CAJ | 학술논문

通过室内模拟试验,研究了水体冻结过程中,水体中溶解性有机物(DOM)和卤乙酸前体物在水-冰体系中的分配规律.按照 DOM 在XAD 树脂上的吸附特性将其分为5个部分：疏水性有机酸(HPO-A),疏水性中性有机物(HPO-N),过渡亲水性有机酸(TPI-A),过渡亲水性中性有机物(TPI-N)和亲水性有机物(HPI).结果表明：在水体冻结过程中,5种DOM组分在水相中的DOC浓度均随冷冻时间的增长而增加,呈现冷冻浓缩效应.与溶解性有机碳(DOC)所表征的整体有机物相比,5种 DOM 组分中的卤乙酸(HAAs)前体物更倾向于停留在水相中浓缩.在5种DOM组分中,HPI是主要的HAAs前体物.5种DOM组分在未冻结水中的UV-254与HAAFP均表现出一定相关性,其中HPO-A, TPI-A和HPI的UV-254与HAAFP达到极显著水平.然而在融冰水中,这5种DOM组分的UV-254与HAAFP的相关性均不显著.
통과실내모의시험,연구료수체동결과정중,수체중용해성유궤물(DOM)화서을산전체물재수-빙체계중적분배규률.안조 DOM 재XAD 수지상적흡부특성장기분위5개부분：소수성유궤산(HPO-A),소수성중성유궤물(HPO-N),과도친수성유궤산(TPI-A),과도친수성중성유궤물(TPI-N)화친수성유궤물(HPI).결과표명：재수체동결과정중,5충DOM조분재수상중적DOC농도균수냉동시간적증장이증가,정현냉동농축효응.여용해성유궤탄(DOC)소표정적정체유궤물상비,5충 DOM 조분중적서을산(HAAs)전체물경경향우정류재수상중농축.재5충DOM조분중,HPI시주요적HAAs전체물.5충DOM조분재미동결수중적UV-254여HAAFP균표현출일정상관성,기중HPO-A, TPI-A화HPI적UV-254여HAAFP체도겁현저수평.연이재융빙수중,저5충DOM조분적UV-254여HAAFP적상관성균불현저.
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.