A5086822818- Metal Extraction and Bioleaching
- Minerals Flotation and Separation Techniques
- Extraction and Separation Processes
- Mine drainage and remediation techniques
- Recycling and Waste Management Techniques
- Corrosion Behavior and Inhibition
- Mineral Processing and Grinding
- Metallurgical Processes and Thermodynamics
- Chemical Safety and Risk Management
- Chromium effects and bioremediation
- Chemistry and Chemical Engineering
Universidad de Sevilla
2011-2024
The kinetics of bioleaching sulphide concentrates by Thiobacillus ferrooxidans can be improved performing separately the two operations relating effects involved in indirect contact mechanism, (1) chemical leaching and (2) biological oxidation Fe2+ produced stage (IBES: Indirect Bioleaching with Effects Separation). This scheme permits separate enhancement each stage. On one hand, attack ferric iron to sulphides performed at a higher temperature. other is more effective when biofilm models...
Copper smelter flue dust is a residue, rich in zinc, originating from the pyrometallurgical process of copper, and constitutes potential raw material for zinc production. In order to valorise this waste by hydrometallurgical processes, its leaching with sulphuric acid at constant pH studied. Experimental conditions (temperature, pH, pulp density) are optimised design experiments maximise Zn Cu extractions while minimising Fe. The experimental results fitted full-quadratic second-order...
In this work, the recovery of Cu from large waste printed circuit board (PCB) pieces by biogenic ferric sulphate at high solid to liquid ratio was studied. PCB parts were packed in a column and constantly recirculated. A oxidation reduction potential (ORP) decrease observed leaching due ion consumption; drop caused slower copper dissolution kinetics. After 25 days, 62.2% leached PCBs column. connected flooded packed-bed (FPB) bioreactor study biological regeneration consumed chemical...
The utility of ferrous iron biooxidation is to regenerate Fe(III) at required rates and conditions in specific hydrometallurgical contexts, such as metal extraction from ores/concentrates mining electronic waste. In these applications, considerable kinetics improvements can be achieved by increasing [Fe(III)], but pH must decreased avoid precipitation this oxidant. Information about continuous operation limited [Fe] < 20 g/L 2.3 > 1, therefore, it interesting test wider ranges for...
We are currently facing a change in the production model, moving from traditional linear model to based on circular economy. This new paradigm implies minimization of waste. In this context, work presents laboratory practice focused introducing concept economy and waste valorization undergraduate students. The experimental procedure is simpler adaptation earlier by research group which metals were recovered electric arc furnace dust (EAFD) it composed four stages: acid leaching dissolve...
Abstract BACKGROUND Cu is an indispensable natural resource for society, as its use widespread and essential many technologies. Consequently, worldwide production around 18×10 6 tn year −1 , close to 25% produced by bioleaching. Bioleaching enables extraction from minerals in atmospheric conditions virtue of the catalytic activity microorganisms. Microbial catalysis mainly based on Fe 3+ a leaching agent, process known 2+ bio‐oxidation. However, bio‐oxidation inhibited which limits...