Probing the Photochemical Formation of Hydroxyl Radical from Dissolved Organic Matter: Insights into the H2O2-Dependent Pathway DOI Creative Commons
Kai Cheng,

Hang Li,

Juliana R. Laszakovits

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

This study quantifies the contribution of H2O2-dependent pathway to hydroxyl radical (•OH) production from photolysis dissolved organic matter (DOM). •OH formation rates were cross-validated using benzoate and terephthalate as probe compounds for diverse DOM sources (reference isolates whole waters). Catalase addition revealed that accounts 10-20% total in isolate materials, but no significant correlation was observed between ambient iron (Fe) concentrations formation. lack likely due lower Fe levels isolated thus limiting concentration photochemically produced Fe(II) available reaction with H2O2. Notably, contributed 11 ± 3% Pony Lake fulvic acid, which had lowest content, implicating additional H2O2-driven mechanisms independent Fe. Experiments model acetophenone p-benzoquinone indicated triplet reactions However, rate increased 6-fold when H2O2 reduced by ketyl radicals formed excited 2,4,6-trimethylphenol. advances knowledge photolysis, providing insight into role aquatic photochemical processes.

Language: Английский

Environmental Implications of Hydroxyl Radicals (•OH) DOI
Sasho Gligorovski, Rafal Strekowski,

Stéphane Barbati

et al.

Chemical Reviews, Journal Year: 2015, Volume and Issue: 115(24), P. 13051 - 13092

Published: Dec. 2, 2015

The hydroxyl radical (•OH) is one of the most powerful oxidizing agents, able to react unselectively and instantaneously with surrounding chemicals, including organic pollutants inhibitors. •OH radicals are omnipresent in environment (natural waters, atmosphere, interstellar space, etc.), biological systems where has an important role immunity metabolism. We provide extensive view on different environmental compartments laboratory systems, aim drawing more attention this emerging issue. Further research processes related chemistry highly demanded. A comprehensive understanding sources sinks their implications natural waters atmosphere crucial importance, way irradiated chromophoric dissolved matter surface yields through H2O2-independent pathway, assessment relative importance gas-phase vs aqueous-phase reactions many atmospheric components. Moreover, considering fact that people spend so much time dwellings than outside, impact reactivity indoor health well-being another topic great concern.

Language: Английский

Citations

1289
Occurrence, Fate, Behavior and Ecotoxicological State of Phthalates in Different Environmental Matrices DOI
Sopheak Net, Richard Sempéré,

Anne Delmont

et al.

Environmental Science & Technology, Journal Year: 2015, Volume and Issue: 49(7), P. 4019 - 4035

Published: March 2, 2015

Because of their large and widespread application, phthalates or phthalic acid esters (PAEs) are ubiquitous in all the environmental compartements. They have been widely detected throughout worldwide environment. Indoor air where people spend 65–90% time is also highly contaminated by various PAEs released from plastics, consumer products as well ambient suspended particulate matter. most common chemicals that humans contact with daily. Based on exposure mechanisms, including ingestion food, drinking water, dust/soil, inhalation dermal daily intake may reach values high 70 μg/kg/day. involved endocrine disrupting effects, namely, upon reproductive physiology different species fish mammals. present a variety additional toxic effects for many other terrestrial aquatic fauna flora. Therefore, presence environment has attracted considerable attention due to potential impacts ecosystem functioning public health. This paper synthesis extensive literature data behavior, transport, fate ecotoxicological state matrices: air, sediment, sludge, wastewater, soil, biota. First, origins physicochemical properties control transport reviewed. Second, compilation fate, adverse human health legislation, restrictions, based presented.

Language: Английский

Citations

1032
Tropospheric Aqueous-Phase Chemistry: Kinetics, Mechanisms, and Its Coupling to a Changing Gas Phase DOI Creative Commons
Hartmut Herrmann, Thomas Schaefer, Andreas Tilgner

et al.

Chemical Reviews, Journal Year: 2015, Volume and Issue: 115(10), P. 4259 - 4334

Published: May 7, 2015

ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTTropospheric Aqueous-Phase Chemistry: Kinetics, Mechanisms, and Its Coupling to a Changing Gas PhaseHartmut Herrmann*, Thomas Schaefer, Andreas Tilgner, Sarah A. Styler, Christian Weller, Monique Teich, Tobias OttoView Author Information Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany*Phone: ++49341 2717 7024. Fax: ++ 49341 99 E-mail: [email protected]Cite this: Chem. Rev. 2015, 115, 10, 4259–4334Publication Date (Web):May 7, 2015Publication History Received15 August 2014Published online7 May 2015Published inissue 27 2015https://doi.org/10.1021/cr500447kCopyright © 2015 American Chemical Society. This publication is licensed under these Terms of Use. Request reuse permissions Open Access the license indicated. Learn MoreArticle Views16652Altmetric-Citations385LEARN ABOUT THESE METRICSArticle Views are COUNTER-compliant sum full text article downloads since November 2008 (both PDF HTML) across all institutions individuals. These metrics regularly updated reflect usage leading up last few days.Citations number other articles citing this article, calculated by Crossref daily. Find more information about citation counts.The Altmetric Attention Score quantitative measure attention that research has received online. Clicking on donut icon will load page at altmetric.com with additional details score social media presence given article. how calculated. Share Add toView InAdd Full Text ReferenceAdd Description ExportRISCitationCitation abstractCitation referencesMore Options onFacebookTwitterWechatLinked InReddit (7 MB) Get e-AlertscloseSUBJECTS:Aerosols,Anions,Kinetic parameters,Organic reactions,pH e-Alerts

