title: Optimization of process parameters for removal of heavy metals by biomass of Cu and Co-doped alginate-coated chitosan nanoparticles.
abstract: In this study, the efficiency of alginate-coated chitosan nanoparticles (Alg-CS-NPs) for removal of heavy metals from industrial effluents was investigated. To this end, the researchers constructed a reactor containing biomass, using response surface methodology (RSM) for process optimization. Reactor tests were carried out with both synthetic and industrial effluents containing nickel. The optimum conditions to achieve maximum removal efficiency (RE) rates for both synthetic and industrial effluents were specified for contact time (0-120min), pH level (1-9), biomass dose (0.1-0.9g), and initial metal ion concentration (10-90mg/L). It was determined that 94.48% of the nickel could be removed at pH=3, 70mg/L initial nickel concentration, a dose of 0.3g biomass, and 30min contact time. The kinetic data fit well to a pseudo second-order model and the equilibrium data of the metal ions could be described well with Freundlich isotherm models.
authors.affiliation: Department of Chemical Engineering, North Tehran Branch, Islamic Azad University, PO Box 19585/936, Tehran, Iran. Electronic address: akbaresmaeili@yahoo.com.
authors.forename: Akbar
authors.initials: A
authors.lastname: Esmaeili
authors.affiliation: Department of Chemical Engineering, North Tehran Branch, Islamic Azad University, PO Box 19585/936, Tehran, Iran.
authors.forename: Najmeh
authors.initials: N
authors.lastname: Khoshnevisan
mesh_terms: D000464:Alginates / Q000737:chemistry*; D018533:Biomass; D019149:Bioreactors; D048271:Chitosan; D003035:Cobalt; D003300:Copper; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D007700:Kinetics; D019216:Metals, Heavy; D053758:Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000302:isolation & purification*; D044647:Sargassum; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D019216:Metals, Heavy; D003035:Cobalt; D003300:Copper; D009532:Nickel; D020723:Glucuronic Acid; D048271:Chitosan
keywords: Alginate; Chitosan nanoparticles; Cu and Co-doped; Heavy metals; Reactor design