Fluorescent tracer for water treatment and using method thereof

A fluorescent tracer and water treatment technology, applied in water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, fluorescence/phosphorescence, etc., can solve tracer limitation and tracer fluorescence stability gender issues

Inactive Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor fluorescent stability of the tracer and the limitation of the use of the tracer by water treatment chemicals, the present invention provides a novel fluorescent tr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] fluorescent tracer

[0024] The fluorescent tracer is a CdSe / ZnS core-shell structure, a water-soluble quantum dot with a particle size of 3.36nm and a non-functional group.

[0025] The water-soluble quantum dots with non-functional groups of CdSe / ZnS core-shell structure are synthesized in the organic phase and then modified with polyethylene glycol to obtain water-soluble quantum dots. The quantum dots are measured by a fluorescence spectrophotometer. The excitation wavelength is between 300nm and 400nm, the maximum emission wavelength is around 580nm, and the half-maximum width is ≤30nm.

[0026] These spectral properties allow the quantum dots to be used as tracers in water treatment processes, and the huge difference between the maximum excitation wavelength and the maximum emission wavelength reduces the interference caused by some organic compounds to its determination.

[0027] How to use the tracer

[0028] After dissolving and diluting the quantum dots, mix...

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Abstract

The invention provides a fluorescent tracer for water treatment and a using method thereof. The tracer is a semiconductor quantum dot with fluorescent performance; after the tracer is mixed with a water treatment agent, the mixture is fed into an industrial water system; and the running level of water treatment facilities is improved by continuously monitoring the concentration of the fluorescent tracer in the water system and controlling the feeding amount of the water treatment agent. The tracer is inert in the water system, and has the characteristics of superior tracing performance, high detection sensitivity, stable performance, broad applicable water quality and the like.

Description

technical field [0001] The invention relates to a tracer, more specifically, to a semiconductor quantum dot fluorescent tracer for water treatment and a use method thereof. Background technique [0002] In industrial water systems, water treatment agents have been widely used, and the concentration control of water treatment agents has always been one of the difficult problems in water treatment management. Usually, the concentration of water treatment agents can be monitored by manual sampling to monitor the total phosphorus value, but this method is time-consuming and the control lags, which is likely to cause waste of water treatment chemicals and scaling and corrosion of the system. In recent years, with the promotion and use of environmentally friendly phosphorus-free water treatment agents, the concentration of water treatment agents will not be able to be monitored and controlled by conventional monitoring methods. In order to better control the concentration of wate...

Claims

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Application Information

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IPC IPC(8): G01N21/64C09K11/56C09K11/88C09K11/89C09K11/74C09K11/70C02F1/50C02F5/00
Inventor 万国晖周建平春霞张英雄周霖
Owner CHINA PETROLEUM & CHEM CORP
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