A5033593124- Metal Extraction and Bioleaching
- Extraction and Separation Processes
- Pleistocene-Era Hominins and Archaeology
- Minerals Flotation and Separation Techniques
- Radioactive element chemistry and processing
- Heavy Metals in Plants
- Primate Behavior and Ecology
- Heavy metals in environment
- Forensic Anthropology and Bioarchaeology Studies
- Chemical Synthesis and Characterization
- Agricultural Science and Fertilization
- Graphite, nuclear technology, radiation studies
- Chemical and Physical Properties in Aqueous Solutions
- Recycling and Waste Management Techniques
- Seed and Plant Biochemistry
- Geochemistry and Geologic Mapping
- Plant Micronutrient Interactions and Effects
- Evolution and Paleontology Studies
- Archaeology and ancient environmental studies
Instytut Chemii i Techniki Jądrowej
2023-2025
University of Nairobi
2020-2024
The oldest Oldowan tool sites, from around 2.6 million years ago, have previously been confined to Ethiopia’s Afar Triangle. We describe sites at Nyayanga, Kenya, dated 3.032 2.581 ago and expand this distribution by over 1300 kilometers. Furthermore, we found two hippopotamid butchery associated with mosaic vegetation a C 4 grazer–dominated fauna. Tool flaking proficiency was comparable that of younger assemblages, but pounding activities were more common. use-wear bone damage indicate...
Nuclear power plants have the lowest life-cycle greenhouse gas emissions intensity and produce more electricity with less land use compared to any other low-carbon-emission-based energy source. There is growing global interest in Generation IV reactors and, at same time, there great using small modular reactors. However, development of new introduces engineering chemical challenges critical advancing nuclear safety, efficiency, sustainability. For III+ reactors, water chemistry control...
The increasing demand for critical metals essential renewable energy technologies necessitates efficient and environmentally sustainable extraction methods. Ilmenite (FeTiO3) similar ore deposits serve as abundant sources of primary elements while also incorporating a suite strategically significant trace elements, including REEs Hf, among others. Mixer–settler units are extensively utilized in metal purification processes. It is important to develop approaches tracking the metal’s process...
The increasing demand for critical metals has intensified efforts to recover valuable from various sources, including secondary waste. Zn-Pb tailings contain both major and trace with economic environmental significance. This study examined the extraction of transition using inductively coupled plasma mass spectrometry (ICP-MS) at a constant time 30 min. Metal efficiencies were evaluated N-Methyl-N,N,N-trioctylammonium chloride (Aliquat 336), methyl salicylate (MS), di(2-ethylhexyl)...
The extraction of useful minerals or geological materials from the Earth’s crust, most typically various sources, is crucial to a country’s development and progress. Mineral-rich countries use these resources transform their economies propel them toward long-term prosperity. There an urgent need for world increase mineral exploration efforts, improve recycling important metal-containing resources, extract using upgraded hydrometallurgical procedures with high recovery efficiency. This review...
The Homa Peninsula, in southwestern Kenya, continues to yield insights into Oldowan hominin landscape behaviors. Late Pliocene locality of Nyayanga (∼3-2.6 Ma) preserves some the oldest tools. At Early Pleistocene Kanjera South (∼2 toolmakers procured a diversity raw materials from over 10 km away and strategically reduced them grassland-dominated ecosystem. Here, we report findings Sare-Abururu, younger (∼1.7 approximately 12 southeast 18 east Nyayanga. Sare-Abururu has yielded 1754...
With advancements in hardware and software, non-destructive radiometric analytical methods have become popular a wide range of applications. A typical case is the study leaching process metals from mineral ores mine tailings. The objective current was to develop method based on neutron activation analysis (NAA), particular, delayed gamma (DGNAA), monitor Mn Zn Ti ore, Cu tailings, Zn-Pb DGNAA performed using source: deuterium-tritium (D-T) generator for MARIA research nuclear reactor Zn....
Solvent extraction of metals from Ti ore was investigated with a view enhancing yields by changing the concentration ligands, rate mixing, pH, and temperature solution. Norwegian leached 5M HNO3 alongside 10% ascorbic acid to obtain pregnant solution containing transition some rare earth elements (REEs). Part Two study will address recovery REEs in ore. The elemental analysis solid aqueous samples done two models total reflection X-ray fluorescence spectrometers (S2 PICOFOX, Bruker...
Abstract In Kenya, cases of malnutrition and nutritionally related ailments have been on the rise. This calls for search food crops with vital trace elements. The aim current study was to use energy dispersive X‐ray fluorescence spectroscopy (EDXRF) determine concentrations Zn, Fe, Cu, Mn in stems leaves African spider plant ( Cleome gynandra ) context nutrition. Stems grown highland lowland Molo Ward, Nakuru, were found contain total available Zn range 140 ± 50 230 60 mg/kg, Fe 2200 700...