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Material adsorbing heavy metal in water solution and method

A technology for heavy metal ions and separation materials, which is applied in the fields of adsorbed water/sewage treatment, solid adsorbent liquid separation, separation methods, etc., and can solve the problem of inability to remove or separate heavy metal ions

Active Publication Date: 2013-06-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And in the public report before the present invention, EGTA is only used as the complexing agent of certain metal ion in the solution, does not see any report as the purposes of heavy metal ion removal or separation
And the removal or separation of heavy metal ions in the solution cannot be achieved by using EGTA alone

Method used

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  • Material adsorbing heavy metal in water solution and method
  • Material adsorbing heavy metal in water solution and method
  • Material adsorbing heavy metal in water solution and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068]

[0069] In a 250mL round bottom flask, mix 0.83g NaOH (20.75mmol) and 1.52g cetyltrimethylammonium bromide (CTAB, 4.2mmol) in 80mL water, stir at 80°C for 30min until CTAB is completely dissolved. in the water. Subsequently, 1.24 g of 3-(triethoxysilane) propylamine (5.6 mmol) was added, and after stirring for 2 h at 80° C., 7 mL (3.46 mmol) of ethyl orthosilicate was added dropwise, and the addition was completed in 30 min. After continuing to stir at ℃ for 2 h, stop the reaction, and filter with hot suction to obtain a white filter cake. After the filter cake was dried at 90°C, it was uniformly dispersed in methanol (200 mL) containing 10 mL of hydrochloric acid, stirred at reflux for 24 hours, filtered to obtain a white solid, and dried to obtain amino-functionalized mesoporous silica particles.

[0070]

[0071] Weigh 500 mg of ethylene glycol diethyl ether diamine tetraacetic acid (EGTA, 1.3 mmol) and mix it in 50 mL of deionized water. Then prepare 2M NaO...

Embodiment 2

[0073]

[0074] Magnetic Fe 3 o 4 The particles were dispersed in chloroform, added to 10 mL of an aqueous solution containing 1.5 g of CTAB, and stirred for 30 minutes to obtain an oil-water emulsion, then heated to 60°C and stirred for 10 minutes to volatilize the chloroform. Add the above mixture into 60 mL of water and 0.6 mL of 2M sodium hydroxide solution, stir and heat to 70°C. Then 1 mL (tetraethyl orthosilicate) TEOS was added. After 10 minutes 100 μL of 3-aminopropyltriethoxysilane (APTES) was added and stirring was continued for 3 hours. Centrifuge, wash with ethanol three times, add the particles to a hydrochloric acid ethanol solution with Ph=1.4, stir at 60° C. for 3 hours, centrifuge, wash with ethanol three times, and dry to obtain magnetic mesoporous silica gel nanoparticles with surface amino functionalization.

[0075]

[0076] Weigh 500 mg of ethylene glycol diethyl ether diamine tetraacetic acid (EGTA, 1.3 mmol) and mix it in 50 mL of deionized wa...

Embodiment 3

[0078]

[0079] Weigh 500 mg of ethylene glycol diethyl ether diamine tetraacetic acid (EGTA, 1.3 mmol) and mix it in 50 mL of deionized water. Then prepare 2M NaOH solution, adjust the pH of EGTA aqueous solution to about 5, and stir evenly, and the solution becomes clear. Add 200 mg of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI, 1.0 mmol), and stir for 20 min. Then add 2.0 g of epoxy resin containing primary amino groups on the surface, and stir overnight at room temperature. After stopping the reaction, filter with suction, and wash the resin particles several times with deionized water. The resin particles were taken out and dried at 90° C. to obtain acceptor-modified epoxy resin.

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Abstract

The invention relates to material absorbing heavy metal in water solution and a method. The material is made through the fact that functional perssad is modified on the surface of various kinds of immobilized material, and the functional perssad is in covalent bonding with ethylene glycol tetraacetic acid (EGTA). The material can be used for remove of lead, mercury, cadmium, arsenic and other poisonous metal in the water solution, cannot change an adsorbing effect along with change of the immobilized material, and cannot change other components in the water solution. The material and the method have the advantages of being low in cost, wide in application range, strong in removing performance, good in selectivity, capable of being reproducible, and the like.

Description

technical field [0001] The invention belongs to the field of metal separation. In particular, the present invention relates to a material and method for separating heavy metals in aqueous solutions with a wide pH range. technical background [0002] In modern industry, heavy metal pollution is increasingly harmful to the ecological environment and human health. Heavy metals can strongly interact with proteins and various enzymes in the human body, making them inactive, and may also accumulate in certain organs of the human body. If the human body exceeds the tolerance limit, it will cause acute poisoning, Subacute poisoning, chronic poisoning, etc. will cause great harm to the human body. For example, public hazards such as Minamata disease (mercury pollution) and bone pain disease (cadmium pollution) that occurred in Japan are all caused by heavy metal pollution. [0003] Heavy metals are widely distributed in the atmosphere, water, soil, and organisms. When the environme...

Claims

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Application Information

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IPC IPC(8): B01J20/22C02F1/28C02F1/62B01D15/00
Inventor 朱维平钱旭红任龙徐玉芳
Owner EAST CHINA UNIV OF SCI & TECH
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