title: Adsorptive removal of trace sulfonamide antibiotics by water-dispersible magnetic reduced graphene oxide-ferrite hybrids from wastewater.
abstract: A one-pot solvothermal synthesis method was developed to prepare reduced graphene oxide (RGO) supported ferrite hybrids using graphite oxide and metal ions (Fe(3+)) as starting materials. The as-prepared composites were characterized by transmission electron microscopy(TEM), Fourier transform infrared spectrophotometer (FT-IR), X-ray powder diffraction pattern(XRD) and vibrating sample magnetometer (VSM). It was shown that Fe3O4 nanoparticles with a uniform size of ∼35nm were anchored on RGO nanosheets. Importantly, the obtained nanocomposites are effective adsorbents for the determination of three sulfonamides in wastewater. Several parameters affecting the extraction efficiency were optimized, including amount of adsorbent, extraction time, pH and desorption conditions. Compared with other adsorbents, the as-prepared RGO-Fe3O4 showed the better extraction efficiencies for the SAS due to the large surface area of RGO. A linear range from 1 to 200ng/mL was obtained with a high correlation coefficient (R(2)>0.9987), and the limits of detection for three SAs ranged from 0.43 to 0.57ng/mL. This method was successfully applied to the analysis of SAs in environmental wastewater samples, the recoveries in different sample matrices were in the range from 89.1 and 101.7% with relative standard deviations less than 8.6%. It is believed that such composites will find wide applications in the water pretreatment area.
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Nanjing 210009, China.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Hygienic Analysis and Detection, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Nanjing 210009, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Chen
authors.affiliation: Faculty of Pharmacy, University of Paris V, 4 Avenue de l'Observatoire, 75006 Paris, France.
authors.forename: Chuong
authors.initials: C
authors.lastname: Pham-Huy
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Nanjing 210009, China.
authors.forename: Xuanhong
authors.initials: X
authors.lastname: Hui
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, 24 Tongjia Lane, Nanjing 210009, China; Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China. Electronic address: jcb315@163.com.
authors.forename: Hua
authors.initials: H
authors.lastname: He
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000302:isolation & purification*; D006108:Graphite / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D013449:Sulfonamides / Q000302:isolation & purification*; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D006108:Graphite; D058185:Magnetite Nanoparticles; D010087:Oxides; D013449:Sulfonamides; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Adsorption; Environmental wastewater samples; Magnetic reduced graphene oxide; Sulfonamide antibiotics