Effect of structural differences of pumice on synthesis of pumice-supported nFe(0): removal of Cr (VI) from water
Yükleniyor...
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Heidelberg
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, pumice from diferent regions of Turkey (Diyarbakir, Southeast Turkey and Bitlis, East Turkey) has been supplied and used as supporting material for nanoscale zero-valent iron (nFe0
). Native Bitlis pumice (NBP)-supported nanoscale
zero-valent iron (BP-nFe0
) and native Diyarbakir pumice (NDP)-supported nanoscale zero-value iron (DP-nFe0
) were synthesized under the same conditions. Native pumice (NDP, NBP) and pumice-supported nFe0
(DP-nFe0
and BP-nFe0
) adsorbents
were morphologically and structurally characterized by SEM, EDX, XRF and BET. When using NBP as support material,
the iron content of the BP-nFe0
increased 1.9-fold from 1.99 to 3.83%. However, iron content of NDP (2.08%) increased
approximately 29 times after it is used as a support material in synthesis of DP-nFe0
(60%). The removal potential of native
pumice (NBP and NDP) and iron-modifed pumice (BP-nFe0
and DP-nFe0
) samples was investigated to remove Cr(VI) ions.
The parameters of solution pH, initial metal concentration, contact time and the amount of adsorbent in the removal of chromium (VI) ions were investigated. Langmuir, Freundlich, Temkin, Dubinin–Radushkevich and Jovanovic isotherm models
were used to evaluate the adsorption equilibrium data. The equilibrium adsorption was found so as to be well described by
the Langmuir isotherm model for all the adsorbents studied. The maximum adsorption capacity of Cr(VI) ions for NDP, NBP,
DP-nFe0
and BP-nFe0
was 10.82, 14.30, 161.29 and 17.39 mg/g, respectively. The rate of Cr(VI) removal was subjected to
kinetic analysis using pseudo-frst-order, pseudo-second-order, intraparticle difusion and Elovich models. Kinetic studies
suggest that adsorption of NDP, NBP, DP-nFe0
and BP-nFe0
described more favorably by the pseudo-second-order kinetic
model. The results showed that NDP is a much better support material for nFe0
when compared to NBP
Açıklama
WOS:000691430200002
Anahtar Kelimeler
Pumice, Hexavalent chromium, Nano-zero-valent iron, Adsorption, Comparison
Kaynak
Applied Water Science
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
11
Sayı
7
Künye
Tural, B., Ertaş, E., Güzel, M. ve Tural, S. (2021) Effect of structural differences of pumice on synthesis of pumice-supported nFe(0): removal of Cr (VI) from water. Applied Water Science, 11(7), 1-11.
