KARAKTERISASI PERMUKAAN ARANG AKTIF TEMPURUNG BIJI NYAMPLUNG - Santiyo Wibowo; Balai Penelitian Kehutanan Aek Nauli, Kampus Kehutanan Terpadu Aek Nauli, Sibaganding, Parapat, Sumatera Utara 1174, Indonesia (Directorate of Research and Community Engagement, Universitas Indonesia, 2011)