scholarly journals GAS–PARTICLE PARTITIONING OF POLYCYCLIC AROMATIC HYDROCARBONS - PAHs IN AMBIENT AIR IN HOCHIMINH CITY

2018 ◽  
Vol 55 (4C) ◽  
pp. 97
Author(s):  
Nguyen Doan Thien Chi
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Gas Phase ◽  
Aromatic Hydrocarbons ◽  
High Performance ◽  
Ambient Air ◽  
Average Concentration ◽  
Particle Phase ◽  
Polycyclic Aromatic ◽  
Pahs Concentration

This research conducted an analysis of 14 Polycyclic Aromatic Hydrocarbons (PAHs) in gas and particle-phase in ambient air in Hochiminh City to investigate their occurence and the gas/particle distribution. Gas and particle samples were collected from June to August 2015 in Hochiminh City and PAHs were treated and analyzed using high performance liquid chromatography with fluorescence detection (HPLC/FLD). Results showed that average concentration of 14 PAHs were from 6.4 to 29.8 ng/m3 and from 50.7 to 133 ng/m3 in particle-phase and in gas-phase, respectively. The concentration of PAHs in the gas-phase accounted for more than 80% of total PAHs concentration in which low molecular weight PAHs as the dominant PAHs. Meanwhile, high molecular weight PAHs distributed mainly in particle-phase. The particle-phase fraction Φ was obtained to understand the partitioning.

scholarly journals Measurements of gas and particle phase polycyclic aromatic hydrocarbons (PAHS) in Ho Chi Minh city in the period of 2017 to 2018

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
To Thi Hien ◽  
Nguyen Doan Thien Chi ◽  
Tran Anh Ngan ◽  
Duong Huu Huy
Keyword(s):  
Molecular Weight ◽  
Gas Phase ◽  
Aromatic Hydrocarbons ◽  
Total Concentration ◽  
Ambient Air ◽  
Ho Chi Minh City ◽  
Particle Phase ◽  
Particle Fraction ◽  
Total Pahs ◽  
Polycyclic Aromatic

This study was conducted to assess the distribution of polycyclic aromatic hydrocarbons (PAHs) between gas and particle phase in the ambient air in Ho Chi Minh City in the period of 2017 to 2018. Gas and particle phase PAHs samples were collected at five sites in Ho Chi Minh City in a period between March 2017 and February 2018. Particle phase PAHs were collected on glass fiber filters and gas phase PAHs were adsorbed on polyurethane foams (PUFs). Gas and particle phase PAHs were determined by using high-performance liquid chromatography method (HPLC-FLD). In the rainy season, the results shown that total PAHs concentrations in the gas phase was 43.16 ± 19.36 ng/m3 while that in the particle phase was 5.82 ± 3.96 ng/m3. In the dry season, total PAHs concentrations in the gas phase was 40.66 ± 15.14 ng/m3 and in the particle phase was 4.50 ± 2.54 ng/m3. The total concentration of 14 PAHs in the gas phase (42.08 ± 17.62 ng/m3) accounted for over 85% of the total concentration. High molecular weight PAHs (HMW-PAHs) had the highest concentration in the particle phase, accounting for about 78% of the total concentration of 14 PAHs. In contrast, in the gas phase, low molecular weight PAHs (LMW-PAHs) was dominated, accounting for over 65% of the total concentration of 14 PAHs. Particle fraction was obtained to understand the particle/gas phase partitioning of PAHs in ambient air in Ho Chi Minh City. Moreover, particle fraction and logPL0 have a non-linear correlation. Source apportionment of PAHs was carried out by using PMF model. The PMF results indicate four factors that affect PAHs concentrations in Ho Chi Minh City. In four factors, vehicular emission contributed strongly to PAHs concentrations.    

scholarly journals Identification and quantification of organic pollutants in the air of the city of Astana using solid phase microextraction

2017 ◽  
pp. 14-17
Author(s):  
Dina Orazbayeva ◽  
Ulzhalgas Karatayeva ◽  
Kulzhan Beysembayeva ◽  
Kulyash Meyramkulova
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Ambient Air ◽  
Average Concentration ◽  
Polycyclic Aromatic ◽  
Benzene Toluene ◽  
The City

