Physical and Chemical Factors Affecting the Adsorption of Cr(VI) via Humic Acids Extracted From Brown Coals
Yükleniyor...
Dosyalar
Tarih
2010
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The aim of this study is to demonstrate the potential of humic acids (HAs) as a low-cost reactive barrier material for environmental protection applications of toxic Cr(VI). Sorption of Cr(VI) on the HAs obtained from Ilgin, Beysehir and Ermenek lignites in Turkey were investigated and their sorption properties were compared with the activated carbon (AC) from Merck. The adsorption was carried out using a batch method. The sorption of Cr(VI) on the surface of HAs depends strongly on the pH and Cr(VI) sorption increased with a decreasing pH and increase in the concentration of this metal. The Freundlich adsorption isotherm was used to describe observed sorption phenomena. It was observed that the maximum adsorption capacity of 0.55 mmol Cr(VI)/g for Ilgin, 0.64 mmol Cr(VI)/g for Beysehir and 0.40 mmol Cr(VI)/g for Ermenek was achieved at pH of 3.2. The rise in temperature caused a slight decrease in the value of the equilibrium constant (K(c)) for the sorption of Cr(VI). The Cr(VI) sorption capacities of Beysehir and Ilgin HAs were nearly as same as that of AC (0.58 mmol Cr(VI)/g). Therefore, HAs are used for the adsorption of Cr(VI) in wastewater treatment applications.
Açıklama
Anahtar Kelimeler
Sorption, Chromium, Activated carbon, Humic acid
Kaynak
Desalination
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
255
Sayı
Künye
Arslan, G., Edebali, S., Pehlivan, E., (2010). Physical and Chemical Factors Affecting the Adsorption of Cr(VI) via Humic Acids Extracted From Brown Coals. Desalination, (255), 117-123. Doi: 10.1016/j.desal.2010.01.006
