title: Basic Dye Adsorption onto Clay/MnFe2O4Composite: A Mechanistic Study.
abstract: Native, HCl pretreated clay and MnFe2O4/clay composite were investigated as an adsorbent for crystal violet (CV) removal. The adsorption behavior of dye was studied in batch experiments as a function of contact time, adsorbent dose, pH, dye initial concentration and temperature. The medium pH 8, contact time 30 min, MnFe2O4/clay composite dose 0.05 mg/L, temperature 35 °C and 100 mg/L dye initial concentration furnished maximum CV adsorption. Adsorption data fitted well to the Langmuir isotherm model and maximum CV dye adsorption capacity of composite was 49.74 mg/g. The thermodynamic parameters revealed that the adsorption process of CV was exothermic and spontaneous in nature. CV adsorption followed the pseudo second order kinetic model. MnFe2O4/clay composite exhibited good CV adsorption capacity and can be used as an alternative adsorbent for the removal of basic dyes from effluents.
authors.forename: Adeela
authors.initials: A
authors.lastname: Kanwal
authors.forename: Haq Nawaz
authors.initials: HN
authors.lastname: Bhatti
authors.forename: Munawar
authors.initials: M
authors.lastname: Iqbal
authors.forename: Saima
authors.initials: S
authors.lastname: Noreen
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D005290:Ferric Compounds / Q000737:chemistry*; D005840:Gentian Violet / Q000302:isolation & purification*; D017895:Manganese Compounds / Q000737:chemistry*; D008956:Models, Chemical; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000538:Aluminum Silicates; D005290:Ferric Compounds; D017895:Manganese Compounds; D014874:Water Pollutants, Chemical; C551151:manganese ferrite; D005840:Gentian Violet; D000077215:Clay