Solid-phase microextraction in combination with gas chromatography and mass-spectrometry (GC-MS) was used for determination of benzene, toluene, ethylbenzene and o-xylene (BTEX), polycyclic aromatic hydrocarbons (PAH), and for identification of volatile organic compounds (VOCs) in ambient air of the city of Astana, Kazakhstan. The screening of the samples showed the presence of mono- and polycyclic aromatic hydrocarbons, alkanes, alkenes, phenols, and benzaldehydes. The concentrations of naphthalene were 5-7 times higher than the permissible value, it was detected in all studied air samples. Average concentration of naphthalene was 18.4 μg/m3, acenaphthylene – 0.54 μg/m3, acenaphthene – 1.63 μg/m3, fluorene – 0.79 μg/m3, anthracene – 3.27 μg/m3, phenanthrene – 0.22 μg/m3, fluorantene – 0.74 μg/m3, pyrene – 0.73 μg/m3. Average concentrations of BTEX in the studied samples were 31.1, 84.9, 10.8 and 11.6 μg/m3, respectively. Based on the statistical analysis of the concentrations of BTEX and PAH, the main source of city air pollution with them was assumed to be vehicle emissions.

scholarly journals Temporal Distribution and Gas/Particle Partitioning of Polycyclic Aromatic Hydrocarbons (PAHs) in the Atmosphere of Strasbourg, France

Atmosphere ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 337
Author(s):  
Supansa Chimjarn ◽  
Olivier Delhomme ◽  
Maurice Millet
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Solid Phase ◽  
Large City ◽  
Ambient Air ◽  
Temporal Variations ◽  
Diagnostic Ratios ◽  
Particulate Phase ◽  
Polycyclic Aromatic

Gas and particulate phase ambient air concentrations of polycyclic aromatic hydrocarbons (Ʃ16PAHs) were determined in Strasbourg, a large city located in the Alsace region of northeastern France, from May 2018 to March 2020, to study the evolution of their temporal variations and their potential origins. The analysis of PAHs was performed using a global analytical method permitting the quantification of pesticides, PAHs, and polychlorobiphenyls (PCBs). Filters and Carbon doped silicon carbide NMC@SiC foams were extracted by accelerated solvent extraction (ASE) followed by a solid-phase extraction (SPE). Afterwards, extracts were analyzed using gas chromatography coupled to tandem mass spectrometry (GC-MS/MS). Prior to analysis, a pre-concentration step based on solid-phase microextraction (SPME) was used with a polydimethylsiloxane (PDMS) 100 µm fiber. The average total (gas plus particulate) concentration of Ʃ16PAHs varied from 0.51 to 117.31 ng m−3 with a mean of 16.87 ng m−3, with higher concentrations in the cold season of more than 2.5-fold and 6-fold that in the warm season for the gas and particulate phases, respectively. Moreover, low molecular weight (LMW) (2-ring and 3-ring) and medium molecular weight (MMW) (4-ring) PAHs contribute dominantly to the gas phase, while the particulate phase is associated with MMW (4-ring) and high molecular weight (HMW) (5-ring and 6-ring) PAHs. Gas/particle partitioning coefficient (log Kp) was calculated, and values varied between −4.13 and −1.49. It can be seen that the log Kp increased with the molecular weight of the PAHs and that the log Kp is different between cold and warm seasons for HMW PAHs but not for LMW PAHs. Diagnostic ratios of PAHs, which were employed to estimate the primary source of PAHs in Strasbourg, indicate that fuel combustion and biomass/coal burning are the possible origins of PAHs in Strasbourg’s atmosphere.

scholarly journals Characteristics of polycyclic aromatic hydrocarbons emissions of diesel fuel from diesel generator

2013 ◽  
Vol 16 (3) ◽  
pp. 44-52
Author(s):  
Phuong Nu Thanh Ton ◽  
Vinh Xuan Le ◽  
Hien Thi To ◽  
Takenaka Norimichi
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Gas Phase ◽  
Aromatic Hydrocarbons ◽  
Diesel Fuel ◽  
Emission Factor ◽  
Particle Phase ◽  
Diesel Generator ◽  
Total Pahs ◽  
Polycyclic Aromatic

