重庆沙坪坝典型区域空气离子质量评价研究

Evaluation of Air ion Quality in Typical Areas of Shapingba District,Chongqing

2013年11月~2014年8月,采用便携式空气负离子测定仪(AIC1000)对重庆市沙坪坝区3个典型区域(城市商业区、城市住宅区和城市森林公园)的空气离子进行定位监测。结果表明:城市商业区和城市住宅区的空气正离子月动态均呈"双峰型",空气负离子则均呈"单峰型",而城市森林公园的空气正负离子变化规律均呈"单峰型";各典型区域的空气正离子水平差异不显著(P>0.05),而其空气负离子水平差异显著(P<0.01),大小排序为城市森林公园(513个·cm^(-3))>住宅区(377个·cm^(-3))>商业区(280个·cm^(-3)),同时,单极性系数和空气离子评议系数也表明,城市森林公园的空气离子质量优于城市住宅区,且能更多时间给人以舒适感,而城市住宅区的空气离子质量又优于城市商业区。

From November 2013 to August 2014, air ions were monitored by portable air anions tester （AIC1000） in three typical areas （urban commercial areas, urban residential areas and urban forest parks） of Shapingba District, Chongqing. The results showed that monthly variations of positive air ions in urban commercial areas and urban residential areas all presented a ＂two-peak＂ pattern, and their negative air ion displayed a ＂single-peak＂ pattern, but monthly variations of positive air ions and negative air ions in urban forest parks all exhibited a ＂single-peak＂ pattern. The difference of positive air ions among three typical areas was insignificant （ P 〉 0. 05 ）, but the difference of negative air ions was significant （ P 〈 0. 01 ）. The concentration of negative air ions was in the order of forest parks （513 negative air ions per cubic centimeter） 〉 residential areas （377 negative air ions per cubic centimeter） 〉 commercial areas （280 negative air ions per cubic centimeter）, moreover, ion polarity ratio and air ion assessment index al- so showed that the air ion quality of urban forest parks was better than that of residential areas, and made people feel comfortable for more time, but the air ion quality of residential areas was better than that of commercial areas.