Resumo

ARROYAVE Q, Catalina; ARAQUE M, Pedronel  e  PELAEZ J, Carlos A. BIOACCUMULATION AND TOXICITY EVALUATION OF CADMIUM AND MERCURY IN LLANERO GRASS (Brachiaria dictyoneura). Vitae [online]. 2010, vol.17, n.1, pp.45-49. ISSN 0121-4004.

The transfer of mercury and cadmium in Brachiaria dictyoneura was studied in terms of bioaccumulative capacity and as a bioindicator. During the evaluation cadmium in B. dictyoneura show a decrease of 65%. The toxicity of cadmium was correlated with the consecutive accumulation of the cation during the monitoring time. With respect to mercury, a decrease in cation content in the plant was observed 30 days after exposure, presenting possible phytoreductión of mercury ion Hg²⁺ to Hg⁰ in B. dictyoneura and subsequent evaporation. The tolerance and accumulator capacity of B. dictyoneura could be used for phytoremediation of sites co-contaminated with Cd and Hg.

Palavras-chave : heavy metals; transfer; phytotoxicity; phytoreductión; phytoremediation.

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