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ADSORPTION OF LEAD AND ARSENIC FROM AQUEOUS SOLUTIONS USING VOLCANIC TUFF AND WALNUT SHELLS


DEDIU VIOLETA1, EL BOUTAYBI BELAL2
National Research and Development Institute in Microtechnologies – IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190, Bucharest, violeta.dediu@imt.ro, Romania)
2 Université Paul SABATIER Toulouse III, IUT Mesures Physiques, 115 C Route de Narbonne, 31077 Toulouse Cedex 4, Bilalebeb@hotmail.com, France)

Issue:

PLUMEE, Number 1, Volume IX

Section:

Issue No.1 - Volume 9 (2019)

Abstract:

Volcanic tuff and walnut shells were tested as natural adsorbents materials for

the removal of Pb(II) and As(V) from waste water. Inductively coupled plasma mass

spectrometer (ICP-MS) and an atomic absorption spectrometer were used to monitor the

concentration of metal ions in aqueous systems. The sorption capacity of these adsorbents

were evaluated at different experimental conditions. The effect of time, initial concentration

of the metals and the adsorbent dose on the adsorption was studied. The lead removal

efficiency using volcanic tuff at pH value of 4 was more than 99 % in all concentration

range investigated, while in the case walnut shells at pH value of 2, the maximum

efficiency was 53.2%. Regarding the arsenic uptake at low concentration, the best

performance was registered for walnut shells (50.15%). The two low-cost natural sorbents

were efficient to remove both pollutants from aqueous systems and may be considered as a

viable alternative to conventional adsorbents.

Keywords:

natural adsorbents, heavy metals, volcanic tuff, walnut shells.

Code [ID]:

PLUMEE201901V09S01A0007 [0004975]

Note:

Full paper:

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