南宁市大气颗粒物PM_(l0)、PM_(2.5)污染水平

Pollution Levels of the Airborne Particulate Matter(PM_(10),PM_(2.5))in Nanning City

为了初步调查南宁市大气中颗粒物PMl0、PM2.5的污染水平 ,于2002年春、夏、秋、冬4季在南宁市的5个典型城市功能区 ,采集了85个样品.结果表明 ,南宁市PMl0、PM2.5 的污染很严重 ,超标率为82.5 %、92.5% ,而且对人体健康危害更大的PM2.5 占PM10 的大部分 ,约为63.5 % ,且重污染区PM2.5 浓度超过轻污染区近一倍 ,应引起公众和相关职能部门的高度重视.

For preliminary investigation of pollution levels of airborne particulate matter in Nanning city,eighty five airborne particulate(PM 10 ,PM 2.5 )samples were collected at five typical function areas of Nanning during winter,spring,summer,autumn in the year2002.The results indicate that the pollution by PM 10 ,PM 2.5 is quite serious.The rates exceeding the standards are82.5%?92.5%.The PM 2.5 fraction,which is more harmful to human health,accounts approximately63.5%of the PM 10 ,and the concentration of PM 2.5 at the severe polluted area exˉceeds approximately one time than at the light polluted area.It should come to the close attention of the public and the related functional sectors.