Sıfır Değerlikli Mangan ve Ultrases ile Nitratın Denitrifikasyonu

Abstract

Bu çalışmada, sıfır değerlikli mangan (Mn⁰) partikülü ve ultrases prosesinin (US) tekli ve birleşik (US/Mn⁰) uygulamaları sentetik ve yeraltı suyunda bulunan nitratın indirgenmesinde denenmiş ve partikül dozu (0.5, 0.75, 1, 1.5 ve 2 gr) ile reaksiyon süresinin (0-60 dk) etkisi araştırılmıştır. Ultrases prosesi tek başına uygulandığında nitrat (NO₃^-) giderimine etkisi az iken; Mn⁰ dozu arttıkça NO₃^- giderimi yükselmiştir. Birleşik US/Mn⁰ uygulamasında ise ultrases etkisiyle Mn⁰ partiküllerinin denitrifikasyon kapasitesini arttırdığı belirlenmiştir. Sadece Mn⁰ ile 60 dk sonunda % 70 civarında bir NO₃^- giderimi gerçekleşirken, aynı deneysel şartlarda ultrasonik mekanik kuvvet etkisi ile 30 dk içerisinde % 95 civarında bir NO₃^- giderimi elde edilmiştir. US/Mn⁰ ile nitratın indirgenmesi sonucu nitrit (NO₂^-) ve amonyum/amonyak (NH₄⁺/NH₃) denitrifikasyon bileşikleri az miktarda oluşurken, azot gazına (N₂) dönüşüm oranının arttığı tespit edilmiştir.

Keywords

• Denitrifikasyon,nitrat,sıfır değerlikli mangan,ultrases

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