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管网末梢水中DOM分布特征及影响因素

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唐洋, 马霞, 冯民权. 管网末梢水中DOM分布特征及影响因素[J]. 环境工程学报, 2018, 12(9): 2530-2539. doi: 10.12030/j.cjee.201803056
引用本文: 唐洋, 马霞, 冯民权. 管网末梢水中DOM分布特征及影响因素[J]. 环境工程学报, 2018, 12(9): 2530-2539. doi: 10.12030/j.cjee.201803056
shu
TANG Yang, MA Xia, FENG Minquan. Distribution characteristics and influence factors of DOM in terminal tap water[J]. Chinese Journal of Environmental Engineering, 2018, 12(9): 2530-2539. doi: 10.12030/j.cjee.201803056
Citation: TANG Yang, MA Xia, FENG Minquan. Distribution characteristics and influence factors of DOM in terminal tap water[J]. Chinese Journal of Environmental Engineering, 2018, 12(9): 2530-2539. doi: 10.12030/j.cjee.201803056
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管网末梢水中DOM分布特征及影响因素

  • 1.

    西安理工大学水利水电学院省部共建西北旱区生态水利国家重点实验室，西安 710048

  • 基金项目:

    国家自然科学基金资助项目（51679191）

Distribution characteristics and influence factors of DOM in terminal tap water

  • 1.

    State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China，Institute of Water Resources and Hydro-Electric Engineering，Xi'an University of Technology，Xi'an 710048，China

  • Fund Project:

  • 摘要: 为探明长期运行的供水管网末梢出水的溶解性有机物（DOM）分布特征及影响因素，采用三维荧光技术结合平行因子分析法（PARAFAC）对西北某高校管网水质进行了研究，并利用荧光区域积分（FRI）法得到各类DOM占比，通过实验揭示了加氯与DOM的相互关系。结果表明：该区域管网水中DOM主要为溶解性微生物副产物（SMP）、富里酸类（fulvic acid-like）和腐殖酸类（humic acid-like）有机物；DOM平均相对浓度约为2.0×106 AU·nm2，其中类蛋白有机物较少，SMP占30%~34%、富里酸类占23%~25%、腐殖酸类占25%~28%；铸铁管出水中SMP总量（80 643 AU·nm2）和占比（34%）比不锈钢管出水中的SMP总量（72 420 AU·nm2）和占比（30%）有所升高；加氯对腐殖质类有机物具有一定的去除效果，且在前10 min内去除率最高。研究结果可为供水管网水质维护和加氯机制提供理论依据。
    Abstract: For the exploration of distribution characteristics and influence factors of dissolved organic matter (DOM) in the long-running water supply pipe networks terminal tap water, a three-dimensional fluorescence technique in combination with parallel factor analysis (PARAFAC) was applied to the research of water quality of pipe networks of a university in China’s northwest region, with the proportion of various DOM obtained by the fluorescence regional integration (FRI) and the relationship between chlorination and DOM revealed through experiments. The results showed that DOM are mainly soluble microbial by-products (SMP), fulvic acid-like, and humic acid-like in the water networks of this area. Besides, the average relative concentration of DOM is about 2.0×106 AU·nm2, in which the protein-like are less, SMP is from 30% to 34%, fulvic acid-like occupies 23% to 25% and humic acid-like occupies 25% to 28%. In addition, the total amount of SMP in water from cast iron pipe (80 643 AU·nm2) and the proportion (34%) are higher than the total amount of SMP (72 420 AU·nm2) and the proportion (30%) in water from stainless steel tube. Furthermore, chlorination has a certain removal effect on the humic substances with the highest removal rate in early 10 minutes. The results of study will provide theoretical basis for water quality maintenance and chlorination mechanism in water supply networks.
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  • 刊出日期:  2018-09-20

管网末梢水中DOM分布特征及影响因素

  • 1. 西安理工大学水利水电学院省部共建西北旱区生态水利国家重点实验室，西安 710048
基金项目:

国家自然科学基金资助项目（51679191）

摘要: 为探明长期运行的供水管网末梢出水的溶解性有机物（DOM）分布特征及影响因素，采用三维荧光技术结合平行因子分析法（PARAFAC）对西北某高校管网水质进行了研究，并利用荧光区域积分（FRI）法得到各类DOM占比，通过实验揭示了加氯与DOM的相互关系。结果表明：该区域管网水中DOM主要为溶解性微生物副产物（SMP）、富里酸类（fulvic acid-like）和腐殖酸类（humic acid-like）有机物；DOM平均相对浓度约为2.0×106 AU·nm2，其中类蛋白有机物较少，SMP占30%~34%、富里酸类占23%~25%、腐殖酸类占25%~28%；铸铁管出水中SMP总量（80 643 AU·nm2）和占比（34%）比不锈钢管出水中的SMP总量（72 420 AU·nm2）和占比（30%）有所升高；加氯对腐殖质类有机物具有一定的去除效果，且在前10 min内去除率最高。研究结果可为供水管网水质维护和加氯机制提供理论依据。

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