One step preparation of ZnFe2O4/Zn5(OH)6(CO3)2 nanocomposite with improved As(V) removal capacity

Tresintsi, S.; Kokkinos, E.; Kamou, A.; Simeonidis, K.; Kyriakou, G.; Zouboulis, A.; Mitrakas, M.

doi:10.6084/m9.figshare.5705080.v1

lsst_a_1413390_sm5376.docx (385.96 kB)

One step preparation of ZnFe₂O₄/Zn₅(OH)₆(CO₃)₂ nanocomposite with improved As(V) removal capacity

journal contribution

posted on 2017-12-14, 20:24 authored by S. Tresintsi, E. Kokkinos, A. Kamou, K. Simeonidis, G. Kyriakou, A. Zouboulis, M. Mitrakas

Novel adsorbents consisting of ZnFe₂O₄/Zn₅(OH)₆(CO₃)₂ (hydrozincite) nanocomposite materials were studied for efficient As(V) removal from water. Nanocomposites were synthesized by the co-precipitation of Zn and Fe salts in alkaline conditions. Depending on the Zn/Fe molar ratio, a variety of materials was produced with different ZnFe₂O₄/Zn₅(OH)₆(CO₃)₂ contents. The adsorbent’s efficiency for As(V) removal was enhanced proportionally to the percentage of Zn₅(OH)₆(CO₃)₂ content. The nanocomposite with 74 ± 7 wt% of Zn₅(OH)₆(CO₃)₂ provided a capacity of 18.4 μg As(V)/mg for residual concentration of 10 μg/L (pH 7) which is over twice that of an iron oxy-hydroxide prepared under similar conditions.