Yıl 2015, Cilt: 10 Sayı : 1 Sayfalar 37 - 45 2015-03-31
Evaluation of Lead Removal Using Prrenjas Montmorillonite Clay
Evaluation of Lead Removal Using Prrenjas Montmorillonite Clay
E Tako,A Mele,V Plaku (Hoxha),K Taraj
20 261

Heavy metal ions such as cadmium, zinc, copper, lead and nickel are hazardous to both human life and the environment. In the present work study on the feasibility of the Prrenjasmontmorrillonite clay for the removal of Pb2+ in aqueous medium through the process of adsorption under a set of variables (concentration of metal ion, amount of clay, pH, time and temperature of interaction)was carried out. Increasing pH favors the removal of Pb2+ till they are precipitated as the insoluble hydroxides. The uptake is rapid with maximum adsorption being observed within 90 min for Pb2+. The Lagergen pseudo first-order andsecond-order kinetics model, are utilized to evaluate the kinetics and the mechanism of the immobilization interactions. It is determined that adsorption of Pb2+ is well-fitted by the second order reaction kinetic. Langmuir and Freundlich isotherms are applied in order to determine the efficiency of natural clay used as an adsorbent. Results show that all isotherms are linear. The Langmuir model fitted better with the experimental data rather than the Freundulich model.Prrenjasmontmorillonite have considerable Langmuir monolayer capacity for Pb2+ 18.87mg/g. The thermodynamics of the immobilization process indicates to be endothermic. The interaction with Pb2+is accompanied by an increase in entropy and an appreciable decrease in Gibbs energy. The results have established good potentiality for Prrenjasmontmorillonite to remove Pb2+from aqueous medium through adsorption-mediated immobilization

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Yayımlanma Tarihi 31 Mart 2015
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Yayımlanma Tarihi : 31 Mart 2015


Makalenin Yazarları
E Tako
A Mele
V Plaku (Hoxha)
K Taraj