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Preparation method of modified diatomaceous earth material for absorbing divalent copper ions in water solution

A divalent copper ion and diatomite technology, which is applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of poor stability, weak adsorption capacity, and high preparation cost. Achieve the effects of recyclable and reused adsorption materials, improved adsorption capacity and low cost

Inactive Publication Date: 2012-06-20
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the invention is to overcome existing modified diatomite to Cu 2+ Due to the disadvantages of weak adsorption capacity, poor stability and high preparation cost, a method for preparing a modified diatomite material for absorbing divalent copper ions in aqueous solution is provided.

Method used

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  • Preparation method of modified diatomaceous earth material for absorbing divalent copper ions in water solution
  • Preparation method of modified diatomaceous earth material for absorbing divalent copper ions in water solution
  • Preparation method of modified diatomaceous earth material for absorbing divalent copper ions in water solution

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Effect test

Embodiment 1

[0025] 1) Using Jilin Changbai diatomite as a raw material, weigh 1g of diatomite, put it in a muffle furnace, and calcinate at 800°C for 1 hour.

[0026] 2) Dissolve 4ml of γ-aminopropyltriethoxysilane in 50ml of anhydrous toluene, mix well, add the calcined diatomite obtained in step 1), and fully stir.

[0027] 3) The obtained suspension was placed in an oil bath at 120°C, stirred and refluxed at 400 rpm for 20 hours. The resulting mixture was filtered, and the filtered solid product was subjected to three wash-filtration cycles with anhydrous toluene.

[0028] 4) Drying the solid product obtained in step 3) at 90° C., and then grinding and pulverizing it to obtain a modified diatomite product.

[0029] The modified diatomite was tested by means of elemental analysis, infrared spectrum analysis and thermogravimetric analysis. The results showed that the hydrolyzed γ-aminopropyltriethoxysilane was grafted on the diatomite surface (see attached figure 1 Infrared spectrosco...

Embodiment 2

[0032] 1) Using Jilin Changbai diatomite as raw material, take a 50g sample of diatomite and heat-treat it in an oven at 150°C for 24 hours.

[0033] 2) Add the heat-treated diatomite obtained in step 1) into a mixed solution of 200ml of γ-aminopropyltriethoxysilane and 600ml of anhydrous toluene, and fully stir.

[0034] 3) Stir and reflux the obtained suspension in an oil bath at 120° C. for 10 hours. The resulting mixture was filtered, and the filtered solid product was subjected to 4 wash-filtration cycles with anhydrous toluene.

[0035] 4) Drying the solid product obtained in step 3) at 90° C., and then grinding and pulverizing it to obtain a modified diatomite product.

[0036] The modified diatomite was tested by means of elemental analysis, infrared spectrum analysis and thermogravimetric analysis. The results showed that the hydrolyzed γ-aminopropyltriethoxysilane was grafted on the surface of diatomite; the grafting amount was 0.9mmol / g (according to the elemental...

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Abstract

The invention relates to a preparation method of a modified diatomaceous earth material for absorbing divalent copper ions in water solution, which comprises the following steps of: carrying out heat-processing to a diatomaceous earth raw material; mixing and dissolving amino organic silane and a non-aqueous solvent; adding diatomaceous earth; carrying out reflux reaction; washing-filtering; drying; crushing; and the like. In the invention, the obtained modified diatomaceous earth material can absorb and process Cu2+ in the aqueous solution. The invention has the advantages of efficiency, low cost, stably absorption material, recovery and the like, and can be widely applied for copper-contained waste water processing, trace copper absorption and recovery, and the like.

Description

technical field [0001] The invention relates to a preparation method of a modified diatomite material used for absorbing divalent copper ions in aqueous solution. Background technique [0002] Diatomaceous earth is a mineral resource formed by the accumulation of the remains of diatom organisms (that is, diatom shells) after deposition. Diatoms are a kind of single-celled algae widely distributed in water bodies. The main inorganic component of their shells is amorphous silica, which belongs to amorphous A-type opal (Opal-A) in mineralogy. Due to the excellent properties of diatom shells such as high heat resistance, acid resistance, low bulk density, porous structure and strong adsorption, diatomite is widely used in many industrial fields such as adsorption, filtration, carrier, and building materials. . For diatomite with industrial application value, the silica content in its ore is usually above 75% (Huang Chengyan et al., Science Press, 1993). [0003] Copper is a c...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 袁鹏刘冬刘康康钟远红于文彬何宏平颜文昌
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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