摘要
大气颗粒物是影响空气质量和人类健康的重要因素,了解其污染水平、关键组分来源及变异特征具有重要意义。本研究对贵阳市城区两个代表性监测点(市监测站和黔灵公园马鞍山)的2014年2月14日~20日(冬季)和2014年7月1日~7日(夏季)大气PM_(10)进行了采集,分析其24小时平均质量浓度和硫酸根的硫同位素(δ^(34)S值)组成特征,探讨大气PM_(10)中硫的来源和变化。结果表明,贵阳市2月和7月采样期间大气PM_(10)浓度分别为30~125μg/m^(3)(平均70±29μg/m^(3))和21~104μg/m^(3)(平均56±22μg/m^(3)),均略高于我国现行空气质量大气颗粒物PM_(10)的24小时平均浓度一级标准限值(50μg/m^(3))。贵阳市大气PM_(10)中硫酸根的δ^(34)S值范围为-3.98‰~4.99‰(平均0.28‰±2.32‰),且2月显著高于7月;大气颗粒物δ^(34)S值表明,贵阳市大气SO2排放主要来自其它化石燃料燃烧,燃煤贡献较少,推行的“控煤减硫”措施效果显著。
Atmospheric particulate(PM)is an important factor influencing air quality and human health.It is of great significance to understand its pollution level,sources of key components and variation characteristics.In the present study,atmospheric PM_(10)samples at two representative urban sites of Guiyang city during 14 to 20 February(Winter)and 1 to 7 July(Summer),2014 were collected.Daily-based mass concentrations and sulfur isotope compositions of sulfate in PM_(10)samples were analyzed.The mass concentrations of atmospheric PM_(10)in February and July of Guiyang were 30-125μg/m^(3)(mean 70±29μg/m^(3))and 21-104μg/m^(3)(mean 56±22μg/m^(3)),respectively,which were higher than the national level I standard(50μg/m^(3)).Theδ^(34)S values of sulfate in atmospheric PM_(10)in Guiyang were-3.98‰-4.99‰(mean 0.28‰±2.32‰),and was generally higher in February than in July.The main source of sulfur in atmospheric PM_(10)of Guiyang was fossil fuel,except for coal,indicating that the coal-controlling measures have been effective in reducing SO_2 emissions.
作者
肖德安
傅成诚
高兰兰
龚伟
张志敏
XIAO De'an;FU Chengcheng;GAO Lanlan;GONG Wei;ZHANG Zhimin(College of Resources and Environmental Engineering,Guizhou Institute of Technology,Guiyang 550003,China;Environmental Monitoring Center of Guizhou Province,Guiyang 550081,China)
出处
《地球与环境》
CAS
CSCD
北大核心
2023年第3期348-353,共6页
Earth and Environment
基金
贵州省科学技术基金项目(黔科合J字[2011]2089)
贵州省优秀科技教育人才省长专项资金项目([2011]15号)
高层次人才科研条件特助经费项目(TZJF-2010年-078号)。
