衡阳市工业区大气PM_(2.5)微观形貌特征及组分研究

Study on Microscopic Morphology and Composition of PM_(2.5) in Industrial Areas in Hengyang

为了解衡阳市不同工业区大气PM_(2.5)微观形貌特征及化学组分,于2016年12月至2017年3月采集了衡阳市两个典型工业区的56个PM_(2.5)样品,并利用扫描电镜-X射线能谱法(SEM-EDX)分析了工业区冬、春季PM_(2.5)样品的微观形貌特征及化学组分。研究结果表明:衡阳市工业区大气PM_(2.5)污染整体呈现冬季>春季的特点,且钢管厂和松木工业园冬季PM_(2.5)污染水平相当,但春季污染水平差异较明显。SEM-EDX法分析还发现衡阳市钢管厂大气PM_(2.5)主要为铁氧化物或烟尘集合体,而松木工业园大气PM_(2.5)主要为硅铝酸盐或硅氧化物,PM_(2.5)颗粒物属性差异可能与工业区燃烧工艺及周边环境有关。

In order to understand the Microscopic Morphology and Composition of PM 2.5 in different industrial areas in Hengyang,56 PM 2.5 samples in two typical industrial areas of Hengyang City were collected and analyzed from December 2016 to March 2017and the micro-morphology and chemical composition of PM 2.5 in industrial area were analyzed by Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectrometer(SEM-EDX).The results showed that PM 2.5 pollution in two industrial areas of Hengyang City all followed the order of winter>spring.And the PM 2.5 pollution level of Hengyang Valin Steel Tube Company was similar to that of Songmu Industrial Park in winter.However,the PM 2.5 pollution level of them was obviously different in spring.By using SEM-EDX method,it founded that the PM 2.5 particles of Hengyang Valin Steel Tube Company were mainly iron oxide or soot and dust,while the PM 2.5 particles of Songmu Industrial Park both winter and spring was mainly aluminosilicate or silicon oxide.The different particulate property between Hengyang Valin Steel Tube Company and Songmu Industrial Park might be related to the industrial combustion process and the surrounding environment.