International Journal of Environmental & Analytical Chemistry · 2021 · 19 citations · 58 references
Natural SciencesChemical EngineeringMaterials ScienceInorganic ChemistrySurface ScienceWater TreatmentAquatic ChemistryIron OxidesMineral ChemistryMineral Surface ChemistryMineral ThermodynamicsNanocompositesAdsorption At Mineral SurfacesAdsorption-based RemediationCoprecipitationCoprecipitation SynthesisMineral Surface AdsorptionMineral-surface InteractionsPh Effects On Metal RemovalPseudo-second-order Kinetics
α-Fe2O3 coated hydroxy magnesium silicate (HMS) was prepared by the coprecipitation method and was used for the sorption of Cr(VI) from the aquatic environment. FT-IR, XRD, and SEM characterised the investigated composite. The influence of pH, shaking time, Cr(VI) concentration, and the temperature was investigated. The results obtained are fitted well with the pseudo-second-order kinetic model. Besides, Freundlich isotherm is adequate than the Langmuir isotherm. The adsorption was observed to be exothermic, spontaneous, and accompanied by increasing the system’s randomness. The adsorption of chromium attained equilibrium after 60.0 min. The maximum adsorption capacities of α-Fe2O3/HMS composite for Cr(VI) were 10.75 mg/g obtained at a pH of 2.
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Berrin Tansel, John C. Sager, Tony Rector et al. · Separation and Purification Technology · 2006 · 655 citations
Engineering, Chemical Engineering, Environmental Engineering +17