This research studied to utilize the bagasse to be used as activated karbon in particular for the adsorption of Ca2+. The manufacture of activated carbon consists of carbonization dan activation process. Temperature variation for carbonization process in this research are 500Â°C, 550Â°C, 600Â°C, 650Â°C and 700Â°C then proceed with the activation process by carbon reflux with 6 M H2SO4 for 4 hours. Carbonization yield will decrease with increasing temperature carbonization. While the ash content, surface area, pore volume, and adsorption capacity of Ca2+ will increase with increasing temperature of carbonization. Obtained activated carbon is best activated karbon made at a temperature of 700Â°C with an activation carbonization which has a surface area 100.62 m2/g, 22.3750 Ã
pore diameter, pore volume of 22.376 mL/g, can eliminate the Ca2+ up to 13.26 %.
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