Express-assessment of potential hazard of water by method of biotesting using Daphnia magna S.

Abstract

The purpose. Increase of selfdescriptiveness of biotesting waters of surface sources of water service and drinking water on shellfishes Daphnia magna S. due to use of the test-attribute of frequency of cordial beatings (FCB). Methods. Biotesting by determination of immobilization of D. magna during 48-hour exposure and FCB – in conditions of 3-hour exposure. Results. Toxicity of water is not fixed at absence of immobilization of D. magna. By index of FCB their low level of toxicity (26,2 — 35,4%) is determined. Conclusions. Express-assessment of toxicity of waters of surface sources of water service and drinking water is expedient to conduct on D. magna using test-attribute FCB after 3-hour exposure. The high performance of the offered method is proved in conditions CF «Zhytomyrvodokanal». Use of test-attribute FCB in comparison to standard index (immobilization of D. magna) promoted increase of responsivity of biotesting for 28,33% and decrease of its duration for 73,11%.