Fatores que governam a especiação do cobre em ambientes aquáticos urbanos: evidências da contribuição de sulfetos solúveis

Scheffer, Elizabeth W. O.; Sodré, Fernando Fabriz; Grassi, Marco Tadeu

doi:10.1590/s0100-40422007000200018

Cited by 11 publications

(11 citation statements)

References 41 publications

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“…The Barigui River, Carvalho et al [69] (2013) presented total alkalinity values ranging from 156.8 to 212.8 mg x L -1 CaCO 3 . In the study by Scheffer [70] found 133 mg x L -1 CaCO 3 for the same environment. It should be noted that Fritzsons [71] states that the alkalinity in most Brazilian rivers is between 30 and 500 mg x L -1 CaCO 3 .…”

Section: Determination Of Total Alkalinity Nutrients and Chlorophyllmentioning

confidence: 88%

Risks Associated of the Waters from Hydric Systems Urban`s. The case of the rio Barigui, south of Brazil

Silva¹,

Makara²,

Munaro³

et al. 2017

Rev. Chim.

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The quantification of a chemical species isolated in natural waters does not allow the characterization of it as an environmental stressor. Therefore, it is necessary to associate different lines of research that allows the evaluation of risk on the water system. In this perspective, this study carries out approaches based on distinct research lines, allowing physical and chemical quantification in situ, determination of nutrient concentrations, chlorophyll-α, total alkalinity and metallic species (Cu, Ni, Fe, Cr, Zn and Pb). In addition, the dissolved organic matter was evaluated by means of spectrophotometric techniques and testing of acute toxicity with the organism Artemia sp. and Daphnia magna in water samples from the Barigüi River, southern Brazil. The results point to the existence of degradation processes and the input of organic matter that are affecting the dynamics of the species, influencing their chemical availability and toxicity in the water system.

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Section: Determination Of Total Alkalinity Nutrients and Chlorophyllmentioning

confidence: 88%

Risks Associated of the Waters from Hydric Systems Urban`s. The case of the rio Barigui, south of Brazil

Silva¹,

Makara²,

Munaro³

et al. 2017

Rev. Chim.

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“…Thus, in aquatic systems with acidic pH, this metal is usually dissolved in water (Milesi, Biasi, Restello, & Hepp, 2008). However, at a pH of about 8, Cu is mostly precipitated in the form of copper hydroxide or in stable complexes with sulfides, which exert oxidative effects and dissociation (Scheffer, Sodré, & Grassi, 2007).…”

Section: Discussionmentioning

confidence: 99%

<b>Cd, Cu, and Mn from Uruguay River Basin in Uruguaiana, RS, Brazil, and their toxicological potential for human leukocyte

Costa

Rocha

Querol

et al. 2016

Acta Sci. Biol. Sci.

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This study assessed the limnology from the Medium Uruguay River Basin in Uruguaiana, Brazil, with a focus on the concentration of heavy metals (Cd, Cu, and Mn), to assess the toxicological potential (cytotoxicity and genotoxicity) for humans using as biological matrix of study human leukocyte cells. The conductivity, resistivity, and dissolved O 2 levels exceeded the limits recommended by the National Environmental Council (Conselho Nacional do Meio Ambiente-CONAMA). The percentage of non-viable human leukocyte cells exposed to water samples was approximately 20% higher than that of the negative control (<3%), but similar to the positive control. The DNA damage index was high for all heavy metal concentrations assayed when compared to the negative control 12±2.96, p < 0.0001, with a range of 155.66±23.89 to 194.33±23.23, but similar to the positive control (210.62±27.48). Moreover, the leukocyte degeneration index was higher in all samples containing heavy metals than in the negative control (4%), which demonstrates to be due the presence of Cu (11.8-12.5%), Cd (13-15.6%), and Mn (15.6-22.5%). Taken together, our results show that the quality from water samples analyzed is below than recommended by CONAMA and offers risk of contamination by heavy metals for the general population.

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“…Table 2. Statistical results of the concentrations of metals in the water samples collected from the drainage basin studied Studies on the adsorption of copper to organic matter in drainage basins have demonstrated that the pH value and amount of particulate organic matter alter the distribution of copper in the water column (Scheffer et al, 2007). The mean copper concentration in the water of the drainage basin studied was higher than the median value, indicating asymmetrical distribution.…”

Section: Environmental Management and Sustainable Developmentmentioning

confidence: 94%

Environmental Characteristics and Water Quality of a Drainage Basin Impacted by Human Activities

Oliveira

Becegato

Barcarolli

et al. 2017

EMSD

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The aim of the present study was to determine the environmental characteristics and water quality of a drainage basin impacted by human activities in order to obtain quantitative information for helping the development of environmental management politics of soils, lakes, rivers and water resources. Physicochemical properties and concentrations of metals were determined in different water samples. Dissolved oxygen, pH, turbidity, color, ammonia, phosphorus, phenol, copper, silver, lead, cadmium and iron differed from levels considered acceptable by international regulations, indicating potential environmental pollution due to land occupation and the improper disposal of domestic, industrial and agricultural waste. The leaching of pollutants from the soil to bodies of water was also found. Total dissolved solids, salinity, suspended solids, nitrate, nitrite and zinc levels were lower than the limits imposed by international regulations, but have been increasing over time. Urbanization, industrialization and agricultural processes in drainage basins significantly affect the natural characteristics of the environment, leading to an increase in the concentrations of pollutants and a reduction in the quality of water, plants and soils. As pollutants in drainage basins generally enter into soils, rivers, lakes and ocean, it is necessary to obtain quantitative information about the human impacts in the water quality for developing environmental management politics aiming to preserve the water resources.

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Fatores que governam a especiação do cobre em ambientes aquáticos urbanos: evidências da contribuição de sulfetos solúveis

Cited by 11 publications

References 41 publications

Risks Associated of the Waters from Hydric Systems Urban`s. The case of the rio Barigui, south of Brazil

Risks Associated of the Waters from Hydric Systems Urban`s. The case of the rio Barigui, south of Brazil

<b>Cd, Cu, and Mn from Uruguay River Basin in Uruguaiana, RS, Brazil, and their toxicological potential for human leukocyte

Environmental Characteristics and Water Quality of a Drainage Basin Impacted by Human Activities

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