【摘要】 采用在线监测方法于2009年7月8日至22日在广东省汕头、潮州、揭阳三市各选择1个有代表性的空气质量监测点同步进行PM2.5和PM10监测。监测结果表明,粤东三市PM2.5和PM10质量浓度低于部分沿海城市;PM10与PM2.5的质量浓度日变化呈双峰分布,分别处在上午(6:00至10:00)以及下午(18:00至22:00)两个时间段;PM10与PM2.5日平均浓度变化呈周期性波动,周期约为3～4 d;对于粤东三市区域,PM2.5/PM10为0.5215,说明PM10中细颗粒物含量大于粗颗粒物含量。更多还原

【Abstract】 PM2.5 and PM10 were monitored simultaneously by continuous on-line measurement instruments from July 8 to July 22,2009 in Shantou,Chaozhou,Jieyang of Guangdong Province.The results showed that concentrations of PM2.5 and PM10 in the three cities of eastern Guangdong were lower than some coastal cities.PM10 and PM2.5 exhibited two peaks in a day,which were from 6 to 10 a.m.and from 18 to 22 p.m.,respectively.The daily averaged concentrations of PM10 and PM2.5 fluctuated in a cycle of about 3 or 4 days.The portions of PM2.5 were larger than those of other particles in sizes from 2.5 μm to 10 μm.The ratio of PM2.5 to PM10 was 0.521 5 in the three cities,in which measurements were carried out.更多还原