KINETIC-THERMODYNAMIC PARAMETERS OF Pb (II) ION ADSORPTION THROUGH A SYNTHETIC ZEOLITHIC SOLID

Abstract

Introduction:
The solid material obtained from a basic hydrothermal attack on natural zeolite makes it possible to obtain an adsorbent for the Pb2+ ion (ac).
Objective:
To determine the kinetic-thermodynamic parameters that governs the adsorption of lead (II) ions in an artificial zeolite.
Materials and Methods:
Lead (II) solutions concentrations are determined by Atomic Absorption Spectroscopy. They are used for kinetic and diffusive studies at temperatures of 298 K and 323 K.
Results and Discussion:
The process activation energy is 15.70 kJ/mol. The diffusion coefficients are low. Given the values of free energy, entropy and enthalpy, the process occurs at any temperature.
Conclusions:
The kinetic mechanisms respond to pseudo-first-order adsorption and diffusion prevails in the liquid film.