Removal of Pb(II) and Cd(II) ions from aqueous solutions with selected organic wastes

• Autorzy: Bozecka A. , Bozecki P. , Sanak-Rydlewska S.

Identyfikatory

DOI

10.5277/ppmp160132

• Języki publikacji: EN

Abstrakty

EN

The authors investigated sorption of Pb(II) and Cd(II) ions from aqueous solutions on selected natural wastes: sunflower hulls, walnut shells and plum stones. The chemical and physical structure of the surface of these sorbents was determined using infrared spectrometry and scanning electron microscopy. The most favourable physicochemical parameters of the sorption processes were also defined. The sorption of Pb(II) and Cd(II) ions was described according to the Langmuir and Freundlich models. It has been shown that the adsorbents studied can be effectively used in removing heavy metals from aqueous solutions. The sunflower hulls have the highest sorption capacity for Pb(II) and Cd(II) ions. It is equal to 36.93 mg/g for the Pb(II) ions and 19.93 mg/g Cd(II) ions. The calculated values of thermodynamic functions indicate a spontaneous (ΔGº< 0) and exothermic (ΔHº< 0) nature of the sorption processes. A participation of ion exchange in these processes is significant. Desorption tests confirm that the adsorbed heavy metals can be recovered and the sorbent materials after regeneration can be reused.

Słowa kluczowe

EN

biosorption; Pb(II); Cd(II); organic wastes; adsorption isotherms

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 1
• Strony: 380--396
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Bozecka A.

• AGH University of Science and Technology, Faculty of Mining and Geoengineering, Al. Mickiewicza 30, 30-059 Cracow, Poland

autor

Bozecki P.

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Al. Mickiewicza 30, 30-059 Cracow, Poland

autor

Sanak-Rydlewska S.

• AGH University of Science and Technology, Faculty of Mining and Geoengineering, Al. Mickiewicza 30, 30-059 Cracow, Poland

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.