Heterogeneous oxidation of SO2 by O3-aged black carbon and its dithiothreitol oxidative potential

Xu, Weiwei; Li, Qian; Shang, Jing; Liu, Jia; Feng, Xiang; Zhu, Tong

doi:10.1016/j.jes.2015.02.014

Cited by 29 publications

(35 citation statements)

References 21 publications

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“…The reactive uptake coefficients of NO 2 by SSA were quantified in the range of 10 −6 to 10 −4 , demonstrating the ability of ambient sea salt aerosols to take in chemical species like NO 2 (Harrison and Collins, 1998;Yabushita et al, 2009;Ye et al, 2010). The high uptake coefficients observed for SSA (6.0 × 10 −7 -3.0 × 10 −4 ) are probably attributed to the reactions of Cl − with dissolved NO 2 in the aqueous phase (Msibi et al, 1993;Harrison and Collins, 1998;Yabushita et al, 2009). The overlapped values of γ eqv and γ eff show that the NO 2 uptake by SSA is comparable to the uptake by the land surface or water bodies in coastal areas; therefore, it should be taken into account in atmospheric models.…”

Section: Nomentioning

confidence: 93%

“…In summary, the NO 2 uptake coefficients on liquid aerosol droplets can vary by 3 orders of magnitude with aerosol composition (10 −7 -10 −4 ). On liquid organic aerosols and sea salt aerosols, the uptake can reach up to 10 −6 -10 −4 via chemical reactions (Abbatt and Waschewsky, 1998;Ammann et al, 2005;Yabushita et al, 2009), which is significantly larger than the uptake on pure water of 10 −7 -10 −6 (Lee and Tang, 1988;Kleffmann et al, 1998;Gutzwiller et al, 2002). For liquid ammonium sulfate aerosols, discrepancies with 2 orders of magnitude (10 −6 -10 −4 ) in γ eff values are found, although the reasons for this are currently unknown (Harrison and Collins, 1998;.…”

Section: Nomentioning

confidence: 97%

“…Harrison and Collins (1998) reported a high γ eff of 5.4-5.8 × 10 −4 for NO 2 uptake on ammonium sulfate aerosols at high relative humidity (RH; RH = 50 %, 85 %). The presence of reactants such as inorganics of HSO − 3 or phenolic compounds in aqueous aerosols can promote the uptake significantly via chemical reactions with dissolved NO 2 to 10 −5 -10 −4 (Msibi et al, 1993;Lee and Tang, 1998;Spindler et al, 2003;Ammann et al, 2005;Yabushita et al, 2009;Su et al, 2008a;Cheng et al, 2016). Multiple measurements and modeling work have also pointed out that the high alkalinity of aqueous aerosols is key to promote the reactions and further increase the NO 2 uptake rates (Ammann et al, 2005;Herrmann et al, 2015;Cheng et al, 2016).…”

Section: Nomentioning

confidence: 99%

“…On pure water, the uptake is measured at 10 −7 -10 −6 (Lee and Tang, 1988;Kleffmann et al, 1998;Gutzwiller et al, 2002). On liquid organic aerosols and sea salt aerosols, the uptake can be effectively accelerated to 10 −6 -10 −4 via multiphase reactions (Abbatt and Waschewsky, 1998;Ammann et al, 2005;Yabushita et al, 2009). For ammonium sulfate aerosols, large discrepancies of 10 −6 -10 −4 for the initial γ eff are found, although the reasons for this are currently unknown (Harrison and Collins, 1998;.…”

Section: Large Variability Of γ Eff For So 2 and Nomentioning

confidence: 99%

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Relative importance of gas uptake on aerosol and ground surfaces characterized by equivalent uptake coefficients

Guo

et al. 2019

Atmos. Chem. Phys.

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Given the fact that most models have considered the uptakes of these species on the ground surface, we suggest also considering the following processes in atmospheric models: N 2 O 5 uptake by all types of aerosols, HNO 3 and SO 2 uptake by mineral dust and sea salt aerosols, H 2 O 2 uptake by mineral dust, NO 2 uptakes by sea salt aerosols and O 3 uptake by liquid organic aerosols.Published by Copernicus Publications on behalf of the European Geosciences Union.

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Section: Nomentioning

confidence: 93%

Section: Nomentioning

confidence: 97%

Section: Nomentioning

confidence: 99%

Section: Large Variability Of γ Eff For So 2 and Nomentioning

confidence: 99%

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Relative importance of gas uptake on aerosol and ground surfaces characterized by equivalent uptake coefficients

Guo

et al. 2019

Atmos. Chem. Phys.

