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Heavy metal pollution in Hanoi's urban lakes has become one of the significant environmental issues in the last decades. Research on the toxicity of Pb is necessary due to the extent of its harm to aquatic ecosystems. The toxicity of Pb to aquatic organisms (EC50 values) depends on different environmental conditions. The study was conducted to evaluate the effect of temperature on Pb's toxicity on the test organism Moina Dubia. Moina Dubia belonging to the Cladocera group (Cladocera), an indigenous creature collected at Lake Hanoi. Moina Dubia was cultured under laboratory conditions and has been used to conduct EC50 determination for Pb. Moina Dubia grew and developed well in the laboratory and was suitable as a test organism in toxicological studies. A survey from 24 to 28 o C water temperature conditions showed that the EC50 value decreases from 1402 to 775 ug/l. The combination of temperature and pH strongly affects the toxicity of Pb on Moina Dubia. The apparent impact of water temperature and on the toxicity of Pb showed that global warming might gradually lead to potential biodegradation in freshwater ecology.

COMBINATION IMPACT OF pH AND TEMPERATURE ON THE TOXICITY OF LEAD ON ZOOPLANKTON IN THE CONTEXT OF GLOBAL WARMING