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nitrification    
n. 氮化合,氮饱和,硝化作用

氮化合,氮饱和,硝化作用

nitrification
n 1: the chemical process in which a nitro group is added to an
organic compound (or substituted for another group in an
organic compound)
2: the oxidation of ammonium compounds in dead organic material
into nitrates and nitrites by soil bacteria (making nitrogen
available to plants)

Nitrification \Ni`tri*fi*ca"tion\, n. [Cf. F. nitrification. see
{Nitrify}.]
1. (Chem.)
(a) The act, process, or result of combining with nitrogen
or some of its compounds.
(b) The act or process of oxidizing nitrogen or its
compounds so as to form nitrous or nitric acid.
[1913 Webster]

2. A process of oxidation, in which nitrogenous vegetable and
animal matter in the presence of air, moisture, and some
basic substances, as lime or alkali carbonate, is
converted into nitrates.
[1913 Webster]

Note: The process is going on at all times in porous soils
and in water contaminated with nitrogenous matter, and
is supposed to be due to the presence of a bacteria,
such as members of the genus {Azotobacter}, formerly
called nitrification ferments. In former times the
process was extensively made use of in the production
of saltpeter.
[1913 Webster PJC]


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  • Nitrification - Wikipedia
    Nitrification is a process of nitrogen compound oxidation (effectively, loss of electrons from the nitrogen atom to the oxygen atoms), and is catalyzed step-wise by a series of enzymes
  • Nitrification – Definition, Equation, Process, Diagram
    Nitrification is an essential step in the nitrogen cycle of soil, water, and wastewater treatments It involves the biological oxidation of ammonia (NH 3) or ammonium (NH 4+) to nitrite (NO 2–) and then from nitrite (NO 2–) to nitrate (NO 3–)
  • Nitrification - an overview | ScienceDirect Topics
    Nitrification is the biological conversion of reduced nitrogen (N) in the form of ammonia (NH3) or ammonium (NH 4+) or organic N to oxidized N in the form of nitrite (NO 2−) or nitrate (NO 3−)
  • What is Nitrification? Definition, Process Factors Affecting . . .
    Nitrification is one of the crucial steps in the nitrogen cycle that occurs in soil It is an aerobic process that involves two successive oxidation reactions, in which the ammonia first oxidizes into nitrites, and then nitrites get oxidized into nitrates
  • Nitrification - U. S. Environmental Protection Agency
    Excess nitrogen in the form of ammonia in finished water can be the principal cause of nitrification since ammonia serves as the primary substrate in the nitrification process
  • Nitrification | chemistry | Britannica
    In a process called nitrification, or nitrogen fixation, bacteria such as living within nodules on the roots of peas, clover, and other legumes convert diatomic nitrogen gas to ammonia
  • 5. 10E: Nitrification - Biology LibreTexts
    Nitrification is the process by which ammonia (NH₃) or ammonium (NH₄⁺) is converted to nitrite (NO₂⁻) and then nitrate (NO₂⁻) by bacteria
  • Nitrification - an overview | ScienceDirect Topics
    Nitrification is defined as the microbial process in which ammonia is oxidized to nitrate, traditionally occurring in two sequential steps involving ammonia oxidation to nitrite followed by nitrite oxidation to nitrate
  • Understanding Nitrification and Denitrification in Wastewater Treatment
    Nitrification and denitrification are two halves of a single process, and neither achieves nitrogen removal alone Nitrification converts toxic ammonia to nitrate under aerobic conditions; denitrification converts that nitrate to nitrogen gas under anoxic conditions with a suitable carbon source
  • NITRIFICATION Definition Meaning - Merriam-Webster
    The meaning of NITRIFICATION is the oxidation (as by bacteria) of ammonium salts to nitrites and the further oxidation of nitrites to nitrates





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