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Acute toxicity to Daphnia magna of effluents containing Cd, Zn, and a mixture Cd‐Zn, after metal removal by Chlorella vulgaris
Author(s) -
CañizaresVillanueva R. O.,
MartínezJerónimo F.,
EspinosaChávez F.
Publication year - 2000
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 - 10.1002/1522-7278(2000)15:3<160::aid-tox2>3.0.co;2-7
Subject(s) - daphnia magna , cadmium , zinc , toxicity , effluent , chlorella vulgaris , chemistry , acute toxicity , metal toxicity , environmental chemistry , zinc toxicity , nuclear chemistry , biology , environmental engineering , botany , algae , environmental science , organic chemistry
Daphnia magna was used as a test organism for assessing the toxicity remaining in simulated effluents containing cadmium, zinc, and a cadmium‐zinc mixture, after these metals were removed with suspended and immobilized Chlorella vulgaris cultures. The percentage of removal was higher (84.7%) for cadmium in the metal mixture with immobilized cultures. The LC 50 value was lower for the residual cadmium (single and in the mixture) in the effluent after treatment with suspended cultures. The acute toxicity response observed in D. magna , indicates that zinc has an antagonistic effect on cadmium toxicity. According to the results, the treatment system can modify the Cd acute residual toxicity. © 2000 John Wiley & Sons, Inc. Environ Toxicol 15: 160–164, 2000<