Napitupulu, M., Walanda, D. K., Natakusuma, Y., Basir, M., & Mahfudz. (2018). Capacity of Adsorption of Cadmium (II) Ion by Bio-charcoal from Durian Barks. Journal of Surface Science and Technology, 34(1-2), 30–36. https://doi.org/10.18311/jsst/2018/11055