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Uptake of As(V) from aqueous solution by anionic clays type FeLDHs

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: G. Carja, S. Ratoi, G. Ciobanu, I. Balasanian

Editorial: Desalination, 223 (1-3), p.243-248, 2008.


The nature of the metal (Mg and/or Fe) salts, used as precursors during the synthesis process of layered double
hydroxides, is used as a controlled variable synthesis parameter to obtain iron-containing anionic clay matrices
with specific properties. The XRD and N2 adsorption at 77 K analyses indicate that the structural and the textural
features of the synthesized clays are influenced by the use of chloride, sulphate or nitrate, as different salts
precursors, during the clay synthesis. The As(V) removal capacity of the tested clays is also a function of the
nature of the used salt precursors, the maximum value, equal to nearly 72%, being reached when iron sulphate is
used as precursor in the clay synthesis process. After calcination, the arsenate removal capacity is higher than
90% for all the samples.

Cuvinte cheie: Arsenate removal, Anionic clays, Layered double hydroxides