Reduction of Organic Pollutants Present in Wastewater from the Tanneries of La María in the Department of Quindío Using Photo-Fenton

Irma María García Giraldo, Henry Reyes Pineda, Luis Alfonso Salazar

Abstract

Wastewater containing toxic organic pollutants does not comply with the legislation; therefore, there is an urgent challenge in developing efficient oxidation processes that ensure its organic elimination to preserve the water quality in the environment. Fenton and photo-Fenton techniques, which are part of advanced oxidation processes, are currently very innovative and effective for decontaminating organic pollutants in industrial wastewater. That is why we have studied the use of the Fenton reagent (Fe+ 2/ H2O2) and photo-Fenton (Fe+ 2/ H2O2 + Ultraviolet) to apply to wastewater produced by the tanneries. For this, 1L water solutions taken after the wastewater treatment plant were prepared, adjusting the pH to 4.0, then the Fenton reagent was added and stirred for 2 hours at 150 rpm, then these same solutions were exposed to ultraviolet light at 269 nm for 2 hours to perform the photo-Fenton process. Finally, it was possible to obtain better decontamination of these effluents with the photo-Fenton process. In turn, the wastewater turbidity decreased by 92%, chemical oxygen demand, total organic carbon, and color also decreased considerably, making this technique sustainable and environmentally friendly to improve the ecosystem and the people's quality of life around these industries.

 

Keywords: tanneries, Fenton, photo-Fenton, wastewater.


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