气候变化领域集成服务门户(CCPortal): Fe-catalyzed sulfide oxidation in hydrothermal plumes is a source of reactive oxygen species to the ocean

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DOI	10.1073/pnas.2026654118
	Fe-catalyzed sulfide oxidation in hydrothermal plumes is a source of reactive oxygen species to the ocean
	Shaw T.J.; Luther G.W.; III; Rosas R.; Oldham V.E.; Coffey N.R.; Ferry J.L.; Dias D.M.C.; Yücel M.; de Chanvalon A.T.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:40
英文摘要	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. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Carbon cycle; HO; Hydrogen peroxide; Sulfide oxidation catalysis; Superoxide
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238347
作者单位	Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, United States; School of Marine Science and Policy, University of Delaware, Lewes, DE 19958, United States; Institute of Marine Sciences, Middle East Technical University, Mersin, 33731, Turkey; Department of Oceanography, Texas A&M University, College Station, TX 77843, United States; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States; CNRS, Institute of Analytical Sciences and Physical-Chemistry for the Environment and Materials, Pau, 5254, France
推荐引用方式 GB/T 7714	Shaw T.J.,Luther G.W.,III,et al. Fe-catalyzed sulfide oxidation in hydrothermal plumes is a source of reactive oxygen species to the ocean[J],2021,118(40).
APA	Shaw T.J..,Luther G.W..,III.,Rosas R..,Oldham V.E..,...&de Chanvalon A.T..(2021).Fe-catalyzed sulfide oxidation in hydrothermal plumes is a source of reactive oxygen species to the ocean.Proceedings of the National Academy of Sciences of the United States of America,118(40).
MLA	Shaw T.J.,et al."Fe-catalyzed sulfide oxidation in hydrothermal plumes is a source of reactive oxygen species to the ocean".Proceedings of the National Academy of Sciences of the United States of America 118.40(2021).