The State of Roraima (Amazon - Brazil) is considered well-preserved from an environmental point of view, sheltering a great variety of rivers and forest and “cerrado” streams, with white (muddy), black and clear waters. From the identification of the planktonic community of diato...
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Research Article10.9734/ajfar/2023/v21i6558
This research aimed to correlate the sedimentary transport with the diagenetic processes in the coastal zone and Amazon Continental Shelf (ACS). Physical and physical-chemical parameters, trace element contents (Cr, Pb, Ni, Zn and Hg), and O2, CO2 and iron flux were determined in...
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Research Article10.9734/jgeesi/2019/v20i430113
Aims and Place: The Doce River is one of the largest rivers of southeastern Brazil, and has been target of strong environmental impact in recent decades due to mining and farming activities. Influenced by lithological factors and human disturbance, the Doce River has brought chan...
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Research Article10.9734/BJECC/2016/25454
Aims and Place: The increase in greenhouse gas emissions in recent decades, especially CO2, is attributed to the increasing burning of fossil fuels and the expansion of agricultural activities. Therefore, more information should be garnered about the mechanisms that control car...
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Research Article10.9734/BJECC/2015/18144
This research makes a brief review of the limnology of lakes in wetlands in the Western Amazon, associating physical-chemical and morphological aspects to the biodiversity of black-waters lakes and whitewaters lakes. Lakes in these areas can show different patterns of vertical st...
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Research Article10.9734/jalsi/2022/v25i530303
Trace elements or trace metals are of great interest in environmental studies due to their toxic and cumulative properties in the biological and sedimentary compartments. The discharge area of the Amazon River mouth receives an immense volume of suspended material with adsorbed t...
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Research Article10.9734/ijecc/2018/v8i127131
Aims: The objective of this research was to evaluate the water pollution levels in the Aurá River basin and to provide subsidies to public decisions for the protection, preservation and conservation of basins for the supply the Metropolitan Region of Belém (MRB). Study Area and M...
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Research Article10.9734/ACRI/2016/28249
Place and Aims: Total concentrations of Hg and geochemical analysis of sediments from the Amazon Continental Shelf (47º52'W-4º19'N, 51º04'W-2º16'S) were determined in 25 sampling sites, during the months of lowest flow of the Amazon River. The aim of this study was to determine t...
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Research Article10.9734/ACSJ/2016/26625
The objective of this research was to carry out a survey of the diatomaceous fluorula (Bacillariophyta) in the Branco River basin and its sub-basins in the State of Roraima (Amazonia, Brazil). The taxa were identified and presented on plates with photomicroscopy. The collections...
This study evaluated the quality of groundwater in the municipality of Abaetetuba (PA, Brazil 1°43'46'' S e 48°52'27'' W) based on the hydrogeological characterization and degree of vulnerability of the aquifer system. The municipality of Abaetetuba is practically all supplied by...
The objectives of this research were to evaluate the quality and to determine the degree of vulnerability and accessibility of groundwater destined to the public supply of the municipality of Abaetetuba (State of Pará - Brazil), allowing to establish an environmental management p...
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Research Article10.9734/JALSI/2018/41619
Aims and Place: The variable transparency, temperature, dissolved oxygen, conductivity, pH, total suspended solids (TSS), turbidity and ion balance (Na+, K+, Ca2+, Mg2+, Cl-, HCO3- + CO32- and SO42-) were measured in surface waters of the Amazon River and Mamiá Lake during the hy...
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Research Article10.9734/BJECC/2017/27897
The objective of this study was to investigate the variation of levels of organic pollution and metal contamination (Al, Ca, Cd, Cu, Cr, Fe, K, Mg, Mn, Na, Pb and Zn) in the sediments of the drainage channels from Una basin in 2002 and 2015, after implementation of the Una Basin...
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Research Article10.9734/JALSI/2018/43188