Method for researching dye in solid-liquid interface adsorption kinetics by means of optical fiber evanescent field sensor

A technology of adsorption kinetics and evanescent field, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of large static detection error and difficult solid-liquid separation, and achieve the effects of overcoming errors, high cost performance, and high detection sensitivity

Inactive Publication Date: 2018-05-25
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0010] Another purpose of the present invention is to solve the technical problems of the traditional method for studying the adsorption kinetics of the solid-liquid interface, such as the difficulty of solid-liquid separation when the particle size of the adsorbent material is small, and the large static detection error.

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  • Method for researching dye in solid-liquid interface adsorption kinetics by means of optical fiber evanescent field sensor
  • Method for researching dye in solid-liquid interface adsorption kinetics by means of optical fiber evanescent field sensor
  • Method for researching dye in solid-liquid interface adsorption kinetics by means of optical fiber evanescent field sensor

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Embodiment Construction

[0035] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0036] 1. The assembly method of the optical fiber evanescent field sensor is as follows:

[0037] (1) Preparation of optical fiber

[0038] Cut a certain length of optical fiber with a ceramic sheet (i.d.=700um, Nanjing Chunhui Co., Ltd.), soak the part of the optical fiber that needs to remove the outer cladding material in acetone solution for 10-20 minutes, take out the optical fiber and use external force to remove the cladding on the surface of the optical fiber materials; then soak the exposed fiber core in 1mol / L sodium hydroxide solution for about 10 minutes, take out the fiber and clean it with water and dry it with high-grade lens cleaning paper; then app...

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Abstract

The invention discloses a method for researching dye in solid-liquid interface adsorption kinetics by means of an optical fiber evanescent field sensor. The invention comprises the steps that 1, the optical fiber evanescent field sensor is assembled; 2, a light source with the particular wavelength is selected according to the spectral property of the dye; 3, a second peristaltic pump is switchedon, a dye solution is pumped into a runner, change of an evanescent field is detected in real time through a photo-multiplier tube, and a value, changing with time, of a signal value detected by a photo-multiplier tube detector is recorded; 4, the second peristaltic pump is switched off, a first peristaltic pump is switched on, and eluent is pumped into the runner to elute the dye adsorbed on thesurface of a thin film; 5, a curve, changing with time, of the signal value detected by the photo-multiplier tube is made, and the dye adsorption kinetics is analyzed and researched. The optical fibersensor is high in sensitivity, it can be detected that dye molecules are adsorbed to the solid-liquid interface, and then the evanescent field changes slightly, and the optical fiber sensor is applicable to the solid-liquid interface adsorption kinetics.

Description

technical field [0001] The invention belongs to the field of optical sensor devices, in particular to a method for studying the adsorption kinetics of dyes on a solid-liquid interface by using an optical fiber evanescent field sensor. Background technique [0002] Adsorption at the solid-liquid interface is ubiquitous in nature and is the most important phenomenon. Therefore, interface adsorption has become one of the important research contents in the field of environmental chemistry. The adsorption behavior of pollutants at the solid-liquid interface (such as the soil-water interface) has an important impact on the speciation distribution, migration, transformation and fate of pollutants. In addition, the technologies used in environmental governance projects are mostly related to the adsorption process. Therefore, a scientific understanding of the adsorption behavior of pollutants is an important basis for studying the mechanism of adsorption to treat pollutants and expl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 熊艳陈杰段明方申文谭军
Owner SOUTHWEST PETROLEUM UNIV
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