Separate N2O selective microelectrode and preparation method thereof

Abstract

The invention discloses a separate N2O selective microelectrode and a preparation method thereof. The microelectrode comprises a tubular conical glass pipe electrode and an outer tubular conical glass sleeve sleeved on the lower end of the glass pipe electrode. One end of the two is conical, and the other is cylindrical. The outer tubular conical glass sleeve is filled with an ascorbate solution. The conical tip is sealed by using a silica gel film. The inner side of the tubular conical glass pipe electrode is filled with bismuth alloy wrapping a thin copper wire. The cylindrical end face is sealed by using epoxy resin. The thin copper wire stretches from the cylindrical end face and is connected with a micro-voltmeter. The tubular conical glass pipe electrode conical end is sleeved with the outer tubular conical glass sleeve cylindrical end face. The sleeved place is sealed by using epoxy resin. The method comprises the steps that: the tubular conical glass pipe electrode is assembled; the outer tubular conical glass sleeve is assembled; and the separate N2O selective microelectrode is assembled. The microelectrode has small volume, high resolution, high sensitivity, and short response time. The preparation method is simple. With the microelectrode, N2O spatial distribution characteristics inside active sludge group can be rapidly determined.

Description

technical field [0001] The invention belongs to the technical field of environmental microorganisms and environmental monitoring, and mainly relates to a separate N 2 O selection of microelectrodes and their fabrication methods. Background technique [0002] The water environment is closely related to human life. The quality of water not only affects people's health, but may also cause ecological problems. Excessive discharge of nitrogen concentration in the water body will easily induce eutrophication of the water body, causing excessive growth and reproduction of algae, large areas of the water surface will be covered by algae, and algae blooms and red tides will appear. A series of ecological problems have caused lakes and other natural water bodies to swamp or even die out. Therefore, wastewater biological denitrification (converting nitrogen in water into nitrogen gas) treatment is an important way to prevent wastewater eutrophication, and it is also an important rese...

AI Technical Summary

Problems solved by technology

[0005] At present, in the process of biological denitrification of wastewater, N 2 The research on O release mostly stays at the macro level, using traditional research methods and technical means to measure the gas composition by collecting tail gas, and studying N from a macro perspective. 2 O release amount and release characteristics, the microenvironment—especially the activated sludge group (such as granular sludge, biofilm, natural water sediment layer, etc.) internal N 2 The determination of O is powerless

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