Abstract
ZSM-5 `is a porous zeolite material that reveals good activity for the adsorption of heavy metals and other contaminants for effluent purification. In this scientific research, we synthesized the novel CaO-CdO/ZSM-5 zeolite nanocomposite adsorbent and studied the effects of different parameters on the adsorption of Pb2+ ions from water media for the first time. About 99.2% adsorption removal efficiency was obtained after a contact time of 60 min and an adsorbent amount of 0.1g/L for an initial Pb2+ concentration of 200mg/L at pH 8 and temperature of 60oC. The adsorption kinetic fit well via the pseudo-second-order model. Furthermore, the adsorption results were reproduced using the Langmuir isotherm with a maximum adsorption capacity of mg/g. The thermodynamic data displayed that the adsorption of Pb2+ ions over the CaO-CdO/ZSM-5 nanocomposite was endothermic and spontaneous.
Highlights
The present research was aimed to investigate the adsorption of Pb2+ ions from water media on the CaO-CdO/ ZSM-5 zeolite nanocomposite
The outcomes illustrated that 0.1g/L of CaO-CdO/ZSM-5, pH 8, initial Pb2+ concentration of 200mg/L, and contact time of 60 min were optimized for maximum adsorption of Pb2+ ions
The kinetic evaluation displayed that the adsorption of Pb2+ ions on the CaO-CdO/ ZSM-5 nanocomposite follows the pseudo-second-order model
Summary
The nanocomposite is a multiphase solid material where one of the phases has one, two, or three dimensions of less than 100 nanometers (nm) or structures having nano-scale repeat distances between the different phases that make up the material [1]. Some scientists are aware that with polymer nanocomposites, properties related to local chemistry, degree of thermoset cure, polymer chain mobility, polymer chain conformation, degree of polymer chain ordering, or crystallinity can all vary significantly and continuously from the interface with the reinforcement into the bulk of the matrix This massive quantity of reinforcement surface area means that a relatively small amount of nanoscale reinforcement can have an observable effect on the macro scale properties of the composite [8]. Combining the benefits of zeolite with our 30 years of experience in working with air purification gives our customers a supremely sustainable and customized system with low operating costs and high availability During drying it comes to the removal of free and bound water from the crystal grid, which is counterbalanced back in contact with materials such as stored grain and feed, pet litter, in the flue gas to prevent condensation and the like [13]. These compounds exhibit the greatest affinity to bind to clinoptilolite, which operates as a selective adsorbent for a wide range of pollutants [16]
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