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| Formato: | Artículo científico |
| Lenguaje: | en |
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Academia Brasileira de Ciências
2016
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=32746362010 |
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- Arsenic toxicity to cladocerans isolated and associated with iron: implications for aquatic environments SUELLEN C.M. SALES ARNOLA C. RIETZLER MARCELA M. RIBEIRO Multidisciplinaria (Ciencias Naturales y Exactas) metals similis silvestrii Aquatic ecotoxicology acute and chronic effects Arsenic is an ametal ubiquitous in nature and known by its high toxicity. Many studies have tried to elucidate the arsenic metabolism in the cell and its impact to plants, animals and human health. In aqueous phase, inorganic arsenic is more common and its oxidation state (As III and As V) depends on physical and chemical environmental conditions. The aim of this study was to evaluate toxicity of arsenic to Daphnia similis and Ceriodaphnia silvestrii, isolated and associated with iron. The results showed differences in toxicity of As III and As V toboth species. Effective concentration (EC50) mean values were 0.45 mg L-1 (As III) and 0.54 mg L-1 (As V) for D. similis,and 0.44 mg L-1 (As III) and 0.69 mg L-1 (As V) for C. silvestrii. However, As V IC25 mean value was 0.59 mg L-1, indicating that C. silvestrii has mechanisms to reduce arsenic toxicity. On the other hand, when associated with iron at 0.02 and 2.00 mg L-1, EC50 values decreased for D. similis (0.34 and 0.38 mg L-1) as well as C. silvestrii (0.37 and 0.37 mg L-1), showing synergistic effect of these substances. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32746362010 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.88