title: Studies on the adsorption of amoxicillin on multi-wall carbon nanotubes.
abstract: This study examined the feasibility of removing amoxicillin (AMO) from aqueous solutions using multi-wall carbon nanotubes. The equilibrium adsorption data were analyzed using four widely applied isotherms: Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich. The results showed that the Langmuir isotherm model fits well the obtained experimental data. The adsorption process followed the pseudo-second-order model. The activation energy was found to be 19 kJ/mol. The Standard free energy changes, ΔG0, values were negative; the standard enthalpy change (ΔH0), and standard entropy change (ΔS0) values of the process were 4 kJ/mol and 36 J/mol.K. Results suggested that the AMO adsorption on carbon nanotubes was a spontaneous process.
authors.affiliation: Department of Environmental Health, Health Promotion Research Center, School of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran.
authors.forename: Davoud
authors.initials: D
authors.lastname: Balarak
authors.affiliation: Department of Environmental Health, Health Promotion Research Center, School of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran.
authors.forename: FerdosKord
authors.initials: F
authors.lastname: Mostafapour
authors.affiliation: Department of Environmental Health, Health Promotion Research Center, School of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran.
authors.forename: Edris
authors.initials: E
authors.lastname: Bazrafshan
authors.affiliation: Department of Chemistry, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia E-mail: tawfikas@hotmail.com.
authors.forename: Tawfik A
authors.initials: TA
authors.lastname: Saleh
mesh_terms: D000327:Adsorption; D000658:Amoxicillin / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D037742:Nanotubes, Carbon; D014874:Water Pollutants, Chemical; D000658:Amoxicillin