Language: Английский

Citations

606
Triplet state dissolved organic matter in aquatic photochemistry: reaction mechanisms, substrate scope, and photophysical properties DOI Creative Commons
Kristopher McNeill, Silvio Canonica

Environmental Science Processes & Impacts, Journal Year: 2016, Volume and Issue: 18(11), P. 1381 - 1399

Published: Jan. 1, 2016

Excited triplet states of chromophoric dissolved organic matter (3CDOM*) play a major role among the reactive intermediates produced upon absorption sunlight by surface waters.

Language: Английский

Citations

529
Marine plastic litter: the unanalyzed nano-fraction DOI
Julien Gigault,

Boris Pedrono,

Benoît Maxit

et al.

Environmental Science Nano, Journal Year: 2016, Volume and Issue: 3(2), P. 346 - 350

Published: Jan. 1, 2016

In this work, we present for the first time undeniable evidence of nano-plastic occurrence due to solar light degradation marine micro-plastics under controlled and environmentally representative conditions.

Language: Английский

Citations

390
Environmental effects of ozone depletion, UV radiation and interactions with climate change: UNEP Environmental Effects Assessment Panel, update 2017 DOI
A. F. Bais, Robyn Lucas, Janet F. Bornman

et al.

Photochemical & Photobiological Sciences, Journal Year: 2018, Volume and Issue: 17(2), P. 127 - 179

Published: Feb. 1, 2018

Language: Английский

Citations

311
Solar disinfection is an augmentable, in situ -generated photo-Fenton reaction—Part 1: A review of the mechanisms and the fundamental aspects of the process DOI
Stefanos Giannakis, María Inmaculada Polo-López, Dorothee Spuhler

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2016, Volume and Issue: 199, P. 199 - 223

Published: June 11, 2016

Language: Английский

Citations

291
Probe Compounds to Assess the Photochemical Activity of Dissolved Organic Matter DOI
Fernando L. Rosario‐Ortiz, Silvio Canonica

Environmental Science & Technology, Journal Year: 2016, Volume and Issue: 50(23), P. 12532 - 12547

Published: Oct. 13, 2016

The photochemical properties of dissolved organic matter (DOM) have been interest to scientists and engineers since the 1970s. Upon light absorption, chromophoric DOM (CDOM) can sensitize formation different short-lived reactive intermediates (RIs), including hydroxyl radical (•OH), singlet oxygen (1O2) superoxide anion (O2•-). In addition, a fraction excited states in CDOM decays into triplet (3CDOM*), which are also important transients environmental systems. These RIs significant impact on processes sunlit waters, degradation contaminants inactivation pathogens. Due their transient nature low steady-state concentrations, use common analytical techniques for direct measurement these species is impractical. Therefore, specific probe compounds (PCs) used. PCs include furfuryl alcohol 1O2, terephthalic acid •OH. this publication, we present critical review assessment photochemically generated RIs. We first introduce concept PC, kinetic treatment necessary assumptions needed conduct measurement. Afterward, short overviews most studied relevant issues regarding finalize by offering recommendations photochemistry.

Language: Английский

Citations

260
Sunlight-mediated inactivation of health-relevant microorganisms in water: a review of mechanisms and modeling approaches DOI Creative Commons
Kara L. Nelson, Alexandria B. Boehm, Robert J. Davies‐Colley

et al.

Environmental Science Processes & Impacts, Journal Year: 2018, Volume and Issue: 20(8), P. 1089 - 1122

Published: Jan. 1, 2018

Inactivation occursviadirect and indirect processes in sunlit waters.

Language: Английский

Citations

254
Aging of Atmospheric Brown Carbon Aerosol DOI
Rachel F. Hems, Elijah G. Schnitzler, Carolyn Liu-Kang

et al.

ACS Earth and Space Chemistry, Journal Year: 2021, Volume and Issue: 5(4), P. 722 - 748

Published: April 5, 2021

Emitted by numerous primary sources and formed secondary sources, atmospheric brown carbon (BrC) aerosol is chemically complex. As BrC ages in the atmosphere via a variety of chemical physical processes, its composition optical properties change significantly, altering impacts on climate. Research past decade has considerably expanded our understanding reactions both gas condensed phases. We review these recent advances aging chemistry with focus phase leading to formation, aqueous in-cloud particle reactions. Connections are made between single component proxies more complex mixtures as well laboratory field measurements chemistry. General conclusions that can darken particles over short time scales hours close source considerable photobleaching oxidative whitening will occur when day or removed from source.

Language: Английский

Citations

239