A5038271883- Groundwater and Isotope Geochemistry
- Water Quality and Pollution Assessment
- Geochemistry and Geologic Mapping
- Meat and Animal Product Quality
- Spectroscopy and Chemometric Analyses
- Biodiesel Production and Applications
- Groundwater and Watershed Analysis
National Water Agency
2021
Universidade Federal de Pernambuco
2010
This paper evaluates analytical methods based on near infrared (NIR) and middle (MIR) spectroscopy multivariate calibration to monitor the stability of biodiesel. There was a focus three parameters: oxidative index, acid number water content. Ethylic methylic biodiesel from different feedstocks were used in experiments accelerated aging, order take into account wide variety oilseeds available Brazil. Partial least squares (PLS) multiple linear regression (MLR) models developed. Different...
A hydrochemical study was conducted on the Quaternary Aquifer, in Recife, Brazil. Groundwater samples were collected March–April 2015, at beginning of rainy season. Conventional graphics, ionic ratios, saturation indices, GIS mapping, and geostatistical multivariate statistical analyses used to water quality assessment characterize main processes controlling groundwater’s chemistry. Q-mode hierarchical cluster analysis separated into three clusters five sub-clusters according their...