Biological Activity and Toxicity of Some Surfactants Used in Metal Working Fluids on Scendesmus Obliquus Algae
A . El shimy; Noura Saad tantawy; Aziza el Tabi; A.M.A.Omar;
Abstract
Ecotoxicity of surfactants used in metal working fluids (benzyl triethyl ammonium chloride,
benzyl triethanol ammonium chloride, P- methyl benzyl triethanol and P- methyl benzyl triethyl ammonium
chloride) were tested in order to evaluate their possible toxic effects on microalgae. Specific objective of
this research was to compare the sensitivity of fresh green algae Scendesmus Obliquus to those surfactants.
The obtained results showed that the concentration of tested surfactants which resulted in 50% growth
reduction of planktonic green algae, when compared to the controls without test substances (EC50) were
in the range from 0.228 mg./l for P - methyl benzyl triethanol ammonium chloride to 2.65 mg./l for
benzyl triethyl ammonium chloride. The obtained results suggested that all tested surfactants can be
classified as having very toxic effects on freshwater alga Scendesmus Obliquus.
benzyl triethanol ammonium chloride, P- methyl benzyl triethanol and P- methyl benzyl triethyl ammonium
chloride) were tested in order to evaluate their possible toxic effects on microalgae. Specific objective of
this research was to compare the sensitivity of fresh green algae Scendesmus Obliquus to those surfactants.
The obtained results showed that the concentration of tested surfactants which resulted in 50% growth
reduction of planktonic green algae, when compared to the controls without test substances (EC50) were
in the range from 0.228 mg./l for P - methyl benzyl triethanol ammonium chloride to 2.65 mg./l for
benzyl triethyl ammonium chloride. The obtained results suggested that all tested surfactants can be
classified as having very toxic effects on freshwater alga Scendesmus Obliquus.
Other data
| Title | Biological Activity and Toxicity of Some Surfactants Used in Metal Working Fluids on Scendesmus Obliquus Algae | Authors | A . El shimy; Noura Saad tantawy ; Aziza el Tabi; A.M.A.Omar | Keywords | Ecotoxicity;surfactants;Scendesmus obliquus | Issue Date | 2007 | Publisher | INSInet Publication | Journal | Journal of Applied Sciences Research | Volume | 3 | Start page | 245 | End page | 250 |
Attached Files
| File | Description | Size | Format | Existing users please Login |
|---|---|---|---|---|
| Biological activity 2007.pdf | 353.89 kB | Adobe PDF | Request a copy |
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