A5061341831- Mine drainage and remediation techniques
- Metal Extraction and Bioleaching
- Heavy metals in environment
- Geochemistry and Elemental Analysis
- Radioactive element chemistry and processing
- Extraction and Separation Processes
- Mining and Resource Management
- Tailings Management and Properties
- Chromium effects and bioremediation
- Microbial Community Ecology and Physiology
- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Antimicrobial agents and applications
- Planetary Science and Exploration
- Environmental Chemistry and Analysis
- Minerals Flotation and Separation Techniques
- Arsenic contamination and mitigation
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Adsorption and biosorption for pollutant removal
- Wastewater Treatment and Nitrogen Removal
- Clay minerals and soil interactions
- Radioactivity and Radon Measurements
- Environmental remediation with nanomaterials
- Genomics and Phylogenetic Studies
University of the Free State
2014-2024
Schlumberger (British Virgin Islands)
2018
Universidad de Huelva
2010-2012
Freshwater is a scarce resource that continues to be at high risk of pollution from anthropogenic activities, requiring remediation in such cases for its continuous use. The agricultural and mining industries extensively use water nitrogen (N)-dependent products, mainly fertilizers explosives, respectively, with their excess accumulating different bodies. Although removal NO3 soil through the application chemical, physical, biological methods has been studied globally, these seldom yield N2...
Rare earth metals are widely used in the production of many modern technologies. However, there is concern that supply cannot meet growing demand near future. The extraction from low-grade sources such as geothermal fluids could contribute to address increasing for these compounds. Here we investigated interaction and eventual bioaccumulation europium (Eu) by a thermophilic bacterium, Thermus scotoductus SA-01. We demonstrated this bacterial strain can survive high levels (up 1 mM) Eu, which...
The disposal of mining wastes that contain cyanide are dumped in tailings from gold extraction is a public concern countries such as South Africa. Many studies have shown the potential microorganisms to degrade cyanide. However, no in-situ exploration, contaminated with cyanide, capability indigenous act natural barrier for attenuation has been performed. Here we aim combine geochemical and metagenomics techniques reveal genomic machinery bacteria tailings. Indigenous (i.e.,...
The biorecovery of europium (Eu) from primary (mineral deposits) and secondary (mining wastes) resources is interest due to its remarkable luminescence properties, important for modern technological applications. In this study, we explored the tolerance levels, reduction intracellular bioaccumulation Eu by a site-specific bacterium, Clostridium sp. 2611 isolated Phalaborwa carbonatite complex. was able grow in minimal medium containing 0.5 mM Eu3+. SEM-EDX analysis confirmed an association...
One of the consequences mining is release heavy metals into environment, especially water bodies. Phytoremediation areas contaminated by using Vetiver grass and Indian mustard cost-effective environmentally friendly. This study aimed at enhancing remediation metal through simultaneous hybrid application clay minerals (attapulgite bentonite) or mustard. A 21-day greenhouse experiment was carried out to investigate effectiveness improve phytoremediation. The highest accumulation aluminium (Al)...
Glyphosate [N-(phosphonomethyl) glycine] is the most widely used systematic non-selective herbicide worldwide. However, there increasing concern about its potential impacts on soil microbial communities, which play crucial roles in maintaining functions, plant health, and crop productivity. While glyphosate can be inactivated through strong sorption, desorption remains a significant challenge as residues metabolites exert toxicity effects agroecosystems, particularly by altering diversity...
Acid mine drainage remediation is an unresolved matter in abandoned mining districts around the world. Development and implementation of passive treatment systems these areas are commonly focused on engineering water quality aspects. Neoformed mineral phases precipitated within reactive material treatments account for removal pollutants but also can cause clogging passivation substrate. After 20 months operation monitoring, limestone-based system implemented Mina Esperanza (SW Spain) was...
Metal removal and neutralization of acid mine drainage (AMD) in treatment systems is often controlled by addition alkaline reagents metal hydrolysis reactions. To overcome the disadvantage high cost conventional treatments, use paper mill wastes was evaluated as an additive to treat AMD at sites within Iberian Pyrite Belt (IPB) through batch experiments laboratory. Paper include three by-products from kraft pulping a nearby mill: green liquor dregs, slacker grits, lime mud. When interacted...
Abstract Investigations of abiotic and biotic contributions to dissolved organic carbon (DOC) are required constrain microbial habitability in continental subsurface fluids. Here we investigate a large (101–283 mg C/L) DOC pool an ancient (>1Ga), high temperature (45–55 °C), low biomass (10 2 −10 4 cells/mL), deep (3.2 km) brine from uranium-enriched South African gold mine. Excitation-emission matrices (EEMs), negative electrospray ionization (–ESI) 21 tesla Fourier-transform ion...
Phytoremediation is limited when heavy metals reduce soil quality and, subsequently, inhibit plant growth. In this study, we evaluated the use of attapulgite and bentonite as amendments in contaminated with multiple metals, to improve phytoremediation capacity Vetiver grass Indian mustard. A 21-day greenhouse study was undertaken, investigate tolerance heavy-metal-contaminated soil, well heavy-metal absorption roots shoots. The results showed a generally higher root-uptake rate for Cr, Cu,...
Geochemical and isotopic fluid signatures from a 2.9–3.2 km deep, 45–55 °C temperature, hypersaline brine Moab Khotsong gold uranium mine in the Witwatersrand Basin of South Africa were combined with radiolytic water–rock exchange models to delineate evolution over geologic time, explore conditions for habitability. The brines (Ca-Na-Cl) 215–246 g/L TDS, Cl− concentrations up 4 mol/L suggesting their position as end-member significantly more saline than any previously sampled fluids....
Nitrate contamination in water remains to be on the rise globally due continuous anthropogenic activities, such as mining and farming, which utilize high amounts of ammonium nitrate explosives chemical-NPK-fertilizers, respectively. This study presents insights into development a bioremediation strategy remove nitrates (NO 3 − ) using consortia enriched from wastewater collected diamond mine Lesotho platinum South Africa. A biogeochemical analysis was conducted samples aided comparing...
Hormesis, or the hormetic effect, is a dose- concentration-dependent response characterised by growth stimulation at low concentrations and inhibition high concentrations. The impact of sub-lethal levels disinfectants on Serratia species critical to understanding increasing number outbreaks caused this pathogen in healthcare settings. sp. HRI marcescens ATCC 13880 were cultivated benzalkonium chloride (BAC), Didecyldimethylammonium (DDAC), VirukillTM. maximum specific rates, doubling times,...