Source Profiles of Volatile Organic Compounds from Biomass Burning in Yangtze River Delta, China

Wang, Hongli; Lou, Shengrong; Huang, Cheng; Qiao, Liping; Tang, Xibin; Chen, Changhong; Zeng, Limin; Wang, Qian; Zhou, Min; Lü, Sihua; Yu, Xiangyao

doi:10.4209/aaqr.2013.05.0174

Cited by 86 publications

(39 citation statements)

References 20 publications

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“…Six different concentrations of a standard sample (0.03–0.25 ppbv) were used to calibrate the GC‐MS/FID every 2 weeks. Further details about the detection limits and the quality assurance/quality control of this instrument can be found in Wang et al [] and X. P. Lyu et al [].…”

Section: Methodsmentioning

confidence: 99%

Radical budget and ozone chemistry during autumn in the atmosphere of an urban site in central China

Chen²,

Wang

et al. 2017

JGR Atmospheres

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The ROx (=OH + HO2 + RO2) budget and O3 production at an urban site in central China (Wuhan) during autumn were simulated and analyzed for the first time using a UW Chemical Model 0‐D box model constrained by in situ observational data. The daytime average OH, HO2, and RO2 concentrations were 2.2 × 106, 1.0 × 108, and 5.2 × 107 molecules cm−3, respectively. The average daytime O3 production rate was 8.8 ppbv h−1, and alkenes were the most important VOC species for O3 formation (contributing 45%) at this site. Our sensitivity test indicated that the atmospheric environment in Wuhan during autumn belongs to the VOC‐limited regime. The daily average HONO concentration at this site during the study period reached 1.1 ppbv and played an important role in the oxidative capacity of the atmosphere. Without the source of excess HONO, the average daytime OH, HO2, RO2, and O3 production rates decreased by 36%, 26%, 27%, and 31% respectively. A correlation between the HONO to NO2 heterogeneous conversion efficiency and PM2.5 × SWR was found at this site; based on this relationship, if the PM2.5 concentration met the World Health Organization air quality standard (25 µg m−3), the O3 production rate in this city would decrease by 19% during late autumn. The burning of agricultural biomass severely affected the air quality in Wuhan during summer and autumn. Agricultural burning was found to account for 18% of the O3 formation during the study period. Our results suggest that VOC control and a ban on agricultural biomass burning should be considered as high‐priority measures for improving the air quality in this region.

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Section: Methodsmentioning

confidence: 99%

Radical budget and ozone chemistry during autumn in the atmosphere of an urban site in central China

Chen²,

Wang

et al. 2017

JGR Atmospheres

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“…Moreover, biomass and biofuel burning could contribute up to 70 % of the global secondary organic aerosol (SOA) burden (Shrivastava et al, 2015) and hence influence the seasonal variation of global SOA (Tsigaridis et al, 2014). Since it produces large amounts of primary and secondary pollutants, it is essential to characterize primary emissions and photochemical evolution of biomass burning in order to better understand its impacts on air quality (Huang et al, 2014), human health (Alves et al, 2015) and climate change (Andreae et al, 2004;Koren et al, 2004;Laskin et al, 2015;.…”

Section: Z Fang Et Al: Open Burning Of Rice Corn and Wheat Strawsmentioning

confidence: 99%

Open burning of rice, corn and wheat straws: primary emissions, photochemical aging, and secondary organic aerosol formation

et al. 2017

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Abstract. Agricultural residues are among the most abundant biomass burned globally, especially in China. However, there is little information on primary emissions and photochemical evolution of agricultural residue burning. In this study, indoor chamber experiments were conducted to investigate primary emissions from open burning of rice, corn and wheat straws and their photochemical aging as well. Emission factors of NO x , NH 3 , SO 2 , 67 non-methane hydrocarbons (NMHCs), particulate matter (PM), organic aerosol (OA) and black carbon (BC) under ambient dilution conditions were determined. Olefins accounted for > 50 % of the total speciated NMHCs emission (2.47 to 5.04 g kg −1 ), indicating high ozone formation potential of straw burning emissions. Emission factors of PM (3.73 to 6.36 g kg −1 ) and primary organic carbon (POC, 2.05 to 4.11 gC kg −1 ), measured at dilution ratios of 1300 to 4000, were lower than those reported in previous studies at low dilution ratios, probably due to the evaporation of semi-volatile organic compounds under high dilution conditions. After photochemical aging with an OH exposure range of (1.97-4.97) × 10 10 molecule cm −3 s in the chamber, large amounts of secondary organic aerosol (SOA) were produced with OA mass enhancement ratios (the mass ratio of total OA to primary OA) of 2.4-7.6. The 20 known precursors could only explain 5.0-27.3 % of the observed SOA mass, suggesting that the major precursors of SOA formed from open straw burning remain unidentified. Aerosol mass spectrometry (AMS) signaled that the aged OA contained less hydrocarbons but more oxygen-and nitrogencontaining compounds than primary OA, and carbon oxidation state (OS c ) calculated with AMS resolved O / C and H / C ratios increased linearly (p < 0.001) with OH exposure with quite similar slopes.

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“…Volatile organic compounds (VOC) have been known to cause both acute and chronic health effects, especially on the respiratory system. Numerous studies indicated that various VOC species are emitted from agriculture residue burning [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Grid Resolution in Modeling of Air Pollution from Open Burning

Sirithian

Thepanondh

2016

Atmosphere

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Influences of different computational grid resolutions on modeled ambient benzene concentrations from open burning were assessed in this study. The CALPUFF (California Puff Mesoscale Dispersion Model) was applied to simulate maximum ground level concentration over the modeling domain of 100ˆ100 km 2 . Meteorological data of the year 2014 was simulated from the Weather Research and Forecasting (WRF) model. Four different grid resolutions were tested including 0.75 km, 1 km, 2 km and 3 km resolutions. Predicted values of the maximum 24-h average concentrations obtained from the finest grid resolution (0.75 km) were set as reference values. In total, there were 1089 receptors used as reference locations for comparison of the results from different computational grid resolutions. Comparative results revealed that the larger the grid resolution, the higher the over-prediction of the results. Nevertheless, it was found that increasing the grid resolution from the finest resolution (0.75 km) to coarser resolutions (1 km, 2 km and 3 km) resulted in reduction of computational time by approximately 66%, 97% and >99% as compared with the reference grid resolution, respectively. Results revealed that the grid resolution of 1 km is the most appropriate resolution with regard to both accuracy of predicted data and acceptable computational time for the model simulation of the open burning source.

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Source Profiles of Volatile Organic Compounds from Biomass Burning in Yangtze River Delta, China

Cited by 86 publications

References 20 publications

Radical budget and ozone chemistry during autumn in the atmosphere of an urban site in central China

Radical budget and ozone chemistry during autumn in the atmosphere of an urban site in central China

Open burning of rice, corn and wheat straws: primary emissions, photochemical aging, and secondary organic aerosol formation

Influence of Grid Resolution in Modeling of Air Pollution from Open Burning

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