Advancing the circular economy: green recovery of rare earth elements (REEs) from coal combustion fly ash using biohydrometallurgical techniques with mixotrophic bacteria. - Chaerun, Siti Khodijah; Winarko, Ronny; Chaerun, Raudhatul Islam; Mufakhir, Fika Rofiek; Lumbantobing, Sarinah Tiodora; Rus, Aisyah Minzikrina Masbar; Ichlas, Zela Tanlega; Minwal, Wahyudin Prawira; Masruri, Muhammad Hafid; Santoso, Imam; Astuti, Widi (Mineral Processing & Extractive Metallurgy, 2025)