Kurniawan, teguh and Bahri, Saiful and Diyanah, Anita and Milenia, Natasya D. and Nuryoto, Nuryoto and Faungnawakij, Kajornsak and Thongratkaew, Sutarat and Huda, Nurul Processes-korespondensi Improving Ammonium Sorption of Bayah Natural Zeolites by Hydrothermal Method. ..