门多塔湖沉积物中氢代谢与甲烷生成的关联
Association of hydrogen metabolism with methanogenesis in Lake Mendota sediments.
作者信息
Winfrey M R, Nelson D R, Klevickis S C, Zeikus J G
出版信息
Appl Environ Microbiol. 1977 Feb;33(2):312-8. doi: 10.1128/aem.33.2.312-318.1977.
Abstract
Lake Mendota sediments were studied to determine the role of H2 in sediment methanogenesis. H2 was generally not detectable in sediment. The addition of H2 to sediment significantly increased methanogenensis. The amount of methane produced was proportional to the concentration of hydrogen added. H2 addition stimulated the reduction of CO2 to methane, but did not significantly stimulate the conversion of methanol or the methyl position of acetate to methane. Various organic compounds also stimulated sediment methanogenesis. Formate, ethanol, and glucose were shown to serve as electron donors for CO2 reduction to methane. The addition of formate to sediment resulted in H2 evolution. H2 was not deith the phenomenon of interspecies hydrogen transfer. The results indicate that hydrogen is an important intermediate and a rate-limiting factor in sediment methanogenesis.
摘要
对门多塔湖沉积物进行了研究，以确定氢气在沉积物甲烷生成中的作用。沉积物中一般检测不到氢气。向沉积物中添加氢气显著增加了甲烷生成。产生的甲烷量与添加的氢气浓度成正比。添加氢气刺激了二氧化碳还原为甲烷，但并未显著刺激甲醇或乙酸甲酯位置转化为甲烷。各种有机化合物也刺激了沉积物甲烷生成。已证明甲酸盐、乙醇和葡萄糖可作为将二氧化碳还原为甲烷的电子供体。向沉积物中添加甲酸盐会导致氢气释放。氢气并未参与种间氢转移现象。结果表明，氢气是沉积物甲烷生成中的重要中间体和限速因子。
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