Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus
The freshwater green alga Ankistrodesmus falcatus was cultured in increasing concentrations of Cr, Hg, Cd, Zn, and Al to evaluate the effect of these cations on its growth. Algal growth was estimated by absorbance at 750 nm. Potassium dichromate was used as reference for test reproducibility. The EC...
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1997
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10534725_v12_n1_p11_Magdaleno http://hdl.handle.net/20.500.12110/paper_10534725_v12_n1_p11_Magdaleno |
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paper:paper_10534725_v12_n1_p11_Magdaleno2023-06-08T16:03:00Z Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus Magdaleno, Anahí Vélez, Carlos Guillermo Accorinti, Juan Ankistrodesmus falcatus Freshwater Green alga Heavy metals Toxicity aluminum chromium dichromate potassium heavy metal lead mercury zinc article ecotoxicology green alga plant growth priority journal reference value toxicity testing water pollution algae Ankistrodesmus Chlorophyta Podohedriella falcata The freshwater green alga Ankistrodesmus falcatus was cultured in increasing concentrations of Cr, Hg, Cd, Zn, and Al to evaluate the effect of these cations on its growth. Algal growth was estimated by absorbance at 750 nm. Potassium dichromate was used as reference for test reproducibility. The EC50 for 3 tests was 1.890 mg L-1 with a coefficient of variation of 40.25%. The 96 h static EC50's for heavy metals (in mg L-1 of nominal concentrations) were as follows: Cr6+/K2Cr2O7, 1.050; Hg2+/Hg(SCN)2, 0.162; Hg2+/HgCl2, 0.074; Cd2+/CdCl2·H2O, 0.292; Zn2+/ZnSO4·7H2O, 2.432; and Al3+/Al2(SO4)3·18H2O, 0.904. Thus yielding a toxicity series such that Hg > Cd > Al > Cr > Zn. These preliminary results suggest that bioassays using A. falcatus could be suitable for evaluating the toxicity of heavy metals in freshwaters. Fil:Magdaleno, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vêlez, C.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Accorinti, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10534725_v12_n1_p11_Magdaleno http://hdl.handle.net/20.500.12110/paper_10534725_v12_n1_p11_Magdaleno |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ankistrodesmus falcatus Freshwater Green alga Heavy metals Toxicity aluminum chromium dichromate potassium heavy metal lead mercury zinc article ecotoxicology green alga plant growth priority journal reference value toxicity testing water pollution algae Ankistrodesmus Chlorophyta Podohedriella falcata |
| spellingShingle |
Ankistrodesmus falcatus Freshwater Green alga Heavy metals Toxicity aluminum chromium dichromate potassium heavy metal lead mercury zinc article ecotoxicology green alga plant growth priority journal reference value toxicity testing water pollution algae Ankistrodesmus Chlorophyta Podohedriella falcata Magdaleno, Anahí Vélez, Carlos Guillermo Accorinti, Juan Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus |
| topic_facet |
Ankistrodesmus falcatus Freshwater Green alga Heavy metals Toxicity aluminum chromium dichromate potassium heavy metal lead mercury zinc article ecotoxicology green alga plant growth priority journal reference value toxicity testing water pollution algae Ankistrodesmus Chlorophyta Podohedriella falcata |
| description |
The freshwater green alga Ankistrodesmus falcatus was cultured in increasing concentrations of Cr, Hg, Cd, Zn, and Al to evaluate the effect of these cations on its growth. Algal growth was estimated by absorbance at 750 nm. Potassium dichromate was used as reference for test reproducibility. The EC50 for 3 tests was 1.890 mg L-1 with a coefficient of variation of 40.25%. The 96 h static EC50's for heavy metals (in mg L-1 of nominal concentrations) were as follows: Cr6+/K2Cr2O7, 1.050; Hg2+/Hg(SCN)2, 0.162; Hg2+/HgCl2, 0.074; Cd2+/CdCl2·H2O, 0.292; Zn2+/ZnSO4·7H2O, 2.432; and Al3+/Al2(SO4)3·18H2O, 0.904. Thus yielding a toxicity series such that Hg > Cd > Al > Cr > Zn. These preliminary results suggest that bioassays using A. falcatus could be suitable for evaluating the toxicity of heavy metals in freshwaters. |
| author |
Magdaleno, Anahí Vélez, Carlos Guillermo Accorinti, Juan |
| author_facet |
Magdaleno, Anahí Vélez, Carlos Guillermo Accorinti, Juan |
| author_sort |
Magdaleno, Anahí |
| title |
Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus |
| title_short |
Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus |
| title_full |
Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus |
| title_fullStr |
Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus |
| title_full_unstemmed |
Preliminary toxicity tests using the green alga, Ankistrodesmus falcatus |
| title_sort |
preliminary toxicity tests using the green alga, ankistrodesmus falcatus |
| publishDate |
1997 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10534725_v12_n1_p11_Magdaleno http://hdl.handle.net/20.500.12110/paper_10534725_v12_n1_p11_Magdaleno |
| work_keys_str_mv |
AT magdalenoanahi preliminarytoxicitytestsusingthegreenalgaankistrodesmusfalcatus AT velezcarlosguillermo preliminarytoxicitytestsusingthegreenalgaankistrodesmusfalcatus AT accorintijuan preliminarytoxicitytestsusingthegreenalgaankistrodesmusfalcatus |
| _version_ |
1768545985945927680 |