Study on Adsorption of Two Sulfonamide Antibiotics by Graphene Oxide / 分析化学

ABSTRACT

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 pH 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 were 138.50 mg/g and 96.06 mg/g at pH=1,adsorbent dosage of 20 mg,45℃,adsorption time of 100 min and 120 min for SMZ and SMR,respectively.The adsorption data of SMZ and SMR fitted well with the Pseudo-second-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.