Water quality in Una River Basin – Pernambuco

This study aimed to evaluate the water quality of the lower portion of Una River Basin, Pernambuco, by means of analysis of physical, chemical and microbiological parameters. The monitoring was conducted among October 2013 and March 2014. Sampling locations were in the cities of Catende, Palmares and Água Preta, selecting three collection points in each district. Parameters analyzed: temperature, electric conductivity, dissolved oxygen, biochemical oxygen demand, turbidity, potassium, pH, total phosphorus, thermotolerant coliforms, and Escherichia Coli. The results showed the water quality in the Basin Una River is outside of CONAMA standars Resolution 357/2005 for fresh water Class II parameters: dissolved oxygen, pH, phosphorus, thermotolerant coliforms and Escherichia Coli. Potassium concentration shows the discharge of effluents from the processing of sugar cane in the hydrous body did not affect the quality of the water. The main contamination source of water was the release of domestic sewage.

Geoprocessing applied to physiographic characterization of the Lontras River Basin - Paraná, Brazil | Geoprocessamento aplicado à caracterização fisiográfica da Bacia do Rio Lontras - Paraná, Brasil

The morphometric characterization is considered an important tool in the management of river basins, and it provides relevant information to decision making by managers who are associated with the geographic divisions. The use of Geographic Information Systems (GIS) and remote sensing tools, widespread in monitoring and spatial analysis, is characterized as a facilitator component in the search for characterization and identification of factors which influence the geomorphometric parameters of the territory. The current spread of geoprocessing and GIS in general, culminate in a wide availability of storage systems and computer programs for data processing and conversion. Based on the above, this study aimed to morphometric and rainfall characterization of the Salto do Lontra watershed, which covers the municipalities of Salto do Lontra and Nova Esperança do Sudoeste located in West Region of Paraná State, Brazil, using the software Qgis 2.14. In this regard, the Digital Elevation Model (DEM) was used with a spatial resolution of thirty meters, provided by the National Institute for Space Research and historical precipitation data provided by the Paraná Water Institute. Through the MDE an altimetric data correction was performed obtaining a Hydrologically Consistent Digital Elevation Model (HCDEM), in which were obtained by manipulating data in a GIS environment, physical variables to determine the morphometric parameters. The results demonstrated that the Salto do Lontra watershed has a drainage area of 177.54 km² and a perimeter of 99.29 km. The compactness coefficient obtained was 2.09, the form factor 0.19 and circularity index 0.23, indicating that the basin has elongated shape and low propensity to flooding. The drainage density was 0.85 km.(km²)-1, time of concentration 535.59 min. and sinuosity index of 40.57%. In addition, the data obtained in this study indicated that the average annual precipitation was 1896.85 mm, watching orographic effect on its distribution

Tilapia scales : characterization and study of Cu(II) removal by ion exchange with Ca(II)

A biosorbent material based on tilapia scales for the removal of Cu(II) ions was investigated. Modifications in the biosorbent caused by retention of Cu(II) and by the pH effect were evaluated separately in order to comprehend how the removal process occurs. For that, a physico-chemical characterization of the scales was performed before and after the Cu(II) removal. The results obtained from the characterization and biosorption tests led to the conclusion that the Ca–Cu ions exchange was responsible for purifying the solution. Furthermore, the tilapia scales were efficient, removing 95% of Cu(II) with 1 g of adsorbent (surface area ≈ 3 m2)551186198CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESNão temNão temThe authors gratefully acknowledge CAPES (Commission for the Improvement of Higher Education Personnel), CNPq (National Council for Scientific and Technological Development), UNIOESTE (West Paraná State University), and the Araucaria Foundatio

Water quality in Una River Basin – Pernambuco

This study aimed to evaluate the water quality of the lower portion of Una River Basin, Pernambuco, by means of analysis of physical, chemical and microbiological parameters. The monitoring was conducted among October 2013 and March 2014. Sampling locations were in the cities of Catende, Palmares and Água Preta, selecting three collection points in each district. Parameters analyzed: temperature, electric conductivity, dissolved oxygen, biochemical oxygen demand, turbidity, potassium, pH, total phosphorus, thermotolerant coliforms, and Escherichia Coli. The results showed the water quality in the Basin Una River is outside of CONAMA standars Resolution 357/2005 for fresh water Class II parameters: dissolved oxygen, pH, phosphorus, thermotolerant coliforms and Escherichia Coli. Potassium concentration shows the discharge of effluents from the processing of sugar cane in the hydrous body did not affect the quality of the water. The main contamination source of water was the release of domestic sewage