氧化石墨烯对磺胺甲恶唑和磺胺甲基嘧啶的吸附性能研究  

Study on Adsorption of Two Sulfonamide Antibiotics by Graphene Oxide

作　　者：王栋纬 宋燕西[1,2] 冶晓凡 钱国 汪舒怡 程贞 

机构地区：[1]东华大学环境科学与工程学院,国家环境保护纺织污染防治工程技术中心,上海201620 [2]复旦大学聚合物分子工程国家重点实验室,上海200433

出　　处：《分析化学》2018年第2期211-216,共6页Chinese Journal of Analytical Chemistry

基　　金：本文系国家自然科学基金项目(No.51278095)、复旦大学聚合物分子工程国家重点实验室开放研究课题基金(No.K2014-11)、东华大学研究生创新基金(No.113-06-0019057)和东华大学大学生创新训练项目资助。

摘　　要：采用改进的Hummers法制备得到氧化石墨烯(GO),以两种磺胺类抗生素——磺胺甲恶唑(SMZ)和磺胺甲基嘧啶(SMR)为探针分子,研究了氧化石墨烯的吸附特性。利用傅立叶变换红外光谱(FT-IR)和扫描电镜(SEM)对所制备的氧化石墨烯进行表征。考察了溶液p H值、吸附时间、初始浓度对氧化石墨烯吸附性能的影响,通过吸附动力学和吸附热力学对其吸附性能进行了研究。结果表明,酸性和碱性条件有利于氧化石墨烯对SMZ和SMR的吸附,当p H=1时吸附效果最佳;氧化石墨烯对SMZ和SMR吸附平衡时间分别为100和120 min,最大吸附容量分别为138.50和96.06 mg/g;吸附行为均符合准二级动力学方程,表明此吸附过程以化学吸附为主,与Langmuir等温方程式拟合度良好。氧化石墨烯作为富集分离材料用于湖水中SMZ和SMR的富集分离,获得了较好的结果。Graphene oxide( GO) was prepared by modified Hummers method with graphite as raw materials and used as adsorbent for sulfamethoxazole( SMZ) and sulfamerazine( SMR) in aqueous solutions. The graphene oxide was characterized by fourier transform infrared( FT-IR) spectroscopy and scanning electron microscopy( SEM). The effects of p H value,adsorption time,initial concentration and temperature on the adsorption property of GO to two sulfonamide antibiotics were investigated and combined with the physical and chemical properties of two kinds of antibiotics. The result showed the maximum adsorption capacity were138.50 mg/g and 96.06 mg/g at p H = 1,adsorbent dosage of 20 mg,45℃,adsorption time of 100 min and120 min for SMZ and SMR,respectively. The adsorption data of SMZ and SMR fitted well with the Pseudosecond-order kinetics model and the Langmuir isotherm model. The adsorption properties of GO were evaluated with lake water and tap water as real samples and good results were obtained. GO could be used as enrichment and separation materials for sample pretreatment and removing pollutant in wastewater.

关 键 词：氧化石墨烯 磺胺甲恶唑 磺胺甲基嘧啶 吸附性能 

分 类 号：O647.3[理学—物理化学]