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- W2021639103 abstract "Adsorption of basic fuchsin (BF) and crystal violet (CV) dyes onto iron-manganese oxide coated kaolinite (IMK) was investigated. The adsorbent was characterized using FT-IR, XRD spectra, EDX and SEM images. The effect of various parameters such as initial dye concentration, contact time, adsorbent dose and initial solution pH was examined. The data were fitted into non-linear two-parameter Langmuir, Freundlich, Dubinin–Radushkevich (D–R) and three-parameter Toth isotherm models. The data best fitted the Langmuir and Toth models. Langmuir saturation adsorption capacity (Qo) at 308 K for BF and CV was found to be 10.36 mg/g and 20.64 mg/g, respectively. The value of apparent energy of adsorption obtained from non-linear D–R model (1.10–2.38 kJ/mol) suggested physical adsorption of the dyes. The adsorption process followed pseudo-second order kinetics. The negative value of free energy change (2.27–6.125 kJ/mol) and positive value of enthalpy change (6.70–6.68 kJ/mol) indicated the feasibility, spontaneity and endothermic nature of the adsorption process. The positive value of entropy change (0.028 kJ/mol K) revealed increased randomness at the adsorbent–adsorbate interface. The results showed that iron-manganese oxide coated kaolinite is a promising low cost adsorbent for the removal of BF and CV dyes from wastewater." @default.
- W2021639103 created "2016-06-24" @default.
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- W2021639103 date "2015-04-01" @default.
- W2021639103 modified "2023-10-02" @default.
- W2021639103 title "Removal of basic dyes from aqueous solution by adsorption onto binary iron-manganese oxide coated kaolinite: Non-linear isotherm and kinetics modeling" @default.
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- W2021639103 doi "https://doi.org/10.1016/j.clay.2015.01.005" @default.
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