title: Adsorption of Antibiotics on Graphene and Biochar in Aqueous Solutions Induced by π-π Interactions.
abstract: The use of carbon based materials on the removal of antibiotics with high concentrations has been well studied, however the effect of this removal method is not clear on the actual concentration of environments, such as the hospital wastewater, sewage treatment plants and aquaculture wastewater. In this study, experimental studies on the adsorption of 7 antibiotics in environmental concentration of aqueous solutions by carbon based materials have been observed. Three kinds of carbon materials have shown very fast adsorption to antibiotics by liquid chromatography-tandem mass spectrometry (LC-MS-MS) detection, and the highest removal efficiency of antibiotics could reach to 100% within the range of detection limit. Surprisedly, the adsorption rate of graphene with small specific surface area was stronger than other two biochar, and adsorption rate of the two biochar which have approximate specific surface and different carbonization degree, was significantly different. The key point to the present observation were the π-π interactions between aromatic rings on adsorbed substance and carbon based materials by confocal laser scanning microscope observation. Moreover, adsorption energy markedly increased with increasing number of the π rings by using the density functional theory (DFT), showing the particular importance of π-π interactions in the adsorption process.
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Bingquan
authors.initials: B
authors.lastname: Peng
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.|Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.|School of Science, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang 311300, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Chenjing
authors.initials: C
authors.lastname: Que
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Yang
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Deng
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Deng
authors.affiliation: Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Guosheng
authors.initials: G
authors.lastname: Shi
authors.affiliation: School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Xu
authors.affiliation: Shanghai Applied Radiation Institute, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
authors.forename: Minghong
authors.initials: M
authors.lastname: Wu
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification
chemical_list: D000900:Anti-Bacterial Agents; D002606:Charcoal; D006108:Graphite; D062065:Wastewater; D014874:Water Pollutants, Chemical; C540010:biochar