Metals in the sediments of Jauá Lake (Camaçari, Bahia, Brazil) following an episode of industrial contamination

Silva, E.M da; Navarro, Macarena; Barros, A.F; Mota, M.F.V; Chastinet, Carla B.A.

doi:10.1016/s1463-4988(00)00043-9

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…Heavy metals and metalloids can be toxic at high concentrations and can affect aquatic organisms, as well as adversely affect human health (Nor, 1987;Silva et al, 2000). These elements usually have dynamic distribution and behaviour in lagoon sediments and their sources can be natural or anthropogenic (Kouassi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Characterization and evolution of the sediments of a Mediterranean coastal lagoon located next to a former mining area

García

Muñoz-Vera

2015

Marine Pollution Bulletin

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Coastal lagoons are ecosystems that are relatively enclosed water bodies under the influence of both the terrestrial and the marine environment, being vulnerable to human impacts. Human activities, such as mining extraction, are significant anthropogenic coastal stressors that can negatively affect ecosystems and communities. In light of the above, the objective of this research is to examine the influence of metal mining activities on the composition of sediments of a Mediterranean coastal lagoon, named Mar Menor. This paper presents a comprehensive characterization for grain size, mineralogy, geochemistry and organic matter of sediments of this coastal lagoon, investigating their variation along space and time. Sedimentation dynamics are ruling clearly the grain size predominant in each area of the Mar Menor coastal lagoon, determining the existence of entrainment, transport and sedimentation areas. For minerals, elements and organic matter, sedimentation dynamics are also determining their distribution.

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Section: Introductionmentioning

confidence: 99%

Characterization and evolution of the sediments of a Mediterranean coastal lagoon located next to a former mining area

García

Muñoz-Vera

2015

Marine Pollution Bulletin

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“…Some elements are necessary micronutrients for living organisms although many of them (e.g. Pb, Zn, and Cu) are toxic over a certain concentration and can adversely affect aquatic organisms and human health (da Silva et al 2000). In the last few decades, many geochemical studies have been made of coastal and lake sediments to determine the extent of heavy metal contamination (Rosales-Hoz et al 2000;Marvin et al 2004;Nguyen et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Present environment of Dam Lake Sambe, southwestern Japan: a geochemical study of bottom sediments

et al. 2009

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Geochemical analyses of lakebed and core sediments from Lake Sambe on the outskirts of Oda City in Shimane prefecture in southwestern Japan were carried out in order to assess the water quality and the concentration and distribution patterns of sixteen elements. The lake water showed a stratified condition with respect to dissolved O 2 , and As, Fe, and Mn concentrations in the bottom layers which increased in the summer. The chemical composition of the sediments, as measured by X-ray fluorescence, included major and trace elements (P, Ca, Sc, Ti, V, Cr, Fe, Ni, Cu, Zn, As, Sr, Zr, Pb, and Th), and total sulfur (TS). Elevated values of As, Zn, V, Fe, P, and TS were present in several layers of the upper cores (from 0 to 5 cm) and other surface sediments. Increases in the abundances of these metals in lake sediments are probably related to the reducing condition of the sediments, finegrained organic rich sediments, and post-depositional diagenetic remobilization. Moreover, correlations between the concentrations of trace metals and iron in the sediments suggest their adsorption onto Fe (oxy)hydroxides, whereas correlations with sulfur indicate that they were precipitated as Fe-sulfides. The average abundances of As, Pb, Zn, and

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In situ and laboratory bioassays using Poecilia reticulata Peters, 1859 in the biomonitoring of an acidic lake at Camaçari, BA, Brazil

et al. 2006

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The suitability and viability of acute in situ bioassays were investigated in the biomonitoring program of an acidic lake contaminated with sulphur residues. Responses of organisms observed in laboratory and in situ bioassays were also assessed to determine whether or not they were similar and comparable, regarding accuracy and precision. Newborn Poecilia reticulata were employed as test organisms and exposed to the same water samples under in situ and laboratory conditions. Mortality/immobility was the endpoint assessed and dead/immobile organisms were counted at various time intervals during exposure. The mean calculated LT50 values and 95% confidence intervals were 1.61 (1.36-1.87) h in the laboratory bioassays and 0.72 (0.55-0.89) h in the in situ bioassays. Statistical comparison of these values revealed a significant difference (p<0.05). In situ bioassays were more accurate than those carried out in the laboratory, demonstrating higher sensitivity and better reproduction of what occurs in nature, while laboratory bioassays were more precise.

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Metals in the sediments of Jauá Lake (Camaçari, Bahia, Brazil) following an episode of industrial contamination

Cited by 10 publications

References 2 publications

Characterization and evolution of the sediments of a Mediterranean coastal lagoon located next to a former mining area

Characterization and evolution of the sediments of a Mediterranean coastal lagoon located next to a former mining area

Present environment of Dam Lake Sambe, southwestern Japan: a geochemical study of bottom sediments

In situ and laboratory bioassays using Poecilia reticulata Peters, 1859 in the biomonitoring of an acidic lake at Camaçari, BA, Brazil

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