Ion-exchange process for ammonium removal and release using natural Iranian zeolite

17- Malekian R., J. Abedi-Koupai and S.S.  Eslamian, S.S. Mousavi, K.C. Abbaspour and M. Afyuni, 2010. Ion-exchange process for ammonium removal and release using natural Iranian zeolite.  Applied Clay Science. 51: 323-329.