Toxicity tests of chlorinated hydrocarbons on the river mussel, Unio crassus (Bivalvia, Unionidae)

Andrei Sárkány-Kiss, Ildikó Herczeg, Barbara Palombi, István Grigorszky, László Antal, István Bácsi, Attila Mozsár, Attila Ferenc Kalmár, Sándor Alex Nagy

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Abstract

The toxicity of three highly volatile organic solvents - tetrachloroethane (Cl2HC-CHCl2), tetrachloroethylene (Cl2C=CCl2), trichloroethylene (ClHC=CCl2) - was studied on Unio crassus specimens. The tested chlorinated hydrocarbons sink to the bottom of standing water bodies due to their high density; therefore they represent an increased risk for benthic organisms. For a start, all three compounds were applied in 100% saturation. In the case of tetrachloroethylene and trichloroethylene all specimens died within a few days. In the case of tetrachloroethane the intoxication process was much faster, all the specimens died within 4 hours. Tetrachloroethane proved to be the most toxic compound; its diluted solutions were further tested: in the 5% solution all U. crassus specimens died after 24 hours. The 1% solution had a strong disturbing effect on the behaviour of the bivalves, which was gradually moderated and eventually stopped on the 33rd day. These results suggest that the examined chlorinated hydrocarbons are strongly toxic to living organisms even in aquatic medium and cause rapid death even in low concentrations.

Original languageEnglish
Pages (from-to)358-361
Number of pages4
JournalNorth-Western Journal of Zoology
Volume8
Issue number2
Publication statusPublished - Dec 2012

Keywords

  • Chlorinated hydrocarbons
  • Mussels
  • Toxicity test

ASJC Scopus subject areas

  • Animal Science and Zoology

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    Sárkány-Kiss, A., Herczeg, I., Palombi, B., Grigorszky, I., Antal, L., Bácsi, I., Mozsár, A., Kalmár, A. F., & Nagy, S. A. (2012). Toxicity tests of chlorinated hydrocarbons on the river mussel, Unio crassus (Bivalvia, Unionidae). North-Western Journal of Zoology, 8(2), 358-361.