设为首页 加入收藏 登录旧版
郑州市PM2.5组分季节性特征及来源研究
Seasonal Characteristics and Source Apportionment of PM2.5 Components in Zhengzhou City
投稿时间:2019-10-21  修订日期:2020-05-08
DOI:10.19316/j.issn.1002-6002.2020.04.08
中文关键词:  化学组分  PM2.5  季节性  源解析  郑州市
英文关键词:chemical components  PM2.5  seasonal  source apportionment  Zhengzhou
基金项目:
作者单位
陈慕白 西南民族大学,四川成都610041 
袁明浩 郑州市环境保护监测中心站,河南郑州450007 
林秋菊 南开大学环境科学与工程学院,国家环境保护城市空气颗粒物污染防治重点实验室,天津300350 
张雪林 广州禾信仪器股份有限公司,广东广州510530 
摘要点击次数: 280
全文下载次数: 54
中文摘要:
      为了探究郑州市大气PM2.5组分的季节性特征及来源,于2017年12月至2018年11月对郑州市5个点位进行采样,共采集有效环境受体样本1 166个。通过研究受体样本PM2.5中的碳组分、水溶性离子和无机元素信息,获取各组分的季节特征,并结合正定矩阵因子分解(PMF)模型进行来源解析。结果表明,采样期间,郑州市PM2.5平均浓度为69.6 μg/m3,占比较高的化学组分为NO-3、有机碳(OC)、SO2-4和NH+4,占比之和为86.7%。其中,NO-3、OC和NH+4呈现冬季高、夏季低的季节性浓度分布规律,SO2-4则是秋冬季稍高于春夏季。此外,Al、Si、Fe和Ca的浓度在春秋季略高于冬夏季。PMF模型解析结果显示,二次源为郑州市PM2.5首要污染源,分担率为50.9%,其次是移动源(分担率12.0%)、燃煤源(分担率11.4%)和扬尘源(分担率10.2%)。其中,燃煤源在冬季较高、夏季较低,移动源在夏季最高,扬尘源在春季和秋季较高。
英文摘要:
      To study the seasonal characteristics and source apportionment of PM2.5 components in Zhengzhou city, 1166 effective samples were collected at five stations in Zhengzhou during Dec. 2017 to Nov. 2018. Seasonal characteristics were obtained by the study of carbon components, water-soluble ions and inorganic elements, while source apportionment was conducted by PMF model. The results demonstrated that average concentration of fine particulate matters in Zhengzhou was 69.6 μg/m3 during study period, the main components were NO-3, OC, SO2-4, and NH+4, which contributed 86.7% mass of the fine particulate matters in total.The mass of NO-3, OC, and NH+4 presented seasonal changes of high in winter and low in summer, SO2-4 in winter was slightly higher than in spring and summer. Al, Si, Fe, and Ca in spring and fall were slightly higher than in winter and summer. Source apportionment results showed that the main pollution sources were secondary sources, mobile pollution sources, coal combustion, and dust sources, which accounted for 50.9%, 12.0%, 11.4%, and 10.2% of fine particulate matters, respectively. Coal combustion accounted for higher contribution in winter compared to summer, while mobile pollution sources accounted for highest contribution in summer compare to other seasons, dust sources accounted for higher contribution in spring and fall.
查看全文  查看/发表评论  下载PDF阅读器