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Preparation method and application of Mg/Al layered double hydroxide and salt activated zeolite composite adsorption material

A technology of composite adsorption materials and hydroxides, applied in chemical instruments and methods, silicon compounds, chemical/physical processes, etc., can solve the problems of secondary pollution, stacking and hiding of adsorption sites, inability to adsorb ammonia nitrogen in water, etc., and achieve easy Exchange, increase the opportunity and rate of exchange, and increase the effect of ammonia nitrogen adsorption performance

Pending Publication Date: 2022-08-09
FUJIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, studies have shown that the traditional layered double hydroxide as an adsorption material mainly has the following shortcomings: ① The traditional layered double hydroxide adsorption material only has good adsorption performance for nitrate nitrogen, and cannot adsorb ammonia nitrogen in water. It is even more difficult to quickly and efficiently adsorb those at the same time; ②Traditional layered double hydroxide nanosheets are easy to agglomerate, with a small specific surface area, and a large number of adsorption sites are hidden by stacking, which has not been fully utilized; ③Nanolayered double hydroxide nanosheets After being dispersed into water, the powder material is easy to agglomerate, and it is difficult to collect by natural settlement, which is easy to cause secondary pollution; ④ The adsorption selectivity of traditional layered double hydroxide to nitrate nitrogen is poor. When there are other competing ions, its corresponding Nitrate nitrogen adsorption performance dropped sharply
⑤ The adsorption equilibrium time of pollutants required by most adsorbents is long, and it takes several hours or even longer to reach adsorption equilibrium

Method used

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  • Preparation method and application of Mg/Al layered double hydroxide and salt activated zeolite composite adsorption material
  • Preparation method and application of Mg/Al layered double hydroxide and salt activated zeolite composite adsorption material
  • Preparation method and application of Mg/Al layered double hydroxide and salt activated zeolite composite adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Mg / Al layer -like hydrogen oxide and salt activated boilestone composite adsorbing materials, including the following steps:

[0043] (1) When the natural boiler was washed with exfoliating water multiple times, grinded to the particle size of 100 meters, and the ball mill can be grinded;

[0044] (2) Place the zoom in the configured sodium chloride solution, and the concentration of the sodium chloride solution is 3 mol / L (17.53g naCl can be dissolved in 100ml of ionic water in this example, and 3mol / L NaCl solution is prepaid). The mass and volume ratio of amproof and sodium chloride solution is 1g: 10ml (in this embodiment can be 10g of zigza, 100ml of sodium chloride solution), stir 3h first, then stir up 1h, then add the same concentration to add the same concentration, then add the same concentration Sodium chloride solution, the mass and volume ratio of amproof and sodium chloride solution is 1g: 10ml (in this embodiment, 10g of zigza, 100ml of sodium chloride soluti...

Embodiment 2

[0049] Mg / Al layer -like hydrogen oxide and salt activated boilestone composite adsorbing materials, including the following steps:

[0050] (1) Washing naturally ished with exfoliating water multiple times, then grinded to the particle size of 100 meters;

[0051] (2) Place the zoom in the configuration of sodium acetate solution. The concentration of sodium acetate solution is 3 mol / L, the quality and volume ratio of the amproof and sodium acetate solution is 1g: 10ml, stir 4h first, then static for 2h, pour pour After the liquid is cleared, add the same concentration of sodium acetate solution, and continue to stir for 4h; wash the boilestone that is continuously modified with exfoliating water, and then put it in the environment of 70 ° C to get the salt activation of the boiler;

[0052] (3) Press metal ion mg 2+ / Al 3+ Moorby is 5: 1 prepaid metal salt solution, stir 40min to form an A solution; according to the quality ratio is 3: 2 to take salt activated boilite and lamina...

Embodiment 3

[0056] Mg / Al layer -like hydrogen oxide and salt activated boilestone composite adsorbing materials, including the following steps:

[0057] (1) Washing naturally ished with exfoliating water multiple times, then grinded to the particle size of 100 meters;

[0058] (2) Put the muffle in the configured ethyleine tethotate sodium solution, the concentration of the ethyleine tetrazide sodium solution is 3 mol / L, the quality and volume ratio of the amprole and ethylehthalamine sodium solution solution For 1:10, stir at 3.5h first, then stir up 1.5h, pour the clear liquid, then add the same concentration of ethyleine tetable sodium solution, continue to stir 3.5h; Ion water is washed multiple times, and then dried in the environment of 75 ° C to get salt activated boiler;

[0059] (3) Press metal ion mg 2+ / Al 3+ Moorby is 3: 1 prepaid metal salt solution, stir 35 minutes to form an A solution; according to the quality ratio is 3: 2 to take salt to activate boiletite and laminar dual -...

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Abstract

The invention discloses a preparation method of an Mg / Al layered double hydroxide and salt activated zeolite composite adsorption material, which comprises the following steps of: growing a layer of Mg / Al layered double hydroxide material on the surface of activated zeolite through an in-situ coprecipitation method by taking zeolite which is continuously activated by a salt solution or an alkali solution containing sodium ions in sequence as a substrate material; further, the composite material capable of rapidly adsorbing ammonia nitrogen and nitrate nitrogen at the same time is obtained.

Description

Technical field [0001] The present invention is the field of composite material preparation technology, which involves the preparation methods and applications of MG / AL layer -like hydrogen oxide and salt activated amporor composite adsorbing materials. Background technique [0002] With the continuous expansion of the urbanization scale, the dot sources and surface sources of nitrogen contaminated from human activities are continuously input water body, and many surface water sources are slightly polluted by nitrogen (the average concentration of ammonia nitrogen and nitrate nitrogen is about 2mg / L about 2mg / L. ), These nitrogen pollutants often use ammonia nitrogen (NH 4 + -N) and nitrate nitrogen (NO 3 -N) Coexistence is distributed in natural water. Excessive content of nitrogen pollutants in water can cause a series of problems related to human health such as high -speed rail hemoglobin disease, digestive tract cancer, and physiological defects. Therefore, research can remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30B01J41/10C02F1/42C02F101/16
CPCB01J20/08B01J20/165B01J41/10C02F1/42C02F2001/422C02F2101/16C02F2101/163C02F2103/007
Inventor 蒋柱武程顺健吴梦帆李妍叶均磊黄永捷
Owner FUJIAN UNIV OF TECH
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