Spectroscopic Characteristics of Mature Leachate During Fenton and H2O2UV Treatment Process

Abstract:

In order to determine the removal rule of different organic matters during mature landfill leachate Fenton treatment and H2O2UV treatment, the three dimensional fluorescence excitationemission matrix (3DEEM) spectroscopy and specific ultraviolet light absorbance at 254 nm (SUVA254) combined with fluorescence regional integration (FRI) EEM data processing method were applied to analyze component evolution characteristics of different organic matters. The results show that both proteinlike compounds rather than humiclike substances, tyrosinelike compounds rather than tryptophanlike compounds are preferentially removed by these two treatment. A greater proportion of the most difficult degradative humiclike substances is removed when TOC removal efficiency is higher. Under similar TOC removal efficiency, the H2O2UV method is more effective to eliminate humiclike substances than the Fenton method, and can eliminate more humicacidlike compounds. In Fenton treatment, more humicacidlike compounds can be precipitated with an increasing dosage of Fe2+. The H2O2UV method should be chosen as the pretreatment method because of its higher humiclike substances removal efficiency in order that not only a better treatment result can be achieved, but also more cost can be saved.