沿海海洋沉积物中一氧化氮和一氧化二氮的存在情况。
Occurrence of nitric and nitrous oxides in a coastal marine sediment.
作者信息
Sørensen J
出版信息
Appl Environ Microbiol. 1978 Dec;36(6):809-13. doi: 10.1128/aem.36.6.809-813.1978.
Abstract
The distribution of denitrification activity in a coastal marine sediment was determined by the acetylene inhibition technique and compared to concentration profiles of NO3-, NO2-, NO, and N2O. The bulk of the denitrification activity was associated with the accumulation of NO3- in the oxidized surface zone of the sediment, but a secondary denitrification zone was occasionally found in the deeper layers where oxidized patches had been introduced by the burrowing activity of the macrofauna. Maxima of NO and N2O were not associated with the peak activity of denitrification in the surface zone but were located at the lower edge of the activity profile. Significant accumulation of NO was found at the redox transition zone towards the deeper, sulfide-rich layers.
摘要
利用乙炔抑制技术测定了沿海海洋沉积物中反硝化活性的分布，并与硝酸根、亚硝酸根、一氧化氮和一氧化二氮的浓度剖面进行了比较。大部分反硝化活性与沉积物氧化表层中硝酸根的积累有关，但在较深层偶尔会发现一个次生反硝化区，在那里大型底栖动物的穴居活动引入了氧化斑块。一氧化氮和一氧化二氮的最大值与表层反硝化的峰值活性无关，而是位于活性剖面的下边缘。在向更深的富含硫化物层的氧化还原过渡区发现了一氧化氮的显著积累。
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