Abstract
Efficiency of activated carbons (ACs) between coffee ground, leaves soybean straw and tea leaves were investigated. All three types of waste can be found widely in the local area. The synthesis of ACs consists of 2 parts. Firstly, preparation of coffee grounds, tea leaves and soybean straw were dried at 100 °C for 24 h, and then carbonized at 560 °C. Second part, the activated carbon was activated with 1 molar of nitric acid (HNO3) and after that was activated by 1 molar of potassium hydroxide (KOH), washed with DI water to neutralize and dried at 100 °C. Their surface morphology and functional group of the ACs were characterized. The morphology of soybean straw shows the high porosity and increase in oxygenated functional group, implies that easy allow water to seep into surface. These results suggest that can be use filtrate material for filtration system.
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