Oxidation of sulphur compounds in the atmosphere: I. Rate constants of OH radical reactions with sulphur dioxide, hydrogen sulphide, aliphatic thiols and thiophenol

Barnes, Ian; Bastian, V.; Becker, K. H.; Fink, E.H.; Nelsen, W.

doi:10.1007/bf00053845

Cited by 57 publications

(60 citation statements)

References 51 publications

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“…The loss rate of CH3SH in chambers has also been measured relative to that for a standard compound such as C2H4 or C3H6 whose reactivity with OH is well understood [24,30]. These values of k 4 are listed in Table IV. All the flash photolysis studies (four studies of which three are from Georgia Tech [25,58,59]) agree that the 298 K value for the rate coeffi- …”

Section: Oh + Ch?sh Ch~3s + Hzo; Kqmentioning

confidence: 99%

Atmospheric oxidation of reduced sulfur species

Tyndall

Ravishankara

1991

Int J of Chemical Kinetics

302

249

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The kinetics of elementary gas phase reactions involved in the oxidation of reduced sulfur species, HzS, CS2, OCS, CH3SH, CH3SCH3, and CH3SSCH3, to SOz (or other products) are reviewed. The reactions with OH and NOa which are the processes that initiate the degradation of the above compounds have been evaluated. Reactions of key intermediates, HS, HSO, CH& and CHaSO, are discussed. Whenever possible, recommendations for the rate coefficients are made and the need for further work indicated. The review has been carried out with the atmospheric chemistry in mind by looking at the laboratory based kinetics data. This review also provides information that will help model the Earth's sulfur cycle.

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Section: Oh + Ch?sh Ch~3s + Hzo; Kqmentioning

confidence: 99%

Atmospheric oxidation of reduced sulfur species

Tyndall

Ravishankara

1991

Int J of Chemical Kinetics

302

249

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“…Ethyl mercaptan is highly reactive with OH radicals as a photolysis product in ambient air, and has a half-life time of 0.23 days (Barnes et al, 1986). The major contributor to the loss of ethyl mercaptan is likely its photolysis-related degradation.…”

Section: Zhu Et Al / Journal Of the Air And Waste Management Associatimentioning

confidence: 99%

Testing odorants recovery from a novel metallized fluorinated ethylene propylene gas sampling bag

Wen-da

Kozieł

Cai

et al. 2015

Journal of the Air & Waste Management Association

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Industry-standard Tedlar bags for odor sample collection from confined animal feeding operations (CAFOs) have been challenged by the evidence of volatile organic compound (VOC) losses and background interferences. Novel impermeable aluminum foil with a thin layer of fluorinated ethylene propylene (FEP) film on the surface that is in contact with a gas sample was developed to address this challenge. In this research, Tedlar and metallized FEP bags were compared for (a) recoveries of four characteristic CAFO odorous VOCs (ethyl mercaptan, butyric acid, isovaleric acid and p-cresol) after 30 min and 24 hr sample storage time and for (b) chemical background interferences. All air sampling and analyses were performed with solid-phase microextraction (SPME) followed by gas chromatography-mass spectroscopy (GC-MS). Mean target gas sample recoveries from metallized FEP bags were 25.9% and 28.0% higher than those in Tedlar bags, for 30 min and 24 hr, respectively. Metallized FEP bags demonstrated the highest p-cresol recoveries after 30-min and 24-hr storage, 96.1 ± 44.5% and 44.8 ± 10.2%, respectively, among different types of sampling bags reported in previous studies. However, a higher variability was observed for p-cresol recovery with metallized FEP bags. A 0% recovery of ethyl mercaptan was observed with Tedlar bags after 24-hr storage, whereas an 85.7 ± 7.4% recovery was achieved with metallized FEP bags. Recoveries of butyric and isovaleric acids were similar for both bag types. Two major impurities in Tedlar bags' background were identified as N,N-dimethylacetamide and phenol, while backgrounds of metallized FEP bags were significantly cleaner. Reusability of metallized FEP bags was tested. Implications: Caution is advised when using polymeric materials for storage of livestock-relevant odorous volatile organic compounds. The odorants loss with storage time confirmed that long-term storage in whole-air form is ill advised. A focused short-term odor sample containment should be biased toward the most inert material available relative to the highest impact target odorant. Metallized FEP was identified as such a material to p-cresol as the highest impact odorant from confined animal feeding operations. Metallized FEP bags have much cleaner background than commercial Tedlar bags do. Significantly higher recoveries of methyl mercaptan and p-cresol were also observed with metallized FEP bags. IntroductionIn recent decades, intensive large-scale livestock production has grown rapidly in the United States and other parts of the world. The large number of animals raised in concentrated animal feeding operations (CAFOs) can affect air quality by emissions of odor, volatile organic compounds (VOCs), NH 3 , H 2 S, greenhouse gases (GHGs), and particulate matter (PM) (National Research Council [NRC], 2003;Heber et al., 2006aHeber et al., , 2006bJacobson et al., 2008;Hoff et al., 2009). Air pollution and odor nuisance are a major challenge for livestock production (NRC, 2003;Kim et al., 2007;Parker et al., 2012;Cai et al., 20...

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“…The value measured in this study with 4.09×10 -4 mol m -3 NO presence agrees with the upper values previously reported. The upper values measured by the two relative methods in the literature might also be due to a large amount of NO x presence in the systems because of HONO and CH 3 ONO, respectively, used as OH precursors [8,14].…”

Section: Resultsmentioning

confidence: 99%

“…The rate constant for reaction (1) has been extensively studied, especially [5][6][7][8][9][10][11][12][13][14][15]. It is problematic to arbitrate which value is more accurate to be used for evaluating the influences of H 2 S. Lin et al [13] pointed out that HS formed in reaction (1) *Corresponding author (email: yjmu@rcees.ac.cn) and HSO formed via other secondary reaction in their system could make a significant contribution to the OH removal.…”

mentioning

confidence: 99%