The utilization of kepok banana (Musa parasidiaca L) peel as adsorption material in removal of cadmium metal (Cd) in radiological wastewater

Manual X-ray Film washing wastewater produced from radiology installation categorized as hazardous waste can be a severe problem for the environment. One of the contents of radiological wastewater is Cd metal. Furthermore, the adsorption method was a promising alternative, and the adsorbent used from kepok banana (Musa parasidiaca L) peel waste. Making kepok banana peel adsorbent was by drying in the sun, carbonization with a furnace at high temperature. Then, it was sieved with a size of 100 meshes, activated with H2SO4, and soaked for 24 hours. Moreover, the experiment was on a batch scale with a jar test tool for the moving process. Variations in mixing speed (rpm) of 100 and 150 with variations in contact time of 15, 30, 45, 60, 75, and 90 minutes, and adsorbent mass of 10 grams. The optimum conditions of mixing variation obtain at a contact time of 60 minutes and a mixing speed of 150 rpm getting 97.51% removal efficiency. The concentration of Cd metal was 3.294 mg/L. Meanwhile, after the adsorption process, the effluent concentration reached 0.08 mg/L, which met the effluent standard of 0.1 mg/L for Cadmium (Cd) from The Decree of Environmental Minister Number 05 Year 2014.