Sources and distribution of polycyclic aromatic hydrocarbons in street dust from the Chang-Zhu-Tan Region, Hunan, China

Abstract

Street dusts collected from 20 locations in the Chang-Zhu-Tan (Changsha, Zhuzhou, and Xiangtan) region, Hunan, China, in May to July 2006, were investigated for sources of polycylic aromatic hydrocarbons (PAHs). The individual PAH concentrations were in the range of 10-4316 ng g(-1), and ∑PAHs(16) levels were in the range of 3,515-24,488 ng g(-1), with a mean of 8,760 ng g(-1). The high-molecular-weight PAHs (four to six rings), ranging from 47.51 to 82.11 %, with a mean of 74.79 %, were the dominant PAH compounds in almost all of the dusts. The isomer ratios suggested a rather uniform mixture of coal combustion and petroleum PAH sources. Factor analysis and multiple linear regression analysis indicate that the main sources of the 16 PAHs were coal combustion/vehicle exhaust, coking/petroleum, and plant combustion, with contribution rates of 50.9, 35.01, and 14.08, respectively. The spatial distributions of PAH concentrations were significantly related to the distribution of industries, traffic circulation, and farmland in this region.

Characterization of Polycyclic Aromatic Hydrocarbons (PAHs), Iron and Black Carbon within Street Dust from a Steel Industrial City, Central China

“…Moreover, as a street dust, it also presented a mixed source of vehicular traffic emission. The result was in agreement with the conclusion that the vehicular traffic and coal combustion are the dominating contributors to PAHs in street dust of the heavy industry area, such as ChangZhu-Tan Region, and Lanzhou (Long et al, 2013;Jiang et al, 2014).…”

Status, source, ecological and health risk assessment of toxic metals and polycyclic aromatic hydrocarbons (PAHs) in street dust of Abadan, Iran

“…PAHs with a high molecular weight have a greater carcinogenic toxicity compared to low molecular weight PAHs (Colombo et al, 2006;Szabová et al, 2008). Multivariate analysis including correlation coefficients and principal component analysis (PCA) have been utilised to identify the source of toxic elements and PAHs (Long et al, 2013). Contamination of toxic metals and PAHs in urban dust have been considered extensively in industrialised countries (Lee et al, 2011).…”

Source, Characterization of Indoor Dust PAHs and the Health Risk on Chinese Children

“…Step source of PAHs [20,21] . Different diagnostic ratios indicate specific emission sources [22] , such as LMW/ HMW (low molecular weight, 2-3 rings PAHs; high molecular weight, 4-6 rings PAHs), Ant/(Ant+Phe), Flu/(Flu+Pyr), BaA/(BaA+Chr), IcdP/(IcdP+BghiP) and ∑COMB/∑PAHs (∑COMB, including Flu, Pyr, BaA, Chr, BbF, BkF, BaP, IcdP, and BghiP).…”