Abstract：It was studied the partition of dissolved organic matter (DOM) fractions and haloacetic acids (HAAs) precursors in water-ice system during the freezing processes of water by the indoor simulating tests. DOM was fractionated using XAD resins into five fractions: hydrophobic acid (HPO-A), hydrophobic neutral (HPO-N), transphilic acid (TPI-A), transphilic neutral (TPI-N) and hydrophilic fraction (HPI). The results showed that the freezing rate of water samples containing acid fractions wove higher than samples containing neutral fractions. DOC concentrations for five DOM fractions in liquid phase increased with freezing time, presenting the freeze-concentration effect, during the freezing processes of water. HAAs precursors were more liable to be concentrated in liquid phase, as compared with the bulk DOM represented by dissolved organic carbon (DOC). HPI, among the five DOM fractions, was the main HAAs precursors. There was significant correlation between UV-254 and HAAFP for five DOM fractions in unfrozen liquid samples. Moreover, for HPO-A, TPI-A and HPI achieved very significant linear correlation. However, there was no significant correlation between UV-254 and HAAFP for all five DOM fractions in melted ice samples.
薛爽, 陈静, 铁梅, 惠秀娟, 张丽娜, 张营. 水体冻结过程中卤乙酸前体物在水-冰体系中的分配研究[J]. 中国环境科学, 2014, 34(11): 2773-2780.
XUE Shuang, CHEN Jing, TIE Mei, HUI Xiu-Juan, ZHANG Li-Na, ZHANG Ying. Ratio of haloacetic acids precursor in water-ice system during the freezing processes of water. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(11): 2773-2780.
