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Binary magnesium-aluminum hydrotalcite and use thereof as disinfectant

A technology of hydrotalcite and disinfectant, applied in the directions of disinfectant, application, biocide, etc., can solve the problems of influence of disinfection effect, destruction of reproductive function, and high cost, and achieve the effect of good lasting effect of disinfection, simple preparation, and water purification.

Active Publication Date: 2013-07-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The sterilization and disinfection methods used in mariculture include ultraviolet disinfection and ozone disinfection. The above-mentioned sterilization and disinfection methods have the following defects: 1. Ultraviolet disinfection: Utilize ultraviolet radiation to change the DNA of bacteria, destroy their reproductive function, and kill the bacteria. Although the effluent is colorless, odorless and has no by-products, the disinfection effect is affected by suspended solids in the water, and the cost is high
2. Ozone disinfection: Ozone has strong lethality to microorganisms in water, and can remove color, smell, taste and soluble inorganic salts, but has no continuous antivirus effect and high cost, but if the dosage is improper, it will produce toxic side effects product, large investment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare 100mL 0.5mol / L Mg(NO 3 ) 2 and 0.25mol / L Al(NO 3 ) 3 The mixed solution is solution A. Prepare 100mL of 1.5mol / LNaOH and 0.25mol / L KClO 3 The mixed solution is solution B. in N 2 Under protection and vigorous stirring, slowly drop solution A and solution B into 100mL deCO 2 Stir vigorously in deionized water, control the pH of the reaction solution between 10±0.2, continue to stir for 30min after the dropwise addition, crystallize at 65°C for 48h, then centrifuge the product, wash with deionized water, and vacuum dry to obtain ClO 3 - Intercalated Mg, Al hydrotalcite [Mg 2 / 3 Al 1 / 3 (OH) 2 ](ClO 3 ) 1 / 3 2H 2 O 9.2g. When pH = 4 (adjust pH = 4 with acetic acid), weigh 0.5 g of the prepared Mg and Al hydrotalcite and add it to 100 mL of 2% NaCl solution, and react for 30 minutes to produce Cl 2 The concentration is 1.83mg / L.

Embodiment 2

[0019] When pH = 5 (adjust pH = 5 with acetic acid), weigh 0.5 g of the Mg and Al hydrotalcites prepared in Example 1 and add them to 100 mL of 2% NaCl solution, and react for 30 minutes to produce Cl 2 The concentration is 1.37mg / L.

Embodiment 3

[0021] When pH = 6 (adjust pH = 7 with acetic acid), weigh 0.5 g of the Mg and Al hydrotalcites prepared in Example 1 and add them to 100 mL of 2% NaCl solution, and react for 30 minutes to produce Cl 2 The concentration is 1.05mg / L.

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PUM

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Abstract

The invention discloses binary magnesium-aluminum hydrotalcite, which has the chemical general formula of [Mg2+1-xAlx3+(OH)2]x+(ClO3-)x.mH2O, wherein x is a molar ratio of Al3+ to (Mg2++Al3+) and is more than or equal to 0.2 and less than or equal to 0.4; and m is number of crystal water and is more than or equal to 2 and less than or equal to 6. The invention also discloses use of the binary magnesium-aluminum hydrotalcite as a disinfectant, in particular as a water disinfectant in mariculture. The Mg and Al hydrotalcite intercalated by ClO3- can slowly release ClO3-, and the ClO3- is reacted with Cl- in water for mariculture to constantly and stably form a small amount of Cl2 for disinfecting the water; therefore, in mariculture, the binary magnesium-aluminum hydrotalcite can be directly put into the water for the mariculture, and the generated Cl2 is utilized for disinfecting the water; meanwhile, by utilizing the adsorption of the Mg and Al hydrotalcite intercalated by ClO3-, anionic harmful substances in seawater can be adsorbed to fulfill the aim of effectively purifying the water.

Description

(1) Technical field [0001] The present invention relates to a kind of ClO 3 - Intercalated Mg, Al hydrotalcites and their use as disinfectants in mariculture. (2) Background technology [0002] Hydrotalcite (Layered double hydroxides, LDHs for short) is a kind of anionic layered clay, its chemical formula is [M 1-x 2 +M x 3+ (OH) 2 ] x+ A x / n n- mH 2 O (where M 2+ and M 3+ represent divalent and trivalent metal cations, respectively, x is Al 3+ / (Mg 2+ +Al 3+ ) ratio of the amount of substance, A n- Indicates the anions that can be exchanged between the layers, and m is the number of water molecules between the layers). Due to the unique layered structure of hydrotalcite, the controllability of laminate composition and the exchangeability of interlayer anions, it has a wide range of applications in catalysis, medicine, adsorption and flame retardancy, and has a broad prospect for development and utilization. [0003] The sterilization and disinfection method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/00A01N25/08A01P1/00C02F1/50A01K61/00
CPCY02A40/81
Inventor 王力耕林文权倪哲明袁庭郑立王恒定施炜
Owner ZHEJIANG UNIV OF TECH