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.
Source Tracing of Initial Rainwater Runoff Pollutants Based on DOM Fluorescence Spectrum Analysis
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第7期
Page:
133-138
Column:
Date of publication:
2023-04-01
- Keywords:
- initial rainwater; pollution tracing; dissolved organic matter; fluorescence spectrum; parallel factor analysis
- 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%).
Last Update:
2023-04-01