Record Display for the EPA National Library Catalog
RECORD NUMBER: 31 OF 104
|OLS Field Name||OLS Field Data|
|Main Title||Effects of Synthetic Polyelectrolytes on Selected Aquatic Organisms.|
|Author||Biesinger, K. E. ; Stokes, G. N. ;|
|CORP Author||Environmental Research Lab.-Duluth, MN.|
|Additional Subjects||Polyelectrolytes ; Toxicity ; Aquatic biology ; Water pollution ; Minnows ; Daphnia ; Diptera ; Tests ; Polymers ; Cations ; Concentration(Composition) ; Safety ; Bioassay ; Algae ; Detoxification ; Trout ; Exposure ; Clay soils ; Flocculating ; Sewage treatment ; Damage ; Reprints ; Water pollution effects(Animals)|
The acute toxicity of several polyelectrolytes to daphnids (Daphnia magna), fathead minnows (Pimephales promelas), gammarids (Gammarus pseudolimnaeus) and midges (Paratanytarsus parthenogeneticus) was tested. Most nonionic and anionic polyelectrolytes were not toxic at 100 mg/l which was the highest concentration tested. Two of 15 cationic polyelectrolytes were not toxic at 100 mg/l, whereas the toxicity of the others ranged from 0.09 to 70.71 mg/l. A cationic polyelectrolyte was tested in microcosms using five aquatic animals and 10 algae; various adverse effects were observed. Exposure of fathead minnows to a cationic polyelectrolyte resulted in severe gill damage.