摘要
利用二乙醇胺(DEA)对氯甲基化聚苯乙烯基树脂(PS-Cl)进行表面改性,制备了亲水性的PS-DEA树脂,然后以FeCl3·6H2O和FeSO4·7H2O为前驱体通过共沉淀法原位复合制备了磁性PS-DEA树脂.表征了磁性PS-DEA样品的形貌、结构以及磁性能,研究了PS-DEA和磁性PS-DEA对水溶液中Hg(Ⅱ)的吸附性能.结果表明,含有Fe3O4的磁性PS-DEA树脂的比饱和磁化强度(Ms)为0.92 A·m2/kg,磁性树脂中Fe3O4所占的质量分数为1.7%.用Langmuir等温模型拟合了PS-DEA和磁性PS-DEA对水溶液中Hg(Ⅱ)的吸附数据,计算得到最大吸附量分别为320.51和352.11 mg/g,这表明磁性纳米粒子的引入有利于提高树脂的吸附性能,这种磁性树脂有望作为吸附剂用于水处理领域.
The hydrophilic PS-DEA resins were prepared by diethanolamine（ DEA） for the surface modifier of chloromethylation polystyrene resins（ PS-Cl） . In-situ magnetic PS-DEA composites were prepared by co-pre-cipitation method with FeCl3 ·6H2 O and FeSO4 ·7H2 O as precursors. The morphology, structure and mag-netic properties of the magnetic PS-DEA samples were characterized. The adsorption properties of PS-DEA and magnetic PS-DEA for Hg（II） in aqueous solution were investigated by batch methods. The results showed that the magnetic PS-DEA with magnetic Fe3O4 were prepared. The saturation magnetization（Ms） of the mag-netic PS-DEA was 0.92 A·m2/kg, and the Fe3 O4 contents of the magnetic PS-DEA were 1.7%（ mass frac-tion） . The adsorption data of PS-DEA and magnetic PS-DEA for Hg（II） in aqueous solution were fitted using Langmuir isothermal model, respectively. The maximum adsorption capacities of PS-DEA and magnetic PS-DEA for Hg （II） were 320.51 and 352.11 mg/g, respectively, which demonstrated that the adsorption property of the PS-DEA resin was improved after introducing the magnetic nanoparticles. The obtained magnetic PS-DEA could be used as a promising magnetic adsorbent in waste water treatment.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第4期858-862,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:51061009)
甘肃省高校基本科研项目(批准号:13220)
甘肃省有色金属新材料省部共建国家重点实验室开放基金(批准号:SKL1315)资助~~
