%0 Journal Article
%T Cadmium and Chromium Toxicity to Pseudokirchneriella subcapitata and Microcystis aeruginosa
%A Rodgher
%A Suzelei
%A Esp¨ªndola
%A Evaldo Luiz Gaeta
%A Sim£¿es
%A Fernanda Cristina Fonseca
%A Tonietto
%A Alessandra Emanuele
%J Brazilian Archives of Biology and Technology
%D 2012
%I Tecpar
%R 10.1590/S1516-89132012000100020
%X 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 ¦̀mol l-1 free cd2+ and 20 ¦̀mol l-1 free cr6+, while the ic50 values for m. aeruginosa were 0.01 ¦̀mol l-1 cd2+ and 11.07 ¦̀mol l-1 cr6+ . p. subcapitata accumulated higher metal concentrations (0.001 -0.05 ¦̀mol cd mg-1 dry wt. and 0.001 -0.04 ¦̀mol cr mg-1 dry wt) than the cyanobacteria (0.001 -0.01 ¦̀mol cd mg-1 dry wt and 0.001 -0.02 ¦̀mol cr mg-1 dry wt). cadmium was more toxic than chromium to both the microorganisms.
%K toxic effects
%K algae sensitivity
%K metal accumulation
%K ic50.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-89132012000100020&lng=en&nrm=iso&tlng=en