title: Removal of methyl orange on modified ostrich bone waste--a novel organic-inorganic biocomposite.
abstract: The synthesis and growth behavior of the chemically modified ostrich bone wastes as bioadsorbents for the removal of methyl orange from aqueous solutions have been investigated. The ostrich bone wastes were treated with cetyltrimethylammonium bromide (CTABr) and sodium dodecyl benzene sulfonate (SDBS). The synthesized biomaterials were characterized by several physicochemical techniques. The modified ostrich bone with CTABr was found to be effective as adsorbent for the removal of methyl orange (MO) from aqueous solutions. The effect of the experimental conditions on the adsorption behavior was studied by varying the contact time, initial MO concentration, temperature, initial pH, chemical modification process, and amount of adsorbent. The contact time to attain equilibrium for maximum adsorption (90%) was found to be 50 min. The adsorption kinetics of MO has been studied in terms of pseudo-first- and -second-order kinetics, and the Freundlich, Langmuir and Langmuir-Freundlich isotherm models have also been applied to the equilibrium adsorption data. The adsorption process was spontaneous and endothermic in nature and followed pseudo-second-order kinetic model.
authors: Department of Chemistry, Shiraz Branch, Islamic Azad University, P.O. Box 71955-149, Shiraz, Fars, Iran. Electronic address: m-arshadi@ch.iut.ac.ir.
authors: M
authors: M
authors: Arshadi
authors: Young Researchers and Elite Club, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran.
authors: A R
authors: AR
authors: Faraji
authors: Department of Water Engineering, College of Agriculture, Fasa University, 74617-81189 Fasa, Iran.
authors: M J
authors: MJ
authors: Amiri
authors: Department of Chemistry, Faculty of Science, University of Zabol, Zabol, Iran.
authors: M
authors: M
authors: Mehravar
authors: Department of Applied Chemistry, Building Los Acebos, Public University of Navarra, Campus of Arrosadía, E-31006 Pamplona, Spain.
authors: A
authors: A
authors: Gil
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry* / Q000302:isolation & purification; D001557:Benzenesulfonates / Q000737:chemistry*; D001842:Bone and Bones / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents / Q000737:chemistry* / Q000302:isolation & purification; D007700:Kinetics; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013816:Thermodynamics
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D002593:Cetrimonium Compounds; D004396:Coloring Agents; D007202:Indicators and Reagents; D002606:Charcoal; C001114:dodecylbenzenesulfonic acid; C100258:methyl orange; D000077286:Cetrimonium
keywords: Adsorption; Methyl orange; Ostrich bone; Surfactant