Fabrication of mixed phase calcium ferrite and zirconia nanocomposite for abatement of methyl orange dye from aqua matrix: Optimization of process parameters

Abstract

In this study, mixed phase of CaFe 2 O 4 and ZrO 2 magnetic nanocomposite (CaF-ZO-MNC) was fabricated through facile co-precipitation method and was explored for abatement of methyl orange (MO) dye from aqua matrix. X-ray diffraction (XRD) pattern of the synthesized CaF-ZO-MNC depicted significant diffraction peaks of ZrO 2 and CaFe 2 O 4 nanoparticles ensured the crystalline nature of the material. The coexistence of ZrO 2 and CaFe 2 O 4 nanoparticles in the composite increased the BET surface area (95.32m 2 /g) and improves its physicochemical properties as an adsorbent. Enhanced adsorption capacity towards MO dye was found to be 370.37 mg/g from Langmuir model, which is higher than standalone nanoscale Fe, Ca, and Zr metal oxide nanoparticles. The equilibrium adsorption data were found to follow Langmuir isotherm and the adsorption process followed second order kinetic model strictly. Response surface methodology (RSM) was utilized for optimizing the experimental conditions for maximizing the MO dye removal (%) with desirability function approach. Four factors five levels central composite design was implemented for RSM study and the simultaneous interaction of process variables on dye removal efficiency was studied by 3D response surface plots. Maximum MO dye removal of 98.92% was determined with MO dye concentration of 22 mg/L, adsorbent dose of 0.54 g/L, contact time of 25 min at recation temperature of 30°C.KEYWORDS adsorption capacity, kinetic and isotherm study, metal oxide nanocomposite, optimization, toxic dye

Synthesis of sewage sludge‐based carbon/TiO2/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater

“…To investigate the simultaneous effect of parameters on the response and optimization of parameters, the response surface methodology (RSM) is a useful statistical technique by reducing the number of experiments (Aliabadi, Irani, Ismaeili, & Najafzadeh, ; Karri, Tanzifi, et al, ; Tripathy, Ramesh, Debnath, & Kumar, ). Among RSM approaches, the central composite design (CCD) (Zare‐Dorabei, Ferdowsi, Barzin, & Tadjarodi, ; Zolgharnein, Shahmoradi, & Ghasemi, ) and Box–Behnken design (BBD) (Bhowmik, Deb, Debnath, & Saha, ; Bhowmik, Debnath, & Saha, ; Deb, Kanmani, Debnath, Bhowmik, & Saha, ; Ebrahimzadeh, Behbahani, Yamini, Adlnasab, & Asgharinezhad, ) have been extensively used for optimization of adsorption process. Among these methods, CCD has better prediction compared with BBD method (Zolgharnein et al, ).…”

Non‐competitive and competitive adsorption of Zn(II), Cu(II), and Cd(II) by a granular Fe‐Mn binary oxide in aqueous solution

“…The amounts of Zn(II), Cu(II), and Cd(II) adsorbed were found to increase as the temperature increasing from 298 to 318 K, and Cu(II) remained the most highly adsorbed metal ion at each different temperature. The Gibbs free energy (Δ G °), entropy change (Δ S °), and enthalpy change (Δ H °) for each adsorption were calculated using the equations 30 : …”

“…About 0.4 g GFMO was respectively added to 40 ml of 40 mg/L Zn(II), Cu(II), or Cd(II) solutions at pH 6.0. The centrifuge tubes were then agitated in an orbital shaker at 150 rpm and at 298 K. The samples removed at predetermined times (5,10,20,30,60,120,240, 480, 600, 960, and 1440 min) were passed through 0.45 μm polycarbonate membranes. And the concentration of residual metal ions was determined using an atomic absorption spectrophotometer (Z-2010, Hitachi, Japan).…”

“…13 In a typical synthesis, FeSO 4 Á7H 2 O and KMnO 4 were coprecipitated by the addition of a 5% PVA (wt/vol) solution (pH 8.0) with mechanical stirring for 1 h. The resulting brown solid was separated and shaped into spheres that were dried to obtain the GFMO. (5,10,20,30,60,120,240, 480, 600, 960, and 1440 min) were passed through 0.45 μm polycarbonate membranes. And the concentration of residual metal ions was determined using an atomic absorption spectrophotometer (Z-2010, Hitachi, Japan).…”

UV sensitive ZnO and TiO2‐ZnO nanocrystalline transparent glass‐ceramic materials for photocatalytic decontamination of surface water and textile industry wastewater

“…Treatment processes of contaminated water include, but not limited to, chemical precipitation, membrane filtration, adsorption ion exchange, and photocatalysis. [3][4][5][6][7][8][9][10][11] Hertrogenoes photocatlysis technology had a special attention as a promising technology for Mahmoud S. Abdel-Wahed and Ahmed Abdel-Karim authors contributed equally to this work.…”