Evsel Atıksuların Solar TiO2 Fotokatalizi ile Dezenfeksiyonu

Year 2018, Volume: 3 Issue: 2, 39 - 46, 15.10.2018

Burcu Şengül , Ufuk Alkan

Abstract

Atıksu dezenfeksiyonunun temel amacı, deşarjlar sonucu, yüzeysel sulara
patojenlerin ulaşmasının önlenmesi ve böylece, halk sağlığının korunmasıdır.
Atıksu dezenfeksiyonunda kullanılan klasik yöntemlerin, yan ürün oluşumu,
yüksek enerji gereksinimi ve yüksek maliyet gibi dezavantajları bulunduğundan,
son çalışmalar, güneş ışığına dayalı ileri oksidasyon prosesleri üzerine
yoğunlaşmıştır. Hidroksil radikallerinin oluşumuna dayanan bu prosesler,
sulardaki pek çok kirleticinin ve mikroorganizmanın gideriminde
kullanılmaktadır. Ayrıca, güneş ışığı kullanıldığı için, bu prosesler, çevreye
dost olarak nitelendirilebilir. Bu çalışmada, ileri oksidasyon proseslerinden
olan solar TiO₂ fotokatalizi ile evsel atıksuların dezenfeksiyonu
incelenmiştir. Sentetik evsel atıksuların dezenfeksiyonu, solar ışık altında,
farklı TiO₂ konsantrasyonlarında (0-0,3-0,5-1-5-10 mg/L)
incelenmiştir. Solar TiO₂ fotokatalizinin evsel atıksulardan E.coli
ve E.faecalis gideriminde etkili olduğu belirlenmiştir. E.coli
için elde edilen giderim verimleri, E.faecalis’e göre daha yüksektir. Bu
fark, en belirgin şekilde, 0,5 mg/L TiO₂ konsantrasyonu için
gözlenmiş olup, 60 dk.’da E.coli
için elde edilen giderim, 5,45-log iken, E.faecalis için elde edilen
giderim 3,80-log olarak bulunmuştur.

Keywords

Dezenfeksiyon, Evsel atıksu, Solar, TiO2 fotokatalizi

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