Hydrotalcite, preparation method thereof, and application of hydrotalcite in adsorption of PFOS pollutants in water

A technology of hydrotalcite and pollutants, which is applied in the direction of water pollutants, adsorption water/sewage treatment, water/sewage treatment, etc., and can solve the problems of expensive ion exchange resin materials and poor efficiency

Active Publication Date: 2019-11-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, among the existing adsorbents, activated carbon is cheap but not efficient, ion-exchange resins are efficient but e

Method used

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  • Hydrotalcite, preparation method thereof, and application of hydrotalcite in adsorption of PFOS pollutants in water
  • Hydrotalcite, preparation method thereof, and application of hydrotalcite in adsorption of PFOS pollutants in water
  • Hydrotalcite, preparation method thereof, and application of hydrotalcite in adsorption of PFOS pollutants in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of hydrotalcite of the present invention comprises the following steps:

[0038] 1) Take the raw material aluminum nitrate nonahydrate Al(NO 3 ) 3 9H 2 O and magnesium nitrate hexahydrate Mg(NO 3 ) 2 ·6H 2 O and deionized water;

[0039] Among them, the molecular weight of aluminum nitrate nonahydrate is 375.13, and the molecular weight of magnesium nitrate hexahydrate is 256.41;

[0040] 2) Mix aluminum nitrate nonahydrate and magnesium nitrate hexahydrate in 50 ml of deionized water at a molar ratio of 1:2, and add appropriate amount of ammonia water NH under magnetic stirring 3 ·H 2 O makes the mixed solution evenly mix at pH 11;

[0041] 3) After continuous mixing for 30 minutes, the mixture was transferred into a high-pressure steam pot (Teflon-lined stainless steel autoclave), maintained at a temperature of 200°C for 20 hours, and then naturally cooled to room temperature to obtain a wet white powder solid;

[0042] 4) The white pow...

Embodiment 2

[0046] The steps are the same as in Example 1, except that the molar ratio of aluminum nitrate nonahydrate and magnesium nitrate hexahydrate in Example 1 is changed to 1:3 for mixing. Then the dry white powder-hydrotalcite whose characterization data is as follows Figure 4 shown.

Embodiment 3

[0048] The steps are the same as in Example 1, except that the molar ratio of aluminum nitrate nonahydrate and magnesium nitrate hexahydrate in Example 1 is changed to a ratio of 1:1 and the dry white powder-hydrotalcite is obtained. The characterization data are as follows: Figure 4 shown.

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Abstract

The invention provides a hydrotalcite, a preparation method thereof, and an application of the hydrotalcite in the adsorption of PFOS pollutants in water. The chemical formula of the hydrotalcite is [Mg0.66Al0.34(OH)2](NO3)0.26(CO3)0.04. The preparation method comprises the following steps: 1, adding aluminum nitrate nonahydrate and magnesium nitrate hexahydrate into water according to a molar ratio of 1:2, adding ammonia water while stirring to adjust the pH value to 10-12, and uniformly stirring to obtain a mixed solution; 2, performing a hydrothermal reaction on the mixed solution at 200-230 DEG C for 20 h to obtain a reaction product; and 3, washing and drying the reaction product to obtain the hydrotalcite. The hydrotalcite has the three excellent characteristics of rapid adsorption,high adsorption capacity and non-affection by the pH value of the water when used to adsorb environmental persistent pollutant-PFOS.

Description

technical field [0001] The invention relates to an adsorbent, specifically a hydrotalcite, a preparation method thereof and an application of the hydrotalcite in adsorbing PFOS pollutants in water bodies. Background technique [0002] The chemical stability of perfluorooctane sulfonates (PFOS) and its wide production and use have caused serious environmental accumulation and pollution. pollutants. Not only that, the pollution of the ecological environment and the potential harm of PFOS to human health have become a research hotspot in environmental science and toxicology, especially the impact on the ecological environment has attracted the attention of the international community. For the pollutants of PFOS, although a few removal methods have been realized, the efficiency is not high. [0003] The currently known removal method is to use adsorption technology to remove PFOS. The adsorbents used include powdered activated carbon (adsorption capacity 374-550 mg / g), granula...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30C02F1/28C02F101/36
CPCB01J20/043C02F1/281C02F2101/40
Inventor 张博翔李朝辉江威德王文东
Owner XI AN JIAOTONG UNIV
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