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| Removal of halogenated carbon disinfection by-product 2,6-dichloro-1,4-benzoquinone by ozone and granular activated carbon |
| DING Chun-sheng, MIAO Shi-mao, ZHAO Shi-du, XIAO Mao-hu, ZOU Sheng-nan |
| College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China |
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Abstract 2,6-dichloro-1,4-benzoquinone (abbreviated as 2,6-DCBQ), one kind of disinfection by-products (DBPs) in drinking water has a vital impact on human health. Therefore, the study on the control of 2,6-DCBQ by an integrated ozone-granular activated carbon (O3/GAC) process was made. In addition, the degradation mechanism and its dynamics were analyzed and discussed. The results indicated that the 2,6-DCBQ removal with individual O3 or GAC process reached 29.64% and 32.81% respectively. The 2,6-DCBQ could be removed more effectively by O3/GAC compared to the individual O3 or GAC process, and the efficiency was increased with the raise of initial concentration of 2,6-DCBQ, O3 levels and GAC dosage. It was also found that the 2,6-DCBQ removal reached 85.37% after the reaction time of 90minutes with the initial 2,6-DCBQ concentration, O3 concentration and GAC addition of 20μg/L, 10.06mg/L and 0.5g/L, respectively. The degradation process of 2,6-DCBQ by O3/GAC fit the first-order reaction kinetic model.
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Received: 24 October 2016
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