A5069835171- Analytical chemistry methods development
- Heavy metals in environment
- Radioactive element chemistry and processing
- Adsorption and biosorption for pollutant removal
- Electrochemical Analysis and Applications
- Extraction and Separation Processes
- Mercury impact and mitigation studies
- Toxic Organic Pollutants Impact
- Moringa oleifera research and applications
- Analytical Chemistry and Sensors
- Geochemistry and Geologic Mapping
- Mine drainage and remediation techniques
- Analytical Chemistry and Chromatography
- Mass Spectrometry Techniques and Applications
- Metal Extraction and Bioleaching
- Heavy Metal Exposure and Toxicity
- Environmental Toxicology and Ecotoxicology
- Effects and risks of endocrine disrupting chemicals
- Microplastics and Plastic Pollution
- Chemical Synthesis and Characterization
- Nanoparticles: synthesis and applications
- Electrochemical sensors and biosensors
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Chemical Sensor Technologies
- Heavy Metals in Plants
University of the Witwatersrand
2014-2023
University of Warsaw
2014
University of Venda
2004
Lund University
2004
Masaryk University
2000-2001
Sefako Makgatho Health Sciences University
1995-1998
University of Limpopo
1998
Maria Curie-Skłodowska University
1980-1991
Moringa species are multipurpose plants with nutritional, medicinal and industrial benefits. The flavonoids content of oleifera ovalifolia was studied using an Ultra high-performance liquid chromatography coupled electrospray ionization quadrupole time-of-flight mass spectrometry (UHPLC-ESI-qTOF-MS). results revealed that the two contain at least 17 compounds between them. However, M. found to most than which contained only three total flavonoids. Furthermore, all in were shown be...
Mercury (Hg) emissions from coal combustion contribute approximately half of anthropogenic Hg to the atmosphere. With implementation first legally binding UNEP treaty aimed at reducing emissions, identification and traceability different countries/regions are critically important. Here, we present a comprehensive world stable isotope database including 108 new samples major coal-producing deposits in South Africa, China, Europe, India, Indonesia, Mongolia, former USSR, U.S. A 4.7‰ range...
The antioxidant activity of the leaves and flowers Moringa oleifera plant were investigated results compared to those selected vegetables (cabbage, spinach, broccoli, cauliflower peas). Antioxidant was determined by analysing total phenolics content, flavonoids reducing power radical scavenging using 2,2-diphenyl-1-picrylhydrazyl free method. content moringa almost twice that three times vegetables. higher than percentage radicals remaining lower with These combined show is a good source...
In this study, the occurrence in wastewater of two non-steroidal anti-inflammatory drugs (NSAIDs), naproxen and ibuprofen, one personal care product, triclosan, was assessed using polar organic chemical integrative sampler (POCIS). The samplers were initially calibrated laboratory to obtain sampling rates (Rs) for each target compound followed by deployment influent effluent Goudkoppies Northern Wastewater Treatment Plants (WWTPs), South Africa. Exposure done 14 days 2012. High performance...
Moringa (Moringa oleifera) is a plant that commonly consumed as nutritional supplement by some communities in South Africa. Contamination of moringa with toxic heavy metals could be deadly for consumers. However, metal elements are essential consumers trace amounts. We therefore investigated the concentrations metals, including major and nutrient elements, soil leaves flowers grown on two farms After total digestion microwave, were determined using inductively coupled plasma optical emission...
Phytochemicals of Cannabis sativa mainly for the use in different industries are that delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). Pressurized hot water extraction (PHWE) is seen as an efficient, fast, green technique removal polar semi-polar compounds from plant materials. The PHWE was applied to extract cannabinoid seed. Response surface methodology used investigate influence time (5–60 min), temperature (50–200 °C) collector vessel (25–200 on recovery (THC), cannabinol (CBN),...
Silver nanoparticles offer a wide range of benefits including their application in several fields such as medical, food, health care, consumer, and industrial purposes. However, unlocking this potential requires responsible co-ordinated approach to ensure that challenges emanating from the use silver are being addressed. In study body fluids environmental media were used investigate effects citrate coated (cit-coated AgNPs) mimic behaviour real life situations. Understanding dissolution...