Seasonal variations, metal distribution and water quality in the Todos os Santos River, Southeastern Brazil: a multivariate analysis

Abstract

In aquatic habitats, metal contamination from natural and anthropogenic sources continues to pose a concern for human and environmental health. Thus, it is important to complete monitoring studies to assess patterns and the extent of metal contamination in these ecosystems. The purpose of this work was to determine the concentrations of 31 chemical elements and water quality parameters of the Todos os Santos River located in the Mucuri Valley, Minas Gerais, Brazil. A multivariate statistical analysis was used to determine any seasonal and spatial patterns from the data. Results demonstrated that metals including Al, Fe, and Ni exceeded Brazilian and international guidelines nutrients as P also exceed water quality standards. Principal components analysis indicated distinct geographical and seasonal patterns for multiple elements with hierarchical cluster analysis confirming the observed spatial patterns of contamination in the Todos os Santos River.

Indicador da qualidade da água através de análise fatorial: um estudo de caso na zona portuária de Belém, Amazônia, Brasil

“…principalmente esmectita e ilita (SANTOS et al, 2012;PEREIRA et al, 2018), oriundo das margens da baia e ilhas adjacentes (OLIVEIRA et al, 2015). Outra fonte pode estar relacionada a descarga de sedimentos trazidos pelos diversos rios que compõem a baia, como o rio Guamá, Mojú e Acará, que podem conduzir também minerais aluminosos (OLIVEIRA et al, 2015;SINGH et al, 2019).…”

Assessment of heavy metal contamination in the water of Dayet Er-Roumi Lake (Morocco)

“…While Mn does not show any significant correlation with other heavy metals (Table 2), which indicates that the distributions of the metals above were not controlled by the same factor. The strong correlations between some heavy metals show the same input sources and a similar geochemical behavior (Lu et al, 2010;Saeedi et al, 2012;Pereira et al, 2017). Therefore, the associations of metals indicate that the water of Dayet Er-Roumi has assimilated various contaminants from chemical fertilizers, pesticides, domestic sewage, and agricultural runoff areas.…”

Temporal Variation of Cadmium and Lead in Nile Water, Assiut City, Egypt

“…Because of the excessive importance of studying the concentration of heavy metals in water, many countries have undertaken studies to evaluate their concentrations in order to manage the treatment from their increase in the permissible rates. They use different methods like mass spectroscopy, atomic absorption spectrophotometry and inductive couple plasma atomic emission spectroscopy [19][20][21][22][23][24][25][26][27]. Data in Table .5 were collected to compare the quality of their rivers and Nile River.…”