Particulate matter, gaseous and particulate polycyclic aromatic hydrocarbons (PAHs) in an urban traffic tunnel of China: Emission from on-road vehicles and gas-particle partitioning

Ying Liu; Yi Gao; Na Yu; Chenkai Zhang; Siyao Wang; Limin Ma; Jianfu Zhao; Rainer Lohmann

doi:10.1016/j.chemosphere.2015.03.065

Particulate matter, gaseous and particulate polycyclic aromatic hydrocarbons (PAHs) in an urban traffic tunnel of China: Emission from on-road vehicles and gas-particle partitioning

Chemosphere. 2015 Sep:134:52-9. doi: 10.1016/j.chemosphere.2015.03.065. Epub 2015 Apr 22.

Authors

Ying Liu¹, Yi Gao², Na Yu², Chenkai Zhang², Siyao Wang², Limin Ma², Jianfu Zhao², Rainer Lohmann³

Affiliations

¹ State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA; China Meteorological Administration Key Laboratory of Cities' Mitigation and Adaptation to Climate Change (Shanghai Meteorological Bureau), IESD, Tongji University, Shanghai 200092, China. Electronic address: liu_ying@tongji.edu.cn.
² State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
³ Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, USA.

PMID: 25911047
DOI: 10.1016/j.chemosphere.2015.03.065

Abstract

Traffic vehicles are a main source of polycyclic aromatic hydrocarbon (PAH) emission in urban area. It is vital to understand PAH gas-particle partitioning in real traffic environment and assess PAH vehicular emission factors in developing China. Concentrations of particulate matter, carbonaceous products, gaseous and particulate PAHs were measured during 2011-2012 in a road tunnel of Shanghai, China. Time variation of them reflected basic traffic operation of the tunnel. PAHs approached equilibrium between gas and particle phases and the partitioning was predicted better by a dual sorption model combining absorption into organic matter and adsorption onto black carbon. The influence of black carbon adsorption on the partitioning behavior of PAHs was important. The difference in isomer ratios of gaseous and particulate PAHs was attributed to PAH contributions from different traffic-related PAHs sources. Real-world vehicle emission factors of gaseous and particulate PAHs were quantified based on fuel burned model and vehicle kilometer traveled model.

Keywords: Emission factor; On-road emission; PAHs; PM(10); Shanghai.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Air Pollutants / analysis*
Carbon / analysis*
China
Environmental Monitoring / methods
Gases
Particulate Matter / analysis*
Polycyclic Aromatic Hydrocarbons / analysis*
Soot
Vehicle Emissions / analysis*

Substances

Air Pollutants
Gases
Particulate Matter
Polycyclic Aromatic Hydrocarbons
Soot
Vehicle Emissions
Carbon