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Detection method for heavy metal ions

A kind of technology of heavy metal ion, detection method

Inactive Publication Date: 2019-06-28
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a detection method for heavy metal ions, which can solve the problem of signal offset and suppression caused by the matrix of wastewater, so as to improve the accuracy of qualitative and quantitative detection results

Method used

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  • Detection method for heavy metal ions

Examples

Experimental program
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Effect test

experiment example 1

[0048] Wastewater is provided with a pH of approximately 6 and a conductivity of approximately 2,000 microSiemens / cm. Next, 2 ppm of copper ions were added to the wastewater. After that, make the waste water flow through the ion rubbing polymer tube with the copper ion rubbing polymer to adsorb the copper ion.

[0049] The detailed preparation method of copper ion rubbing polymer is as follows, 4 mmole of 4-vinylpyridine (4-vinylpyridine) (as a functional group monomer) and 0.5 mmole of copper nitrate (Cu(NO 3 ) 2 ) (as a template ion) was added to 35ml of acetonitrile and stirred overnight. Get 20mmole of ethylene glycol dimethacrylate (EGDMA) (as cross-linking agent) and add in the solution, the solution is passed into N 2 remove O from the solution 2 , the solution was placed in an oil bath at 65° C., and 100 mg of azobisisobutyronitrile (AIBN) (as an initiator) was added to the solution and stirred for 24 hours. After the reaction is completed, the produced powder is ...

experiment example 2

[0061] Wastewater is provided with a pH of approximately 6 and a conductivity of approximately 2,000 microSiemens / cm. Next, 2 ppm of lead ions were added to the wastewater. After that, make the waste water flow through the ion rubbing polymer tube with the lead ion rubbing polymer to adsorb the lead ion.

[0062] The detailed preparation method of lead ion rubbing polymer is as follows, 0.89g of 1-vinylimidazole (1-vinylimidazole) and 0.0828g of lead nitrate Pb(NO 3 ) 2 Add 5 ml of tetrahydrofuran (Tetrahydrofuran, THF) and stir for 30 minutes. Then take 0.13g of 3-(trimethoxysilyl)propylmethacrylate (3-(trimethoxysilyl)propylmethacrylate, TMSPMA) and 2ml of tetrahydrofuran and add it to the solution, and the solution is introduced into the N 2 remove O from the solution 2 , put the solution in an oil bath at 68°C, then add 1.6 mg of AIBN to the solution and stir for 16 hours. After the reaction is completed, the resulting powder is washed several times with 2M nitric aci...

experiment example 3

[0073] Copper ion rubbing polymer (manufacturing method is the same as in Experimental Example 1) and lead ion rubbing polymer (manufacturing method is the same as Experimental Example 2) are mixed with silica sand (trade name: Aldrich 806765, particle size is 3 μm, purchased from SigmaAldrich) . Then fill in the ion-tapping polymer tube. Next, simulated wastewater with a conductivity of approximately 2,400 microSiemens / cm was provided, and 10 ppm of copper ions and 10 ppm of lead ions were added to the simulated wastewater.

[0074] Afterwards, the simulated waste water is made to flow through the ion rubbing polymer tube having the copper ion rubbing polymer and the lead ion rubbing polymer, so as to adsorb the copper ion and the lead ion. Next, rinse the ion-tapping polymer tube with deionized water to remove the matrix. Then, use hydrochloric acid with a pH value of about 2 to desorb copper ions and lead ions. Finally, the screen-printed three-electrode electrode plate ...

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Abstract

Provided is a detection method for heavy metal ions that includes the following steps. Waste water is flowed through an ion-imprinted polymer tube for adsorbing at least two kinds of target heavy metal ions. The ion-imprinted polymer tube is rinsed to remove a non-target object from the ion-imprinted polymer tube. The target heavy metal ions in the ion-imprinted polymer tube are desorbed by usingan acid liquid. An electrochemical method is performed to detect concentrations of the target heavy metal ions.

Description

technical field [0001] The invention relates to a method for detecting heavy metal ions, and in particular to a method for detecting heavy metal ions in wastewater. Background technique [0002] In recent years, due to the rapid development of industries such as electroplating, optoelectronics, printed circuit boards and semiconductor industries, the problem of heavy metal wastewater pollution has become increasingly serious. Heavy metal wastewater will not only cause serious harm to the human body, but also destroy the living environment of human beings. Therefore, the detection method of heavy metal ions in wastewater has become very important. However, there is a matrix in the untreated wastewater, which will interfere and cause the detected signal to shift and suppress, reducing the accuracy of qualitative and quantitative detection results. Therefore, the wastewater must be treated before testing. [0003] Generally speaking, the influence of the matrix will be reduce...

Claims

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Application Information

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IPC IPC(8): G01N27/48
CPCG01N1/4005G01N1/405G01N27/48G01N33/1813G01N2001/4011G01N27/42G01N30/00
Inventor 李俊锜徐树刚吴旻珊王儀婷张婷婷张冠甫
Owner IND TECH RES INST
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