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Arsenic removal adsorbent and preparation method thereof

A technology of adsorbent and stabilizer, which is applied in the field of arsenic removal adsorbent and its preparation, can solve the problems of difficult regeneration, small adsorption capacity, slow adsorption rate, etc., and achieve the effect of rapid adsorption removal, small particle size and good stability

Inactive Publication Date: 2017-07-14
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to develop an arsenic removal adsorbent with uniform particle size distribution, high specific surface area and pore volume, and easy regeneration, and to provide a simple preparation method for the above-mentioned arsenic removal adsorbent to overcome the existing arsenic removal. The adsorbent has the problems of small adsorption capacity, slow adsorption rate and difficulty in regeneration

Method used

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  • Arsenic removal adsorbent and preparation method thereof
  • Arsenic removal adsorbent and preparation method thereof
  • Arsenic removal adsorbent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] A preparation method for removing arsenic adsorbent, said method comprising the following steps:

[0041] Step 1: preparing a magnesium-aluminum metal salt mixed solution with a molar concentration of 1 mol / L, the molar ratio range of magnesium to aluminum in the magnesium-aluminum metal salt mixed solution is 2:3; the magnesium-aluminum metal salt is magnesium nitrate and aluminum nitrate.

[0042] Step 2: prepare the mixed alkaline solution that sodium hydroxide and sodium carbonate form, the molar concentration of sodium carbonate in the mixed alkaline solution is 2 times of the aluminum salt concentration in the magnesium aluminum metal salt mixed solution, the molar concentration of sodium hydroxide is magnesium aluminum 1.6 times the total concentration of metal ions in the metal salt mixed solution;

[0043] Step 3: drop the magnesium-aluminum metal salt mixed solution and the mixed alkali solution into the deionized water at the same constant drop rate, and keep...

Embodiment 2

[0053] A preparation method for removing arsenic adsorbent, said method comprising the following steps:

[0054] Step 1: prepare a magnesium-aluminum metal salt mixed solution with a molar concentration of 1.2mol / L, the molar ratio range of magnesium to aluminum in the magnesium-aluminum metal salt mixed solution is 5:1; the magnesium-aluminum metal salt is aluminum nitrate and magnesium nitrate .

[0055] Step 2: prepare the mixed alkaline solution that sodium hydroxide and sodium carbonate form, the molar concentration of sodium carbonate in the mixed alkaline solution is 2 times of the aluminum salt concentration in the magnesium aluminum metal salt mixed solution, the molar concentration of sodium hydroxide is magnesium aluminum 1.6 times the total concentration of metal ions in the metal salt mixed solution;

[0056] Step 3: drop the magnesium-aluminum metal salt mixed solution and the mixed alkali solution into the deionized water at the same constant drop rate, and keep ...

Embodiment 3

[0066] A preparation method for removing arsenic adsorbent, said method comprising the following steps:

[0067] Step 1: Prepare a mixed solution of magnesium-aluminum metal salt with a molar concentration of 1.1 mol / L. The molar ratio of magnesium to aluminum in the mixed solution of magnesium-aluminum metal salt is 2:1; the magnesium-aluminum metal salt is aluminum sulfate and magnesium chloride.

[0068] Step 2: prepare the mixed alkaline solution that sodium hydroxide and sodium carbonate form, the molar concentration of sodium carbonate in the mixed alkaline solution is 2 times of the aluminum salt concentration in the magnesium aluminum metal salt mixed solution, the molar concentration of sodium hydroxide is magnesium aluminum 1.6 times the total concentration of metal ions in the metal salt mixed solution;

[0069] Step 3: drop the magnesium-aluminum metal salt mixed solution and the mixed alkali solution into the deionized water at the same constant drop rate, and kee...

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Abstract

The invention relates to a preparation method of an arsenic removal adsorbent and a preparation method thereof. The preparation method sequentially comprises the following steps: preparation of magnesium aluminum hydrotalcite; introduction of hydrogen peroxide to a laminated plate interlayer; a non-homogeneous Fenton reaction; and pickling. The adsorbent is applied to adsorb and remove arsenic from water. The preparation method has the advantages of simplicity and low cost, and the prepared adsorbent has the characteristics of ordered mesoporous pores, uniform particle size, high specific surface area and high pore volume, can be massively applied to high efficiency removal of arsenic from wastewater, and can be easily regenerated.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and in particular relates to an adsorbent for removing arsenic and its preparation method and application. Background technique [0002] Heavy metal pollution, especially arsenic pollution has always been an environmental issue of widespread concern. Arsenic pollution not only seriously harms the environment, but also seriously harms the production, life and personal health and safety of local residents. In 2011, my country's first "Twelfth Five-Year Plan" special plan - "Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution" included arsenic as one of the heavy metals that the plan strives to control. [0003] At present, the treatment methods for arsenic pollution at home and abroad mainly include adsorption method, biological method, ion exchange method, membrane separation method and so on. Compared with other methods, the adsorption method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08C02F1/28B01J20/30C02F101/10
CPCB01J20/0229B01J20/043B01J20/045B01J20/046B01J20/08C02F1/281C02F2101/103
Inventor 王倩石春蕾吴小宁白青青李蓉
Owner XIAN TECH UNIV
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