Nitrate Removal by Sorbent Derived from Waste Lignocellulosic Biomass of Lagenaria vulgaris

What is it about?

The equilibrium, kinetics and thermodynamic parameters of nitrate sorption using a cationic modified Lagenaria vulgaris shell as a sorbent were studied . The sorbent was obtained by chemical modification of waste lignocellulosic biomass.

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Why is it important?

The obtained results of nitrate sorption from synthetic solutions of different concentrations (2–100 mg/L) were examined by non-linear regression analysis of different reaction kinetic and multi-linear diffusion models. To describe the sorption equilibrium in the liquid–solid system, the experimentally obtained data were fitted with typical non-linear models of sorption isotherms (Langmuir, Freundlich, Temkin, Dubinin-Radushkevich and Sips isotherms). To determine the thermodynamic parameters (ΔG, ΔH and ΔS), nitrate sorption experiments on CMLVS sorbent were performed at different temperatures (20, 40, 60 °C), under previously determined optimal conditions. Nitrates desorption and CMLVS sorbent regeneration was also studied.

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