摘要
为评估大气污染防治对改善空气质量的有效性。通过比较分析6项常规污染物和水溶性离子质量浓度的变化来评估2018年-2019年期间南宁市空气质量改善效果。结果表明:南宁市环境空气质量总体改善,NO_(3)^(-)、SO _(4)^(2-)、Ca^(2+)、Mg^(2+)、NH_(4)^(+)、K^(+)和Na^(+)等7种离子浓度呈现降低;PMF模型解析结果显示二次硫酸盐、二次硝酸盐和工业与农业源等其他来源对ρ(PM_(2.5))的贡献量均大幅降低,但扬尘和生物质燃烧贡献率分别上升14.4%和9.3%。结果表明仍需加强对生物质燃烧和扬尘的管控力度。
It is necessary to evaluate changes of air pollutants to understand effectiveness of air-pollution control on improving air quality.Air conditions in Nanning city was evaluated by comparing the variations of water-soluble inorganic ions.In addition,the temporal variations of six criteria air pollutant mass concentrations obtained from auto monitoring stations during 2018-2019 were also used to evaluate the effectiveness of air-pollution control.The results showed that the prevention of air pollution has significantly improved the air quality in Nanning.The concentration of total NO_(3)^(-),SO_(4)^(2-),Ca^(2+),Mg^(2+),NH_(4)^(+),K^(+) and Na^(+) show a decreasing trend,which were related to biomass burning.Compared with results from PMF model between 2018 and 2019,contributions of secondary sulfate,secondary nitrate,industrial and agricultural sources to PM_(2.5) mass concentrations decreased in 2019,whereas the contribution of dust and biomass burning to PM_(2.5) mass concentrations increased 14.4% and 9.3%.The results suggested that the emissions from dust and biomass burning need to be strictly controlled.
作者
付洁
韦江慧
黄乃尊
庞业
蒋建宏
Fu jie;Wei Jianghui;Huang Naizun;Pang Ye;Jiang Jianhong(Guangxi Environment Monitoring Center,Nanning 530000,China)
出处
《环境科学与管理》
CAS
2021年第12期38-42,共5页
Environmental Science and Management
基金
广西重点研发计划(No.桂科AB20238015)。
