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Updated: May 10, 2025

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors
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Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

Published on: December 6, 2018

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脱化占主导地位,在水表波动下,酸盐减弱和氧化排放占主导地位

Lin Zhang1, Helin Wang2, Xiaohan Liu2

  • 1Key Laboratory of Marine Environment and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; School of Environmental Studies, China University of Geosciences, Wuhan 430078, China; School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom.

Journal of hazardous materials
|April 24, 2025
PubMed
概括

河岸土壤的地下水位波动会影响气损失和温室气体排放. 微生物群落和转化是理解农业地区这些影响的关键.

关键词:
颗粒大小 颗粒大小 颗粒大小氧化还原波动的环境微生物社区的反应反应.土壤质地 土壤质地质地水平面水位波动的波动.

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Overview of Nitrogen Metabolism01:20

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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
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The Nitrogen Cycle

Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
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The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
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1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
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The Equilibrium Constant

Consider the oxidation of sulfur dioxide:
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