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Preparation method and application of layered double metal hydroxide bloom alga remover

A layered bimetallic and hydroxide technology, which is applied in the fields of oxide/hydroxide preparation, chemical instruments and methods, zinc oxide/zinc hydroxide, etc., can solve the problem of unseen system analysis and testing, and the difficulty of controlling the industrialization of reaction results Application and other issues, to achieve the effect of avoiding secondary chemical pollution, convenient implementation, and fast settlement speed

Inactive Publication Date: 2015-05-13
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research results are all sporadic and scattered random experimental results obtained by various researchers under specific experimental conditions. There is no systematic analysis and test, and the reaction results are difficult to control, which has become a bottleneck for industrial applications.

Method used

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  • Preparation method and application of layered double metal hydroxide bloom alga remover
  • Preparation method and application of layered double metal hydroxide bloom alga remover
  • Preparation method and application of layered double metal hydroxide bloom alga remover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Step 1: ZnSO with a molar ratio of 2.7:1 4 ·7H 2 O and Al(NO 3 ) 3 9H 2 O mixed and dissolved in distilled water to prepare a mixed salt solution, and NaOH and anhydrous Na with a molar ratio of 2:1 2 CO 3 Mix and dissolve in distilled water to form a mixed alkali solution;

[0053] Step 2: Add the mixed alkali solution and the mixed salt solution with a volume ratio of 1.8:1 to the vigorously stirred reaction vessel dropwise at the same time, keep the slurry in the reaction vessel at a constant temperature of 75°C during the dropwise addition process, and maintain the temperature in the reactor during the dropwise addition process. The pH value of the slurry is between 9.8 and 10.3. After the dropwise addition, continue to stir at a constant temperature for 1 hour to make it fully mixed and reacted;

[0054] Step 3: aging the reacted slurry in a water bath at 65°C for 6 hours;

[0055] Step 4: Wash the resultant with water until neutral, dry at 80°C, and sieve t...

Embodiment 2

[0058] Step 1: ZnSO with a molar ratio of 2.5:1 4 ·7H 2 O and Al(NO 3 ) 3 9H 2 O mixed and dissolved in distilled water to prepare a mixed salt solution, and NaOH and anhydrous Na with a molar ratio of 2:1 2 CO 3 Mix and dissolve in distilled water to form a mixed alkali solution;

[0059] Step 2: Add the mixed alkali solution and the mixed salt solution with a volume ratio of 1.7:1 into the vigorously stirred reaction vessel dropwise at the same time, keep the slurry in the reaction vessel at a constant temperature of 65°C during the dropwise addition process, and maintain the temperature in the reactor during the dropwise addition process The pH value of the slurry is between 9.8 and 10.3. After the dropwise addition, continue to stir at a constant temperature for 1 hour to make it fully mixed and reacted;

[0060] Step 3: aging the reacted slurry in a water bath at 65°C for 10 hours;

[0061] Step 4: Wash the resultant with water until neutral, dry at 80°C, and sieve...

Embodiment 3

[0064] Step 1: Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O mixed and dissolved in distilled water to prepare a mixed salt solution, and NaOH and anhydrous Na with a molar ratio of 3:1 2 CO 3 Mix and dissolve in distilled water to form a mixed alkali solution;

[0065] Step 2: Add the mixed alkali solution and the mixed salt solution with a volume ratio of 1.2:1 to the vigorously stirred reaction vessel dropwise at the same time, keep the slurry in the reaction vessel at a constant temperature of 80°C during the dropwise addition process, and maintain the temperature in the reactor during the dropwise addition process. The pH value of the slurry is between 9.8 and 10.3. After the dropwise addition, continue to stir at a constant temperature for 1 hour to make it fully mixed and reacted;

[0066] Step 3: aging the reacted slurry in a water bath at 70°C for 16 hours;

[0067] Step 4: washing the resultant with water until neutral, drying at 80° C., and sieving to obtain a ...

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Abstract

The invention discloses a preparation method and an application of a layered double metal hydroxide bloom alga remover. According to the bloom alga remover, a bivalent and trivalent metal combination reacts with alkali to prepare layered double metal hydroxide, and negatively charged algal cells in water are electrostatically adsorbed and flocculated by utilizing a characteristic that laminates of the layered double metal hydroxide are positively charged, so that algae in the water are removed; the prepared layered double metal hydroxide is high in charge density of the laminates, 0.758 nm in interlayer spacing and 20-50 microns in powder size, and the bloom alga remover is good in alga removal performance; the removal rate of the layered double metal hydroxide to algal chlorophyll a is more than 94.62%; the preparation method adopted by the invention is simple, the obtained powder material is good in crystal form and morphology, the alga removal process is simple, formed algal flocs are good in settling performance and can be separated from the water quickly, and the alga remover is low in consumption and low in cost.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a preparation method and application of a layered double metal hydroxide bloom algae remover. Background technique [0002] Layered double hydroxide is a new type of material with many special properties such as anion exchange, adsorption, thermal stability, structural memory effect, acid-base bifunctionality and catalytic performance. Research at home and abroad shows that it has potential application value in many fields such as catalysis, ion exchange and adsorption, medicine, and biology. In recent years, it has also attracted much attention in the field of water treatment. Studies have found that it has a good removal effect on anion pollutants and heavy metal ions. [0003] With the development of social economy and the acceleration of industrialization, more and more nitrogen and phosphorus pollutants are discharged into the water body, which leads to the aggravation of ...

Claims

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Application Information

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IPC IPC(8): C01B13/14C02F1/52C01F7/02C01G9/02C01G3/02
CPCC01G9/006C02F1/5236C01P2004/61C01P2006/17C01P2002/72C01P2002/82C01P2002/78C01P2004/03C01F7/785
Inventor 李绍秀黄婷王志红李冬梅梅胜蒋树贤李斌
Owner GUANGDONG UNIV OF TECH
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