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Title:	Physico - chemical behaviour of Sabha clays and its effect on calcination process in Metakaolin production
Authors:	Alhadi M Ali Shiwa (P51880)
Supervisor:	Azimah Hussin, Prof. Madya Dr.
Keywords:	Mines and mineral resources -- Libya Clay family Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia
Issue Date:	22-Jan-2018
Description:	Industrial Mineral (IM) is a universal non-metallic, low-priced commodity, sold in bulk and used widely as the ion exchanger and adsorption chemicals in various industries and the environment application. Adsorption ability of this IM depends on several factors, including changes in physical, geochemical segregations and modification process. Calcination is one of the techniques which are enabling to measure the adsorption ability of IM. In this study, sample of clays from Sabha in Libya was assessed to achieve objectives. To determine the mineralogical and geochemical content of the Sabha clay, evaluate the physical properties of Sabha clay, study the effects of calcination on Sabha clays, and identify the potential in industrial usage. The variation of Physico-chemical behaviours of Sabha clays has been evaluated based on a variety of techniques such as particle size, Brunnauer-Emmett-Teller (BET) surface area, zeta potential, x-ray diffraction analysis (XRD), x-ray fluorescence (XRF), Fourier Infrared Spectroscopy (FTIR), Differential Thermal Analysis (DTA) and Thermo Gravimetric Analysis (TGA). Methods of chemical analysis such as Induction Plasma Spectrometry (ICP-OES), Atomic Absorption Spectrometer (AAS), the simple exchange capacity (CEC) and Scanning Electron Microscopes (SEM) were also used throughout this study. Some physical properties of clays have also been identified: water content (W.C), Plasticity Index (PI), pH and the brightness test (BR). Sabha clays in this study have been modified through the process of calcination for one and a half hour in the temperature range of 700 -1000°C. The effect of calcinations on the properties of Sabha clays has also been studied. In addition to identifying the variation in Physico-chemical behaviours of Sabha Clays, this research has also proven that Sabha clay can be activated via the process of calcination which aims to enhance its industrial potential. This thesis shows that the studied IM was encompass with more than 70% of very fine particles (< 63 μm), and significantly varies in their physical and chemical composition. Calcination treatment for 1 and a half hours in the range of 700° -1000°C has typically changed the physical and geochemical characterization of the IM. Calcinations at 700° - 900°C were significantly contributed to the elemental compositional increment in the IM. Higher calcinations temperature (10000C) has a great impact on the IM morphology as almost all original crystal was vanished into dead burn forms. Thermal activation at 700° - 900°C and alkali treatment were successfully converted the Sabha kaolin into Metakaolin with greater cation exchange capacity 13.90 (meq/100g) closed with China kaolin was 16.63(meq/100g) and the listed CEC of Bidor kaolinite was low 3.80(meq/100g). Results of this study show that the Sabha kaolin has high potential for Metakaolin production., 'Certification of Master's/Doctoral Thesis' is not available,Ph.D.
Pages:	139
Call Number:	TN145.S535 2018 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Science and Technology / Fakulti Sains dan Teknologi

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