环境工程学报2017，Vol.11Issue(5)：2858-2864,7.DOI:10.12030/j.cjee.201601173
道路环境黑碳变化特征及影响因素
Concentration variations and influencing factors of black carbon in road environment
摘要
Abstract
In order to analyze concentration variations and influencing factors of black carbon (BC) within roadway environments,BC,NOx,and PM2.5 were measured at roadside sites before,during,and after the APEC conference in Beijing.Data on road traffic volumes,vehicle speeds,and vehicle types were collected at the same time that the air quality sampling took place.Then,correlation analyses,multiple linear regressions,and emission intensity calculations were used to study the influence of traffic restrictions and meteorological parameters on BC concentrations.The results showed that the BC concentration was 7.44 μg · m-3 throughout the entire monitoring period,and values of 4.43 μg · m-3 and 8.87 μg · m-3 were measured during times of traffic restrictions and no traffic restrictions,respectively;thus,a 50％ reduction in BC was observed during the traffic restrictions.The BC concentrations displayed an obvious bimodal structure,and the peak segments were detected at the hours of 06:00 to 09:00 and 18:00 to 21:00.The relationships between BC and both PM2.5 and NOx were positive and the linear correlations were significant.While the traffic volume declined by 52％,heavy duty vehicle traffic showed little change.The emission intensity was reduced by 15％ as a result of the decrease in traffic volumes,and concurrently,vehicle speeds increased.The multiple linear regression model and scenario analysis results showed that weather conditions and traffic restrictions contributed 56％ and 30％ to the BC concentration reduction,respectively.The BC concentrations could likely be reduced by at least 34％ if traffic restrictions are carried out during typical non-restriction periods.关键词
黑碳(BC)/PM2.5/道路环境/影响因素/北京Key words
black carbon (BC)/PM2.5/road environment/influencing factors/Beijing分类
资源环境引用本文复制引用
田灵娣,樊守彬,郭津津,张东旭,孙改红..道路环境黑碳变化特征及影响因素[J].环境工程学报,2017,11(5):2858-2864,7.基金项目
环保公益性行业科研项目(201409004) （201409004）
国家科技支撑计划项目(2013BAC17B03) （2013BAC17B03）
