A5044639348- High voltage insulation and dielectric phenomena
- Power Transformer Diagnostics and Insulation
- Corrosion Behavior and Inhibition
- Heavy metals in environment
- Agricultural and Food Sciences
- Water Quality and Pollution Assessment
- Underwater Vehicles and Communication Systems
- Water Quality Monitoring Technologies
- Advanced MRI Techniques and Applications
- Polymer Nanocomposites and Properties
- Geochemistry and Geologic Mapping
- Analytical chemistry methods development
- NMR spectroscopy and applications
- Environmental Toxicology and Ecotoxicology
Institutos Lactec
2019
Universidade Federal do Paraná
2019
Universidade Tecnológica Federal do Paraná
2015-2016
ABSTRACT Models for assessing sediment quality describe the occurrence of a continuous matter and energy exchange process at sediment–water interface, displacement nutrients metals from sediments to water column affecting its quality. Although these models are highly used studying reservoirs lakes, there is gap between them regarding assessment rivers in heavily urbanized areas without access basic sanitation, where high loads untreated effluents domestic industrial sources arrive. This work...
Sediments are active environmental compartments capable of interchanging the chemical species with water column, degrading their quality and influencing toxicity matrix. The average concentrations sediment-associated metallic have been used to evaluate extent contamination. approaches progressed considerably over last few decades different instrumental techniques employed in quali-quantification metal compounds associated sediments. This study aimed accuracy technique Energy Dispersive X-Ray...
The quantification of a chemical species isolated in natural waters does not allow the characterization it as an environmental stressor. Therefore, is necessary to associate different lines research that allows evaluation risk on water system. In this perspective, study carries out approaches based distinct lines, allowing physical and situ, determination nutrient concentrations, chlorophyll-a, total alkalinity metallic (Cu, Ni, Fe, Cr, Zn Pb). addition, dissolved organic matter was...
Mineral insulating oil (MIO) and natural ester (NEI) are used in power transformers as an fluid, while elastomeric seals usually composed of nitrile rubber (NBR). The proprieties these can change contact with oil. Variation sealant properties is undesirable transformers. In this work, the variation some elastomer was evaluated before after accelerated aging MIO NEI. developed compositions showed stress strain at break test. It also appeared that penetrated samples dioctylphthalate (DOP)...
RESUMO Os transformadores de potência são equipamentos essenciais nos processos geração e distribuição energia elétrica, são, normalmente, isolados com papel fluidos isolantes. isolantes têm dupla função: isolamento elétrico do sistema refrigeração por troca térmica. A vedação adequada desse equipamento é fundamental para que não ocorra vazamento fluido isolante, pode causar redução tempo vida útil transformador, bem como problemas ambientais. Neste artigo apresentados resultados obtidos...