A5043868014- Metal Extraction and Bioleaching
- Minerals Flotation and Separation Techniques
- Extraction and Separation Processes
- Corrosion Behavior and Inhibition
- Odor and Emission Control Technologies
- Bauxite Residue and Utilization
- Mine drainage and remediation techniques
- Chalcogenide Semiconductor Thin Films
- Industrial Gas Emission Control
- Wastewater Treatment and Nitrogen Removal
- Polymer-Based Agricultural Enhancements
- Electrochemical Analysis and Applications
- Composting and Vermicomposting Techniques
- Phosphorus and nutrient management
- Lanthanide and Transition Metal Complexes
- Magneto-Optical Properties and Applications
- Hydrogen embrittlement and corrosion behaviors in metals
- Microbial Fuel Cells and Bioremediation
- Arsenic contamination and mitigation
- Food Supply Chain Traceability
- Municipal Solid Waste Management
- Thermography and Photoacoustic Techniques
- Chromium effects and bioremediation
- Metallurgical Processes and Thermodynamics
- Pesticide and Herbicide Environmental Studies
Universidade Estadual Paulista (Unesp)
2016-2025
Centro Universitário de Araraquara
2006-2020
Tampere University
2013-2014
Oxidative dissolution of chalcopyrite at ambient temperatures is generally slow and subject to passivation, posing a major challenge for developing bioleaching applications this recalcitrant mineral. Chloride known enhance the chemical leaching chalcopyrite, but much effect has been demonstrated elevated temperatures. This study was undertaken test whether 100–200 mM Na-chloride enhances bacterial in shake flasks stirred tank bioreactor conditions mesophilic Acidithiobacillus ferrooxidans,...
Magneto-optical borogermanate glasses were developed by incorporating electro-electronic waste recovered from fluorescent lamps. Glasses with a composition of (41GeO₂-25B₂O₃-4Al₂O₃-10Na₂O-20BaO)-x%wst, (x = 0, 10, 20, 30, and 50 wt% waste) prepared. The final chemical was determined, the characterized through thermal, structural, morphological, optical, magneto-optical analyses. addition lamp to glass matrix did not induce crystallization stable materials obtained, as confirmed thermal...
The oxidation of finely ground (−200 μm) bornite (Cu5FeS4) by Acidithiobacillus ferrooxidans was evaluated in oxygen uptake and shake flasks experiments. a net acid-consuming reaction. Residual not detected X-fray diffraction solids after 2 days contact acid leach solution, indicating that the chemical biological relatively fast. Virtually 100% copper solubilization achieved A. cultures with or without ferrous iron, while abiotic controls extraction around 30%. Bornite oxidized thiooxidans...
Copper is a metal with great economic interest and about 70% found in nature chalcopyrite form (CuFeS2). However the dissolution challenge for industries as well researchers because of its slow kinetics. The control redox potential one factor that can help this drawback. This study was undertaken to evaluate role on bioleaching by addition ferrous ions. Acid leaching ions promoted high maintenance low (420 mV/Ag/AgCl). On other hand, copper bacterial systems showed recovery (610 XRD solid...
The packing material selection for a bioreactor is an important factor to consider, since the characteristics of this can directly affect performance bioprocess, as well investment costs. Different types low cost materials were studied in columns reduce initial and operational costs biogas biodesulfurization. most prominent (PVC pieces from construction pipes) was applied bench-scale biotrickling filter remove H2S real sewage treatment plant Brazil, responsible 90 thousand inhabitants. At...
Bornite electrodes were characterized in the absence or presence of Acidithiobacillus ferrooxidans, which is an important microorganism involved metal bioleaching processes. The bacterium modified mineral/electrolyte interface, increasing corrosion rate, as revealed by interferometric, AEM, ICP and EIS analyses. As a consequence bacterial activity electrode became porous, its surface heterogeneity. This behavior was correlated with evolution impedance diagrams obtained during time course...
The use of carbon paste electrodes (CPE) mineral sulfides can be useful for electrochemical studies to overcome problems by using massive ones. Using CPE-chalcopyrite some variables were electrochemically evaluated. These were: (i) the atmosphere preparation (air or argon) CPE and elapsed time till its use; (ii) scan rate voltammetric measurements (iii) chalcopyrite concentration in CPE. Based on cyclic voltammetry, open-circuit potential impedance results recommendations are: oxygen-free...
Biosorption has been considered a promising technology for the treatment of industrial effluents containing heavy metals. However, development cost-effective technique biomass immobilization is essential successful application biosorption in processes. In this study, new method reversible encapsulation highly pigmented from Aspergillus nidulans mutant using semipermeable cellulose membrane was developed and efficiency encapsulated biosorbent removal recovery copper ions evaluated. Data...