Comparative whole effluent toxicity assessment of wastewater treatment plant effluents using Daphnia magna.
An approach to compare the toxicities employing the whole effluent toxicity (WET) test, using Daphnia magna and chemical analysis with GC/MS and ICP/MS, was conducted to the nine South Korean wastewater treatment plants (WWTPs). From the chemical analysis and bioassay experiments, heavy metals (i.e., Cu and Zn) were found to be the major compounds causing toxic effects toward D. magna. In the whole effluent toxicity (WET) tests using D. magna, toxicities were observed in 34% of the effluent samples. However, the biological toxic unit (TU) value showed a non-toxic response (i.e., 0 TU) in many samples despite the response indicated by the chemical TU values. This may be due to the species sensitivity, environmental parameters, mixture effects, and limitation of the chemical analyses.
Ra
Jin Sung
JS
Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Buk-Gu, Gwangju, South Korea.
Lee
Byoung Cheun
BC
Chang
Nam Ik
NI
Kim
Sang Don
SD
D000818:Animals; D003621:Daphnia / Q000187:drug effects*; D008401:Gas Chromatography-Mass Spectrometry; D007928:Lethal Dose 50; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D018508:Water Purification
D014874:Water Pollutants, Chemical