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dc.contributor.advisor Ramadan, Adham
dc.contributor.author El Maghraby, Yasmin Mohamed Raafat
dc.date.accessioned 2013-05-29T10:57:15Z
dc.date.created 2013 Spring en
dc.date.issued 2013-05-29
dc.identifier.uri http://dar.aucegypt.edu/handle/10526/3563
dc.description.abstract Two types of Activated Carbon (AC) were prepared. Date pits Activated Carbon (DAC) and apricot stones Activated Carbon (AAC) were produced through chemical activation with H3PO4. AC characterization was carried out by: N2 adsorption, Fourier Transform Infrared spectroscopy, Scanning electron microscopy and Elemental analysis. Guava juice was browned and an initial Absorbance value was selected. The adsorption of dark colored compounds from Guava juice by DAC and AAC was studied at a temperature range of 25–60 °C. The equilibrium isotherm for each dark colored compound: DAC/AAC system was determined. Absorbance data at 420 nm were used to plot all the isotherms that are correlated reasonably well with the Langmuir, Freundlich, Temkin and Frumkin isotherms. The Frumkin isotherm provided the best correlation for the dark colored compounds proving that there exists a lateral interaction among the adsorbed species. Five kinetic models were evaluated to fit the experimental data: the Pseudo-1st- order, the Pseudo-2nd-order, the Modified Freundlich, the Pore Diffusion and the Elovich models. The kinetic parameters of each model were calculated. The adsorption process was well described with Modified Freundlich, Pore Diffusion and Elovich models for adsorption kinetics revealing that intraparticle diffusion mechanisms and chemisorption were involved in the adsorption process. The calculated activation energy values obtained were contradictory and non conclusive for different models. en
dc.format.extent 121 p. en
dc.format.medium journals (periodicals) en
dc.language.iso en en
dc.rights Author retains all rights with regard to copyright. en
dc.subject Carbon, Activated en
dc.subject Guava industry en
dc.subject Concentrated fruit juices en
dc.subject.lcsh Thesis (M.S.)--American University in Cairo en
dc.subject.lcsh Carbon, Activated.
dc.subject.lcsh Concentrated fruit juices.
dc.subject.lcsh Guava industry.
dc.title Adsorption of dark colored compounds from guava juice by activated carbon en
dc.type Text en
dc.subject.discipline Chemistry en
dc.rights.access This item is restricted forever en
dc.contributor.department American University in Cairo. Dept. of Chemistry en
dc.embargo.lift 10000-01-01
dc.description.irb American University in Cairo Institutional Review Board approval is not necessary for this item, since the research is not concerned with living human beings or bodily tissue samples. en
dc.contributor.committeeMember Ramadan, Adham
dc.contributor.committeeMember El Sayed, Mayyada
dc.contributor.committeeMember Gibriel, Ahmed
dc.contributor.committeeMember Ragai, Jehane


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  • Theses and Dissertations [1728]
    This collection includes theses and dissertations authored by American University in Cairo graduate students.

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