Nasir N, Daud Z, Awang H, et al. Utilization of Empty Fruit Bunch as Potential Adsorbent for Ammonia Nitrogen Removal in Natural Rubber Wastewater. ijie. 2018;10(8). Accessed July 18, 2024. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2452