DİLEK ŞAHİN, MERYEM ÖZ, Eda SERTAŞI, ÜNAL ÖZ, ZAFER KARSLI, MUSTAFA ORHAN ARAL

Adsorption Process of Ammonium by Natural Zeolite (Clinoptilolite) from Aqueous Solution for Aquaculture Application

Ammonia is an important nutrient in primary production, but high ammonia concentration is directly or indirectly toxic to many species of aquatic organisms. Ammonia and other toxic metabolites can be managed by adsorption and ion exchange. Zeolite is naturally occurring structured, aluminosilicate with high cation exchange and ion adsorption capacity. The purpose of this study was to determine the effects of zeolite on the ammonium adsorption at different particle sizes (0.075 mm, 3-5 mm) and adsorbent dosages (5 g/l, 10 g/l, 15 g/l) from aquatic solution. This research was conducted by trial groups with 3 repetitions during 330 min. Water temperature, pH, dissolved oxygen and ammonium values were measured during the trial period at regular intervals. Depending on the relevant literature, TAN (Total Ammonium Nitrogen) and adsorption efficiency were also calculated. This study values showed a decrease of TAN concentration in all the groups with increasing contact time. For different particle size and adsorbent dosage of zeolite, the best efficiency (44.1%) is determined at added 15 g/l and 0.075 mm zeolite group (P˂0.05). Our results revealed that zeolite might be used for ammonia removal in aquaculture.

Su Ürünlerinde Doğal Zeolit (Klinoptilolit) ile Amonyum Adsorpsiyonu

Amonyak, birincil üretimde önemli bir besin maddesidir, ancak yüksek amonyak konsantrasyonu, birçok sucul organizma türüne doğrudan veya dolaylı olarak toksiktir. Amonyak ve diğer toksik metabolitler adsorpsiyon ve iyon değişimi ile yönetilebilir. Zeolit doğal olarak oluşan, yüksek katyon değişimi ve iyon adsorpsiyon kapasitesine sahip bir alüminosilikattır. Bu çalışmanın amacı, farklı partikül büyüklüğü (0,075 mm, 3-5 mm) ve adsorbant miktarına (5 g/l, 10 g/l, 15 g/l) bağlı olarak zeolit ile sucul ortamdan amonyum adsorpsiyonunun sağlanmasıdır. Araştırma, 3 tekerrürlü deneme grupları üzerinden 330 dakika boyunca yürütülmüştür. Deneme süresi boyunca, düzenli aralıklarla su sıcaklığı, pH, çözünmüş oksijen ve amonyum değerleri ölçülmüş, TAN (Toplam Amonyum Azotu) ve adsorpsiyon verimi ilgili literatüre bağlı olarak hesaplanmıştır. Çalışma değerleri artan temas süresi ile tüm gruplarda TAN konsantrasyonunun azaldığını göstermiştir. Zeolitin farklı partikül büyüklüğü ve adsorbant miktarı için en iyi verim (% 44,1) 15 g/l ve 0,075 mm zeolit grubunda belirlenmiştir (P˂0,05). Sonuç olarak, zeolitin su ürünleri yetiştiriciliğinde amonyak giderimi için kullanılabileceği belirlenmiştir.

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