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Acute and long‐term toxicity of water‐soluble cationic polymers to rainbow trout ( Oncorhynchus mykiss ) and the modification of toxicity by humic acid
Author(s) -
Goodrich Mark S.,
Dulak Linda H.,
Friedman Marvin A.,
Lech John J.
Publication year - 1991
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620100411
Subject(s) - rainbow trout , humic acid , cationic polymerization , toxicity , chemistry , polymer , bioassay , environmental chemistry , daphnia magna , acute toxicity , dimethylamine , chromatography , nuclear chemistry , organic chemistry , fish <actinopterygii> , biology , ecology , fishery , fertilizer
The toxicity of two classes of cationic polymers, epichlorhydrin/dimethylamine polyamines and quaternary amine copolymers, were investigated. Static bioassays of those polymers resulted in LC50 concentrations ranging from 271 μg/L to 1,733 μg/L. Under flow‐through conditions the toxicity was 1.7 to 13.9 times greater, depending on the polymer used. Using a reference humic acid along with the polymers in toxicity studies, strong correlations were established between humic acid concentration and LC50. Even at a fairly low humic acid concentration (5 mg/L), the toxicity of the polymers was reduced 7‐ to 16‐fold. At higher humic acid concentrations (50 mg/L), cationic polymer toxicity was reduced 33‐ to 75‐fold.