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UTILIZATION OF TUNISIAN BENTONITE AS ION-EXCHANGE AND SORBENT MATERIAL IN THE REMOVAL OF LEAD FROM AQUEOUS SOLUTIONS

Yasser Hannachi ; Faculty of Sciences of Monastir, Tunisia

Puni tekst: engleski, pdf (753 KB) str. 123-140 preuzimanja: 191* citiraj
APA 6th Edition
Hannachi, Y. (2013). UTILIZATION OF TUNISIAN BENTONITE AS ION-EXCHANGE AND SORBENT MATERIAL IN THE REMOVAL OF LEAD FROM AQUEOUS SOLUTIONS. The holistic approach to environment, 3 (3), 123-140. Preuzeto s https://hrcak.srce.hr/109084
MLA 8th Edition
Hannachi, Yasser. "UTILIZATION OF TUNISIAN BENTONITE AS ION-EXCHANGE AND SORBENT MATERIAL IN THE REMOVAL OF LEAD FROM AQUEOUS SOLUTIONS." The holistic approach to environment, vol. 3, br. 3, 2013, str. 123-140. https://hrcak.srce.hr/109084. Citirano 19.01.2020.
Chicago 17th Edition
Hannachi, Yasser. "UTILIZATION OF TUNISIAN BENTONITE AS ION-EXCHANGE AND SORBENT MATERIAL IN THE REMOVAL OF LEAD FROM AQUEOUS SOLUTIONS." The holistic approach to environment 3, br. 3 (2013): 123-140. https://hrcak.srce.hr/109084
Harvard
Hannachi, Y. (2013). 'UTILIZATION OF TUNISIAN BENTONITE AS ION-EXCHANGE AND SORBENT MATERIAL IN THE REMOVAL OF LEAD FROM AQUEOUS SOLUTIONS', The holistic approach to environment, 3(3), str. 123-140. Preuzeto s: https://hrcak.srce.hr/109084 (Datum pristupa: 19.01.2020.)
Vancouver
Hannachi Y. UTILIZATION OF TUNISIAN BENTONITE AS ION-EXCHANGE AND SORBENT MATERIAL IN THE REMOVAL OF LEAD FROM AQUEOUS SOLUTIONS. The holistic approach to environment [Internet]. 2013 [pristupljeno 19.01.2020.];3(3):123-140. Dostupno na: https://hrcak.srce.hr/109084
IEEE
Y. Hannachi, "UTILIZATION OF TUNISIAN BENTONITE AS ION-EXCHANGE AND SORBENT MATERIAL IN THE REMOVAL OF LEAD FROM AQUEOUS SOLUTIONS", The holistic approach to environment, vol.3, br. 3, str. 123-140, 2013. [Online]. Dostupno na: https://hrcak.srce.hr/109084. [Citirano: 19.01.2020.]

Sažetak
The adsorption characteristics of Pb(II) ions using the Tunisian bentonite were investigated. Experimental parameters affecting the adsorption process such as pH, contact time, adsorbent dosage and temperature were studied. Langmuir, Freundlich and Dubinin–Radushkevich (D–R) models were applied to describe the biosorption isotherms. The adsorption capacity of bentonite for Pb(II) ions was found to be 36.23 mg/g. From the D–R isotherm model, the mean free energy was calculated as 11. kJ/mol, indicating that the adsorption of Pb(II) ions was taken place by ion-exchange process. The calculated thermodynamic parameters showed that the adsorption of Pb(II) ions onto bentonite was feasible, spontaneous and exothermic in nature. Kinetics data were best described by pseudo-second- order model. Infrared (IR) spectra of the bentonite sample showed that the positions and shapes of the fundamental vibrations of the OH and Si–O groups were influenced by the adsorbed Pb(II) cations. The X-ray diffraction (XRD) spectra indicated that the Pb(II) adsorption onto the bentonite samples led to changes in unit cell dimensions and symmetry of the parent bentonite.

Ključne riječi
Bentonite; ion-exchange; Langmuir isotherm; pseudo-second- order model; mass transfer analysis; Thermodynamic; (IR) spectra; (XRD) spectra

Hrčak ID: 109084

URI
https://hrcak.srce.hr/109084

Posjeta: 333 *