%0 Journal Article
%T Physico-Chemical Study of the Adsorption of Carotenoids from Carrots on Raw and Modified Kaolinites
%A Orl¨Ļans Ngomo
%A Etienne Dongo
%A Joseph Sieliechi
%J Advances in Chemical Engineering and Science
%P 132-148
%@ 2160-0406
%D 2023
%I Scientific Research Publishing
%R 10.4236/aces.2023.132011
%X This study focuses on the
adsorption at temperatures below 70</span><span style=\"white-space:nowrap;font-family:Verdana;\">&amp;#8451;</span><span style=\"font-family:Verdana;\"></span><span style=\"font-family:Verdana;\">, of </span></span><span style=\"font-family:Verdana;\">carotenoids from carrots on clay materials such as
kaolinite in the raw state, activated with a 0.5</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">M HCl solution or treated with a sodium solution of
Al</span><sup><span style=\"font-family:Verdana;\">+</span></sup><span style=\"font-family:Verdana;\">. The kinetic study of
carotenoid adsorption shows that equilibrium is reached after 30 minutes and
the temperature has little influence on carotenoid adsorption. On the other
hand, the quantities adsorbed at equilibrium increase with the initial
concentration of carotenoids. The kinetic model that best describes the
experimental data is that of the pseudo-second order, adsorption is made in two
time. For the carotenoid adsorption isotherms, the best correlation is obtained
with the Freundlich model. The low values </span><span style=\"font-family:Verdana;\">of the Freun</span><span style=\"font-family:Verdana;\">dlich
constants indicate that the adsorption is probably of a physical type. This
conclusion is confirmed by the effective desorption of carotenoids observed
during desorption experiments.
%K Kaolinite
%K Carrots
%K Antioxidant
%K Cosmetic
%K Adsorption
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=124347