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采用在线监测方法,于2009-07-08-2009-07-22在广东省汕头、潮州.揭阳3市各选择1个有代表性的空气质量监测点,同步进行PM_(2.5)和PM_(10)监测。结果表明,粤东3市PM_(2.5)和PM_(10)质量浓度低干部分沿海城市;PM_(10)与PM_(2.5)的质量浓度日变化呈双峰分布,分别处在上午(6:00-10:00)以及下午(18:00-22:00)2个时间段;PM_(10)与PM_(2.5)日平均浓度变化呈周期性波动.周期约为3～4 d;对于粤东3市区域,PM_(2.5)/PM_(10)值为0.521 5,说明PM_(10)中细颗粒物含量大于粗颗粒物含量。
Using the on-line monitoring method, one representative air quality monitoring point was selected in 3 cities of Jieyang, Shantou, Chaozhou, Guangdong Province from July 1, 2009 to August 8,2009, and PM_ (2.5) and PM_ (10) )monitor. The results showed that the PM_ (2.5) and PM_ (10) concentrations in the three eastern Guangdong provinces were lower than that in the coastal cities. The diurnal variation of PM_ (10) and PM_ (2.5) (10: 00-10: 00) and afternoon (18: 00-22: 00). The daily average concentrations of PM 10 and PM 2.5 fluctuated periodically with a period of about 3-4 d. For Guangdong The PM_ (2.5) / PM_ (10) value is 0.521 5 in the eastern 3 cities, indicating that the content of fine particles in PM_ (10) is larger than the content of coarse particles.