. Gusmini, Endar Hidayat, Hiroyuki Harada, & Katsutoshi Inoue. (2021). Research on Separation of Heavy Metals by Utilizing Biomass for Environmental Remediation and 3R. Challenging Issues on Environment and Earth Science Vol. 4, 43–62. https://doi.org/10.9734/bpi/ciees/v4/8919D