Effectiveness of Adsorption of Heavy Metal Cadmium (CD) and Mercury (HG) Levels on Green Mussels in Jakarta Bay by Absorption Coconut Shell Charcoal and Rice Husk Charcoal

Abstract

Perna viridis otherwise known as “green mussel" is a shellfish that has high economic value, consumption of green mussels in Indonesia reaches 50,000 tons per year, and most of it comes from Jakarta Bay. Apart from being nutritious, shellfish are also often a source of food poisoning, research results on green mussels in Jakarta Bay almost all heavy metals are in it. The aim is to determine the Effectiveness of Adsorption of Heavy Metal Cadmium (Cd) and Mercury (Hg) Levels in Jakarta Bay Green Mussels Using Coconut Shell Charcoal and Rice Husk Charcoal at the Environmental Health Laboratory in 2023, this research method is experimental to determine the effectiveness of using variations of activated charcoal from coconut shells and rice husks in absorbing heavy metals in green kerrang from Jakarta Bay, this research was carried out in 2 stages over 2 years. Phase I of the research tested the effectiveness of variations in activated charcoal absorbent and the results of phase I showed that variations in the composition of activated charcoal from coconut shells and husks rice are as follows: A (control) B (100% CS), C (100% RH,) D (75% CS, 25% RH) E (50% CS, 50% RH), F (25% CS, 75% RH) with varying lengths of soaking time in water (0 minutes, 30 minutes, 60 minutes and 90 minutes) produced the most effective value in absorbing Cd (Cadmium) in all variations of activated charcoal composition and produced <0.033 mg/l in all research time variations are by SNI-06-6989.16-2004, while the results of statistical tests for the most effective absorption of mercury are in Variations A6, A9, B3, B6, B9, C3, C6, C9, D3, D6, D9 results < 1 mg / l meets the requirements according to SNI-06-6989.16-2004. It can be concluded that the higher the % composition of Rice Husk, the less effective it is in absorbing mercury levels in green mussels.