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Degradation of formaldehyde by advanced oxidation processes

2012; Elsevier BV; Volume: 107; Linguagem: Inglês

10.1016/j.jenvman.2012.04.024

1095-8630

José Roberto Guimarães, Carolina Rittes Turato Farah, Milena Guedes Maniero, Pedro S. Fadini,

Air Quality Monitoring and Forecasting

The degradation of formaldehyde in an aqueous solution (400 mg L−1) was studied using photolysis, peroxidation and advanced oxidation processes (UV/H2O2, Fenton and photo-Fenton). Photolysis was the only process tested that did not reduce formaldehyde concentration; however, only advanced oxidation processes (AOPs) significantly decreased dissolved organic carbon (DOC). UV/H2O2 and photo-Fenton AOPs were used to degrade formaldehyde at the highest concentrations (1200–12,000 mg L−1); the processes were able to reduce CH2O by 98% and DOC by 65%. Peroxidation with ultraviolet light (UV/H2O2) improved the efficiency of treatment of effluent from an anatomy laboratory. The effluent's CH2O content was reduced by 91%, DOC by 48%, COD by 46% and BOD by 53% in 420 min of testing.