Cu^(2+)对HA形态结构与其三卤甲烷生成能力影响的研究  

Effect of Cu^(2+) on HA morphology and its trihalomethane formation potential

作　　者：刘立超 李静 李征[2] 李梦琦 莫小妤 LIU Lichao;LI Jing;LI Zheng;LI Mengqi;MO Xiaoyu(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;China First Design ＆ Research Institute,North China Municipal Engineering Design ＆ Research Institute,Tianjin 300074,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中国市政工程华北设计研究总院第一设计研究院,天津300074

出　　处：《河北工业大学学报》2018年第4期50-54,共5页Journal of Hebei University of Technology

基　　金：河北省高等学校科学技术研究项目(QN2014081)

摘　　要：为研究Cu^(2+)在氯化过程中对腐殖酸(HA)形态结构和其消毒副产物——三卤甲烷生成能力(THMsFP)的影响,考察了Cu^(2+)浓度和反应pH对THMsFP的影响,并采用紫外可见光谱、红外光谱以及超滤膜分级(UF)等方法对有机物进行分析和表征.结果表明:Cu^(2+)在不同pH条件下对THMsFP均有一定的促进作用,其促进作用随pH升高而增强,其中分子量范围在10~30 kDa、30~100 kDa和大于100 kDa的HA受Cu^(2+)的影响最大.这主要是因为:Cu^(2+)首先与HA中带有甲基或亚甲基、酚、醇、醚的芳香环结构发生络合作用,同时也通过该结构加速HA的水解反应,催化HOCl和HOBr与HA发生氧化和取代反应,从而促进THMs的生成.In order to study the effect of Cu^2＋ on the transformation of humic acid （HA） and its trihalomethanes formation potential （THMsFP）, the effects of Cu^2＋ concentration and reaction pH on the formation of THMs were studied, and the UV-visible spectroscopy （UV-Vis）. Fourier infrared spectroscopy （FTIR） and ultra-filtration（UF）were employed to analyze the organic matter during chlorination. The results indicated Cu^2＋ under different pH conditions contributed to the yield of THMsFP, and its effect increased with the increase of pH. Among them, HA within the molecular weight range of 10-30 kDa was affected most by Cu^2＋. This was mainly because Cu^2＋ first interacted with the structures of phenols, alcohols, and earboxyl groups in HA. It also accelerated the hydrolysis reaction of HA through this structure and catalyzed the oxidation and substitution reactions of HOCl and HOBr with HA, thereby promoting the formation of THMs.

关 键 词：CU^2+ 三卤甲烷生成能力(THMsFP) 超滤(UF) 分子量(MW) 

分 类 号：TU991.2[建筑科学—市政工程]