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Recently it was reported that potato pulp, a side product of starch industry, is potentially applicable for the decontamination of phenol-polluted wastewater, due to its high peroxidase content. Regarding the toxicity and the persistence in the environment, the phenol is surpassed by its chlorinated derivatives, such as 2,4-dichlorophenol (2,4-DCP). In this study we demonstrated that potato pulp may be used for the decontamination of 2,4-DCP solutions in a peroxidase-catalyzed reaction. Due to its peroxidase activity, potato pulp displayed a very high potential for 2,4-DCP removal, with the reaction’s efficiency reaching 98% under optimal conditions. The peroxidase activity towards 2,4-DCP was maintained over a wide temperature and pH range, and characterized by relatively low HO demand, with respect to other peroxidase-based systems of 2,4-DCP removal. The toxicity of the post-reaction solutions was compared to the toxicity of the unreacted 2,4-DCP solutions using phytotest and the MTT test. The results of both tests proved that the 2,4-DCP toxicity was effectively alleviated if the pollutant was depleted from solution in the course of the incubation with potato pulp and HO.

Potato Pulp as the Peroxidase Source for 2,4-Dichlorophenol Removal