Irfandy F, Ristianingsih Y, Istiani A. Study of the activity of activated carbon impregnated with Fe2O3 as a biosorbent for methylene blue from wastewater. Eksergi [Internet]. 2021 Nov. 1 [cited 2025 Aug. 21];18(2):89-92. Available from: https://jurnal.upnyk.ac.id/index.php/eksergi/article/view/4536