Industrial Applications of Clay Materials from Ghana (A Review)

Asamoah, Richard; Nyankson, Emmanuel; Annan, Ebenezer; Agyei‐Tuffour, Benjamin; Efavi, Johnson Kwame; Kan-Dapaah, Kwabena; Apalangya, Vitus A.; Damoah, Lucas Nana Wiredu; Dodoo‐Arhin, David; Tiburu, Elvis K.; Kwofie, K.; Onwona-Agyeman, B.; Yaya, Abu

doi:10.13005/ojc/340403

Cited by 13 publications

(10 citation statements)

References 95 publications

(60 reference statements)

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“…Clay material presents suitable properties for the design of a membranes system. Clay materials possess biocidal activities against a host of microbial species [ 12 ]. Polymeric materials implemented in a reverse osmosis process for water purification were susceptible to fouling [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Clay–Nanocomposites for Water Purification

et al. 2020

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In this work we propose a facile method of preparing cost-effective clay-metaloxide/metal (CuO/Ag and ZnO/Ag) composite pellets for an efficient water purification technique. Clay, with intrinsic antibacterial activity, served as a membrane support for different metaloxide/Ag nanoparticles (NPs) concentrations (2.5, 5 and 10 wt.%), as the active fillers. The effect of time (24 and 48 h) on the bactericidal activity of these pellets was also monitored. The clay–nanocomposite pellets were characterized using: X-ray diffraction, X-ray fluorescence, scanning electron microscopy, transmission electron microscopy, ultraviolet–visible (UV–Vis) spectrophotometry and nitrogen desorption analysis. The antibacterial activity performance was tested using E. coli and S. aureus strains of ATCC25922 and ATCC25923, respectively, in two aqueous media (nutrient broth and nutrient-free) by the colony-forming unit method. The results showed that the clay-CuO/Ag composite with a bandgap (1.24 eV) exhibited overall best performance under all conditions and time factors of ~100% efficiency in nutrient-free medium for all concentrations and times and 20–40% efficiency in nutrient broth for 24 h. The clay-ZnO/Ag with a bandgap of 2.88 eV showed no bactericidal activity in both media, except for that with 10 wt.% ZnO/Ag which showed 100% efficiency in nutrient-free medium after 24 h. All the synthesized composites showed 100% bactericidal efficiency in nutrient free medium after 48 h. These results indicate that, the clay/metaloxide/Ag could serve as efficient water purification technique, with a potential for large-scale commercialization.

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Section: Introductionmentioning

confidence: 99%

Development and Characterization of Clay–Nanocomposites for Water Purification

et al. 2020

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“…As a result, the motivation to collect and subject the clay sample to further laboratory examination in the hope of adding meaning to the material culture cannot be overstated. More so, the medical properties of clay minerals have been known by Ghanaians for centuries (Asamoah et al, 2018), and the biological implications of clay materials are also an area of intense interest due to their geophagy practices amongst Ghanaians especially pregnant women. These clays are widely used for healing purposes due to their perceived efficacy in curing multiple ailments including scorpion bites, chronic headaches, joint and other bodily pains, insanity and female infertility (Van Dongen et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Dual application of natural clay material for decolorization and adsorption of methylene blue dye

et al. 2020

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In this study, a clay sample recovered from an archaeological excavation from the Krobo Mountains in Ghana was examined for its potential to decolorize and adsorb cationic methylene blue. The raw and calcined clay samples were characterized with XRD, SEM, FTIR and EDX. The supernatant obtained by washing the raw clay with 70% ethanol solution decolorized methylene blue. The decolorization of methylene blue was independent of calcination temperature up to 300°C. The clay material subjected to calcination temperature at 600°C showed strong adsorption towards cationic methylene blue. The equilibrium adsorption data fitted well with the Freundlich isotherm indicating adsorption unto heterogeneous surface with the interaction between the adsorbed molecules which is not restricted to the formation of a monolayer. The data also fitted well with the Weber and Morris model which described the rate-controlling steps. The intra-particle diffusion was controlled by pore and surface diffusion. In addition, the adsorption data followed a pseudo-second-order kinetic model, indicating a chemisorption process. The results highlight a unique property of the clay material as an effective decolorizing and adsorption agent for the removal of water-soluble dyes from contaminated water bodies.

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“…Clays such as smectites, kaolinite and fibrous clay minerals have been applied widely for drug delivery systems because of their large specific surface area, pore volume and uniform porosity for sustained release [7]. Smectites in particular are frequently used as substrate, because it can retain large amounts of drug due to its cation exchange ability [7].…”

Section: Introductionmentioning

confidence: 99%

Characterization of some selected Ghanaian clay minerals for potential industrial applications

Onwona-Agyeman¹,

Yaya²,

Nzihou³

et al. 2020

Journal of Ceramic Processing Research

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The aim of this work was to study five (5) selected local raw clay materials from Ghana using different characterization techniques such as Thermogravimetric/Differential Thermal Analysis (TG/DTA), X-ray diffraction (XRD), Fourier Transform Infra-red Spectroscopy (FTIR), Scanning Electron Microscopy equipped with Energy Dispersive X-ray Spectroscopy (SEM-EDX) and Nitrogen Desorption (Brunauer-Emmett-Teller, BET) specific surface area analysis. The clay samples studied are; Nkroful kaolin (NK), Amanfrom kaolin (AK), Ball clay (BC), Akyem Feldspar (AF) and Akwatia silica (AS). SEM and EDX show the morphological features of the five clay samples and also confirm the presence of some dominant elemental compositions such as aluminium and silicon in all the samples. FTIR show that the vibrations spectra in the region around 3,600-3,700 cm −1 and 700-800 cm −1 are due to M-OH groups and that at 900-1000 cm −1 corresponds to Si-O-Si modes. BET analysis gives specific surface area of the clay samples as NK (4.6 m 2 /g), AK (21.9 m 2 /g), BC (25.50 m 2 /g), AS (0.79 m 2 /g) and AF (0.49 m 2 /g). X-ray diffraction pattern confirm the presence of quartz as the major reflection in all the samples analysed and only kaolinite reflections appeared in three of the samples (NK, AK and BC). All the kaolinite clays (NK, AK and BC) are suitable starting materials for the fabrication of electroporcelain insulators, catalytic converters and diesel particulate filters.

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Industrial Applications of Clay Materials from Ghana (A Review)

Cited by 13 publications

References 95 publications

Development and Characterization of Clay–Nanocomposites for Water Purification

Development and Characterization of Clay–Nanocomposites for Water Purification

Dual application of natural clay material for decolorization and adsorption of methylene blue dye

Characterization of some selected Ghanaian clay minerals for potential industrial applications

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