Determination of LC_50 from daphnia magna in treated Industrial waste waters and non-treated hospital effluents

摘要

The water flea Daphnia magna Straus is the most commonly used zooplankton species in toxicological tests. This information has been used to set water quality criteria. In this paper, the proposed Mexican standard for waste water testing is described and results obtained from different treated industrial waste waters and non-treated hospitals effluents by this method are presented. The results show that daphnids have a sensitivity close to that reported in the literature, since the LC_50 determined for SDS is similar to previous results.