Elysabeth, Tiur, Zulnovri, Gina Ramayanti, Setiadi, and Slamet. 2019. “Modification of Lampung and Bayah Natural Zeolite to Enhance the Efficiency of Removal of Ammonia from Wastewater”. Asian Journal of Chemistry 31 (4):873-78. https://doi.org/10.14233/ajchem.2019.21810.