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阿哈水库DOM的分离及其对消毒副产物的贡献
王志康,韩月,苟攀,尹海晓,王铭,周国永,兰彬彬,等
作者单位E-mail
王志康 贵州民族大学 wzk_gzmz@163.com 
韩月 贵州民族大学  
苟攀 贵州民族大学  
尹海晓 贵州民族大学  
王铭 贵州民族大学  
周国永 贵州民族大学  
兰彬彬 贵州民族大学  
摘要:
为研究高原喀斯特湖库DOM(Dissolved Organic Matter,溶解性有机质)的组成及其化学特征对DBPs(Disinfection By-products,消毒副产物)生成路径的影响,以西南喀斯特地区贵阳市阿哈水库的DOM为研究对象,结合XAD大孔树脂分离技术,通过化学表征〔包括紫外-可见光光谱(UV-Vis)、红外光谱(FTIR)和三维荧光光谱(3D-EEM)〕手段来研究各组分对C-DBPs(含碳消毒副产物)和N-DBPs(含氮消毒副产物)的生成贡献。不同组分芳香性的大小依次为:HON (憎水中性物)> HIB(亲水碱)> HOA(憎水酸)> HIN(亲水中性物)≈HIA(亲水酸)> HOB(憎水碱)。憎水与亲水DOM的DBPs生成潜能相近。其中,HON最高,其次为HIB和HOA。HIB和HOA的主要卤代反应位分别来源于藻类有机物的蛋白质和富里酸,而HON的DBPs生成潜能的贡献主要为分子中的芳香和共轭不饱和结构。HIA和HIN的构成主要为脂肪烃,贡献较低的DBPs的生成潜能。对于C-DBPs,THMs和HAAs的生成潜能总体相近,不同组分的差异明显。对于N-DBPs,卤乙腈的生成潜能占80%以上,憎水DOM的贡献较高。DBPs的生成路径从UV-Vis、FTIR和3D-EEM的官能团和特征峰解析结果中均得到了较好的响应。
关键词:  高原喀斯特湖库  DOM  亲疏水性  消毒副产物  XAD大孔树脂  生成潜能
DOI:
分类号:
基金项目:贵州省科技厅-贵州民族大学联合基金项目(黔科合LH字[2014]7383);贵州省科技厅基础研究项目(黔科合基础[2016]1071,黔科合基础[2016]1072)
The Fraction of DOM and their Contribution to the Disinfection By-products Formation: a Case Study in Aha Reservoir
Wang Zhikang,et al
Abstract:
This paper investigates the relationship between disinfection by-products (DBPs) formation pathways and components with various chemical characteristics of dissolved organic matter (DOM) in a Karst plateau reservoir: Aha Lake in Guiyang. Using DOM obtained from the reservoir, several chemical characterization approaches, including UV-Vis scanning, FTIR, and 3D-EEM fluoresce, were applied to investigate the potential contribution of different DOM fractions (separated by XAD resin) in the generation of the carbonaceous and nitrogenous DBPs (C-DBPs and N-DBPs).The results indicated that the aromaticity of different DOM fractions followed in the decreasing order: hydrophobic neutral (HON) > hydrophilic base (HIB) > hydrophobic acid (HOA) > hydrophilic neutral (HIN) ≈ hydrophilic acid (HIA) > hydrophobic base (HOB). Both hydrophilic and hydrophobic fractions possessed similar DBP formation potentials (DBPFPs). In detail, HON had the highest DBPFP, followed by HIB and HOA. The majority of halogenated active sites in HIB and HOA originated from protein in algal organic matter and fulvic acid, while the DBPFP of HON is likely responsible for its high aromatic and unsaturated structures. The decreasing DBPFP corresponded with elevated aliphatic hydrocarbon structures found in HIN and HIA. For C-DBPs, less differences were observed for THMs and HAAs of all DOM fractions. Haloacetonitriles accounted for 80% of N-DBPs, which was mainly contributed by hydrophobic parts. The DBP formation pathway was satisfactorily supported from chemical functional groups and characteristic peaks by UV-Vis, FTIR, and 3D-EEM, respectively.
Key words:  Karst Plateau Reservoir  Dissolved organic matters  Hydrophilic and hydrophobic properties  Disinfection by-products  XAD resin  Formation potential