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Foam mercury trap material and application thereof

A foam material and foam technology, applied in the field of foam mercury trapping materials, can solve the problems of complex preparation process, weak material coating, short service life, etc., and achieve the effect of simple preparation process, low cost and long service life

Active Publication Date: 2014-09-24
BEIJING JITIAN INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used precious metal-containing mercury trapping materials are generally prepared by reacting quartz sand or alumina pellets with precious metal salts, but the preparation process is relatively complicated, and the reaction needs to be carried out at high temperature, and the coating of the prepared material is not firm, and the service life is long. shorter

Method used

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  • Foam mercury trap material and application thereof
  • Foam mercury trap material and application thereof
  • Foam mercury trap material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1g of chloroauric acid and put it in a 500mL beaker, add deionized water to make 0.01mol / L chloroauric acid aqueous solution. Get 5g nickel foam and soak it with acetone for 15 minutes, wash it with deionized water, put it in a 500mL beaker after drying, add the above-mentioned aqueous chloroauric acid solution prepared above, the quality of foam nickel and the aqueous chloroauric acid ratio are 1g: 20mL, The two carry out a chemical reaction, gold is deposited on the surface of nickel foam, and the reacted foam nickel is taken out and washed with deionized water, and dried to obtain a gold-loaded foam nickel mercury trapping material, and 0.5g of the obtained material is put into the mercury trapping tube in spare.

[0023] Process such as figure 1 , take 100mg soil sample and put it into the sampling boat 3, send it into the combustion furnace 4 by the sampling mechanism 2 (for sending the sampling boat into the combustion furnace), and in the combustion furnace...

Embodiment 2

[0028] The heating method of the mercury-catching material adopts a self-heating method, and the rest of the process is the same as in Example 1. After the mercury-catching material captures mercury, a voltage is applied to the mercury-catching tube 7 with a low-voltage direct current power supply 8, and the mercury-catching material itself generates heat to complete the release of mercury, and finally Detected by an atomic fluorescence photometer 9, the process is as follows figure 2 .

[0029] The mercury release spectrum obtained in the experiment is as follows Figure 4 As shown, it is quantified by the integral area, and the specific test indicators are shown in Table 2:

[0030] Table 2 Mercury release test index of gold-loaded nickel foam mercury capture material (mercury capture material self-heating)

[0031]

Embodiment 3

[0033] Take 1g of silver nitrate and place it in a 500mL beaker, add deionized water to make a 0.1mol / L silver nitrate aqueous solution. Take 5g of foamed tungsten soaked in acetone for 15 minutes, wash it with deionized water, put it in a 500mL beaker after drying, add the silver nitrate aqueous solution prepared above, the ratio of foamed tungsten to silver nitrate aqueous solution is 1g: 40mL, the two Carry out a chemical reaction, silver is deposited on the surface of foamed tungsten, and the reacted foamed tungsten is taken out and washed with deionized water, and after drying, a silver-loaded foamed tungsten mercury trapping material is obtained, and 0.5g of the obtained material is put into a mercury trapping tube for later use .

[0034] Concrete application in measuring mercury is the same as embodiment 1, and test index is as table 3:

[0035] Table 3 Mercury release test index of loaded silver foam tungsten mercury capture material (resistance wire heating)

[003...

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Abstract

The invention relates to a foam mercury trap material, which is prepared by directly performing chemical reaction on a foam material matrix (nickel, tungsten and the like) and salt (chloroauric acid, chloroplatinic acid and the like) of noble metal and depositing the noble metal on the surface of the foam material. The noble metal can form amalgam alloy with element mercury at normal temperature to trap mercury; and when heated to 600 DEG C, the amalgam alloy is damaged to release the mercury. The prepared noble metal-carried foam mercury trap material is used for eliminating interference of a sample matrix during measurement of the mercury. The foam mercury trap material has a simple preparation process and is low in cost; the resulting material is full in trap of the mercury at the normal temperature; the mercury is completely released during heating; the surface noble metal is firmly combined with the foam material; and the service life is long.

Description

technical field [0001] The invention relates to a chemical material, in particular to a foam mercury trapping material. Background technique [0002] Mercury is extremely harmful to humans, mainly affecting the central nervous system, digestive system and kidneys. In addition, it also has certain effects on the respiratory system, skin, blood and eyes, and the human body cannot excrete the accumulated mercury in the body through its own metabolism. Accumulation in the body will lead to various diseases. In the process of industrialization, the amount of mercury discharged into the environment is increasing year by year. Due to its cumulative effect in the food chain, mercury poisoning incidents in related areas of the world often occur, so the determination and monitoring of mercury is particularly important. [0003] Precious metals can form amalgam alloys with elemental mercury at room temperature to capture mercury. When the amalgam alloy is destroyed at a high temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/64G01N21/64
Inventor 周齐冯礼刘霁欣叶建平郑逢喜李俊伟
Owner BEIJING JITIAN INSTR CO LTD
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