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“…As shown in Table A.1, more than 3 orders of magnitude of variances are found for SO 2 and O 3 uptake on mineral dust depending on the gas concentration and aerosol components (Michel et al, 2002(Michel et al, , 2003Mogili et al, 2006;Ullerstam et al, 2002Ullerstam et al, , 2003Li et al, 2006). Large discrepancies also exist for SO 2 and HNO 3 uptake on soot (Longfellow et al, 2000;Saathoff et al, 2001;Xu et al, 2015). For H 2 O 2 , limited measurements of γ eff have been conducted for aerosols apart from mineral dust and soot.…”

Section: Aerosol Gas Uptake and The Effective Uptake Coefficient (γ Ementioning

confidence: 99%

Relative importance of gas uptake on aerosol and ground surfaces characterized by equivalent uptake coefficients

Li¹,

Ma²,

Su³

et al. 2019

Preprint

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Abstract. Quantifying the relative importance of gas uptake on the ground and aerosol surfaces helps to determine which processes should be included in atmospheric chemistry models. Gas uptake by aerosols is often characterized by an effective uptake coefficient (&#947;eff), whereas gas uptake on the ground is usually described by a deposition velocity (Vd). For efficient comparison, we introduce an equivalent uptake coefficient (&#947;eqv) at which the uptake flux of aerosols would equal that on the ground surface. If &#947;eff is similar to or larger than &#947;eqv, aerosol uptake is important and should be included in atmospheric models. In this study, we compare uptake fluxes in the planetary boundary layer (PBL) for different reactive trace gases (O3, NO2, SO2, N2O5, HNO3, H2O2), aerosol types (mineral dust, soot, organic aerosol, sea salt aerosol), environments (urban, agricultural land, Amazon forest, water body), seasons, and mixing heights. For all investigated gases, &#947;eqv ranges from 10&#8722;6&#8201;~&#8201;10&#8722;4 in polluted urban environments to 10&#8722;4&#8201;~&#8201;10&#8722;1 under pristine forest conditions. In urban areas, aerosol uptake is relevant for all species (&#947;eff&#8201;&#8805;&#8201;&#947;eqv) and should be considered in models. On the contrary, contributions of aerosol uptakes in Amazon forest are minor compared to the dry deposition. Phase state of aerosols could be one of the crucial factors influencing the uptake rates. Current models tend to underestimate the O3 uptake on liquid organic aerosols which can be important especially over regions with &#947;eff&#8201;&#8805;&#8201;&#947;eqv. H2O2 uptakes on a variety of aerosols is yet to be measured at laboratory and evaluated. Given the fact that most models have considered their uptakes on the ground surface, we suggest also considering the N2O5 uptake by all types of aerosols, HNO3 and H2O2 uptakes by mineral dust, O3 uptake by liquid organic aerosols and NO2, SO2, HNO3 uptakes by sea salt aerosols in atmospheric models.

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Exposure to environmental black carbon exacerbates nasal epithelial inflammation via the reactive oxygen species (ROS)–nucleotide‐binding, oligomerization domain–like receptor family, pyrin domain containing 3 (NLRP3)–caspase‐1–interleukin 1β (IL‐1β) pathway

Ouyang

Jiao

et al. 2020

Int Forum Allergy Rhinol

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Background Allergic rhinitis AR is an increasing challenge to public health worldwide Exposure to environmental black carbon BC is associated with increased risk of allergic rhinitis but the molecular mechanisms underlying its toxicity have not been fully elucidated The aims of the present study were therefore to determine the effect of BC on the expression of interleukin β IL-β and to investigate the mechanism underlying BC-induced IL-β production in pollen-sensitized human nasal epithelial cells hNECs Methods Nasal mucosal samples collected from patients undergoing nasal surgery were used to isolate and culture epithelial cells as air-liquid interface ALI cultures Cultures exposed to BC ± pollen allergen for hours were assessed for the presence of IL-β the production of reactive oxygen species ROS and activation of the nucleotidebinding oligomerization domain-like receptor family pyrin domain containing NLRP inflammasome Furthermore the mechanisms underlying BC ± pollen allergen-induced IL-β in hNECs were evaluated Results Exposure to BC significantly increased the production of IL-β and ROS and the expression of NLRP in hNECs compared with control all of which were significantly increased further by exposure to a combination of BC and pollen Incubation of hNECs with N-acetyl-L-cysteine NAC significantly attenuated BC ± polleninduced expression of ROS NLRP and IL-β NLRP and Caspase-inhibitors MCC and YVAD significantly inhibited IL-β expression and NLRP activation but not NLRP expression following exposure to BC ± pollen Conclusion These findings suggest that exposure to BC and pollen can exaggerate oxidative stress and significantly increase the expression of IL-β in hNECs and that this may involve a pathway integrating ROS-NLRP-Caspase-IL-β signaling © 2020 ARS-AAOA, LLC.

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Heterogeneous oxidation of SO2 by O3-aged black carbon and its dithiothreitol oxidative potential

Cited by 29 publications

References 21 publications

Relative importance of gas uptake on aerosol and ground surfaces characterized by equivalent uptake coefficients

Relative importance of gas uptake on aerosol and ground surfaces characterized by equivalent uptake coefficients

Relative importance of gas uptake on aerosol and ground surfaces characterized by equivalent uptake coefficients

Exposure to environmental black carbon exacerbates nasal epithelial inflammation via the reactive oxygen species (ROS)–nucleotide‐binding, oligomerization domain–like receptor family, pyrin domain containing 3 (NLRP3)–caspase‐1–interleukin 1β (IL‐1β) pathway

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