首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Hydrogen and carbon isotope fractionation during experimental production of bacterial methane
Institution:1. Département de Géologie Dynamique, Université P. et M. Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France;2. Laboratoire de Biotechnologie-Environnement, Institut Français du Pétrole BP 311, 92506 Rueil-Malmaison Cedex, France;1. Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;2. Institute of Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavík, Iceland;3. Institut für Geowissenschaften, Goethe-Universität, Altenhöferallee 1, 60438 Frankfurt am Main, Germany;1. Department of Earth, Planetary, and Space Sciences, UCLA, Los Angeles, CA, USA;2. Université de Paris, Institut de physique du globe de Paris, CNRS, Paris, France;3. IFREMER, Unité des Géosciences Marines, 29280 Plouzané, France;4. Université de Bretagne Occidentale, Laboratoire Géosciences Océan, 29280 Plouzané, France;5. Thermo Fisher Scientific, Bremen, Germany;6. Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA;7. School of Oceanography, University of Washington, Seattle, USA;8. Department of Earth Sciences, Eidgenössische Technische Hochschule Zurich (ETH-Z), Zurich, Switzerland;1. School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China;2. Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China;3. Key Laboratory of Unconventional Oil and Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, China;4. College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;1. Department of Geological Sciences, Indiana University, Bloomington, IN 47405, USA;2. School of Public and Environmental Affairs, Indiana University, Bloomington, IN 47405, USA
Abstract:This paper presents C and H isotope compositions of compounds involved in methane production by pure cultures of Methanobacterium formicicum. The C isotope compositions of the methane produced and of the residual CO2 are compared to data observed in natural conditions in marine sediments. This comparison leads to further evidence that CO2 reduction is an important mechanism for microbial generation of methane in deep marine sediments. The H isotope compositions show involvment of the water hydrogen into methane as well as hydrogen exchange between water and molecular hydrogen in the course of CO2 reduction. A mechanism is proposed as a possible explanation for the data obtained involving conjugated reactions of CO2-reduction and enzymatic reduction of water.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号