摘要
针对密闭地铁空气中黑碳等污染物浓度水平较高的环境污染问题,利用AE-51型微型黑碳仪于2017年4—5月对通化门地铁站黑碳(Black carbon,BC)浓度的日间变化及日内变化进行定点监测,对比地铁上下线及车厢内外的BC个体暴露差异,探讨地铁黑碳浓度水平的影响因素以及黑碳个体暴露特征.结果表明,从地铁黑碳浓度日内变化来看,地铁黑碳浓度变化态势呈双峰型,与上下班高峰期的变化基本一致;从地铁黑碳浓度日间变化来看,节假日期间的地铁黑碳浓度是工作日的1～2倍;同时,地铁黑碳浓度水平不仅与人类活动频次和强度密切相关,还受到当日气象条件的影响.地铁站地上线BC污染水平受气象条件的影响较地下线大.车厢内的黑碳浓度高出站台1～2倍,密闭环境更加不利于黑碳颗粒物的扩散.
In order to understand the environment pollution problem with high concentration of BC and other pollutants in subway,the AE-51micro black carbon meter was used to monitor and analyze the daily and intra-day changes of black carbon(BC)concentration in Tonghuamen subway station from April to May2017.Meanwhile the BC individual exposure differences were shown between the underground and aboveground of the station and inside and outside of the train.The influencing factors of black carbon concentration in subway and the exposure characteristics of individuals were discussed.The results show that from the intra-day change of black carbon concentration the trend is bimodal,which is basically consistent with the changing of the peak period of commuting.From the diurnal variation of black carbon concentration,the concentration during the holiday is1-2times of the working day.Meanwhile,the concentration is not only closely related to the frequency and intensity of human activities,but also to the impact of meteorological conditions on the day.The BC pollution level of the above ground subway station was affected by meteorological conditions and is higher than the underground station.The black carbon concentration in the compartment is about1-2times more than the platform.It can be seen that the closed environment is more detrimental to the diffusion of black carbon particles.
作者
刘璐
谭志海
苏冠儒
李冬雪
LIU Lu;TAN Zhihai;SU Guanru;LI Dongxue(School of Environmental and Chemical Engineering,Xi′an Polytechnic University, Xi′an 710048, China)
出处
《西安工程大学学报》
CAS
2018年第6期652-657,共6页
Journal of Xi’an Polytechnic University
基金
黄土与第四纪国家重点实验室开放基金(SKLLQG1618)
关键词
黑碳
个体暴露
定点监测
西安地铁
black carbon
personal exposure
fixed site monitoring
Xi′an subway
