【摘 要】
:
为详细、准确揭示城市环境大气PM2.5的主要来源类型及其贡献比例,为我国城市大气PM2.5污染源控制提供直接的科学依据,本研究以深圳为例,优选5个代表点位,采集2014全年PM2
【机 构】
:
北京大学深圳研究生院环境与能源学院,深圳,518055北京大学环境科学与工程学院,北京,100871
【出 处】
:
第十二届全国气溶胶会议暨第十三届海峡两岸气溶胶技术研讨会
论文部分内容阅读
为详细、准确揭示城市环境大气PM2.5的主要来源类型及其贡献比例,为我国城市大气PM2.5污染源控制提供直接的科学依据,本研究以深圳为例,优选5个代表点位,采集2014全年PM2.5样品进行化学全谱分析,进而利用受体模型(PMF)解析出PM2.5的主要源贡献率,并结合源清单细化污染来源类别.结果表明,2014年深圳市PM2.5浓度为35.7μg/m3,呈东轻西重分布,主要组分为有机物和硫酸盐,其次是铵盐、元素碳和硝酸盐.源解析结果发现,机动车源、SO2二次转化源、VOCs二次转化源和NOx二次转化源生成是4个最主要的源.其次是远洋船舶、生物质燃烧、海洋源等.
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