Seasonal Variations and Sources of Airborne Polycyclic Aromatic Hydrocarbons (PAHs) in Chengdu, China

Yang, Jian; Xu, Wangli; Cheng, Huiyu

doi:10.3390/atmos9020063

Cited by 27 publications

(10 citation statements)

References 22 publications

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“…PC 2 was responsible for 4.30% of the total variance, and mostly due to IcdP, BghiP, and DahA (1.56, 0.47, and 0.15). It has been proved in previous studies, BghiP, BkF, and IcdP were derived from vehicle exhaust, BaA and Chry were the products of petroleum combustion, BbF was from the high-temperature combustion, and Flua and Pyr came from coal-burning 50 – 52 . To further derive, the main sources of PAHs in surface sediments from Taihu Lake were man-made sources, including vehicle exhaust, petroleum combustion, and high-temperature combustion, which was consistent with the results of the PAH molecular diagnostic ratio.…”

Section: Resultsmentioning

confidence: 85%

Spatial occurrence and sources of PAHs in sediments drive the ecological and health risk of Taihu Lake in China

Lang

Wang

et al. 2022

Sci Rep

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To study the spatial occurrence, sources, and ecological risks of 16 PAHs, surface sediments had been collected from seven major areas of Taihu Lake, China in April 2021. Results showed that the concentrations of ∑16PAHs varied between 1381.48 and 4682.16 ng g−1, and the contents of BghiP in each sample were the highest. The PAHs concentrations in the sediments near the lakeshore were much higher than those in the central area of the lake. The sedimentary ∑16PAHs were mainly composed of molecular-weight monomers and 4-ring PAHs showed superiority (35.69–45.02%). According to the ratio of PAH monomer, the sedimentary PAHs in Taihu Lake were dominantly derived from the combustion. Through the biological toxicity assessment and the BaP equivalent (BaPE), great biological risks of PAHs monomers i.e. DahA and IcdP were found. Both concentrations of ∑16PAHs and dominant 4–6-ring monomers accompanied by carcinogenic risks in many areas of Taihu Lake increased. It is necessary to strengthen monitoring and take measures to control the input of organic pollutants.

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Section: Resultsmentioning

confidence: 85%

Spatial occurrence and sources of PAHs in sediments drive the ecological and health risk of Taihu Lake in China

Lang

Wang

et al. 2022

Sci Rep

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“…In recent years, the network of monitoring stations for the determination of PAHs in the atmosphere has been expanding in the cities of many countries, and the list of some of their compounds to be determined has been increasing. Our results on the concentrations of these environmental toxicants at the two reference stations in Irkutsk and Listvyanka of the Southern Baikal region were lower than in the cities of Central and North China but higher than in the cities of Europe, Japan, and the United States [9,[27][28][29][30][31][32][33][34][35].…”

Section: Seasonal and Interannual Dynamics Of Pah Concentrationsmentioning

confidence: 93%

Polycyclic Aromatic Hydrocarbons in the Atmosphere of the Southern Baikal Region (Russia): Sources and Relationship with Meteorological Conditions

et al. 2022

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This article presents the results of the long-term studies at two stations located in the city of Irkutsk and the Listvyanka settlement of the southern Baikal region (East Siberia) concerning the concentration of polycyclic aromatic hydrocarbons (PAHs) in atmospheric aerosol. The studies revealed the seasonal and interannual dynamics in the distribution of PAHs in aerosols from urban (source) and rural (receptor) areas. We carried out a comprehensive analysis of weather conditions such as wind direction, relative humidity, air temperature, and atmospheric pressure. The analysis determined high correlations between air temperature, atmospheric pressure, temperature inversions, and PAHs at the monitoring stations. The average annual concentrations of PAHs in the abnormally warm 2020 were three times lower than the average values obtained in the cold 2016. The toxic equivalent concentrations (BaPeq) increased from summer to winter with an increase in the contribution from benzo(a)pyrene, one of the most toxic and hazardous compounds of this class of organic substances. Four-, five- and six-ring PAHs mainly predominated in aerosol; the proportion of two- and three-ring PAHs increased from the warm season to the cold season. Diagnostic ratios of PAHs identified the main sources of air pollution by this class of compounds: combustion of coal, liquid fuel and firewood, vehicle emissions, and wildfires. The percentage of the transport of anthropogenic aerosol containing PAHs from industrial sources of the Southern Baikal region towards Lake Baikal was 65 to 71%.

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“…The average PAH concentration was up to 13.93 ng/m 3 , and the abundant species were Chr, BbF, BkF, and BeP, with values of 1.83, 2.74, 1.64, and 1.77 ng/m 3 , respectively, and accounted for approximately 60% of the ∑PAH concentration. Many studies have pointed to stationary emissions if there is a high factor loading of Chr and BbF [7,8,35]. As shown in Figure 3, the mean PAH concentrations observed in the autumn (2.15 ng/m 3 ) and winter (2.90 ng/m 3 ) are higher than those in summer (1.62 ng/m 3 ) and spring (1.67 ng/m 3 ).…”

Section: Pah (Polycyclic Aromatic Hydrocarbon) Concentrations Seasona...mentioning

confidence: 94%

Characteristics of Fine Particulate Matter (PM2.5)-Bound n-Alkanes and Polycyclic Aromatic Hydrocarbons (PAHs) in a Hong Kong Suburban Area

et al. 2022

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PM2.5 samples were collected at Tung Chung (TC), Hong Kong, during four nonconsecutive months in 2011/2012 to determine the concentrations, seasonal variations, and potential sources of polycyclic aromatic hydrocarbons (PAHs) and n-alkanes (n-C15-n-C35). Samples were analyzed using the thermal desorption gas chromatography/mass spectrometry (TD-GC/MS) method. The concentrations of particulate PAHs ranged from 1.26–13.93 ng/m3 with a mean value of 2.57 ng/m3, dominated by 4-ring species. Phenanthrene (Phe) and fluoranthene (Flu) were the two most abundant species, accounting for 13% and 18%, respectively. The dominant sources of PAHs were coal and biomass burning. The inhalation cancer risk value in our study exceeded 1 × 10−6 but was below 1 × 10−4, implying that the inhalation cancer risk of PAHs at the TC site is acceptable. The average concertation of n-alkanes was 103.21 ng/m3 (ranging from 38.58 to 191.44 ng/m3), and C25 was the most abundant species. Both PAHs and n-alkanes showed higher concentrations in autumn and winter whilst these values were lowest in summer. The carbon preference index (CPI) and percent contribution of wax n-alkanes showed that biogenic sources were the major sources. The annual average contributions of higher plant wax to n-alkanes at TC were over 40%.

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Seasonal Variations and Sources of Airborne Polycyclic Aromatic Hydrocarbons (PAHs) in Chengdu, China

Cited by 27 publications

References 22 publications

Spatial occurrence and sources of PAHs in sediments drive the ecological and health risk of Taihu Lake in China

Spatial occurrence and sources of PAHs in sediments drive the ecological and health risk of Taihu Lake in China

Polycyclic Aromatic Hydrocarbons in the Atmosphere of the Southern Baikal Region (Russia): Sources and Relationship with Meteorological Conditions

Characteristics of Fine Particulate Matter (PM2.5)-Bound n-Alkanes and Polycyclic Aromatic Hydrocarbons (PAHs) in a Hong Kong Suburban Area

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