摘要
为选择性吸附分离水中的磺胺甲噁唑(SMX),采用纳米SiO_2为载体、SMX为模板分子合成表面分子印迹聚合物(MIP),优化制备条件,利用扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)对MIP进行表征,并考察MIP对水溶液中SMX的吸附性能.结果表明,制备MIP的最佳工艺条件为模板分子与功能单体、交联剂的摩尔比1∶8∶18、纳米SiO_20. 2 g、反应温度60℃、反应时间24 h. MIP对SMX的吸附受pH影响较大,pH介于2～4时,吸附量较大,pH大于5时,吸附量迅速下降.合成的MIP对水中SMX具有良好的特异性识别能力,吸附量达到8. 92 mg/g,是其结构类似物磺胺甲氧嘧啶和磺胺噻唑的5. 6倍和7. 0倍,可用于废水中SMX的去除或水环境样品中痕量SMX的分离富集.
In order to selectively adsorb sulfamethoxazole from water,the molecularly imprinted polymer(MIP)was synthesized by using nano-SiO 2 as support and SMX as template molecule.The preparation conditions were optimized.The as-prepared MIP was characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),and the adsorption performance of MIP for SMX aqueous solution were investigated,too.The results showed that optimum synthesis condition was obtained as follows:the molar ratio of template molecule-to-monomer-to-crosslinker was 1∶8∶18,the addition of nano-SiO 2was 0.2 g,the reaction temperature was 60℃,the reaction time was 24 h.The adsorption capacity of MIP for SMX obviously depended on pH.The adsorption amount is large at pH of 2~4,and decrease rapidly at pH more than 5.MIP exhibited specific recognition for SMX with adsorption amount of 8.92 mg/g.The adsorption capacity of SMX was 5.6 times and 7.0 times that of sulfamonomethoxine and sulfathiazole,respectively.It was concluded that the MIP could be put in application in removal of SMX in wastewater or enrichment of trace SMX from water environmental sample.
作者
曹煜
陈芳艳
高承娟
唐玉斌
CAO Yu;CHEN Fangyan;GAO Chengjuan;TANG Yubin(School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212018,China)
出处
《江苏科技大学学报（自然科学版）》
CAS
2018年第5期723-728,共6页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
张家港市社会发展项目(ZKS1510)
