Water quality assessment in piracicamirim creek upstream and downstream a sugar and ethanol industry through toxicity tests with cladocerans

• Main Authors: Rafael Grossi Botelho, Luís Machado Neto, Ricardo Alves de Olinda, Carlos Tadeu Dias, Valdemar Luiz Tornisielo
• Format: Article
• Language: English
• Published: Instituto de Tecnologia do Paraná (Tecpar) 2012-08-01
• Series: Brazilian Archives of Biology and Technology
• Subjects: Daphnia magna; Ceriodaphnia dubia; Ceriodaphnia silvestrii; water quality
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000400020

An environmental impact study was conducted to determine the Piracicamirim's creek water quality in order to assess the influence of effluents from a sugar industry in this water body. For this, toxicity tests were performed with a water sample upstream and downstream the industry using the microcrustaceans Daphnia magna, Ceriodaphnia dubia and Ceriodaphnia silvestrii as test organisms, as well as physical and chemical analysis of water. Results showed that physical and chemical parameters did not change during the sampling period, except for the dissolved oxygen. No toxicity was observed for D. magna and reproduction of C. dubia and C. silvestrii in both sampling points. Thus, the industry was not negatively impacting the quality of this water body.