Study of Deoxygenation Efficiency on the Presence of Sodium Metabisulfite and Ascorbic Acid

Document Type : Research Article


Department of Civil Engineering, Khavaran Institute of Higher Education, Mashhad, Iran


Dissolved Oxygen (DO) removal can be defined as deaeration or deoxygenation terms in which various methods are used to remove air molecules from water. In this study, sodium metabisulfite and ascorbic acid are experimentally used to deoxygenate Birjand drinking water, Iran and also they are applied for Retention Time (RT), Temperature (T), Hardness (H) and pH variations to measure deoxygenation efficiency. Regarding, findings showed that as RT increased to 100%, DO reduced to almost 60% as well as when T rose about to 10%, has approximately led to 80% reduction of DO concentration. Furthermore, ascorbic acid effects indicated that DO concentration decreased about 40% as T had increased to 10%. In addition, 20% reduction of RT has caused to 25% removal of DO. The effect of pH revealed that alkaline state worked better than acidic state to improve deoxygenation efficiency, as well.


Main Subjects

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