城市污水厂尾水对受纳河段表层沉积物及氮循环的影响——以南京秦淮河为例  

Impact of municipal wastewater effluent on surface sediments and nitrogen cycling in receiving river:A case study of the Qinhuai River in Nanjing

作　　者：陈明 薛宗璞 侯豪 柏松 陈鑫琪 刘军 刘树阳 周顺 CHEN Ming;XUE Zongpu;HOU Hao;BAI Song;CHEN Xinqi;LIU Jun;LIU Shuyang;ZHOU Shun(Jiangsu Nanjing Environmental Monitoring Center,Nanjing 210098;College of Civil and Transportation Engineering,Hohai University,Nanjing 210098)

机构地区：[1]江苏省南京环境监测中心,南京210098 [2]河海大学土木与交通学院,南京210098

出　　处：《环境科学学报》2025年第3期231-240,共10页Acta Scientiae Circumstantiae

基　　金：国家重点研发计划(No.2022YFC3204400)。

摘　　要：针对城市污水厂尾水对受纳河段表层沉积物影响的问题,本研究于2023年对南京秦淮河干流上的污水厂开展表层沉积物及对应上覆水的系统性监测分析.结果表明:该污水厂尾水流量稳定,相比秦淮河环境本底值,总氮和硝氮年均值分别高2.2倍和3.3倍,氨氮、总磷、溶解态总磷和有机质含量分别为本底值的14.6%、42.7%、42.5%和72.1%.尾水的水文和理化性质造成距离污水厂排口越近,受纳河道表层沉积物的总氮、总磷和有机质含量越低.受尾水理化性质的影响,相比秦淮河环境本底值,受纳河段硝化速率提高2.2倍,反硝化速率下降46.5%,易造成富营养化问题,对于流域中氮的去除有不利影响.本文探究了受污水厂尾水影响显著的河道表层沉积物的特征和氮循环规律,可为城市水生态系统的可持续发展和污染控制措施的优化提供参考.This study assessed the impact of municipal wastewater treatment plant effluent on surface sediments in the Qinhuai River,Nanjing.In 2023,monitoring revealed that the effluent had higher total nitrogen(2.2 times)and nitrate nitrogen(3.3 times)compared to background levels,while ammonia nitrogen(14.6%),total phosphorus(42.7%),dissolved total phosphorus(42.5%),and organic matter(72.1%)were significantly lower.These effluent characteristics led to reduced total nitrogen,total phosphorus,and organic matter in sediments near the discharge outlet,increased nitrification rates(2.2 times),and decreased denitrification rates(46.5%).The findings highlight the influence of effluent on sediment nitrogen cycling and provide guidance for urban water ecosystem management and pollution control.

关 键 词：城市污水厂 尾水 河流 表层沉积物 氮循环 

分 类 号：X52[环境科学与工程—环境工程] X832