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| Degradation of Fulvic Acid and Advanced Treatment of Landfill Leachate by Catalytic Ozonation in Continuous Flow Mode |
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| KeyWord:catalytic ozonation; Co-Mn-O; fulvic acid; landfill leachate; continuous flow mode |
| Author Name | Affiliation | | ZHOU Wen-min | College of Chemistry and Life Sciences, Zhejiang Normal University
Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences | | FU Jian-rong | Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences | | AN Wen-hao | Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences | | XIAO Hua | Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences | | YU Man | Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences | | XU Yu-xin | Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences |
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| Abstract: |
| Firstly, UV-vis spectrum and TOC value of samples during catalytic ozonation of fulvic acid（FA） in semi-continuous mode were determined. The results suggested that with the progress of reaction, the characteristic peak in the ultraviolet region decreased rapidly and TOC removal efficiency gradually increased. It was demonstrated that unsaturated groups in the molecule of FA were degraded quickly into intermediates which was converted into carbon dioxide finally. The effect of technical parameters on catalytic ozonation of FA in continuous flow mode was studied. The main parameters included hydraulic retention time（HRT）, catalyst dosage, and Height to Diameter Ratio of reactor（H/D）. The results proved that the increase of HRT, catalyst dosage, and H/D of reactor were helpful to improve degradation efficiency of FA. Considering cost-effectiveness, the appropriate parameters were HRT 58 min, catalyst dosage 0.5 g·L-1, and H/D 6.5∶1 respectively. The test results in advanced treatment of landfill leachate by catalytic ozonation showed that the degradation efficiency of organic pollutants in landfill leachate was much high. After pretreatment to remove chloride ions and alkalinity in tailwater of landfill leachate, the chromaticity of the landfill leachate was completely removed and the removal efficiency of CODCr was nearly 80% by catalytic ozonation in continuous flow mode. |
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