Palapa, Neza Rahayu, Tarmizi Taher, Alfan Wijaya, and Aldes Lesbani. 2021. “Modification of Cu/Cr Layered Double Hydroxide by Keggin Type Polyoxometalate As Adsorbent of Malachite Green from Aqueous Solution”. Science and Technology Indonesia 6 (3):209-17. https://doi.org/10.26554/sti.2021.6.3.209-217.