| Author Name | Affiliation | | GUAN Chun-yu | School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China | | MA Jun | School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China | | LIU Gui-fang | School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China | | SUI Ming-hao | School of Environmental Science and Engineering,Tongji University,Shanghai 200331,China |
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| Abstract: |
| Catalytic ozonation with coal-based activated carbon (carbozone) followed by GAC ( granular activated carbon) filtration was compared with ozone-GAC process for water purification. Songhua River water pretreated with traditional processes was used as influent in the continuous-flow experiments. The carbozone-GAC process performed better than the ozone-GAC process during the 9. 5-months operation period. The organic removal rate in carbozone was found to be very high in the initial operation period,and then gradually decreased to a steady level. At the steady state of operation,the average removal rates of permanganate index ( PI) and UV254 were 25. 8% and 67. 8% in carbozone,and 6. 6% and 53. 7% in ozonation alone,respectively. The carbozone process also achieved a higher DOC removal than ozonation alone,and moreover,the number of semi-volatile organic compounds detected with GC/MS decreased from 44 to 28 in carbozone and 34 in ozonation alone,respectively. The catalyst surface became more acidic during the long-term operation with its pHPZC( pH at which its surface is zero charged) decreased from 7. 0 to 6. 2. In addition,the physical characteristics of the catalyst were also changed during the operation. |
| Key words: activated carbon catalytic ozonation GAC organic matter |
| DOI：10.11916/j.issn.1005-9113.2010.04.023 |
| Clc Number:X52 |
| Fund: |
