Impactos do lançamento de efluentes na qualidade da água do riacho Mussuré

AUTOR(ES)

Raphael Abrahão

DATA DE PUBLICAÇÃO

2006

RESUMO

The main purpose of this study was the investigation of impacts of the disposal of industrial and domestic effluents on the quality of the water of a hydric body, considering the probable repercussions on the environment and on the health of the user population. The delimited study area was the Mussuré stream basin, which is located in the Gramame river basin, in the state of Paraíba. Along its course, the Mussuré stream receives discharges of domestic sewers, solid residues and the most diverse industrial pollutant loads, since it flows through the Industrial District of João Pessoa. The work methodology consisted of analyzing water quality data, as well as observing in loco the areas problems and collecting information from the agencies responsible for environmental causes. The data, regarding physical, chemical, bacteriological and heavy metals concentration parameters, was analyzed spatially, along five sampling stations, and temporally. Multivariate analysis and two water quality indexes (IQAOBJ and IQABA) were also used to study the data. Several alterations were verified in the water quality of the Mussuré stream, along its entire course. The DO contents were considerably below the limit established by CONAMA Resolution 357/05 for the class 3 (4,0 mg/L), in all monitored stations. The station situated approximately at the halfway mark of the stream course presented the highest BOD, color and turbidity values, and the lowest water quality referenced to the two mentioned indexes, fact due to the discharge of industrial effluents upstream from this station. In general, the concentrations of analyzed metals were above the limits established by CONAMA Resolution 357/05. After analyzing the results, it was concluded that the Mussuré stream presents a high degradation degree and its water represents a substantial risk for the health of the user population

ASSUNTO(S)

water quality index hidrogeografia industrial effluents Índices de qualidade da água hydrographical basin efluentes industriais bacia hidrográfica

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