Heavy metal removal material and method for removing heavy metals in Chinese herbal medicine extract
A technology for extracting Chinese herbal medicines and heavy metals, which is applied in the field of heavy metal removal materials and heavy metal removal in Chinese herbal medicine extracts, can solve the problems of limited sample processing capacity, increased drug prices, high costs, etc., and achieves low cost, reduced production costs, and improved performance. Effect
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Embodiment 1
[0047] Such as figure 1 Shown, a kind of preparation method of heavy metal removal material, the steps are as follows:
[0048] (1) Choose sodium glass particles with a particle size of 100 microns as the raw material, first place them in a mixed solution of ammonia, hydrogen peroxide and water at 75°C (volume ratio = 1:1:5) for cleaning and surface activation, and then put It is placed in an ethanol solution of 4-aminobutyltriethoxysilane, and reacted with shaking at room temperature for 24 hours, so that 4-aminobutyltriethoxysilane is immobilized on the surface of the particles, and 1 part of amino groups is carried on the surface of the particles.
[0049] (2) Then, the particles treated in step (1) are subjected to second-level and third-level modification. Wherein the second stage modification condition is: mix the treated particles with methyl methacrylate at room temperature, and make the surface of the particles bear 2 parts of ester groups through Michael addition re...
Embodiment 2
[0054] A preparation method for heavy metal removal material, the steps are the same as in Example 1, except that the sodium glass particles with a particle diameter of 100 microns in step (1) are replaced with potassium glass particles with a particle diameter of 200 microns; In step (2), the last step is added to convert the terminal amino group into terminal hydroxyl group through a catalyst. In step (3), EDTA is replaced by dithizone, no condensation reaction is required, and dithizone will spontaneously adsorb on the hydroxyl-rich particle surface ( image 3 ).
[0055] The heavy metal removal material prepared by the above method can be used to remove lead ions (Pb 2 + ). The method is the same as in Example 1.
[0056] After determination, the concentration of lead ions in the filtrate is less than 62ng / l. This method can process tons of Chinese herbal medicine extracts in one hour. After the glass particles are recovered, they can be soaked in 0.1mol / l HCl to elu...
Embodiment 3
[0058] A preparation method for heavy metal removal material, the steps are the same as in Example 1, except that the soda glass particles with a particle diameter of 100 microns in step (1) are replaced by polystyrene with hydroxyl groups on the surface with a particle diameter of 200 microns. Styrene particles, without ammonia and hydrogen peroxide cleaning, the principle of surface hydroxylation of polystyrene particles see Figure 4 ; In step (3), replace EDTA with ITCBE ( Figure 5 ).
[0059] The heavy metal removal material prepared by the above method can be used to remove mercury ions (Hg 2 + ). The method is the same as in Example 1.
[0060] It was determined that the concentration of mercury ions in the filtrate was less than 2 μg / l. This method can process tons of Chinese herbal medicine extracts in one hour.
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Abstract
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