Academic Journal
Fe-catalyzed sulfide oxidation in hydrothermal plumes is a source of reactive oxygen species to the ocean
| العنوان: | Fe-catalyzed sulfide oxidation in hydrothermal plumes is a source of reactive oxygen species to the ocean |
|---|---|
| المؤلفون: | Shaw, Timothy, Luther, George, Rosas, Richard, Oldham, Véronique, Coffey, Nicole, Ferry, John, Dias, Dewamunnage, Yücel, Mustafa, de Chanvalon, Aubin Thibault |
| المساهمون: | department of chemistry and biochemistry university of south california, School of Marine Science and Policy, College of Earth, Ocean, and Environment Newark (CEOE), University of Delaware Newark -University of Delaware Newark, University of Delaware Newark, Middle East Technical University Ankara (METU), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 0027-8424. |
| بيانات النشر: | HAL CCSD National Academy of Sciences |
| سنة النشر: | 2021 |
| المجموعة: | HAL e2s UPPA (Université de Pau et des Pays de l'Adour) |
| مصطلحات موضوعية: | [SDE.MCG]Environmental Sciences/Global Changes, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment |
| الوصف: | International audience ; Historically, the production of reactive oxygen species (ROS) in the ocean has been attributed to photochemical and biochemical reactions. However, hydrothermal vents emit globally significant inventories of reduced Fe and S species that should react rapidly with oxygen in bottom water and serve as a heretofore unmeasured source of ROS. Here, we show that the Fe-catalyzed oxidation of reduced sulfur species in hydrothermal vent plumes in the deep oceans supported the abiotic formation of ROS at concentrations 20 to 100 times higher than the average for photoproduced ROS in surface waters. ROS (measured as hydrogen peroxide) were determined in hydrothermal plumes and seeps during a series of Alvin dives at the North East Pacific Rise. Hydrogen peroxide inventories in emerging plumes were maintained at levels proportional to the oxygen introduced by mixing with bottom water. Fenton chemistry predicts the production of hydroxyl radical under plume conditions through the reaction of hydrogen peroxide with the abundant reduced Fe in hydrothermal plumes. A model of the hydroxyl radical fate under plume conditions supports the role of plume ROS in the alteration of refractory organic molecules in seawater. The ocean’s volume circulates through hydrothermal plumes on timescales similar to the age of refractory dissolved organic carbon. Thus, plume-generated ROS can initiate reactions that may affect global ocean carbon inventories. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-03366294; https://hal.science/hal-03366294; https://hal.science/hal-03366294/document; https://hal.science/hal-03366294/file/Shaw%20et%20al.%20-%202021%20-%20Fe-catalyzed%20sulfide%20oxidation%20in%20hydrothermal%20plu.pdf |
| DOI: | 10.1073/pnas.2026654118 |
| الاتاحة: | https://hal.science/hal-03366294 https://hal.science/hal-03366294/document https://hal.science/hal-03366294/file/Shaw%20et%20al.%20-%202021%20-%20Fe-catalyzed%20sulfide%20oxidation%20in%20hydrothermal%20plu.pdf https://doi.org/10.1073/pnas.2026654118 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.C8A30DDA |
| قاعدة البيانات: | BASE |
| DOI: | 10.1073/pnas.2026654118 |
|---|