2018—2019年自贡市生活源氮负荷特征  

作　　者：刘华 周鑫 冯闵佳 胡蕴明 叶建桥 陈春坛 符东 

机构地区：[1]四川文理学院化学化工学院,四川达州635000 [2]四川省达州生态环境监测中心站,四川达州635000

出　　处：《环境保护与循环经济》2025年第1期73-77,共5页environmental protection and circular economy

基　　金：达州市科技计划项目(22ZDYF0048,22ZDYF0057);四川省生态环境保护计划项目(2023HB32);绿色催化四川省高校重点实验室开放课题(LYJ2201);乡村低成本环境治理技术四川省高校重点实验室开放课题(XCH2023ZB-08);中庚工程技术有限公司达州分公司委托项目(2024HX029)。

摘　　要：氮污染是影响水体水质的一个重要污染因素,全面分析生活源氮负荷特征,对治理此类面源污染有着重要参考作用。依据产污系数法、灰水足迹理论以及对现有环境基础资料的调研,对自贡市的生活源氮负荷进行定量分析评价。结果表明:自贡市2018年的氮负荷量为1514.03 t,其中氮负荷在300 t以上的为富顺县和荣县,分别为539.24,372.69 t。氮负荷在100~300 t的为贡井、大安和沿滩3个城区,100 t以下的仅有自流井区。2019年自贡市的氮负荷降至1488.15 t,各区县氮负荷均在下降,其中自流井区下降幅度最大,为4.4%,大安区下降幅度最小,为0.9%,其余区县下降幅度在1%~3%。自贡市的氮污染源灰水足迹荷载系数由2018年的0.86上升至2019年的0.99,表明当地的淡水资源压力在逐步增加。Nitrogen pollution is an important pollution factor affecting water quality,so a comprehensive analysis of nitrogen load characteristics of domestic sources can be an important reference for the treatment of non-point source pollution.Based on pollutant-generation coefficient method,grey water footprint theory and investigation of the existing environmental basic data,the nitrogen load of living sources of Zigong City was quantitatively analyzed and evaluated.The results show that the nitrogen load of Zigong City in 2018 was 1514.03 tons,of which the nitrogen load above 300 tons was Fushun county and Rongxian county,which were 539.24 tons and 372.69 tons respectively.The nitrogen load in Gongjing district,Da'an district,and Yantan district is between 100-300 tons,while only the Ziliujing district has a nitrogen load of less than 100 tons.In 2019,the nitrogen load in Zigong City fell to 1488.15 tons,and the nitrogen load in all districts and counties was decreasing,of which the Ziliujing district had the largest decline of 4.4%,the Da'an district had the smallest decline of 0.9%,and the rest of the districts and counties had the decline between 1% and 3%.The grey water footprint load coefficient of nitrogen pollution sources in Zigong City has increased from 0.86 in 2018 to 0.99 in 2019,indicating that the freshwater resources pressure on local is gradually increasing.

关 键 词：氮负荷 灰水足迹 生活源 自贡市 

分 类 号：X824[环境科学与工程—环境工程]