摘要
利用设置在上海市中心城区交通主干道旁的路边空气质量自动监测站2018年1—12月的连续观测数据,研究苯系物(BTEX)污染水平、变化特征以及其与CO、NO x和气象参数的关系。结果表明,观测期间BTEX小时均值为0.10~169.38μg/m^3,年均值为(13.66±0.14)μg/m^3,甲苯占比最高。ρ(BTEX)受污染源排放强度和天气状况的影响大,其日变化呈单谷型,冬季值比夏季高。BTEX各化合物具有较好的同源性,ρ(苯)/ρ(甲苯)为(0.49±0.01)。BTEX与机动车尾气主要成分CO、NOx呈正相关,与风速负相关。其值低于北京、南京、郑州、杭州和西安等城市。
The contamination level and variation characteristics of benzene series(BTEX)and their relationship with CO,NO x and meteorological parameters were studied by using the continuous observation data of roadside air quality automatic monitoring station located beside the main traffic road in downtown Shanghai from January 2018 to December 2018.The results showed that the hourly average concentration of BTEX was 0.10~169.38μg/m^3 during the observation period.The yearly average concentration of BTEX was(13.66±0.14)μg/m^3,and toluene accounted for the highest proportion.The concentration of BTEX was greatly affected by the intensity of pollutant emission and weather conditions.The diurnal variation of BTEX concentration was single valley type,and the concentration in winter was higher than that in summer.The compounds of BTEX had good homology,and the B/T ratio was(0.49±0.01).The concentration of BTEX was positively correlated with the concentration of CO and NOx,and negatively correlated with the wind speed.The concentration of BTEX was lower than that of Beijing,Nanjing,Zhengzhou,Hangzhou and Xi an in China.
作者
肖彬
XIAO Bin(Shanghai Jingan District Environmental Monitoring Station,Shanghai 200072,China)
出处
《环境监控与预警》
2020年第1期20-24,43,共6页
Environmental Monitoring and Forewarning
关键词
苯系物
交通干道
上海城区
Benzene series
Main traffic road
Shanghai urban area
