Abstract
The effects of the photochemical pre‐treatment by using a pilot‐plant UV/H2O2 process on the biodegradability of aqueous linear alkylbenzene sulfonate (LAS) were studied. It was observed that the photochemical pre‐treatment of the LAS solutions by UV‐254/H2O2 increased the biodegradability of LAS solutions. Aqueous solutions with higher concentrations of LAS (> 100 mg/L) were non‐biodegradable. The ratio of BOD5/COD of the pre‐treated LAS solutions was increased, indicating that the pre‐treated LAS solutions were more biodegradable. This ratio was improved as the LAS solutions were more pre‐treated. Also, the biodegradability factor for the pre‐treated LAS solutions was increased as the time of the photochemical pre‐treatment was increased.
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