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Separation Science and Technology Volume 54, 2019 - Issue 11
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Adsorption

Effects of acid-basic treatments of date stones on lead (II) adsorption

Farouk BoudrahemLaboratoire de Génie de l’Environnement (LGE), Faculté de Technologie, Université de Bejaia, Bejaia, AlgérieCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0003-4138-6395
ORCID Icon,
Farida Aissani-BenissadLaboratoire de Génie de l’Environnement (LGE), Faculté de Technologie, Université de Bejaia, Bejaia, AlgérieORCID Iconhttps://orcid.org/0000-0002-6214-9922
ORCID Icon,
Fabrice AudonnetAxe GePEB, Istitut Pascal (UMR 6602), Université Blaise Pascal, Aubière, France
&
Christophe VialAxe GePEB, Istitut Pascal (UMR 6602), Université Blaise Pascal, Aubière, France
Pages 1749-1763 | Received 15 Nov 2017, Accepted 15 Oct 2018, Published online: 25 Oct 2018
 
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ABSTRACT

The effect of acid-basic treatments of date stones on lead adsorption was investigated. The physicochemical properties of this low-cost adsorbent were characterized by N2 adsorption and mass titration. The date stones sample, treated with HNO3, possess the highest surface oxygen containing functional groups (2.1 mmol/g), surface area (115 m2/g), and pore volume (0.048 cm3/g) and the more adsorption capacity to the lead(II) ions. The effect of contact time, initial concentrations of adsorbate, ionic strength, and adsorbent dose on the uptake of lead was studied in batch experiments. The sorption process was found to follow Redlich-Peterson isotherm and pseudo-second-order rate kinetics.

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