title: Sono-assisted adsorption of a textile dye on milk vetch-derived charcoal supported by silica nanopowder.
abstract: This study was performed to assess the efficiency of silica nanopowder (SNP)/milk vetch-derived charcoal (MVDC) nanocomposite coupled with the ultrasonic irradiation named sono-adsorption process for treating water-contained Basic Red 46 (BR46) dye. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and Fourier transform infrared spectroscopy (FT-IR) were performed for the characterization of as-prepared adsorbent. The sono-assisted adsorption process was optimized using response surface optimization on the basis of central composite design by the application of quadratic model. Accordingly, the color removal can be retained more than 93% by an initial BR46 concentration of 8 mg/L, sonication time of 31 min, adsorbent dosage of 1.2 g/L and initial pH of 9. The pseudo-second order kinetic model described the sono-assisted adsorption of BR46 reasonably well (R2> 0.99). The intra-particular diffusion kinetic model pointed out that the sono-assisted adsorption of BR46 onto SNP/MVDC nanocomposite was diffusion controlled as well as that ultrasonication enhanced the diffusion rate.
authors.affiliation: Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Sahand
authors.initials: S
authors.lastname: Jorfi
authors.affiliation: Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran. Electronic address: darvishi@arakmu.ac.ir.
authors.forename: Reza
authors.initials: R
authors.lastname: Darvishi Cheshmeh Soltani
authors.affiliation: Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Ahmadi
authors.affiliation: Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Khataee
authors.affiliation: Department of Environmental Health Engineering, School of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran; Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Safari
mesh_terms: D000327:Adsorption; D027883:Astragalus Plant / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry / Q000302:isolation & purification*; D002606:Charcoal / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification*; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D053761:Nanocomposites / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013783:Textile Industry; D014465:Ultrasonics / Q000379:methods; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D002606:Charcoal; C050846:basic red 46; D012822:Silicon Dioxide
keywords: Adsorption; Charcoal; Experimental design; Nanostructured silica; Ultrasound