Cadmium and chromium toxicity to Pseudokirchneriella subcapitata and Microcystis aeruginosa
| Autor: | Fernanda Cristina Fonseca Simões, Evaldo Luiz Gaeta Espíndola, Suzelei Rodgher, Alessandra Emanuele Tonietto |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Cyanobacteria
ALGAS Cadmium Multidisciplinary biology lcsh:Biotechnology algae sensitivity chemistry.chemical_element IC50 biology.organism_classification metal accumulation Metal Chromium chemistry Toxic effects lcsh:TP248.13-248.65 Environmental chemistry visual_art Toxicity visual_art.visual_art_medium Bioassay Microcystis aeruginosa Chromium toxicity |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Brazilian Archives of Biology and Technology, Volume: 55, Issue: 1, Pages: 161-169, Published: FEB 2012 Brazilian Archives of Biology and Technology v.55 n.1 2012 Brazilian Archives of Biology and Technology Instituto de Tecnologia do Paraná (Tecpar) instacron:TECPAR Brazilian Archives of Biology and Technology, Vol 55, Iss 1, Pp 161-169 (2012) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|