SYMPOSIA PAPER Published: 01 January 1993

Toxicity Characterization of Chronically Toxic Industrial Wastewaters


This study investigated the extent and cause of chronic toxicity to Ceriodaphnia dubia in wastewaters from a chemical manufacturing facility. Aliquots of wastewater were manipulated to render groups of toxicants unavailable and changes in toxicity resulting from each manipulation were monitored using a 4-day C. dubia test.

Results from two rounds of testing indicate that elutriate from granular activated carbon (GAC) columns showed the greatest reduction in chronic toxicity. The mean number of neonates produced per adult female exposed to the elutriate from GAC columns was 24.20 and 20.70 as compared to 14.80 and 14.11 neonates produced in the respective baseline test. GAC is effective in adsorbing synthetic organic compounds which may be the cause of chronic toxicity. This study shows that procedures developed for characterization of acutely toxic wastewaters can be successfully adapted for use with wastewaters showing chronic toxicity. The 4-day C. dubia test was also shown to be useful in performing chronic toxicity identification evaluations.

Author Information

Khan, AA
Aquatic Toxicology Laboratory, IT Corporation, Edison, NJ
Kent, DJ
Technology Sciences Group Inc., Washington, D.C.
Barbieri, JF
Mobil Oil Corporation, Princeton, NJ
Sweeney, FP
Parametrix, Inc., Kirkland, WA
Khan, SA
Aquatic Toxicology Laboratory, IT Corporation, Edison, NJ
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Developed by Committee: E47
Pages: 240–250
DOI: 10.1520/STP13158S
ISBN-EB: 978-0-8031-5257-1
ISBN-13: 978-0-8031-1485-2