Publications by authors named "Daniel Santos Mulholland"
Linking multivariate statistical methods and water quality indices to evaluate the natural and anthropogenic geochemical processes controlling the water quality of a tropical watershed.
Débora Francisca Morais da Silva Letícia Mariana Lopes da Silva Jeremie Garnier Daniel Ferreira Araújo Daniel Santos Mulholland
Environ Monit Assess
September 2023
The improvement of water management requires monitoring techniques that accurately evaluate water quality status and detect the effects of land use changes on water chemistry. This study aimed to evaluate how multivariate statistical methods and water quality indices can be applied together to evaluate the processes controlling water chemical composition and the overall water quality status of a tropical watershed. Thirty-four water samples were collected in the Formoso River basin, located on the border of the Amazon Forest.
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- * The study used advanced sampling and geochemistry techniques to analyze metal contamination, revealing low dissolved metal levels but high concentrations in tailings.
- * It found that while the tailings had a notable impact on sediment, other local human activities also played a role in the river's ongoing contamination issues.
Article Synopsis
- The study examines the impact of a dam collapse in Brazil on metal and metalloid levels in the Doce River estuary, using advanced spectroscopic and isotopic techniques.
- Results indicate an increase in particulate and dissolved concentrations of hazardous metals like Fe, Pb, Cd, and As, exceeding safety guidelines.
- The findings suggest local communities face potential health risks, particularly from chromium exposure, and highlight changes in metal partitioning due to river-ocean interactions.