The use of fly ash as a low cost, environmentally friendly alternative to activated carbon for the removal of heavy metals from aqueous solutions
Küçük Resim Yok
Tarih
2007
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ELSEVIER SCIENCE BV
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The objective of this study was to compare fly ash and activated carbon for their ability to remove nickel [Ni(II)] and zinc [Zn(II)] from an aqueous solution. The effects of contact time, pH, initial metal concentration and amount of adsorbent on the adsorption process at 20 +/- 2 degrees C were studied. Batch kinetic studies showed that an equilibrium time of 1 h was required for the adsorption of Ni(II) and Zn(II) on both adsorbents. The maximum metal removal was found to be dependent on solution pH (4.0 for Ni(II) and Zn(II)). With an increase in the concentrations of these metals, the adsorption of Ni(II) and Zn(II) decreased on both of the adsorbents. The effectiveness of fly ash as an adsorbent improved with increasing calcium (CaO) content. Adsorption data in the range of pH values (3.0-8.0) using Ni(II) concentration of 25 +/- 2 mg/L and Zn(II) concentration of 30 +/- 2 mg/L in solution were correlated using the linear forms of the Langmuir and Freundlich equations. The fly ash was found to be a metal adsorbent as effective as activated carbon. (c) 2006 Elsevier B.V. All rights reserved.
Açıklama
17th European Chemistry at Interfaces Conference (ECIC-17) -- JUN 27-JUL 01, 2005 -- Loughborough Univ, Dept Chem Engn, Loughborough, ENGLAND
Anahtar Kelimeler
fly ash, activated carbon, adsorption
Kaynak
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
298
Sayı
01.02.2020
