“Removal of Mn+2 and Fe+3 ions from waste water and underground water using Calcium Silicate (CS)”, GJSFR, vol. 12, no. B1, pp. 51–57, Jan. 2012, Accessed: Feb. 06, 2026. [Online]. Available: https://www.journalofscience.org/index.php/GJSFR/article/view/100142