【摘要】 以中山市西江水源水体为研究对象,分析了原水中溶解性有机物（DOM）的分子质量分布特征;同时,利用XAD型树脂逐级将DOM分离成强疏水性（HP）、弱疏水性（TP）和亲水性（HL） 3种组分,考察了原水中有机物的亲疏水性分布以及各有机组分对应的SUVA₂₅₄和消毒副产物生成潜能（DBPFP）。结果表明,原水中溶解性有机物的分子质量主要集中在3～5 ku区间,占比在35%以上、最大达到了73%,其次是分子质量<3 ku的区间;原水中的DOM主要为亲水性有机物;疏水性有机物是最主要的氯化消毒副产物前体物;另外,SUVA₂₅₄值与比消毒副产物生成潜能（SDBPFP）呈低度正相关,不能简单地用SUVA₂₅₄值来反映水体中DOM的消毒副产物生成能力。更多还原

【Abstract】 The molecular weight （MW） distribution characteristics of dissolved organic matters （DOM） in Xijiang raw water in Zhongshan were investigated. In addition,XAD resins were used to isolate DOM into strongly hydrophobic,weakly hydrophobic and hydrophilic components. The distribution of hydrophilic and hydrophobic components of organic matters in the raw water was investigated,and disinfection by-products formation potential （DBPFP） and SUVA₂₅₄ of the three corresponding components were evaluated. MW of the DOM in raw water mainly distributed in 3-5 ku which accounted for over 35% and up to a maximum of 73% of the total DOM,followed by the range of MW < 3 ku.Moreover,hydrophilic organic matters were the dominant component of DOM in raw water, and hydrophobic organic matters were found to be the main disinfection by-products precursors. In addition,SUVA₂₅₄ had a low positive correlation with the specific disinfection by-products formation potential （SDBPFP）,which could not simply be used to reflect the formation capacity of disinfection by-products of DOM in raw water.更多还原