Single and Combined Application of Ozonation and Coagulation/Flocculation for Humic Acid Removal

Humic acids are often found in surface and ground waters as a result of organic matter decay. In this study, water samples containing 50 mgL-1 humic acid were treated by conventional application of coagulation/flocculation technique. The results showed 70% ±10 turbidity, [greater than or equal to]82...

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Bibliographic Details
Published in:Ozone: science & engineering 2018-07, Vol.40 (4), p.321-329
Main Authors: Abdw, Abdelrouf A. G., Doğan, Şifa, Pirgalıoğlu, Saltuk
Format: Article
Language:English
Subjects:
Absorbance
Coagulants
Coagulation
Flocculation
Humic acids
Iron
Organic carbon
Organic matter
Ozonation
Total organic carbon
Turbidity
Water analysis
Water sampling
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Summary:Humic acids are often found in surface and ground waters as a result of organic matter decay. In this study, water samples containing 50 mgL-1 humic acid were treated by conventional application of coagulation/flocculation technique. The results showed 70% ±10 turbidity, [greater than or equal to]82% ±10 UV254 absorbance and 85% ±10 total organic carbon removal under pH 5-9 and above 5 mgL-1 Fe3+ coagulant doses. Application of post-ozonation significantly increased the UV254 absorbance and turbidity removal under low dose Fe3+ application. On the other hand ozonation prior to coagulation/flocculation process altered the structure of HA and caused no significant improvement in removal efficiencies.
ISSN:0191-9512
1547-6545
DOI:10.1080/01919512.2018.1435257