Abstract
Abstract
Decolorization and organics removal in palm oil mill effluent (POME) were investigated with the Fenton process. Decolorization efficiency obtained was 66.5% at 5 min and >90.0% at 30 min of reaction time. The process removed 82.0% of soluble chemical oxygen demand at 1 h of reaction time with optimized conditions: [H2O2]=50 mM, [Fe2+]=1.0 mM, and pH=3.0±0.2. The kinetics rate constants (k) of decolorization and dissolved organic carbon removal were found at 6.20×10−2 min−1 and 2.19×10−4 (mg/L)−1 min−1, respectively. However, the UV irradiation did not obviously enhance the decolorization and organic removal of POME. Humic and fulvic acid-like substances were identified at Ex/Em of 315/415 and 260/445 nm, respectively. By fluorescence excitation-emission matrix (FEEM), spectroscopy could create colors in POME. Reduction of FEEM intensity was 98.61%, which was related to the decolorization.
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