)污染水体治理及生态环境保护等方面有较好的使用前景。In order to improve the adsorption properties of nanomaterials for Hg(Ⅱ),thionin covalently functionalized c magnetic nanomaterial was prepared by chemical bonding method,and used for Hg(Ⅱ)adsorptive removal from wastewater.The results showed that,the thionin group was successfully modified on the surface of [e-mail] prepared material had a structure of Fe3O4 as core and SiO2 as shell,and the particle size was about 220 nm.The adsorption equilibrium was 30 min at pH of 6,and the maximum adsorption capacity was 77.04 mg/g,the adsorption process accords with the pseudosecond-order kinetic equation and the Langmuir adsorption isotherm model,which was the monolayer adsorption.The material could be reused for more than ten times and the adsorption rate had no significant reduction,and had good regenerability.The material has excellent adsorption property for Hg(Ⅱ)in water,and have advantages of large adsorption capacity,renewable and fast separation,and have good application prospect in the field of mercury polluted wastewater treatment and water ecological restoration.

关 键 词：劳氏紫 磁性纳米材料 吸附剂 Hg(Ⅱ) 动力学 等温线 

分 类 号：TQ424[化学工程]