TITANIA, OPI MIDA (2026) APLIKASI BIOCHAR LIMBAH KOPI TERHADAP PENURUNAN KANDUNGAN LOGAM KROMIUM (Cr) DAN NIKEL (Ni) PADA LIMBAH CAIR PERTAMBANGAN NIKEL=APPLICATION OF BIOCHAR FROM COFFEE WASTE ON REDUCTION OF CHROMIUM(Cr) AND NICKEL (Ni) METAL CONTAINMENTS IN NICKEL MINING WASTEWATER. Thesis thesis, Universitas Hasanuddin.