Produção Nacional
Avaliação da qualidade das águas e dos sedimentos do rio São Lourenço-SP
2014; Linguagem: Inglês
10.15343/0104-7809.20143801075085
ISSN1980-3990
AutoresAngélica Megda da Silva, Denis Moledo de Souza Abessa, Paulo Augusto Zantune Pamplin, Maria Beatriz Camino Bohrer,
Tópico(s)Heavy metals in environment
ResumoSao Lourenco River (SLR) is part one of the Ribeira de Iguape River basin, and provides water to supply the cities of SaoLourenco da Serra and Juquitiba. The SLR also receives large amounts of pollution from these municipalities. In thiscontext, this study aimed to evaluate the impacts of the release of residues from water treatment (WTP) and wastewatertreatment plants (WWTP) on the sediments of the SLR. Six sampling stations were established along the river (includingupstream and downstream of both WTP and WWTP), and 6 sampling campaigns for sediments were conducted. In such 6surveys sediments were collected for ecotoxicological tests, in 2 surveys, material was also collected for benthic communityevaluation (March and September 2006), and in one survey samples for chemistry were taken (September 2006). Sevencampaigns were conducted for water sampling aiming to ecotoxicological tests. The metal levels were low for all samples.Ecotoxicological tests with sediments showed acute toxicity in samples collected downstream to both WTP and WWTP inNovember 2005 and March 2006, and chronic effects for all samples in November 2005 and September 2006. All samplesfrom SLS 008 were toxic. Results showed negative responses in the benthic community, with low richness and diversity.The water samples collected downstream to WTP presented acute ecotoxicity in 2004 and 2006. No chronic toxicity wasobserved for waters. The results indicate that SLR is influenced by other anthropic activities, beyond to WTP and WWTPdischarges, and that sediments are more affected in this ecosystem.
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