Method for depositing mercury in water body and application thereof

A mercury deposition, water body technology, applied in the field of water treatment, to achieve the effect of accurate concentration

Inactive Publication Date: 2019-03-29
THERMO FISHER SCI SHANGHAI INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention uses mercury-specific nucleotide probes to self-assemble on the surface of the reaction end to construct a stereoreactive domain that can specifically capture mercury ions, this test method requires the preparation of electrochemical sensors by itself, rather than using the existing technology. equipment and instruments

Method used

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  • Method for depositing mercury in water body and application thereof
  • Method for depositing mercury in water body and application thereof
  • Method for depositing mercury in water body and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0100] Take mercury standard solution (concentration of mercury ion standard solution is 1000ppm) and configure mercury ion concentration as 20ppb, 50ppb, 100ppb water body 6000ml, add CuCl 2 Make Cu 2+ The concentration is 500ppb, and the pH of the system is brought to 4.3 by using HAc / NaAc buffer solution. Immerse the Pt anode and graphite cathode in the water body, apply a 64V DC voltage, and start the electrochemical reaction, and mercury is deposited on the graphite cathode in the form of copper amalgam. After 1.5 hours, the electrochemical reaction was terminated, and the graphite cathode was taken out. A thick copper amalgam layer ( figure 1 (b) shows the Cu-Hg alloy layer deposited on the cathode in Example 3). Niton XL3t is used to carry out X-ray fluorescence spectrum measurement on graphite cathode, and the measurement results are as follows.

[0101] Example serial number

Embodiment 4-6

[0106] Take mercury standard solution (concentration of mercury ion standard solution is 1000ppm) and configure mercury ion concentration to be 20ppb, 50ppb, 100ppb water body 6000ml, add PbCl 2 making Pb 2+ The concentration is 500ppb, and the pH of the system is brought to 4.3 by using HAc / NaAc buffer solution. Immerse the Pt anode and the silicon cathode in the water body, apply a 64V DC voltage to start the electrochemical reaction, and mercury is deposited on the silicon cathode in the form of lead amalgam. After 1.5 hours, the electrochemical reaction was terminated, and the silicon cathode was taken out. Niton XL3t was used to perform X-ray fluorescence spectrometry on the silicon cathode, and the measurement results are as follows.

[0107] Example serial number

Embodiment 7

[0109] Get mercury standard solution (concentration of mercury ion standard solution is 1000ppm) configuration mercury ion concentration is the water body 6000ml of 50ppb, add ZnSO 4 making Zn 2+ The concentration is 500ppb, and the pH of the system is brought to 4.3 by using HAc / NaAc buffer solution. Immerse the Pt anode and the silicon cathode in the water body, apply a 64V DC voltage to start the electrochemical reaction, and mercury is deposited on the silicon cathode in the form of zinc amalgam. After 1.5 hours, the electrochemical reaction was terminated, and the silicon cathode was taken out. X-ray fluorescence spectroscopy of the silicon cathode was performed on a Niton XL3t, giving a reading of 1285 ppm.

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PUM

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Abstract

The invention relates to a method for depositing mercury in a water body and an application thereof. The method for depositing mercury in the water body includes the following steps: adding salts containing metals capable of forming alloys with mercury into the water body; and depositing mercury on a cathode in the water body in a form of mercury alloys by an electrochemical reaction. According tothe method for depositing mercury in the water body can effectively deposit mercury in the form of mercury alloys.

Description

technical field [0001] The invention belongs to the field of water treatment. In particular, the present invention relates to a method for depositing mercury in a body of water and its application. Background technique [0002] Mercury and its compounds are very harmful to the environment and human health. Mercury exists in various forms (inorganic, organic or their mixtures) in the environment, and enters the human body through long-term exposure or bioaccumulation through the food chain, which can harm the human brain, central nervous system, immune system, kidneys and other organs, causing Various acute and chronic diseases. Therefore, efficient and sensitive detection and analysis of mercury concentrations in food, water bodies, and environments closely related to human life can not only meet people's requirements for healthy environmental life, but also understand the characteristics of mercury pollution in the environment, which is convenient for the control and moni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/42
CPCG01N27/42
Inventor 李冬松
Owner THERMO FISHER SCI SHANGHAI INSTR CO LTD
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