A5060177559- Extraction and Separation Processes
- Recycling and Waste Management Techniques
- Catalysis and Hydrodesulfurization Studies
- Metal Extraction and Bioleaching
- Chemistry Education and Research
- Catalytic Processes in Materials Science
- Radioactive element chemistry and processing
- Advancements in Battery Materials
- Nanomaterials for catalytic reactions
- Chemistry and Chemical Engineering
- Minerals Flotation and Separation Techniques
- Catalysis and Oxidation Reactions
- Science and Science Education
- Analytical chemistry methods development
- Electrochemical Analysis and Applications
- Zeolite Catalysis and Synthesis
- Petroleum Processing and Analysis
- Advanced oxidation water treatment
- Geochemistry and Elemental Analysis
- Various Chemistry Research Topics
- Hydrocarbon exploration and reservoir analysis
- Advanced Chemical Sensor Technologies
- Clay minerals and soil interactions
- History and advancements in chemistry
- Chemical Safety and Risk Management
Universidade Federal do Rio de Janeiro
2014-2024
Universidade do Estado do Rio de Janeiro
2022
Rede de Química e Tecnologia
2021
ORCID
2019
Nuclear Engineering Institute
2005-2013
Centre National de la Recherche Scientifique
1998-2000
Institut de Recherches sur la Catalyse et l'Environnement de Lyon
1991
In this paper the influence of calcination temperature on corrosion resistance a Ti/SnO2-Sb electrode prepared according to Pechini's method and its efficiency for phenol oxidation in chloride medium were investigated. When was performed at 600 °C tin distribution throughout film more uniform, providing homogeneous structure. Electrolysis 0.34 mol.L-1 NaCl solution containing 100 mg.L-1 10 mA.cm-2 30 minutes lead electrodes calcined 400 500 °C, whereas one remained practically unchanged,...
ELECTRONIC DEVICES.A hydrometallurgical process applicable to printed circuit boards of small electrical and electronic devices was developed.This involved three leaching steps (60 o C, 2 h): 6 mol L -1 NaOH, HCl aqua regia.NaOH removed the resin flame retardant that covered boards.HCl dissolved most electropositive metals a amount copper (~0.3 wt%).Aqua regia noble metals.Silver precipitated as AgCl.Gold platinum were quantitatively extracted with pure methylisobutylketone Alamine 336 (10 %...
The influences of electrolysis time, anodic area, current density and supporting electrolyte on phenol its byproducts degradation a Ti/RuO2 anode were investigated. It was observed that rapidly broken down in the presence chloride ions. Gas chromatography/mass spectrometry (GC/MS) data have shown ions lead to chlorophenols formation, due reactions with Cl2 and/or OCl¯ generated during electrolysis. However, these intermediate products also degraded later by oxidizing agents. standards...
The anode and the internal paste of spent Zn-C alkaline batteries were leached with 2 mol L-1 H2SO4 at 80 ºC for h. Solid/liquid ratio was 1/10 (g mL-1). leachate treated Na2S in order to precipitate Hg, Cd Pb. Zn quantitatively isolated pH 1,5-2 by adding Na2S. Mn can be precipitated close 7. may replaced oxalic acid. around 0, whereas recovered > 4. Acidity control is a critical parameter. Na2SO4 carbon are end products.