Alpian1*, Kilinton Sihombing2 , Herwin Joni1 , Mahdi Santoso1 , Grace Sisca1 , Wahyu Supriyati1: KARAKTERISTIK ARANG AKTIF DARI SERBUK LIMBAH KAYU UNTUK MENINGKATKAN KUALITAS AIR (Characteristics of Active Charcoal from Powder Wooden Waste which is Applicable for Improving Water Quality) pdf