Nipa palm (Nypa frutican Wurmb) is one of the most abundant plantation products in Indonesia, especially Sumatra. Nipa palm shell is one part of nipa that potentially used as an adsorbent, due to its content 45.6% of cellulose, 23.5% of hemicellulose and 19.4% of lignin. The aim of this research were to determine the optimum condition of carbonization temperature and irradiation time. The nipa …