Jinnapat , Apichart, and Auamporn Rattanasing. “A Study of Absorption Capacity of Zinc Ions onto Coffee Residue Activated Carbon”. NKRAFA JOURNAL OF SCIENCE AND TECHNOLOGY 17, no. 2 (December 30, 2021): 69–78. Accessed May 5, 2024. https://ph02.tci-thaijo.org/index.php/nkrafa-sct/article/view/245521.