Data/hora: 10/06/2024 15:22:18

Provedor de dados: | 52
País: | Brazil
Título: | Cadmium and Chromium Toxicity to Pseudokirchneriella subcapitata and Microcystis aeruginosa
Autores: | Rodgher,Suzelei; Espíndola,Evaldo Luiz Gaeta; Simões,Fernanda Cristina Fonseca; Tonietto,Alessandra Emanuele.
Data: | 2012-02-01
Ano: | 2012
Palavras-chave: | Toxic effects; Algae sensitivity; Metal accumulation; IC50.
Resumo: | The toxicity of cadmium and chromium to Pseudokirchneriella subcapitata and Microcystis aeruginosa was evaluated through algal growth rate during 96h exposure bioassays. Free metal ion concentrations were obtained using MINEQL+ 4.61 and used for IC50 determination. Metal accumulations by the microorganisms were determined and they were found to be dependent on the concentration of Cd2+ and Cr6+. IC50 for P. subcapitata were 0.60 µmol L-1 free Cd2+ and 20 µmol L-1 free Cr6+, while the IC50 values for M. aeruginosa were 0.01 µmol L-1 Cd2+ and 11.07 µmol L-1 Cr6+ . P. subcapitata accumulated higher metal concentrations (0.001 -0.05 µmol Cd mg-1 dry wt. and 0.001 -0.04 µmol Cr mg-1 dry wt) than the cyanobacteria (0.001 -0.01 µmol Cd mg-1 dry wt and 0.001 -0.02 µmol Cr mg-1 dry wt). Cadmium was more toxic than chromium to both the microorganisms.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000100020
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132012000100020
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.55 n.1 2012
Fonte: | info:eu-repo/semantics/openAccess