Sulardan Humik Asit Gideriminde Demir Kaplı Zeolitle (DKZ) Katalitik Ozonlama

Abstract

Bu çalışmada hidrojen peroksit ve demir kaplı zeolitle katalitik ozonlama ile humik asit giderimi incelenmiştir. Sonuçlar çözünmüş organik karbon (ÇOK), UV254, SUVA254 (254 nm'de (spesifik Ultraviyole absorbansı) ve renk absorbansı (A436) parametreleri ölçülerek değerlendirilmiştir. 60 dakikada pH 6.5'da 10 mg/L ozon konsantrasyonunda yalnız başına ozonlama ile %21,4 ÇOK giderimi elde edilirken demir kaplı zeolitle (0,75 mg/L) katalitik ozonlama deneylerinde %62 ÇOK giderimi elde edilmiş, katalitik ozonlama sistemine 1 mg/L hidrojen peroksit ilavesiyle de (%64,6 ile ) çok hafif bir artış gözlenmiştir. katalitik ozonlama yalnız başına ozonlamaya kıyasla UV absorplayan aromatik yapının parçalanmasına katkıda bulunmuş ve ÇOK giderimini de iyileştirmiştir ancak katalitik ozonlama sistemlerinde ozon konsantrasyonunun artışı giderim veriminde kayda değer bir artış sağlamamıştır.

Keywords

• Hümik asit,ozonlama,hidrojen peroksit,katalitik ozonlama

Catalytic Ozonation for The Removal of Humic Acid in Water with Iron Coated Zeolite (ICZ)

Abstract

This study examined the catalytic ozonation of humic acid (HA) with iron coated zeolite (ICZ) and hydrogen peroxide (H₂O₂). The results were evaluated by DOC that specify organic matter, UV₂₅₄, SUVA₂₅₄ (Specific Ultraviole Absorbance at 254 nm), and A₄₃₆. When ozonation was used alone, DOC removal was obtained as 21.4% at ozone concentration of 10 mg/L, pH 6.50 and oxidation time of 60 min. DOC removal was found to increase by the the addition of H₂O₂ in ozonation process. The use of ICZ as catalyst increased the decomposition of humic acid compared to ozonation alone. DOC removal efficiency was obtained as 62.0% at pH 6.5, at  catalyst loading of 0.75 g/L, and oxidation time of 60 min. In catalytic ozonation process DOC removal slightly incresed, when H₂O₂ was added. 64.6% DOC removal was obtained at ozone concentration of 10 mg/L, catalyst dosage of 0.75mg/L and H₂O₂ concentration of 1 mg/L. The catalytic ozonation enhanced the destruction of the aromatic and UV-absorbing structures compared with ozonation alone. However, increasing ozone concentrations did not increase removal efficiencies significantly in the catalytic ozonation processes.

Keywords

• Humic acid,ozonation,hydrogen peroxide,catalytic ozonation

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