%0 Journal Article
%T Activated Carbon Based on Acacia Wood (<i>Auriculeaformis</i>, C&ocircte dĄ¯Ivoire) and Application to the Environment through the Elimination of Pb<sup>2+</sup> Ions in Industrial Effluents
%A Drissa Ouattara Kra
%A Grah Patrick Atheba
%A NĄ¯da Ars¨¨ne Kouadio
%A Patrick Drogui
%A Albert Trokourey
%J Journal of Encapsulation and Adsorption Sciences
%P 18-43
%@ 2161-4873
%D 2021
%I Scientific Research Publishing
%R 10.4236/jeas.2021.111002
%X The objective of this study is to develop carbon, that of &lt;i&gt;</span><i><span style=\"font-family:Verdana;\">Acacia
auriculeaformis</span></i><span style=\"font-family:Verdana;\">&lt;/i&gt;</span><span style=\"font-family:Verdana;\"> through its activation in order to eliminate lead in an aqueous medium. A
series of activated carbon has been prepared by chemical activation with
phosphoric acid, sodium hydroxide and sodium chloride. The determi</span><span style=\"font-family:Verdana;\">nation of the physico-chemical properties of the
prepared carbon guided the choice of phosphoric acid activated carbon as the
best adsorbent for the</span><span style=\"font-family:Verdana;\"> elimination of lead(II) in </span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">an </span></span></span><span><span><span style=\"font-family:&quot;\"><span style=\"font-family:Verdana;\">aqueous solution. Pb</span><sup><span style=\"font-family:Verdana;\">2+</span></sup><span style=\"font-family:Verdana;\"> adsorption tests in batch mode have
shown that the adsorption capacity is influenced by various parameters such as
mass, pH, concentration of Pb&lt;sup&gt;2+&lt;/sup&gt; ions and contact time
linked to the medium and the adsorbent. Adsorption isotherms, kinetic models
and thermodynamics have been used to describe the adsorption process. The
equilibrium data for activated charcoal correspond well to the model of
Freundlich, </span><span style=\"font-family:Verdana;\">Langmuir, Temkin and Kiselev.
The kinetic adsorption data proved to be </span><span style=\"font-family:Verdana;\">better described by the
pseudo-second order model with </span><span style=\"font-family:Verdana;\">external and
intraparticle diffusion which are two decisive steps in the</span><span style=\"font-family:Verdana;\"> adsorption
process of Pb&lt;sup&gt;2+&lt;/sup&gt; ions. Thermodynamics and adsorption
isotherms predict a spontaneous exothermic surface reaction, of the
chemisorption type, with ion </span><span><span style=\"font-family:Verdana;\">retention in
orderly monolayers on the heterogeneous surface of the adsorbent. Tests carried
out with this adsorbent material have contributed to the elimination of the Pb</span><sup><span style=\"font-family:Verdana;\">2+</span></sup><span style=\"font-family:Verdana;\"> ions contained in an industrial effluent with a </span></span><span style=\"font-family:Verdana;\">reduction rate reaching
42.52% against 85.90% in a synthetic solution.
%K &lt
%K i&gt
%K Acacia auriculeaformis&lt
%K /i&gt
%K Activated Carbon
%K Lead(II) Ion
%K Adsorption Isotherms
%K Kinetics
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=108132