title: The effects of hydraulic loading and NaCl concentrations on the regeneration of exhausted homoionic natural zeolite.
abstract: A study of the suitable operational conditions for the regeneration of exhausted homoionic natural zeolite with ammonium was carried out. Laboratory-scale columns using NaCl solutions with concentrations of 2 and 4 mol/L and hydraulic loadings of 4, 6 and 8 bed volumes per hour (BV/h) were assessed. For both NaCl concentrations studied, the hydraulic load of 6 BV/h showed the highest ammonia nitrogen output from the exhausted zeolite bed. Results showed that the hydraulic load (BV/h) had a greater influence on the regeneration efficiency than the concentration of the regenerating solution.
authors.affiliation: Laboratorio de Microbiología Ambiental y Tratamiento de Residuales, Universidad Autónoma Metropolitana, Iztapalapa, México, D.F.
authors.forename: Zhenia
authors.initials: Z
authors.lastname: Milán
authors.forename: Silvio
authors.initials: S
authors.lastname: Montalvo
authors.forename: Carlos
authors.initials: C
authors.lastname: de Las Pozas
authors.forename: Oscar
authors.initials: O
authors.lastname: Monroy
authors.forename: Enrique
authors.initials: E
authors.lastname: Sánchez
authors.forename: Rafael
authors.initials: R
authors.lastname: Borja
mesh_terms: D000641:Ammonia / Q000032:analysis* / Q000737:chemistry; D012965:Sodium Chloride / Q000032:analysis* / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D017641:Zeolites; D012965:Sodium Chloride; D000641:Ammonia