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Use of selenastrum capricornutum to assess the toxicity potential of surface and ground water contamination caused by chromium waste
Author(s) -
Greene Joseph C.,
Miller William E.,
Debacon Mary,
Long Michael A.,
Bartels Cathy L.
Publication year - 1988
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.5620070106
Subject(s) - selenastrum , bioassay , chromium , environmental chemistry , contamination , ec50 , toxicity , ceriodaphnia dubia , environmental science , acute toxicity , chemistry , biology , ecology , biochemistry , organic chemistry , in vitro
United Chrome Products, Inc. (Corvallis, OR), discharged liquid chrome‐plating wastes into an on‐site dry well from 1957 to 1977. Samples were collected from ground and surface waters during February and December 1984 and evaluated for toxicity potential using 96‐h Selenastrum capricornutum bioassays. Bioassays of the February samples were used to calculate predicted EC50 values for different chromium concentrations, which were then compared with the chromium concentrations measured in the December samples and with the results of S. capricornutum bioassays on these samples. An excellent correlation was obtained between the predicted EC50 values and the actual bioassay response values for ground water and drainage ditch samples. However, no correlation was obtained with the off‐site surface water samples. These results could not be explained by changes in chromium valence, and they demonstrate that, even in simple systems, toxicity cannot readily be predicted based solely on chemical analysis.