摘要
以黄腐酸(FA)为功能单体,Ni^(2+)为模板,Fe_3O_4/SiO_2为磁核,成功制备了新型离子印迹磁球(Fe_3O_4/SiO_2/FA)。研究结果表明:当水溶剂总体积为50mL时,其最佳制备工艺条件是:Fe_3O_4/SiO_2为1g,KH-560为1.2mL,FA(0.01g/mL)为30mL,NiCl_2·6H_2O(0.03g/mL)为12mL,反应温度为60℃。在Cr^(3+)和Pb^(2+)竞争离子存在条件下,相对选择性系数Ni^(2+)/Cr3+、Ni^(2+)/Pb^(2+)分别是221.44和609.72,表明Fe_3O_4/SiO_2/FA对Ni^(2+)离子具有较高的选择识别能力;经过5次吸附-脱附实验后,离子印迹磁球仍然具有较好的吸附使用性能。
A novel ion-imprinted magnetic ball（ Fe_3O_4/SiO_2/ FA） is prepared with fulvic acid as a functional monomer,Ni^（2＋） as a template and Fe_3O_4/SiO_2 as the core. The imprinted polymer is characterized by FT-IR,TG and laser particle size analyzer. The adsorption performance of Fe_3O_4/SiO_2/ FA is also evaluated. When the dosage of aqueous solvent is 50 m L,the optimized conditions are： 1 g of Fe_3O_4/SiO_2,1. 2 m L of KH-560,30 m L of FA（ 0. 01 g/m L）,12 m L of NiCl_2·6H_2O（ 0. 03 g / m L） and 60℃ of reaction temperature. In presence of competitive ions such as Cr^（3＋） and Pb^（2＋）,the relative selectivity coefficient of Ni^（2＋）/Cr^（3＋） and Ni^（2＋）/ Pb^（2＋） is 221. 44 and 609. 72,respectively,indicating that Fe_3O_4/SiO_2/ FA have a high selective recognition ability for Ni^（2＋） ion. The ion-imprinted magnetic ball still has good adsorption performance after five adsorption-desorption experiments.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第5期57-60,62,共5页
Modern Chemical Industry
基金
河北省自然科学基金(B2014209200)
国家大学生创新训练计划(201510081024)
关键词
离子印迹
黄腐酸
镍离子
吸附性能
imprinted polymer
fulvic acid
nickel ion
adsorption performance
