Review on the main advances in photo-Fenton oxidation system for recalcitrant wastewaters

This paper reviews the main advances in photo-Fenton oxidation treatment for recalcitrant wastewaters. This oxidation method is able to produce biodegradable intermediates and mineralize such pollutants effectively when the main operational conditions are at optimum level. However, cost of the process is one of the main limitations. Several strategies have been put in practice to minimize cost and improve photo-Fenton efficiency primarily through application of heterogeneous catalysts and/or chelating agents. In addition, cost can be further reduced by applying solar energy and integrating biological treatment technologies in the treatment process.

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