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Method for online monitoring of pollutants in water

A technology for pollutants and polymers, applied in the detection field, can solve problems such as application limitations, difficulty in detecting Raman signals, and weak signals, and achieve the effects of simple detection methods, enhanced adsorption and enrichment capabilities, and easy operation

Inactive Publication Date: 2016-05-04
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0003] As a molecular vibrational spectroscopy technique, Raman spectroscopy can identify different substances at the molecular level, and has many advantages in pollutant detection (such as no labeling, no complicated sample pretreatment, accurate provision of molecular chemical information, short detection cycle and water Small interference, etc.), but conventional Raman spectroscopy is difficult to detect Raman signals of many substances due to weak signals, which greatly limits its application

Method used

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  • Method for online monitoring of pollutants in water
  • Method for online monitoring of pollutants in water
  • Method for online monitoring of pollutants in water

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 1) First take 15ml of freshly prepared gold nanoparticle solution in a 25mL beaker and put it into the rotor;

[0024] 2) Then add 3ml of toluene and cyclohexanone mixed solution containing 5% polystyrene to the gold nanoparticle solution to form an oil-water interface;

[0025] 3) Gently stir the nano-gold particle solution through the rotor, so that the nano-gold particles float to the oil-water interface and self-assemble into an assembly;

[0026] 4) After the organic solvent in the upper layer is volatilized, the polystyrene film containing the nanoassembly is taken out, and finally a light and flexible surface-enhanced Raman substrate is obtained.

Embodiment 2

[0028] 1) The prepared 40ml methyl parathion solution is placed in a 50ml beaker to simulate the water body polluted by pesticides;

[0029] 2) The surface-enhanced Raman substrate prepared in Example 1 was then immersed in a 1 mM mercaptolated β-cyclodextrin solution for 5 hours, and then the substrate was washed with deionized water;

[0030] 3) sticking the side of the cleaned surface-enhanced Raman substrate containing the nanoparticle assembly on the water surface;

[0031] 3) Use a portable Raman spectrometer to perform Raman spectrum scanning on the surface-enhanced Raman substrate attached to the water surface at different time periods;

[0032] 4) Finally, the detected Raman signal is used to determine the status of pollutants in the water.

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Abstract

The invention relates to a method for online monitoring of pollutants in water. The method is characterized by comprising the following steps: attaching a lightweight and flexible surface-enhanced Raman substrate onto a water surface, absorbing the pollutants enriched in the water through the floating of the substrate on the water surface and then detecting Raman signals of the pollutants on the surface of the substrate in combination with a surface enhanced Raman technology, thereby reflecting the situation of the pollutants in the water, finally realizing the long-term online monitoring of the pollutants in the water and ensuring the water quality safety. Compared with other detection methods, the method is simple and quick and low in cost, can perform long-term online monitoring on the water quality safety and is very wide in application prospect in the environmental monitoring field.

Description

technical field [0001] The invention relates to a detection method, in particular to a method for online monitoring of pollutants in water. Background technique [0002] Water is the source of life and one of the indispensable and important material resources for the survival and development of human beings. However, with the rapid development of society, a large amount of industrial, agricultural and domestic wastes are discharged into the water, which seriously pollutes water resources and poses a major threat to human survival. According to a survey by the world's authoritative organization, in developing countries, 8% of various diseases are spread by drinking unsanitary water, and drinking unsanitary water causes at least 20 million deaths worldwide every year. Therefore, water pollution has been Known as "the world's number one killer". Faced with such a situation, it is particularly important to improve the monitoring of water pollution. The monitoring method is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 钟鹭斌郑煜铭牛琦峰
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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