Abstract
The performance and mechanism of manganate preoxidation process for organics removal were investigated in the present paper. The results showed that manganate was a potentially powerful oxidizing agent and could make the natural organic matter (NOM) concentration of sample solution increase. The process of manganate in combination with ferrous sulphate (FeMnO) was effective for organics removal and with the highest removal rate of 89% when the FeMnO dose was 0.18 mmol/L. The fluorescence analysis showed that the fluorescence intensity values related to hydrophobic acids and model humic acid polymers were the highest and the relative position of the main peak fluorescence intensity was shifted towards lower emission wavelengths, which indicated the reduction in the degree of aromaticity of residual organic matter fraction.
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