Chemical Mass Balance Source Apportionment of Size-Fractionated Particulate Matter in Nanjing, China

Abstract

In recent years, atmospheric particulate matter has become the primary air pollutant in Nanjing, China. In order to support a scientific basis for particles reduction, it is of great importance to investigate the contribution of different sources to particulate matter. In this paper, the characteristics of chemical composition of observational data for size-fractionated particulate matter at Gulou site and Pukou site in Nanjing from May 2010 to April 2011 were analyzed. Emission samples of particulate matter were collected and size-fractionated particulate chemical compositions were analyzed to obtain the source profiles. , respectively. The dominant chemical constituents are SO 4 2-, NO 3 -, Ca, NH 4 + , Cl -, Fe, Al, and K, accounting for 93.02% and 91.56% of all of the measured compositions in PM 10 at Gulou and Pukou. These components account for 95.23% and 93.48% of PM 2.1 at Gulou and Pukou. Seven types of sources, including coal combustion dust, construction dust, smelting dust, soil dust, vehicle exhaust, secondary aerosols and sea salt, are considered. The results of source apportionment show that in coarse particles, construction dust contributes a maximum of 58.9% at Gulou and 47.3% at Pukou. Smelting dust, as the second most important source, contributes 14.1% and 19.7% at these two sites. For fine particulate matter, secondary inorganic aerosols and coal dust contribution are the two largest sources accounting for 58.8% and 15.9% at Gulou and 44.2% and 39.5% at Pukou. The findings will be useful for the local government to create efficient control strategies to reduce the emission of construction dust and to pay great attention to the prevention of secondary aerosols and coal combustion dust.

Seasonal Variation and Chemical Characteristics of Atmospheric Particles at Three Islands in the Taiwan Strait

“…The source apportionment of ambient PM 10 was assessed using a receptor model based on the principle of chemical mass balance (CMB) (Kothai et al, 2008;Yatkin and Bayram, 2008;Li et al, 2013;Shi et al, 2014;Chen et al, 2015). Since the detailed descriptions of CMB receptor model (e.g., CMB 8.0) are available elsewhere, only a brief summary is presented as supplementary file S1-1 and Table S-3.…”

Source Apportionment of PM2.5 during Haze and Non-Haze Episodes in Wuxi, China

“…With the process of urbanization, the amount of construction and motor vehicles is also increasing gradually. Ambient PM 2.5 samples were collected daily at 11 sites including urban sites, industrial sites, and clean sites (description and location of these sites are shown in Figure 1) in Wuxi in January (18 January-2 February except 21 January), April (12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26), August (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16), and October (9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23) in 2016, representing winter, spring, summer, and autumn respectively. Wuxi.…”

Impacts of emission reduction and meteorological conditions on air quality improvement during the 2014 Youth Olympic Games in Nanjing, China

“…Dong et al (2013) found that independent NO x emission reduction would strengthen O 3 as a side effect in the YRD. Chen et al (2015Chen et al ( , 2017 studied the source apportionment of size-fractionated particles in Nanjing and found that fugitive and construction dust decreased significantly in YOG.…”

“…Nanjing is a highly urbanized city and its GDP ranked 12th of all the cities in China in 2013. Due to fast urbanization and industrialization, heavy motor vehicles and construction dust, Nanjing has long suffered from air pollution (Dong et al, 2013;Chen et al, 2015).…”