The manufacture of activated carbon from carbonized coffee grounds is carried out using a furnace, with variations in carbonization temperatures of 300°C, 400°C, 500°C, variations carbonization time of 30 minutes, 60 minutes, 90 minutes, 120 minutes and variations in activator concentrations 0,5 M, 1 M, 1,5 M and 2 M. Then testing the characteristics of activated carbon by analyzing water co…