A new source of ammonia and carboxylic acids in cloud water: The first evidence of photochemical process involving an iron-amino acid complex

Marion, Aurélie; Brigante, Marcello; Mailhot, Gilles

doi:10.1016/j.atmosenv.2018.09.060

Cited by 19 publications

(15 citation statements)

References 39 publications

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“…Recently, amino acids reactivity was investigated in cloud water: irradiation of tryptophan in the presence of H2O2 in synthetic cloud water evidences the production of acetic and formic acids and the degradation mechanism was investigated by mass spectrometry [47]. The photochemical reactivity of Fe(III)-amino acid complex in atmospheric waters was studied by Marion et al [146]. The photolysis of Fe(III)-aspartate complex under sun-simulated conditions leads to the formation HO • -mediated oxidation of organic compounds can lead to the fragmentation or to the formation of oxidized organic species, introducing different functional group, to result in the complete mineralization to CO 2 .…”

Section: Reactivitymentioning

confidence: 99%

Photochemistry of the Cloud Aqueous Phase: A Review

et al. 2020

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This review paper describes briefly the cloud aqueous phase composition and deeply its reactivity in the dark and mainly under solar radiation. The role of the main oxidants (hydrogen peroxide, nitrate radical, and hydroxyl radical) is presented with a focus on the hydroxyl radical, which drives the oxidation capacity during the day. Its sources in the aqueous phase, mainly through photochemical mechanisms with H2O2, iron complexes, or nitrate/nitrite ions, are presented in detail. The formation rate of hydroxyl radical and its steady state concentration evaluated by different authors are listed and compared. Finally, a paragraph is also dedicated to the sinks and the reactivity of the HO• radical with the main compounds found in the cloud aqueous phase. This review presents an assessment of the reactivity in the cloud aqueous phase and shows the significant potential impact that this medium can have on the chemistry of the atmosphere and more generally on the climate.

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Section: Reactivitymentioning

confidence: 99%

Photochemistry of the Cloud Aqueous Phase: A Review

et al. 2020

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“…When the additional effect of 1 O 2 was considered, MET (methionine), TRP (tryptophan), TYR (tyrosine), and HIS (histidine) remained the most degraded AAs (McGregor and Anastasio, 2001). Among other mechanisms, this fast degradation could explain why these AAs are usually among the less concentrated in aerosols (Barbaro et al, 2015(Barbaro et al, , 2011Matsumoto and Uematsu, 2005;Helin et al, 2017;Mashayekhy Rad et al, 2019;Mace et al, 2003b;Samy et al, 2013;Yang et al, 2004), in rain (Mace et al, 2003b;Xu et al, 2019;Yan et al, 2015), or in clouds (Triesch et al, 2021). The characterization of amino acids in dew showed differences depending on seasons, meteorological parameters, and irradiation conditions (Scheller, 2001).…”

Section: Introductionmentioning

confidence: 99%

Biotic and abiotic transformation of amino acids in cloud water: experimental studies and atmospheric implications

et al. 2021

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Abstract. The interest in organic nitrogen and particularly in quantifying and studying the fate of amino acids (AAs) has been growing in the atmospheric-science community. However very little is known about biotic and abiotic transformation mechanisms of amino acids in clouds. In this work, we measured the biotransformation rates of 18 amino acids with four bacterial strains (Pseudomonas graminis PDD-13b-3, Rhodococcus enclensis PDD-23b-28, Sphingomonas sp. PDD-32b-11, and Pseudomonas syringae PDD-32b-74) isolated from cloud water and representative of this environment. At the same time, we also determined the abiotic (chemical, OH radical) transformation rates within the same solutions mimicking the composition of cloud water. We used a new approach by UPLC–HRMS (ultra-performance liquid chromatography–high-resolution mass spectrometry) to quantify free AAs directly in the artificial-cloud-water medium without concentration and derivatization. The experimentally derived transformation rates were used to compare their relative importance under atmospheric conditions with loss rates based on kinetic data of amino acid oxidation in the aqueous phase. This analysis shows that previous estimates overestimated the abiotic degradation rates and thus underestimated the lifetime of amino acids in the atmosphere, as they only considered loss processes but did not take into account the potential transformation of amino acids into each other.

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“…For anions, a Dionex DX320 system equipped with an IonPac AS11 column and a KOH elution in gradient mode were used. For cations, a Dionex ICS-1500 system equipped an Ion-Pac CS16 column and a metasulfonic acid (MSA) eluent were employed (Marion et al, 2018).…”

Section: Irradiation Experimentsmentioning

confidence: 99%

Phenanthrene decomposition in soil washing effluents using UVB activation of hydrogen peroxide and peroxydisulfate

et al. 2021

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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A new source of ammonia and carboxylic acids in cloud water: The first evidence of photochemical process involving an iron-amino acid complex

Cited by 19 publications

References 39 publications

Photochemistry of the Cloud Aqueous Phase: A Review

Photochemistry of the Cloud Aqueous Phase: A Review

Biotic and abiotic transformation of amino acids in cloud water: experimental studies and atmospheric implications

Phenanthrene decomposition in soil washing effluents using UVB activation of hydrogen peroxide and peroxydisulfate

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