title: Ultrasonic enhancement of the simultaneous removal of quaternary toxic organic dyes by CuO nanoparticles loaded on activated carbon: Central composite design, kinetic and isotherm study.
abstract: Copper oxide nanoparticles loaded on activated carbon (CuO-NPs-AC) were prepared and fully analyzed and characterized with FE-SEM, XRD and FT-IR. Subsequently, this novel material was used for simultaneous ultrasound-assisted adsorption of brilliant green (BG), auramine O (AO), methylene blue (MB) and eosin yellow (EY) dyes. Problems regard to dyes spectra overlap in quaternary solution of this dyes were omitted by derivative spectrophotometric method. The best pH in quaternary system was studied by using one at a time method to achieved maximum dyes removal percentage. Subsequently, sonication time, adsorbent dosage and initial dyes concentrations influence on dyes removal was optimized by central composite design (CCD) combined with desirability function approach (DFA). Desirability score of 0.978 show optimum conditions set at sonication time (4.2 min), adsorbent mass (0.029 g), initial dyes concentration (4.5 mg L(-1)). Under this optimum condition the removal percentage for MB, AO, EY and BG dyes 97.58, 94.66, 96.22 and 94.93, respectively. The adsorption rate well fitted by pseudo second-order while adsorption capacity according to the Langmuir model as best equilibrium isotherm model for BG, MB, AO and EY was 20.48, 21.26, 22.34 and 21.29 mg g(-1), respectively.
authors.affiliation: Chemistry Department, Yasouj University, Yasouj 75914-35, Iran.
authors.forename: Somayeh
authors.initials: S
authors.lastname: Dashamiri
authors.affiliation: Chemistry Department, Yasouj University, Yasouj 75914-35, Iran. Electronic address: m_ghaedi@mail.yu.ac.ir.
authors.forename: Mehrorang
authors.initials: M
authors.lastname: Ghaedi
authors.affiliation: Chemistry Department, Yasouj University, Yasouj 75914-35, Iran.
authors.forename: Kheibar
authors.initials: K
authors.lastname: Dashtian
authors.affiliation: Process Intensification Library Chemical Engineering Department, Yasouj University, Yasouj 759418-74831, Iran.
authors.forename: Mahmood Reza
authors.initials: MR
authors.lastname: Rahimi
authors.affiliation: Department of Polymer Engineering, Golestan University, Gorgan 49188-88369, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Goudarzi
authors.affiliation: Pathology Group, Yasuj Medical School, Yasuj, Iran.
authors.forename: Ramin
authors.initials: R
authors.lastname: Jannesar
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D004396:Coloring Agents / Q000302:isolation & purification*; D003300:Copper / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry*; D013816:Thermodynamics; D014465:Ultrasonics
chemical_list: D004396:Coloring Agents; D002244:Carbon; D003300:Copper; C000520:cuprous oxide
keywords: Auramine-O; Brilliant green; Central composite design; Copper oxide nanoparticle; Eosin yellow; Methylene blue; Ultrasound-assisted adsorption