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Toxicity evaluation of metal plating wastewater employing the Microtox® assay: A comparison with cladocerans and fish
Author(s) -
Choi Kyungho,
Meier Peter G.
Publication year - 2001
Publication title -
environmental toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.813
H-Index - 77
eISSN - 1522-7278
pISSN - 1520-4081
DOI - 10.1002/tox.1017
Subject(s) - ceriodaphnia dubia , pimephales promelas , minnow , daphnia magna , acute toxicity , environmental chemistry , toxicity , toxicant , bioassay , toxicology , effluent , biology , wastewater , ecotoxicology , cadmium , biomonitoring , cladocera , aquatic toxicology , chemistry , fish <actinopterygii> , environmental science , ecology , fishery , environmental engineering , crustacean , organic chemistry
The relative sensitivity of the Microtox assay is closely related to the type of toxicant, and hence its utility in biomonitoring effluents is better evaluated on a case‐by‐case basis. The Microtox® assay, employing the marine bacterium Vibrio fischeri , was evaluated for its applicability in monitoring metal plating wastewater for toxicity. The results of the Microtox assay after 5, 15, and 30 min of exposure, were compared with data obtained from conventional whole effluent toxicity testing (WET) methods that employed Daphnia magna , Ceriodaphnia dubia , and the fathead minnow ( Pimephales promelas ). The Microtox assay produced notably comparable EC50 values to the LC50 values of the acute fathead minnow toxicity test (<0.5 order of difference). The Spearman's rank correlation analyses showed that the bacterial assay, regardless of exposure duration, correlated better with the acute fish than the daphnid results ( p <0.05). These observations were consistent to other studies conducted with inorganic contaminants. The relative sensitivity of the 30‐min Microtox assay was within the range of the two frequently used acute daphnid/fish toxicity tests. In conclusion, the Microtox assay correlated well with the acute fathead minnow data and is well suited for toxicity monitoring for these types of industrial wastes. © 2001 John Wiley & Sons, Inc. Environ Toxicol 16: 136–141, 2001