This study evaluated PM and total PAHs emission factor from the exhaust of diesel fuel on diesel generator. The testing was performed under an idling state. The result showed that concentration of PAHs in gas phase and particle phase was 180.12; 3.90 µg/m3, respectively. The PAHs compound in gas phase emission were mostly Naph, Ace; in particle phase emission were mostly Phe, Flu, Pyr. Emission factor of PM and PAHs were respectively 338.43 mg/m3, 7133.46 mg/L.

scholarly journals Emission sources, Characteristics and risk assessment of particulate bound Polycyclic Aromatic Hydrocarbons (PAHs) from traffic sites

2021 ◽  
Author(s):  
Balram Ambade ◽  
Amit Kumar ◽  
Mohd Latif
Keyword(s):  
Air Pollution ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Anthropogenic Activities ◽  
Ambient Air ◽  
Average Concentration ◽  
Polycyclic Aromatic ◽  
Standard Value ◽  
Pm2.5 Concentration ◽  
Total Average

Abstract Atmospheric PM2.5 size particulate-associated Polycyclic Aromatic Hydrocarbons (PAHs) were analyzed from December 2018 to May 2019 over three traffic sites of Chota Nagpur Plateau (CNP) of India were analyzed to study their temporal and seasonal variations. Over the last few decades, CNP becomes a hotspot of air pollution due to traffic and anthropogenic activities. The PM2.5 concentration was higher than the value given by the National Ambient Air Quality (NAAQ) standard value. The results show the total average concentration of PAHs was found 141.48±22.86, 163.80 ±30.43, and 171.60±26.23 ng/m3 over site (Adityapur) ADP, (Sakchi) SKI, and Mango (MGO), respectively. The PM2.5 total average concentration was found 67.91± 14.04, 79.70± 13.53, and 103.20± 21.77µg/m3 over site ADP, SKI, and MGO, respectively. Diagnostic ratio analysis reveals that the source of PM2.5 associated with PAHs was petrogenic, pyrogenic, coal combustion, and vehicular emission. Backward trajectories model and fire count data were also used for air parcel movement up to height 4500 m above the earth’s surface. The traffic campaign has provided a rare opportunity for the CNP region for the collection of more air pollution baseline data, which could be helpful in the formulation of air pollution reduction policies in the future

scholarly journals Source Identification of Polycyclic Aromatic Hydrocarbons in Water at Point of Effluent Discharge into the New Calabar River, Port Harcourt, Rivers State, Nigeria

2019 ◽  
pp. 343-349
Author(s):  
O. S. Edori ◽  
W. A. Iyama
Keyword(s):  
Molecular Weight ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Water Samples ◽  
Water Environment ◽  
Size Analysis ◽  
Molecular Weights ◽  
Polycyclic Aromatic ◽  
Pahs Concentration ◽  
High Level

Water samples from effluents discharge points were analyzed for polycyclic aromatic hydrocarbons (PAHs) concentration using chromatographic techniques. The result obtained showed the presence of all the PAHs categories in the water samples. The total concentrations of PAHs in the different location showed that Minipiti station was the highest (44.99 mg/L), which was followed by the values obtained at the Police Post station (36.89 mg/L) and finally, the lowest value was obtained at the Iwofe Jetty station (11.923 mg/L). Diagnostic analysis of the concentrations of the different PAHS concentrations based on the ratio of low molecular weight PAHs to high molecular weight PAHs (LMW/HMW), anthracene / anthracene + phenanthrene {An/(An + Phe)} fluoranthene/ fluoranthene + pyrene {Fl /(Fl + Pyr} and benzo[a] anthracene/ benzo[a]anthracene + chrysene {BaA/ (BaA + Chr)} showed the predominance of pyrogenic PAHs over petrogenic PAHs. Thus indicating more of human input sources than natural. Ring size analysis indicated the predominance of the higher molecular weights (4-6) rings over the lower molecular weights (2-3) rings. The implications of the high level of PAHs within the sampled environment should give warning signals to the user of the water environment’.

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