Evaluation of genotoxicity and toxicity of water and sediment samples from a Brazilian stream influenced by tannery industries

This paper reports results of genotoxicity and toxicity studies of water and sediment samples collected from the Estância Velha stream of southern Brazil, a stream transporting both domestic sewage and effluents from regional factories working in the leather industry. Three sites were selected: in t...

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Bibliographic Details
Published in:	Chemosphere (Oxford) Vol. 67; no. 6; pp. 1211 - 1217
Main Authors:	Júnior, Horst Mitteregger, Silva, Juliana da, Arenzon, Alexandre, Portela, Carina Saraiva, Ferreira, Isabel Cristina Fernandes de Sá, Henriques, João Antônio Pêgas
Format:	Journal Article
Language:	English
Published:	Oxford Elsevier Ltd 01-04-2007 Elsevier
Subjects:	Allium cepa Allium test Amphipoda - drug effects Animal and plant ecology Animal, plant and microbial ecology Animals Applied ecology Biological and medical sciences Brazil Ceriodaphnia dubia Crustacea - drug effects Daphnia - drug effects Daphnia magna ecotoxicology Ecotoxicology, biological effects of pollution Environmental monitoring Environmental Monitoring - methods Fresh water ecosystems Freshwater Fundamental and applied biological sciences. Psychology General aspects Genotoxicity Geologic Sediments - chemistry Hyalella azteca Leather Mutagenicity Tests Onions - drug effects Rivers - chemistry Seasons sediment contamination sediments streams surface water Synecology tannery effluents Tanning Toxicity toxicity testing Toxicity Tests Waste Disposal, Fluid Water Pollutants, Chemical - toxicity water pollution Brazil Leather Allium test Environmental monitoring Toxicity Genotoxicity Monocotyledones Ecotoxicology Sediments Tannery Allium Freshwater environment Aquatic environment Liliaceae Environment impact Leather industry Angiospermae Surface water Spermatophyta Stream
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Summary:	This paper reports results of genotoxicity and toxicity studies of water and sediment samples collected from the Estância Velha stream of southern Brazil, a stream transporting both domestic sewage and effluents from regional factories working in the leather industry. Three sites were selected: in the stream headwaters (Site 1), located downstream of an urban area (Site 2), and near the basin outfall (Site 3). Results obtained with Allium cepa showed no evidence of chromosomal mutation, either in water or in sediment, during winter or summer seasons, but samples collected below Site 1 showed high toxicity. Physical and chemical analyses showed high concentrations of pollutants at these sites. Ecotoxicity tests with Daphnia magna and Ceriodaphnia dubia measured toxicity in water from Sites 2 and 3 in summer 2004. A toxic effect on Hyalella azteca was only found in sediment from Site 3 during winter 2003 and summer 2004. The results suggest that the synergy among different compounds in domestic and industrial sewage discharges can make it difficult to maintain system stability.
Bibliography:	http://dx.doi.org/10.1016/j.chemosphere.2006.10.048 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0045-6535 1879-1298
DOI:	10.1016/j.chemosphere.2006.10.048