Alfian, Azyyati Ridha, Nindi Octaviani, Aken Puti Nandi Nanti, Muhammad Varrel Anandito, Shirly Rizky, and Trianda Nurlia Hidayat. 2024. “THE EFFECTIVENESS AND EFFICIENCY OF OPUNTIA FICUS-INDICA (OFI) POWDER IN REMOVING Fe, Mn, AND As METAL CONTAMINATION IN WATER TREATMENT”. Suranaree Journal of Science and Technology 31 (1):030170(1-7. https://doi.org/10.55766/sujst-2024-01-e02530.