A mineral- based origin of Earth?s initial hydrogen peroxide and molecular oxygen
文献类型：期刊论文
| 作者 | He, Hongping1,7,8; Wu, Xiao1,8; Zhu, Jianxi1,7,8; Lin, Mang6,7,8; Lv, Ying1,5,8; Xian, Haiyang1,8; Yang, Yiping1,8; Lin, Xiaoju1,8; Li, Shan1,6,8; Li, Yiliang4 |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2023-03-28 |
| 卷号 | 120期号:13页码:10 |
| 关键词 | quartz surface radicals oxygen transfer life evolution |
| ISSN号 | 0027-8424 |
| DOI | 10.1073/pnas.2221984120 |
| 英文摘要 | Terrestrial reactive oxygen species (ROS) may have played a central role in the formation of oxic environments and evolution of early life. The abiotic origin of ROS on the Archean Earth has been heavily studied, and ROS are conventionally thought to have originated from H2O/CO2 dissociation. Here, we report experiments that lead to a mineral -based source of oxygen, rather than water alone. The mechanism involves ROS generation at abraded mineral-water interfaces in various geodynamic processes (e.g., water currents and earthquakes) which are active where free electrons are created via open -shell electrons and point defects, high pressure, water/ice interactions, and combinations of these pro-cesses. The experiments reported here show that quartz or silicate minerals may produce reactive oxygen-containing sites (ESiO center dot, ESiOO center dot) that initially emerge in cleaving Si-O bonds in silicates and generate ROS during contact with water. Experimental isotope -labeling experiments show that the hydroxylation of the peroxy radical (ESiOO center dot) is the predominant pathway for H2O2 generation. This heterogeneous ROS production chemistry allows the transfer of oxygen atoms between water and rocks and alters their isotopic compositions. This process may be pervasive in the natural environment, and mineral -based production of H2O2 and accompanying O2 could occur on Earth and potentially on other terrestrial planets, providing initial oxidants and free oxygen, and be a component in the evolution of life and planetary habitability.SignificanceMolecular oxygen (O2) is essential for respiration on today's Earth, while toxic to emerging anaerobic microbes or prebiotic chemistry in the Archean. Early life acquired a defensive ability against reactive oxygen species (ROS) in developing Archean oxic microenvironments. Detailed knowledge of coeval abiotic ROS sources is important for understanding the evolution of early life and planetary habitability. Mineral surfaces are known to produce ROS via splitting water. We experimentally find that ROS production at mineral-water interfaces derives oxygen from minerals as well. This reaction may be initiated by mechanical forces in various geodynamic processes, which deform minerals to produce surface radicals for releasing oxygen by interaction with water. Such rocky oxidants created opportunities for life and drove its early evolution. |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:001001368800011 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74304]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | He, Hongping; Thiemens, Mark H. |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 2.Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA 3.Tianjin Univ, Inst Surface Earth Syst Sci, Sch Earth Syst Sci, Tianjin 300072, Peoples R China 4.Univ Hong Kong, Dept Earth Sci, Hong Kong 999077, Peoples R China 5.Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 8.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Hongping,Wu, Xiao,Zhu, Jianxi,et al. A mineral- based origin of Earth?s initial hydrogen peroxide and molecular oxygen[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2023,120(13):10. |
| APA | He, Hongping.,Wu, Xiao.,Zhu, Jianxi.,Lin, Mang.,Lv, Ying.,...&Thiemens, Mark H..(2023).A mineral- based origin of Earth?s initial hydrogen peroxide and molecular oxygen.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,120(13),10. |
| MLA | He, Hongping,et al."A mineral- based origin of Earth?s initial hydrogen peroxide and molecular oxygen".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 120.13(2023):10. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。