Browsing Department of Chemistry by Author "Petrik, Leslie"
Now showing items 1-20 of 27
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Active neutralisation and amelioration of acid mine drainage with fly ash
Surender, Damini (University of the Western Cape, 2009)Fly ash and AMD samples were characterised by standard analytical methods for selection of the test materials. Active treatment by means of mixing fly ash with AMD in beakers and a large tank at pre-determined ratios have ... -
Active neutralisation and amelioration of acid mine drainage with fly ash
Surender, Damini (University of the Western Cape, 2009)Due to the constraints being placed on water resources and a drive for major industries to recycle waste water, improved and cheaper water treatment technologies are being investigated. During mining, pyrite (FeS2), a ... -
Advanced oxidative water treatment process using an electrohydraulic discharge reactor and TiO2 immobilised on nanofibres
Okolongo, Gauthier Nganda (University of Western Cape, 2013)The aim of this study was to design and build an electrohydraulic discharge reactor in such a way that the synthetic immobilized TiO2 nanophotocatalytic components could be integrated, for the production of active species ... -
Chemical interactions and mobility of species infly ash-brine co-disposal systems
Fatoba, Ojo Olanrewaju (University of the Western Cape, 2010)The primary aim of these coal fired industries for co-disposing fly ash and brine was to use the fly ash as a sustainable salt sink. It is therefore important to study the interaction chemistry of the fly ash-brine systems ... -
Chemical, physical and morphological changes in weathered coal fly ash : a case study of brine impacted wet ash dump
Eze, Chuks Paul (University of the Western Cape, 2011)Fly ash is the major waste material produced by power plants in the combustion of coal to generate electricity. The main constituents of fly ash are Si, Al, Fe and Ca with smaller amount of S, Mn, Na, K, and traces of ... -
Chemistry and speciation of potentially toxic and radioactive elements during mine water treatment
Madzivire, Godfrey (University of the Western Cape, 2012)Mine water poses a serious environmental challenge and contains elements such as Fe, Al, and Mn in potentially toxic concentrations. The major anion in mine water is sulphate. The complexity and diversity of mine water ... -
CO2 sequestration using brine impacted fly ash
Muriithi, Grace Nyambura (University of the Western Cape, 2009)Coal combustion accounts for over 40 % of the world's energy production and this figure is projected to increase with increasing human population and industrialization. The combustion of coal leads to the generation of ... -
Coal fly ash and acid mine drainage based heterogeneous Fe catalysts Friedel-Crafts alkylation reaction
Hlatywayo, Tapiwa (University of Western Cape, 2020)The catalytic support materials used in the present study are zeolite HBEA and MCM-41. These high silica zeolites were synthesised from coal fly ash (CFA) waste via a novel approach that involved a fusion step, acid assisted ... -
The composition of photocatalytic nanofibres through electrospinning
Farao, Al Cerillio (University of the Western Cape, 2014)The aim of this study was to enrich electrospun fibres with the active mineral phase TiO2 nanoparticles and then to evaluate how well the composite fibres performed in the photocatalytic degradation of methylene blue ... -
Degradation of persistent organic pollutants (pharmaceuticals & dyes) by combined dielectric barrier electrohydraulic discharge system and photo catalysts
Mouele, Emile Salomon Massima (University of the Western Cape, 2019)Water pollution problems have continued to increase not only in South Africa but worldwide due to human activities. The presence of organic toxins and bacteria in water sources is mostly due to population growth, industrial ... -
Determination of toxic elements, rare earth elements and radionuclides in coal fly ash, products and waste
Eze, Chuks Paul (University of the Western Cape, 2014)Coal fly ash has been studied extensively to understand the environmental impacts associated with its disposal, management and reuse. Although several beneficiation processes have been proposed, there has been little or ... -
Fabrication of nanomaterials from biomass for adsorption and antimicrobial applications
Uche, Cosmas Chinedu (University of the Western Cape, 2020)The Black soldier fly (BSF) is an environmentally friendly and sustainable insect utilised in the decomposition of organic waste. This is due to its voracious consumption capability, disruptive functions and economic ... -
The fate and transport of carbon-based nanomaterials in the environment
MacDonald, Riccarda Thelma (University of Western Cape, 2020)The interest in carbon-based nanomaterials, such as carbon-nanodots and graphene, has grown exponentially because these materials have unique properties and applications in the medical, electronic, clean energy and several ... -
Functionalisation of electrospun nanofibre for lanthanide ion adsorption from aqueous solution
Pereao, Omoniyi Kolawole (University of the Western Cape, 2018)Rare earth elements (REEs) have widespread use and importance for industrial applications due to their metallurgical, optical and electronic properties. Several typical hydrometallurgical techniques such as adsorption, ... -
Functionalisation of polymer nanofibres and track-etched membrane removal of organic and and inorganic pollutants from water
Bode-Aluko, Chris Ademola (University of the Western Cape, 2017)Organic and inorganic pollutants are two broad classes of pollutants in the environment with their main sources from waste waters that are indiscriminately dumped from chemical related industries. Among the organic ... -
Ion exchange resins an functional fibres: a comparative study for the treatment of brine waste water
Yalala, Bongani Ndhlovu (University of the Western Cape, 2009)To improve the adsorption capacity of polyacrylonitrile (PAN) fibres, hydrophilic amidoxime fibres were prepared by subsequent conversion of the cyano groups to an amidoxime group by reacting with hydroxylamine at 80°C at ... -
Long-range transport clusters, fine particulate matter (PM2.5) and soot concentrations of air masses in Cape Town, South Africa
Williams, John Peter (University of the Western Cape, 2018)Ambient air pollution is the biggest environmental threat to human health. According to the World Health Organisation (WHO), ambient air pollution kills millions of people worldwide every year. Airborne particulate matter ... -
Method development for selective recovery of rare earths elements from phosphogypsum waste
Muvumbu, Jean-Luc Mukaba (University of Western Cape, 2021)The need for rare earth elements (REEs) in current technologies has motivated countries with high imports dependency to search for alternatives sources. Several studies have been carried out to investigate the feasibility ... -
Optimisation of biodiesel production via different catalytic and process systems
Babajide, Omotola Oluwafunmilayo (University of the Western Cape, 2011)The production of biodiesel (methyl esters) from vegetable oils represents analternative means of producing liquid fuels from biomass, and one which is growing rapidly in commercial importance and relevance due to increase ... -
Preparation and characterization of highly active nano pt/c electrocatalyst for proton exchange membrane fuel cell
Ying, Qiling (University of the Western Cape, 2006)Catalysts play an essential role in nearly every chemical production process. Platinum supported on high surface area carbon substrates (Pt/C) is one of the promising candidates as an electrocatalyst in low temperature ...