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portuguesO processo de identificacao de uma area contaminada envolve uma avaliacao preliminar que consiste em analise quimica e comparacao com valores orientadores. No Brasil, esses valores constam na Resolucao CONAMA no 420/2009, baseados em analises quimicas e fitotoxicidade. O objetivo deste trabalho foi avaliar a ecotoxicidade do cobre em dois solos naturais do Estado do Rio de Janeiro, um Planossolo Haplico (arenoso) e um Argissolo Vermelho‑Amarelo (textura media), para verificar se os valores estabelecidos pela legislacao oferecem protecao a fauna do solo. Foram realizados ensaios de letalidade e de reproducao com minhocas da especie Eisenia andrei e com colembolos da especie Folsomia candida. Os resultados indicaram no Planossolo valores de cobre para E. andrei de CL50 435 mg kg-1 e CE50 29 mg kg-1e para F. candida CL10 137 mg kg-1e EC50 117 mg kg-1. No Argissolo esse resultado foi para E. andrei CL50 690 mg kg- e CE50 61 mg kg-, e para F. candida CL10 42 mg kg- e CE50 138 mg kg-1 . Os valores encontrados sao menores que o valor de investigacao (200 mg kg-1) estabelecidos pela resolucao 420/09 do CONAMA, indicando que concentracoes menores do que os valores-limite podem afetar esses organismos, a depender do tipo de solo. As minhocas mostraram-se mais sensiveis que os colembolos a contaminacao por cobre, e o solo arenoso mostrou‑se mais suscetivel a apresentar ecotoxicidade diante de uma contaminacao por cobre, devida, provavelmente, a maior biodisponibilidade do metal. Os ensaios de ecotoxicidade devem ser considerados no desenvolvimento de valores orientadores para solos. EnglishThe process of identifying a contaminated area involves a preliminary assessment consisting of chemical analysis and comparison with guideline values. In Brazil, these values are included in the CONAMA Resolution no. 420/2009, based on chemical analysis and phytotoxicity. The objective of this research was to evaluate the ecotoxicity of copper in two natural soils in the state of Rio de Janeiro, a Haplic Planosol (sandy) and a Red-Yellow Argisol (medium texture), to verify if the values established by the legislation offer protection to the soil fauna. Lethality and reproduction tests were performed with Eisenia andrei worms and Folsomia candida springtails. Results indicated copper values in Planosol as LC50 435 mg kg 1 and EC50 29 mg kg 1 for E. Andrei and LC10 137 mg kg 1 and EC50 117 mg kg 1 for F. candida. In Argisol, these results were LC50 690 mg kg 1 and EC50 61 mg kg 1 for E. andrei, and LC10 42 mg kg 1 and EC50 138 mg kg 1 for F. candida. Values reported are lower than the research value (200 mg kg-1) established by the CONAMA resolution 420/09, indicating that concentrations lower than the limit values may affect these organisms, depending on the type of soil. Worms were more sensitive than springtails to copper contamination, and sandy soil was more susceptible to ecotoxicity due to copper contamination, probably due to the greater bioavailability of the metal. Results of such ecotoxicity tests should be considered in the development of soil guideline values.

Ecotoxicity test as an aid in the determination of copper guideline values in soils