ZHONGJiang-li,SHEN Jie,GAOHua,et al.Source Tracing of Initial Rainwater Runoff Pollutants Based on DOM Fluorescence Spectrum Analysis[J].China Water & Wastewater,2023,39(7):133-138.
基于DOM荧光光谱分析的初期雨水径流污染物溯源
- Title:
- Source Tracing of Initial Rainwater Runoff Pollutants Based on DOM Fluorescence Spectrum Analysis
- Keywords:
- initial rainwater; pollution tracing; dissolved organic matter; fluorescence spectrum; parallel factor analysis
- 摘要:
- 初期雨水污染物质的输入逐渐成为城市地表水体污染的重要来源，对其进行溯源可为源头控制和精细化管理提供依据。为此，考察了HZ市某区域雨水径流中氮、磷、有机碳浓度的变化规律，采用初期冲刷比值FFn分析了其初期效应，结合可溶性有机物（DOM）的荧光光谱平行因子分析（EEM-PARAFAC）与主成分分析（PCA），探究初期雨水污染的主要来源，并利用绝对主成分线性回归法（APCS-MLR）分配来源比例。结果表明，前30%的降雨径流中携带了超过50%的污染负荷（FF30=1.7），径流存在一定的初期效应。初期雨水径流中的磷和有机碳污染主要来自城市绿地（74%和85%），少部分来自居民区（19%和6%）；氮污染也主要来自城市绿地（52%），但有少部分来自生活污水（28%），其中氨氮主要来自生活污水（69%）。
- Abstract:
- The input of initial rainwater pollutants has gradually become an important source of urban surface water pollution. Tracing the source can provide a basis for source control and management. Therefore, this paper investigated the variation law of nitrogen, phosphorus and organic carbon concentrations in rainwater runoff in a region of HZ city, and analyzed the initial effect by using first flushing ratio (FFn). The main sources of initial rainwater pollution were identified by combining the excitation-emission matrix parallel factor analysis (EEM-PARAFAC) and principal component analysis (PCA) of dissolved organic matter (DOM), and the contribution rate of different sources was distributed by using absolute principal components score and multivariate linear regression (APCS-MLR). The first 30% of rainfall runoff carried more than 50% of the first flush load (FF30 of 1.7), and the runoff had a certain first flush effect. The phosphorus and organic carbon pollution in initial rainwater runoff mainly came from urban green space (74% and 85%), and a small part came from residential areas (19% and 6%). The nitrogen pollution also mainly came from the urban green space (52%), and a small part came from domestic sewage (28%), of which ammonia nitrogen mainly came from domestic sewage (69%).
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