杭州主城区悬浮细颗粒PM_(2.5)浓度变化及其组分分析 |
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引用本文: | 洪盛茂,张天,姚晗,焦荔,何曦,孙鸿良,徐鸿,包贞,杨乐,何纪平,叶贤满. 杭州主城区悬浮细颗粒PM_(2.5)浓度变化及其组分分析[J]. 中国粉体技术, 2010, 16(1): 14-17,34. DOI: 10.3969/j.issn.1008-5548.2010.01.004 |
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作者姓名: | 洪盛茂 张天 姚晗 焦荔 何曦 孙鸿良 徐鸿 包贞 杨乐 何纪平 叶贤满 |
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作者单位: | 杭州市环境监测中心站,浙江杭州310007 |
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基金项目: | 杭州市科技局重大科技创新项目 |
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摘 要: | 利用杭州市区2006—2008年大气悬浮颗粒PM2.5和PM2.5-10的监测资料,研究它们的物化特征。结果表明:杭州主城区PM2.5和PM2.5-103年的平均浓度分别为0.073、0.037mg·m-3,ρ(PM2.5)/ρ(PM2.5-10)的比值为1.86。PM2.5浓度存在双峰型日变化,以9:00和18:00为峰值,日变化幅度较大,并呈现冬高、夏低的季节变化。PM2.5化学组分分析表明:PM2.5中含量最多的是有机碳,占24.4%,其次是SO42-,不同组分呈现不同的季节变化。
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关 键 词: | 大气悬浮颗粒 二次粒子 季节变化 |
Variations in Mass Concentrations and Components in Urban Areas of Hangzhou, China |
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Abstract: | Based on the monitoring datas of PM2.5 from 2006 to 2008 over Hangzhou urban,the physical and chemical characteristics were analyzed.The results showed that the average concentrations of PM2.5 and PM2.5-10 during three years were 0.073 mg·m-3 and 0.037 mg·m-3,respectively.ρ(PM2.5)/ρ(PM2.5-10) ratio was 1.86.Obvious diurnal variation of PM2.5 was observed,and showed a clear seasonal pattern with high concentration in winter and low values in summer.PM2.5 chemical components were analyzed,it was shown that the percent of organic carbon was most abundant,which was 24.4%,and SO42-was secondary.The seasonal variation of PM2.5 components were ddifference. |
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Keywords: | particulate matter second particle diurnal variation |
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