Department of Environmental and Chemistry Engineering, Faculty of Civil and Environmental Engineering and Architecture, Rzeszów University of Technology, Rzeszów, Poland.
PLoS One. 2018 Jun 27;13(6):e0199755. doi: 10.1371/journal.pone.0199755. eCollection 2018.
This paper presents the results of research into pathways leading to the production of methane (CH4) and carbon dioxide (CO2) in sediments of two eutrophic reservoirs (Maziarnia and Nielisz), located in south-eastern Poland. In seeking to identify the pathways in question, use was made of analysis of stable carbon isotopes in CH4 and CO2 dissolved in pore water. This determined that CH4 is mainly produced through acetate fermentation, though the hydrogenotrophic methanogenic process may also be of importance, especially in deeper layers of sediments. Both the presence of autochthonous organic matter and increased pH values are shown to favour acetate fermentation. In turn, methanogenesis in sediments is assessed as capable of accounting for the generation of a considerable amount of CO2. Indeed, the role of methanogenesis in CO2 production is increasingly important further down in the layers of sediment, where allochthonous organic matter is predominant.
本文介绍了对位于波兰东南部的两个富营养化水库（马齐亚尔尼和尼尔利什）沉积物中甲烷（CH4）和二氧化碳（CO2）生成途径的研究结果。为了确定所涉及的途径，使用了对溶解在孔隙水中的 CH4 和 CO2 的稳定碳同位素分析。这表明 CH4 主要通过乙酸发酵产生，但氢营养型产甲烷过程也可能很重要，特别是在沉积物的较深层。自生有机物的存在和 pH 值的升高都有利于乙酸发酵。反过来，沉积物中的产甲烷作用被评估为能够产生相当数量的 CO2。事实上，随着异源有机物在沉积物层中占主导地位，产甲烷作用在 CO2 生成中的作用变得越来越重要。
