| We investigated the removal of organic matters with different molecular weight(MW) and HAAs formation potential composed of organic matters with different MW in the two processes of O3/BAC and micro-aeration/BAC, and discussed the characteristic of forming HAAs by organic matters with different MW. The results indicated that more than 90% of organic matters with >30×103 molecular weight could be removed in the process of O3/BAC. In the water treated by the two processes of O3/BAC and micro-aeration/BAC, the percentage of organic matters with <1×103 MW exceeded 50%, 10103～30×103MW was in 20～30% based on UV254 value as token of organic matters. And the HAAs generated by the organic matters with <1×103 MW occupied the main fraction, and the concentration of DCAA, TCAA and DBAA in the tow processes was 97.00、38.55、2.10μg/L和104.00、42.75和2.92μg/L. Finally, UV254 as one of surrogate parameters for HAAs formation potential was proposed because of the better linear fitting correction coefficient between UV254 and DCAA, TCAA, DBAA and THAAs, that is 0.827、0.8513、0.8157and 0.878. |
