Waste fly ashes and their chemical modifications as cheap and effective adsorbents

• Autorzy: Sarbak Z. , Kramer-Wachowiak M.
• Języki publikacji: EN

Abstrakty

EN

Fly ashes from the Power Plants were modified with the NaOH, HCl, EDTA solutions. On the basis of the X-ray diffraction, infrared spectroscopy, thermal analysis (DTA), and thermogravimetry (TG), it was found that the chemically modified fly ashes showed new crystalline structures. A study by scanning with the electron microscopy (SEM) allowed a detailed determination of the shape of the isles and agglomerates. The chemical treatment of the initial fly ashes resulted in a transformation of the bal-shaped agglomerations into different products characterised by a specific size and shape of the particles. The large surface area of the samples was confirmed by the tests with an adsorption of methylene blue (MB). The obtained samples were examined in the adsorptive removal of n-butylamine as a model air odorising compound. The adsorption abilities of the modified and unmodified fly ashes have been also tested in the removal of heavy metal ions such as zinc, cadmium, lead, chromium and nickel. Ions of these metals are often present in the industrial sewage. Fly ashes, modified with the NaOH solution showed the highest adsorption properties.

Słowa kluczowe

EN

fly ash; modification; adsorption; structures; pore size

PL

popiół lotny; modyfikacja; adsorpcja; struktura

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2004
• Tom: Vol. 6, nr 4
• Strony: 51--59
• Opis fizyczny: Bibliogr. 8 poz., tab., rys.

Twórcy

autor

Sarbak Z.

• Adam Mickiewicz University, Faculty of Chemistry, 60-780 Poznań

autor

Kramer-Wachowiak M.

• Adam Mickiewicz University, Faculty of Chemistry, 60-780 Poznań

Bibliografia

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