In this work, nanomuscovite adsorbents were prepared via intercalation with different organic intercalates (DTAB- TTAB- DTPA- PA- PN). The prepared nanoadsorbents were used to evaluate the removal of Cd2+ and Pb2+ from polluted water. Best nanomuscovite was prepared by Muscovite with DTPA. The selected nanomuscovite was characterized by XRD, TEM, EDX, FTIR and BET surface area. The maximum Cd2+ and Pb2+ removal efficiency of the prepared nanomuscovite ( 91.5% Cd and 97% Pb ) was observed at intial metal concentration 50 ppm, pH 6 for Pb2+ and pH 7 for Cd2+, adsorbent dosage 0.2 g, contact time 60 min, and solution temperature 25oC. Isotherm models (Freundlich, Langmuir, Dubunin–Radushkevich and Temkin isotherm models) were applied for the adsorption of Cd2+ and Pb2+ on nanomuscovite adsorbent. The Langmuir isotherm model was well-fit by the adsorption of Cd2+ and Pb2+ on nanomuscovite. The kinetics of adsorption were validated using the pseudo-first order, pseudo-second order, Elovich, and intra-particle diffusion models.. Adsorption of Cd2+ and Pb2+ on nanomuscovite follows a pseudo-second order kinetic model in all four of the kinetic models. Thermodynamics parameters of Cd and Pb adsorption indicated exothermic and spontaneous processes for Cd2+ and Pb2+. The obtained results were applied to the real wastewater which indicated high Cd and Pb removal.
In this study, nanomuscovite adsorbents were prepared by intercalation with various organic intercalates (DTAB-TTAB-DTPA-PA-PN) and used to remove Cd2+ and Pb2+ from polluted water. The best nanomuscovite was prepared using DTPA and muscovite (Muc/DTPA) and characterized by XRD, TEM, EDX, FTIR, and BET surface area. The developed nanoadsorbent was used to remove Cd2+ and Pb2+ from polluted water. The effect of various factors, including contact time, adsorbent dosage, solution pH, and temperature, was investigated. The results reveal that the maximum adsorption of Cd2+ and Pb2+ was 91.5% and 97%, respectively, at the initial metal concentration 50 ppm, adsorbent dosage 0.2 g, contact time 60 min, solution temperature 25 °C, and pH 6 for Pb2+ and pH 7 for Cd2+. Adsorption isotherm models (Freundlich, Langmuir, Dubunin–Radushkevich, and Temkin isotherm models) as well as kinetic models (pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion models) were employed to evaluate the experimental results. The adsorption of Cd2+ and Pb2+ on Muc/DTPA fitted well within the Langmuir isotherm model and followed pseudo-second-order kinetics. Thermodynamics parameters of metal adsorption indicated exothermic and spontaneous processes. Results were applied to the real wastewater that showed high Cd2+ and Pb2+ removal.
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