Water And Sediments
Mostrando 1-12 de 428 artigos, teses e dissertações.
-
1. Evaluation of sediment contamination by urban sewage in a stretch of Capibaribe River, Pernambuco, Brazil
Anthropic activities are responsible for the increase in environmental contamination, especially in aquatic systems, demanding studies to assess and monitor contamination levels in different water bodies. We have done a chemical characterization of eleven sediments in order to evaluate the level of contamination by domestic sewage from the Capibaribe River,
Química Nova. Publicado em: 2022
-
2. Metal Distribution in the Environmental Compartments of Manguaba Lagoon (Alagoas State, Brazil)
The metal concentrations in water, sediments and mollusks (Tagelus plebeius) of the Manguaba Lagoon and the influence of humic substances from water and sediments in the distribution of these metals were investigated in this work. The mean metal concentrations in water were: Mg (89.0 ± 0.11), Ca (32.0 ± 0.10), Fe (0.97 ± 0.02), Mn (0.52 ± 0.01), Zn (0.33
J. Braz. Chem. Soc.. Publicado em: 2021-03
-
3. Distribution of major and trace elements in bottom sediments of the Taquari River Basin, Caldas municipality (Brazil)
Resumo A Bacia do Rio Taquari, localizada no Complexo Alcalino de Poços de Caldas, na porção sul de Minas Gerais, está situada em uma antiga caldeira vulcânica. Devido às suas características químicas e radiológicas, é uma área de interesse econômico e mineral, além de abrigar diversos sistemas de flora e fauna. Nos seus arredores existem áreas
Rev. Ambient. Água. Publicado em: 03/10/2019
-
4. Distribution of Metals in the Waters and Sediments of Rivers in Central Amazon Region, Brazil
Seasonal concentrations of total, particulate and dissolved Al, Cu, Cd, Cr, Fe, Pb and Ni were analyzed in surface water and total metals in sediment samples from black and whitewater rivers within the Itacoatiara City, Central Amazon. Metals concentrations in water and sediment samples demonstrated that even though urbanization and agricultural practices ar
J. Braz. Chem. Soc.. Publicado em: 16/09/2019
-
5. Phosphorus dynamics in a highly polluted urban drainage channel-shallow reservoir system in the Brazilian semiarid
Abstract: This paper investigates phosphorus dynamics in a highly polluted system composed of a drainage channel followed by a shallow reservoir in the city of Fortaleza, Brazilian semiarid. During the dry season, significant non-point source loads of total phosphorus originated from residences unconnected to sewers were identified along the channel, resulti
An. Acad. Bras. Ciênc.. Publicado em: 19/08/2019
-
6. Dredging impact on trace metal behavior in a polluted estuary: a discussion about sampling design
ABSTRACT Studies involving coastal sediment resuspension have shown that trace metals could be released to the water column due to changes in physical-chemical conditions. Therefore, if environmental agencies adopt screening protocols with insufficient evaluations of contaminant mobilization risks for a given area, the prediction of environmental impacts cau
Braz. j. oceanogr.. Publicado em: 22/07/2019
-
7. Impact of pig slurry application on soil and water losses: Comparison with a historical series
RESUMO A erosão hídrica no solo é influenciada por diversos fatores, incluindo chuva, relevo, cobertura, e manejo e práticas conservacionistas. Ainda, a erosão é afetada pelo dejeto suíno (DS) aplicado ao solo como fertilizante. Os objetivos desta pesquisa foram i): avaliar a erosão em Cambissolo Húmico, após aplicação de DS sob diferentes tratam
Rev. bras. eng. agríc. ambient.. Publicado em: 01/07/2019
-
8. First record of Acanthocephala parasites eggs in coprolites preliminary assigned to Crocodyliformes from the Adamantina Formation (Bauru Group, Upper Cretaceous), São Paulo, Brazil
Abstract Abstract: This study presents the oldest record of Acanthocephala parasite eggs in coprolites preliminary assigned to Crocodyliformes, recovered in the region of Santo Anastácio Municipality, Southwestern São Paulo State. For this, a paleoparasitological investigation was carried out on 53 mineralized coprolites (complete or fragmented), with roun
An. Acad. Bras. Ciênc.. Publicado em: 06/05/2019
-
9. Influence of environmental factors on the bathymetric distribution of the flecked box crab Hepatus pudibundus (Herbst, 1785) (Crustacea: Aethroidea) in the Southeastern Brazilian coast
Resumo: Este estudo avaliou as relações dos fatores ambientais e a distribuição espaço-temporal de H. pudibundus, com a hipótese de ocupação diferencial em uma região do litoral sudeste do Brasil. As amostragens ocorreram mensalmente no período de janeiro a dezembro de 2000, ao longo de nove transectos de 2 a 40 m de profundidade, na região de Uba
Biota Neotrop.. Publicado em: 14/01/2019
-
10. MODELING OF PHOSPHORUS LOSSES BY WATER EROSION
ABSTRACT Phosphorus losses in runoff water and eroded sediment may increase the risk of eutrophication. Erosion prediction models can be used to assess and quantify nutrient losses and transport in different soil management scenarios. This study aimed to assess the performance of models to estimate the losses of available phosphorus in eroded sediments and a
Eng. Agríc.. Publicado em: 2018-01
-
11. Phosphorus Forms in Sediments as Indicators of Anthropic Pressures in an Agricultural Catchment in Southern Brazil
ABSTRACT Phosphorus (P) fractionation is a suitable procedure to ascertain P lability in sediments and is able to distinguish sources of P under different soil management practices in a catchment. Brazil is the second largest producer and the largest exporter of tobacco in the world. Inadequate management of cultivated areas exposes the soil to erosion proce
Rev. Bras. Ciênc. Solo. Publicado em: 04/12/2017
-
12. Potentially mobile of heavy metals on the surface sediments in tropical hyper-saline and positive estuaries
ABSTRACT Estuarine sediments represent important pools of trace metals, released from both anthropogenic and natural sources. Fluctuations in the water column physicochemical conditions, on the other hand, may transfer metals from solid to liquid compartment and resulting in contamination of the surrounding environment. The present research was carried out t
An. Acad. Bras. Ciênc.. Publicado em: 2017-12