人民长江2025，Vol.56Issue(4)：82-89,98,9.DOI:10.16232/j.cnki.1001-4179.2025.04.011
典型河流磷组分溯源方法研究
Source tracking methodology for phosphorus fractions in typical rivers
摘要
Abstract
As the primary pollutant in the Changjiang River Basin,phosphorus has a wide range of pollution sources and a com-plex composition,making it difficult to achieve accurate source tracing.Focusing on the Gaogang Port area of Taizhou City,we an-alyze the compositional characteristics of phosphorus in typical tributaries and estuaries discharging into the Changjiang River.Through phosphorus speciation analysis,3 D fluorescence spectroscopy,and high-resolution mass spectrometry(HRMS),coupled with a Principal Component Analysis-Absolute Principal Component Score-Multiple Linear Regression(PCA-APCS-MLR)model,we systematically identify phosphorus sources and their spatiotemporal distribution patterns.The results showed that:①The disturbance on bottom sediments by wind waves and ships navigation,which led to an increase in particulate phosphorus near the shore,was the main factor contributing to the recent rise in total phosphorus at the research area.② The orthophosphate con-centration showed a slight change along the area,indicating a low potential of industrial pollution.③ The fluorescent materials in the watershed were predominantly humus,showing a high degree of pollution homogeneity.④ With the use of high-resolution mass spectrometry to accurately analyze the characteristic fingerprints of organic phosphorus,the PCA-APCS-MLR pollution source contribution model was constructed,and it was concluded that domestic wastewater,material chemicals,agriculture,phar-maceutical chemicals,other industrial pollution and other sources contributed 47％,5％,3％,1％,1％ and 43％ to the total phos-phorus pollution,respectively.The main sources of phosphorus at the Gaogang Port were bottom sediments and nearshore inputs.By analyzing the compositional characteristics of phosphorus at the estuaries of typical tributaries flowing into the Changjiang River and constructing a PCA-APCS-MLR model to quantify the source tracing technology of total phosphorus pollution,this study provides a reference for source tracing phosphorus in rivers.关键词
总磷/污染特征/溯源/污染贡献/PCA-APCS-MLR模型/高港码头/长江Key words
total phosphorus/pollution characteristics/tracing source/pollution contribution/PCA-APCS-MLR model/Gaogang Port/Changjiang River分类
资源环境引用本文复制引用
吴萍,薛军,王梦竹,戴君伟,张满成,尤本胜..典型河流磷组分溯源方法研究[J].人民长江,2025,56(4):82-89,98,9.基金项目
江苏省生态环境科研项目(2022019) （2022019）
国家重点研发计划项目(2023YFC3208705) （2023YFC3208705）
生态环境部长江中下游水生态健康重点实验室自主科研课题(AEHZK2024001) （AEHZK2024001）
