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¹ Centre National de Recherche et de Développement de la Pêche et d'Aquaculture, Tipaza, Algérie
² Ecole Nationale Supérieure des Sciences de la Mer et de l'Aménagement du Littoral, Algiers, Algérie.
³ Laboratoire d’Etude Physico-Chimique des Matériaux et Application à l’Environnement, Faculté de chimie, Université des Sciences et de la Technologie Houari Boumediene, Alger, Algérie
⁴ Laboratoire Eau Environnement et Développement Durable, Faculté de Technologie, Université de Blida 1, Blida, Algérie DOI : 10.4194/TRJFAS24434 Viewed : 126 - Downloaded : 112 This study evaluates the performance of a new geomaterial (GEOM) based on sodium montmorillonite clay (Na-Mt), local activated carbon (CAC) and fine powder local cement (Chlef plant western Algeria) to remove ammonia from fish farming in a recirculating aquaculture system. The aqueous ammonium (NH₄ ⁺/NH₃) adsorption efficiency of GEOM was compared with its two principals` constituents (Na-Mt and CAC) and another commercial activated carbon (CAG). The results of X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy were used to assess the chemical and physicochemical properties of studied adsorbents. The maximum adsorption capacity of NH₄ ⁺ on GEOM of about 15.57 mg. g^-1 seems to be similar to that of Na-Mt 16.82 mg. g^-1. The study of solution pH showed that the best NH₄ ⁺/NH₃ removal efficiency was at pH=6 for both GEOM and Na-Mt. The efficiency of GEOM for ammoniacal nitrogen (NH₄ ⁺/NH₃) removal was 79.3% in ultrapure water, 94.05% in seawater and 97.5% in real aquaculture wastewater. Thus, the proposed material, GEOM, can be used as a filter material in a bio-filtration process to treat aquaculture wastewater in a real-world context. Keywords : Recirculating Aquaculture System Ammonium (NH₄ ⁺/NH₃) Geomaterial Adsorption Biofilter