Contribution from Selected Organic Species to PM2.5 Aerosol during a Summer Field Campaign at K-Puszta, Hungary

Maenhaut, Willy; Chi, Xuguang; Wang, Wan; Cafmeyer, Jan; Yasmeen, Farhat; Vermeylen, Reinhilde; Szmigielska, Katarzyna; Janssens, Ivan A.; Claeys, Magda

doi:10.3390/atmos8110221

Cited by 9 publications

(8 citation statements)

References 48 publications

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“…39 Previously, pinonic acid was shown to comprise ∼2.5% of the atmospheric organic carbon in a similar pine dominated environment. 40 Thus, the campaign average organic aerosol mass concentration of 1.96 μg m −3 indicates around 6 × 10 8 molecule cm −3 (24 pptv) of pinonic acid in the gas phase, which is in reasonable agreement with modeled pinonic acid concentrations in pine-dominated areas during the summertime. Inclusion of reactions with Criegee intermediates, with rate coefficients obtained from the SAR results shown in Table S3, significantly reduces (by up to 90%) the modeled pinonic acid concentration, as shown in Figure 7.…”

Section: Atmospheric Implicationssupporting

confidence: 74%

Criegee Intermediate Reactions with Carboxylic Acids: A Potential Source of Secondary Organic Aerosol in the Atmosphere

Chhantyal-Pun

Rotavera

McGillen

et al. 2018

ACS Earth Space Chem.

112

139

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Trace atmospheric concentrations of carboxylic acids have a potent effect upon the environment, where they modulate aqueous chemistry and perturb Earth's radiative balance. Halogenated carboxylic acids are produced by the tropospheric oxidation of halocarbons and are considered persistent pollutants because of their weak tropospheric and aqueous sinks. However, recent studies reported rapid reactions between selected carboxylic acids and Criegee intermediates, which may provide an efficient gas-phase removal process. Accordingly, absolute S8), predicted vapor pressures and partitioning coefficients (Tables S9 and S10) and secondary organic aerosol box modelling (Figure S9). Experimental data, and outputs of the quantum chemistry calculations and the SOA box model are archived in the University of Bristol's Research Data Storage Facility

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Section: Atmospheric Implicationssupporting

confidence: 74%

Criegee Intermediate Reactions with Carboxylic Acids: A Potential Source of Secondary Organic Aerosol in the Atmosphere

Chhantyal-Pun

Rotavera

McGillen

et al. 2018

ACS Earth Space Chem.

112

139

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“…The concentrations of all tracers are, as expected, elevated during summer and suppressed during winter. MBTCA was during spring and summer on similar concentration levels to what has been found in previous European studies (Kourtchev et al, 2009;Kristensen and Glasius, 2011;Maenhaut et al, 2017;Martinsson et al, 2017c). Elevated MBTCA concentrations was further associated to raising temperatures (R 2 = 0.23, p < 0.01), an effect that was peculiarly prominent during spring (R 2 = 0.56, p < 0.01) and summer (R 2 = 0.27, p < 0.01).…”

Section: Accepted Manuscriptsupporting

confidence: 84%

On the Relationship of Biogenic Primary and Secondary Organic Aerosol Tracer Compounds on the Aethalometer Model Parameters

Martinsson

Sporre

Pédehontaa-Hiaa

et al. 2020

Aerosol Air Qual. Res.

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The aethalometer model has shown to offer a fast, inexpensive and robust method for source apportionment. The method relies on aerosol light absorption attribution, mass balance of the total carbon and results in a fraction of unaccounted, residual carbon that has been associated to biogenic carbon due to its presumably non-light absorbing properties. This residual carbon and its relation to tracers of biogenic primary and secondary organic aerosol was investigated at a rural measurement station in Sweden. Special focus is devoted to 3-methyl-1,2,3butanetricarboxylic acid (MBTCA), a second-generation oxidation compound in biogenic secondary organic aerosols. The results show that the residual carbon and the biogenic tracers show a high degree of correlation and that the tracers were highly seasonally dependent with largest carbon contributions during summer. MBTCA showed positive correlation with the aethalometer model derived absorption coefficients from fossil fuel carbonaceous aerosol, stressing the suspicion that biogenic aerosol might be falsely apportioned to fossil fuel carbon in the aethalometer model. MBTCA showed an increasing degree of correlation with higher aethalometer absorption coefficient wavelengths. However, spectrophotometric analysis revealed that the ambient concentrations of MBTCA are most likely to low to give a significant response in the aethalometer. These results support the application of MBTCA as a molecular tracer for biogenic secondary organic aerosol and indicates that a large fraction of the aethalometer model residual carbon is of biogenic origin. Future studies should investigate the light absorbing properties of precursor monoterpenes such as α-pinene, their oxidation products and eventual influence on the aethalometer model.

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“…These are in turn detected by the means of a quadrupole mass spectrometer [111]. This method provides a sensitivity which is comparable to GC/MS, however in contrast to GC/MS affords the robust analysis of a sample without any pre-processing or pre-concentration [112,113].…”

Section: Strategies For Improved Detectionmentioning

confidence: 99%

Detection of Fungi and Oomycetes by Volatiles Using E-Nose and SPME-GC/MS Platforms

et al. 2020

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Fungi and oomycetes release volatiles into their environment which could be used for olfactory detection and identification of these organisms by electronic-nose (e-nose). The aim of this study was to survey volatile compound emission using an e-nose device and to identify released molecules through solid phase microextraction–gas chromatography/mass spectrometry (SPME–GC/MS) analysis to ultimately develop a detection system for fungi and fungi-like organisms. To this end, cultures of eight fungi (Armillaria gallica, Armillaria ostoyae, Fusarium avenaceum, Fusarium culmorum, Fusarium oxysporum, Fusarium poae, Rhizoctonia solani, Trichoderma asperellum) and four oomycetes (Phytophthora cactorum, P. cinnamomi, P. plurivora, P. ramorum) were tested with the e-nose system and investigated by means of SPME-GC/MS. Strains of F. poae, R. solani and T. asperellum appeared to be the most odoriferous. All investigated fungal species (except R. solani) produced sesquiterpenes in variable amounts, in contrast to the tested oomycetes strains. Other molecules such as aliphatic hydrocarbons, alcohols, aldehydes, esters and benzene derivatives were found in all samples. The results suggested that the major differences between respective VOC emission ranges of the tested species lie in sesquiterpene production, with fungi emitting some while oomycetes released none or smaller amounts of such molecules. Our e-nose system could discriminate between the odors emitted by P. ramorum, F. poae, T. asperellum and R. solani, which accounted for over 88% of the PCA variance. These preliminary results of fungal and oomycete detection make the e-nose device suitable for further sensor design as a potential tool for forest managers, other plant managers, as well as regulatory agencies such as quarantine services.

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Contribution from Selected Organic Species to PM2.5 Aerosol during a Summer Field Campaign at K-Puszta, Hungary

Cited by 9 publications

References 48 publications

Criegee Intermediate Reactions with Carboxylic Acids: A Potential Source of Secondary Organic Aerosol in the Atmosphere

Criegee Intermediate Reactions with Carboxylic Acids: A Potential Source of Secondary Organic Aerosol in the Atmosphere

On the Relationship of Biogenic Primary and Secondary Organic Aerosol Tracer Compounds on the Aethalometer Model Parameters

Detection of Fungi and Oomycetes by Volatiles Using E-Nose and SPME-GC/MS Platforms

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