N. A. . Yahya, N. A. . Mazlan, N. H. . Abd Khalid, and N. H. H. . Hairom, “Eggshell/TiO2 Composite for Palm Oil Mill Secondary Effluent Treatment”, MARI, vol. 2, no. 2, pp. 253–259, May 2021, Accessed: Jul. 18, 2024. [Online]. Available: https://penerbit.uthm.edu.my/periodicals/index.php/mari/article/view/2066