焦作市大气颗粒物中NH_4^+含量的变化趋势及影响因素  

Content Change and Influence Factors of NH_4^+ in Atmospheric Particles in Jiaozuo City

作　　者：李雪萍[1] 王明仕[2] 刘克武[2] 钦凡[2] 

机构地区：[1]兰州大学资源环境学院,兰州730030 [2]河南理工大学资源环境学院,河南焦作454000

出　　处：《城市环境与城市生态》2012年第6期14-17,共4页Urban Environment & Urban Ecology

基　　金：国家自然科学基金--煤中有机砷的环境地球化学研究(40703005);煤中有机砷迁移转化的行为研究(41073075)

摘　　要：为探讨大气颗粒物中NH4+变化趋势及影响因素,对焦作市2010年1月—12月大气颗粒物进行了6级分级采样,NH4+的分析测定结果显示:大气颗粒物中NH4+含量的最大值出现在2月份,最小值出现在5月份,同样大气颗粒物质量浓度的最大值也出现在2月份,最小值也出现在5月份;大气颗粒物中NH4+含量为0.566～15.870μg/m3,平均值为5.936μg/m3,在2月份出现最大值15.870μg/m3,5月份出现最小值0.566μg/m3;NH4+主要分布在粒径为0.41μm>D≥2.10μm的大气颗粒物中,冬季主要分布在粒径1.00μm以下的大气颗粒物中,占质量总量的45%左右;NH4+含量与大气相对湿度和风速存在密切的关系,大气相对湿度增高时NH4+含量随之增高,二者呈正相关;风速增大时NH4+含量反而降低,二者呈负相关。The purpose of this study was to investigate the content change and the influence factors of NH4^＋ in atmospheric particles. The samples were collected in Jiaozuo City by high volume cascade impact sampler from January to December in 2010, and they were determined by sodium＇s colorimetric method. The results showed that： The maximum of NH4^＋ content appeared in February and the minimum appeared in May. The maximum of particle quality density also appeared in February and the minimum appeared in May. The NH4^＋ content in atmospheric particles was in the rang from 0.566 μg/m^3 to 15. 870 μg/m^3 ,and the average was 5. 936 μg/m^3. The maximum was 15. 870 μg/m^3 in

关 键 词：大气颗粒物 NH4+ 粒径 气湿 风速 焦作市 

分 类 号：X513[环境科学与工程—环境工程]