Rainiyati, R., A. Riduan, S. F. Heraningsih, and B. A. Mukhtasida. “Mercury Removal from Gold Mining Wastewater Using Palm Oil Fuel Ash (POFA)”. Journal of Degraded and Mining Lands Management, vol. 9, no. 3, Apr. 2022, pp. 3525-31, doi:10.15243/jdmlm.2022.093.3525.