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Adsorbent for efficiently adsorbing sulfate ions in water, and preparation method thereof

A sulfate ion and adsorbent technology, which is applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problem of low sulfate ion removal efficiency, achieve high sulfate removal efficiency, and optimize the removal efficiency. The effect of removal efficiency and excellent adsorption capacity

Active Publication Date: 2019-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is to provide a new adsorbent for adsorbing sulfate ions in water in order to overcome the problem that the removal efficiency of sulfate ions in industrial waste water is not high in the prior art.

Method used

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  • Adsorbent for efficiently adsorbing sulfate ions in water, and preparation method thereof
  • Adsorbent for efficiently adsorbing sulfate ions in water, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037]Dissolve calcium nitrate, manganese nitrate and ferric nitrate in deionized water at a molar ratio of 4.5:1.5:2, stir at room temperature until clear, and record it as solution A; dissolve sodium hydroxide in deionized water, stir at room temperature until clear , recorded as solution B; quickly drop solution B into solution A, stop when the pH value of the solution reaches 8.0, continue to stir for 2 hours, pour the solution into a crystallization kettle and treat it with hydrothermal treatment at 105°C for 5 hours, filter, wash, and dry at 100 ℃ dry 10h. The adsorbent product A was obtained by roasting the dried powder at 450°C for 3 hours in a nitrogen atmosphere.

[0038] Add 10 g of adsorbent A to 1 L of aqueous solution containing 500 mg of sulfate ions at 20°C, stir for 20 min, and then detect the content of sulfate ions in the water. The results are listed in Table 1.

Embodiment 2

[0040] Dissolve calcium nitrate, manganese nitrate and ferric nitrate in deionized water at a molar ratio of 3:3:2, stir at room temperature until clear, and record it as solution A; dissolve sodium hydroxide in deionized water, stir at room temperature until clear , recorded as solution B; quickly drop solution B into solution A, stop when the pH value of the solution reaches 8.0, continue to stir for 2 hours, pour the solution into a crystallization kettle and treat it with hydrothermal treatment at 105°C for 5 hours, filter, wash, and dry at 100 ℃ dry 10h. The dried powder was calcined at 450°C for 3 hours in a nitrogen atmosphere to obtain the adsorbent product B.

[0041] Add 10 g of adsorbent B to 1 L of aqueous solution containing 500 mg of sulfate ions at 20°C, stir for 20 min, and then detect the sulfate ion content in the water. The results are listed in Table 1.

Embodiment 3

[0043] Dissolve calcium nitrate, manganese nitrate and ferric nitrate in deionized water at a molar ratio of 5:1:2, stir at room temperature until clear, and record it as solution A; dissolve sodium hydroxide in deionized water, stir at room temperature until clear , recorded as solution B; quickly drop solution B into solution A, stop when the pH value of the solution reaches 8.0, continue to stir for 2 hours, pour the solution into a crystallization kettle and treat it with hydrothermal treatment at 105°C for 5 hours, filter, wash, and dry at 100 ℃ dry 10h. The adsorbent product C was obtained by roasting the dried powder at 450°C for 3 hours in a nitrogen atmosphere.

[0044] Add 10 g of adsorbent C to 1 L of aqueous solution containing 500 mg of sulfate ions at 20°C, stir for 20 minutes, and then detect the content of sulfate ions in the water. The results are listed in Table 1.

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Abstract

The invention relates to an adsorbent for efficiently adsorbing sulfate ions in water, and a preparation method thereof. In the prior art, the removal efficiency of the sulfate ions in the industrialwastewater is not high. A purpose of the present invention is mainly to solve the problem in the prior art. According to the technical scheme, a hydrotalcite-like structure CaxMn6-xFe2(OH)18.4H2O as an adsorbent is prepared by combining co-precipitation and hydrothermal treatment, and x is 3-5.5. With the technical scheme, the problem in the prior art is well solved. According to the present invention, the adsorbent prepared by the method can efficiently remove sulfate ions from water, and can be used in the field of environmental protection.

Description

technical field [0001] The invention relates to an adsorbent for efficiently adsorbing sulfate ions in water and a preparation method thereof. Background technique [0002] Sulfate ion (SO 4 2- ) is a common anion in the inorganic chemical industry, industrial wastewater, mine wastewater, surface water and drinking water. Its large amount of existence has caused adverse effects on chemical production, the environment and human health. SO removal 4 2- There are many methods, such as barium chloride method, barium carbonate method, calcium method, freezing method, filtration method, SRS membrane separation technology, etc., but these methods all have shortcomings of one kind or another. The adsorption method has the characteristics of simple operation, excellent adsorption effect, low cost, no or less environmental pollution, and the content of sulfate in water treated by some adsorbents can reach the standard of drinking water in China, which is conducive to solving the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/10
CPCB01J20/06C02F1/281C02F2101/101Y02W10/37
Inventor 李旭光孔德金邹薇陈燕
Owner CHINA PETROLEUM & CHEM CORP
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