郑州市大气环境质量的评价

Evaluation on ambient air quality in Zhengzhou,Henan

郑州市大气污染问题日益严重,已经成为当前城市环境管理面临的焦点问题之一.以2005-2012年大气质量监测数据为依据,以《环境空气质量标准》(GB 3095—2012)为评价标准,对郑州市大气质量现状进行评价.结果表明:在所统计的8 a时间(共计2 918 d)中,郑州市空气质量达到国家一级标准(API≤50)的天数为152 d,占统计天数的5.21%;达到二级国家标准(50<API≤100)的天数为2 367 d,占统计天数的81.12%;达到三级及以下标准的有399 d,占统计天数的13.67%.郑州市大气首要污染物质是可吸入颗粒物.与国内其他城市大气质量相比,郑州市大气环境质量明显优于济南(84.3)、石家庄(82.9)、太原(81.4)、和武汉(80.2),但是比南京(77.6)略差.

In recent years,urban atmospheric pollution in Zhengzhou City is a commonly concerned environmental problem.Based on the reported air quality index （API） provided by the Zhengzhou Environment Monitoring Stations over the last eight years,and the Ambient Air Quality Standards of Chinese （GB 3095--2012）,ambient air quality in Zhengzhou City were assessed.Results showed that air quality was ＂good＂ or ＂moderate＂ in more than 86.33% of the statistical days over 8 years,other 13.67% days were light pollution,middling pollution and severe pollution,during which concentrations of ambient air pollutants exceeded the health-protected guidelines stated in the Chinese national air quality standard.PM10 was the prominent in the ambient air environment of Zhengzhou City.Compared to other cities in China's Mainland,the average API （78.1） of Zhengzhou over 8 years was higher than that of Nanjing （77.6）,and lower than that of Jinan （84.3）,Shijiazhuang （82.9）,Taiyuan （81.4）,and Wuhan （80.2）.