HYDROGEN AND CARBON ISOTOPE FRACTIONATION DURING EXPERIMENTAL PRODUCTION OF BACTERIAL METHANE

作     者：BALABANE, M GALIMOV, E HERMANN, M LETOLLE, R 

作者机构：INST FRANCAIS PETRBIOTECHNOL ENVIRONNEMENT LABF-92506 RUEIL MALMAISONFRANCE 

出 版 物：《ORGANIC GEOCHEMISTRY》 (有机地球化学)

年 卷 期：1987年第11卷第2期

页      面：115-119页

核心收录：

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

主　　题：13 C deuterium methane Methanobacterium formicicum 

摘      要：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 CO 2 are compared to data observed in natural conditions in marine sediments. This comparison leads to further evidence that CO 2 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 CO 2 reduction. A mechanism is proposed as a possible explanation for the data obtained involving conjugated reactions of CO 2 -reduction and enzymatic reduction of water.