In a batch mode, the adsorption of an acidic dye, Methyl Orange (MO), onto non-viable blue green algal biomass, Oscillatoria sp., was studied in aqueous solutions with respect to operational parameters such as contact duration, adsorbent dose, pH, and temperature. Fourier transform infrared (FTIR) spectroscopy, elemental analysis, and scanning electron microscopy were used to characterise the algal biomass (SEM). Langmuir and Freundlich adsorption models were used to examine equilibrium isotherms, and the Langmuir isotherm was determined to be the best fit, with a maximum adsorption capacity of 98.03 mg/g. To characterise the kinetic data, the pseudo-first order, pseudo-second order, and intraparticle diffusion models were used to analyse the rate constants at various concentrations. The pseudo-second order rate equation was discovered to govern adsorption kinetics. Thermodynamic factors such as enthalpy, entropy, and Gibbs free energy demonstrated that adsorption is endothermic, unpredictable, and spontaneous at high temperatures. The findings suggested that Oscillatoria sp. could be used as an adsorbent material for removing MO dye from effluents.
Author (S) Details
Surabhi Sagar
Chemistry Department, K.L.D.A.V. (P.G) College, Roorkee, 247 667, India.
Arshi Rastogi
Chemistry Department, K.L.D.A.V. (P.G) College, Roorkee, 247 667, India.
View Book :- https://stm.bookpi.org/NICB-V4/article/view/4322
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