title: Study of ciprofloxacin adsorption and regeneration of activated carbon prepared from Enteromorpha prolifera impregnated with H3PO4and sodium benzenesulfonate.
abstract: Activated carbons were derived from Enteromorpha prolifera immersed in H3PO4solution or the H3PO4solution mixed with sodium benzenesulfonate (SBS), producing AC and AC-SBS. NaOH solution was employed in regeneration of ciprofloxacin (CIP)-loaded AC and AC-SBS to obtain RAC and RAC-SBS. The properties of the original and regenerated activated carbons were characterized by thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), N2adsorption/desorption isotherms and Fourier transform infrared spectroscopy (FTIR). Batched adsorption studies were carried out to compare CIP adsorption behaviors of the four carbons. The results suggested that the four samples exhibited higher proportions of mesopores and similar functional groups. Although AC displayed much higher specific surface area (SBET) (1045.79m2/g) than AC-SBS (738.03m2/g), its CIP adsorption capacity was much less than AC-SBS. The maximum adsorption capacity for AC, AC-SBS, RAC and RAC-SBS were found to be 250mg/g, 286mg/g, 233mg/g and 256mg/g, respectively, with the isotherms adhering to Langmuir isotherm model. The electrostatic attraction and cation exchange between CIP and the four carbons were the dominant adsorption mechanisms. Moreover, the thermodynamic parameters represented that the adsorption process had been confirmed to be a spontaneous and endothermic reaction.
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China.
authors.forename: Man
authors.initials: M
authors.lastname: Wang
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China. Electronic address: huanglihui409@126.com.
authors.forename: Lihui
authors.initials: L
authors.lastname: Huang
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Xue
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Bao
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, Shandong 250100, China.
authors.forename: Ji
authors.initials: J
authors.lastname: Huang
mesh_terms: D000327:Adsorption; D001557:Benzenesulfonates; D002244:Carbon / Q000737:chemistry; D002606:Charcoal / Q000138:chemical synthesis* / Q000737:chemistry; D000460:Chlorophyta / Q000737:chemistry*; D002939:Ciprofloxacin / Q000737:chemistry*; D007474:Ion Exchange; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D013816:Thermodynamics; D018505:Waste Management / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001557:Benzenesulfonates; D010756:Phosphoric Acids; D012996:Solutions; D014874:Water Pollutants, Chemical; D002606:Charcoal; D002939:Ciprofloxacin; C032365:benzenesulfonic acid; D002244:Carbon
keywords: Activated carbons; Enteromorpha prolifera; Regeneration; Sodium benzenesulfonate