Ammonia Adsorption Process using Sarulla Natural Zeolite from North Sumatera, IndonesiaAmir Husin, Friday Hotmauli Aruan, Adri Huda, Netti Herlina and Sarah Patumona ManaluE3S Web Conf., 519 (2024) 03028DOI: https://doi.org/10.1051/e3sconf/202451903028