Effectiveness of Depuration Method on the Elimination of Cadmium (Cd) and Lead (Pb) Heavy Metal Content in Rice Paddy Eel (Monopterus albus, Zuieuw 1793)

Eel is one of Indonesia's important commodities for local and export markets, with local market prices ranging from IDR 25,000 to IDR 50,000/kg and export market prices ranging from 6 to 10 US dollars/kg. Eel commodities in Indonesia are mostly obtained from nature, such as rice fields, but currently, rice fields are not free from pollution. This research aims to analyze the metal content of cadmium (Cd) and lead (Pb) in rice eels (Monopterus albus Zuieuw) after depuration experiments. Research on heavy metal depuration in eels has never been conducted in Indonesia. Rice eels (Monopterus albus Zuieuw) were taken directly from the rice fields of Sungai Batang Village and were then carried out depuration experiments in the laboratory. Depuration was carried out by immersion in controlled water for 3, 5 and 7 days. The results showed the cadmium (Cd) content ranged from 0.037 - 0.156mg/ kg and lead (Pb) ranged from 0.357- 2.230mg/ kg in paddy eels caught in Sungai Batang Village. The Friedman test results showed that depuration did not significantly affect the decrease in cadmium (Cd), while the repeated measure ANOVA test results showed that depuration significantly affected the decrease in lead (Pb) in paddy eels. The highest decrease in cadmium (Cd) and lead (Pb) occurred in the immersion treatment for 3 days.