title: Application of response surface methodology to optimize the adsorption performance of a magnetic graphene oxide nanocomposite adsorbent for removal of methadone from the environment.
abstract: Magnetic graphene oxide (MGO) nanocomposites have been synthesized by the co-precipitation route. The surface structure of MGO nanocomposites were analyzed by XRD, TEM, SEM, VSM and nitrogen adsorption-desorption instrumental technique. Response surface methodology was used to optimize the removal of methadone by MGO nanocomposites in aqueous solution. Experiments were conducted based on Box-Behnken design (BBD). The influence of three parameters on the removal of methadone was examined using the response surface methodological approach. The significance of independent variables and their interactions were tested by analysis of variance (ANOVA). The optimum pH, adsorbent dose and temperature were found to be 6.2, 0.0098g and 295.7K, respectively. Under these conditions, removal efficiency of methadone was found to be 87.20mg/g.
authors.affiliation: Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa. Electronic address: vinodfcy@gmail.com.
authors.forename: Vinod
authors.initials: V
authors.lastname: Kumar Gupta
authors.affiliation: Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa.
authors.forename: Shilpi
authors.initials: S
authors.lastname: Agarwal
authors.affiliation: Chemical Engineering Department, King Saud University Riyadh, Saudi Arabia.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Asif
authors.affiliation: Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University, Tehran, Iran. Electronic address: ali.fakhri88@yahoo.com.
authors.forename: Ali
authors.initials: A
authors.lastname: Fakhri
authors.affiliation: Department of Environmental Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Nima
authors.initials: N
authors.lastname: Sadeghi
keywords: Box-Behnken design; Graphene oxide; Methadone; Optimization; Response surface methodology