气候变化领域集成服务门户(CCPortal): Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide

CCPortal

DOI	10.1073/pnas.2002175117
	Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide
	Liu W.; Hao J.; Elzinga E.J.; Piotrowiak P.; Nanda V.; Yee N.; Falkowski P.G.
发表日期	2020
ISSN	0027-8424
起始页码	22698
结束页码	22704
卷号	117 期号:37
英文摘要	The oxidation states of manganese minerals in the geological record have been interpreted as proxies for the evolution of molecular oxygen in the Archean eon. Here we report that an Archean manganese mineral, rhodochrosite (MnCO3), can be photochemically oxidized by light under anoxic, abiotic conditions. Rhodochrosite has a calculated bandgap of about 5.4 eV, corresponding to light energy centering around 230 nm. Light at that wavelength would have been present on Earth’s surface in the Archean, prior to the formation of stratospheric ozone. We show experimentally that the photooxidation of rhodochrosite in suspension with light centered at 230 nm produced H2 gas and manganite (γ-MnOOH) with an apparent quantum yield of 1.37 × 10−3 moles hydrogen per moles incident photons. Our results suggest that manganese oxides could have formed abiotically on the surface in shallow waters and on continents during the Archean eon in the absence of molecular oxygen. © 2020 National Academy of Sciences. All rights reserved.
语种	英语
scopus关键词	carbonic acid derivative; hydrogen; manganese; manganese derivative; manganese oxide; manganite; mineral; oxygen; rhodochrosite; unclassified drug; Archean; Article; controlled study; geochemistry; headspace extraction; infrared spectroscopy; molecular evolution; oxidation; photogeochemistry; photon; photooxidation; photoreactivity; priority journal; quantum yield; scanning electron microscopy; stratosphere
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/160810
作者单位	Liu, W., Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States; Hao, J., Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, United States; Elzinga, E.J., Department of Earth and Environmental Sciences, Rutgers University–Newark, Newark, NJ 07102, United States; Piotrowiak, P., Department of Chemistry, Rutgers University–Newark, Newark, NJ 07102, United States; Nanda, V., Department of Biochemistry and Molecular Biology, Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ 08854, United States; Yee, N., Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States; Falkowski, P.G., Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States, Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, United States
推荐引用方式 GB/T 7714	Liu W.,Hao J.,Elzinga E.J.,et al. Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide[J],2020,117(37).
APA	Liu W..,Hao J..,Elzinga E.J..,Piotrowiak P..,Nanda V..,...&Falkowski P.G..(2020).Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide.Proceedings of the National Academy of Sciences of the United States of America,117(37).
MLA	Liu W.,et al."Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide".Proceedings of the National Academy of Sciences of the United States of America 117.37(2020).