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氧化氮是由氮的各种氧化物所组成的气体混合物的总称。它包括一氧化二氮、一氧化氮、二氧化氮、三氧化二氮、四氧化二氮和五氧化二氮等6种形式。空气中常见的是化学性质相对稳定的一氧化氮和二氧化氮,所以氧化氮的污染实际上是以一氧化氮和二氧化氮为主的污染。在无污染的空气中氧化氮(以二氧化氮计)的浓度大约为0.001ppm,而一般大城市空气中氧化氮的浓度为0.1ppm。 氧化氮的自然来源主要包括:微生物分解含氮化合物、雷
Nitrogen oxide is a collective term for a gas mixture of various oxides of nitrogen. It includes six forms of nitrous oxide, nitric oxide, nitrogen dioxide, nitrogen trioxide, nitrogen tetraoxide and nitrogen pentoxide. Common in the air is the relatively stable chemical properties of nitrogen monoxide and nitrogen dioxide, nitrogen oxide pollution is actually nitrogen monoxide and nitrogen dioxide-based pollution. The concentration of nitrogen oxide (in terms of nitrogen dioxide) in non-polluting air is about 0.001 ppm, while the concentration of nitric oxide in the air of a typical metropolitan city is 0.1 ppm. Natural sources of nitrogen oxides include: microbial decomposition of nitrogen compounds, Lei