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Sulfate radical sorbent magnetic nanometer zirconium hydroxide and preparation method thereof

A magnetic nano, zirconium hydroxide technology, applied in chemical instruments and methods, alkali metal oxide/hydroxide, adsorbed water/sewage treatment, etc., can solve problems such as difficulty in solid-liquid separation, achieve good dispersion stability, The effect of easy adsorption and improved utilization

Inactive Publication Date: 2013-01-16
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the removal of sulfate, zirconium hydroxide has the advantages of high removal rate, non-toxicity, simple operation, fast adsorption and desorption reaction rate, etc., but the disadvantage is that solid-liquid separation is difficult

Method used

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  • Sulfate radical sorbent magnetic nanometer zirconium hydroxide and preparation method thereof
  • Sulfate radical sorbent magnetic nanometer zirconium hydroxide and preparation method thereof
  • Sulfate radical sorbent magnetic nanometer zirconium hydroxide and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A kind of sulfate radical adsorbent magnetic nano zirconium hydroxide, it is prepared according to the following steps:

[0031] (1) Weigh 0.5262g Fe 3 o 4 Add nanoparticles to 40mL0.2mol / L sodium citrate solution for ultrasonic dispersion for 40min, then shake for 30min, magnetically separate the modified nano-magnetic ferric oxide, wash twice with absolute ethanol, and transfer to a three-necked flask , and then add 20mL deionized water, that is, water-based Fe 3 o 4 suspension;

[0032] (2) to Fe 3 o 4 Add 0.2674g polyethylene glycol to the suspension to dissolve; add 50mL0.5mol / LZrOCl dropwise at 9mL / min at a water bath temperature of 60°C and a stirring speed of 900rpm 2 Solution, then slowly add 2mol / L ammonia solution at a rate of 3mL / min until the pH is maintained at 10, then stop the dropwise addition; let it stand for aging for 30min to obtain sol precipitation, magnetically separate the solid product, and wash repeatedly with deionized water until the p...

Embodiment 2

[0044] A kind of sulfate radical adsorbent magnetic nano zirconium hydroxide, it is prepared according to the following steps:

[0045] (1) Modification of magnetic iron ferric oxide nanoparticles: Weigh the Fe prepared in Example 1 3 o 4 Add 0.8269g of nanoparticles into 50mL0.2mol / L sodium citrate solution and ultrasonically disperse for 30min, then vibrate for 15min, magnetically separate the modified magnetic ferric iron tetroxide nanoparticles, wash twice with absolute ethanol, transfer to the three-necked flask, and then add 20mL deionized water, which is the water-based Fe 3 o 4 suspension;

[0046] (2) to water-based Fe 3 o 4 Add 0.2087g polyethylene glycol to the suspension to dissolve. At a water bath temperature of 60°C and a stirring speed of 1000 rpm, 50 mL of 0.5 mol / L ZrOCl was added dropwise at 7.5 mL / min 2 Solution, then slowly add 2mol / L ammonia solution at a rate of 2.5mL / min, until the pH is maintained at 10, stop the dropwise addition; let it stand ...

Embodiment 3

[0052] Magnetic Fe 3 o 4 Preparation of nanoparticles: 0.5mol / L ferrous sulfate solution and 0.5mol / L ferric chloride solution are added to a three-necked flask at a molar ratio of 1:1.75, nitrogen gas is introduced, placed in a 65°C constant temperature water bath, Stir at 1200rpm while slowly adding analytically pure ammonia water dropwise, stop dropping when the pH is maintained at 9, continue to stir at a constant temperature for 30min, and obtain a black suspension. After magnetically separating the precipitate, wash it repeatedly with deionized water until the pH is neutral. Dry the precipitate under vacuum at 60°C for 12 hours, grind and pass through a 200-mesh sieve to obtain Fe 3 o 4 Nanoparticles.

[0053] A kind of sulfate radical adsorbent magnetic nano zirconium hydroxide, it is prepared according to the following steps:

[0054] (1) Modification of magnetic Fe3O4 nanoparticles: Weigh 1.9294g of the above-prepared Fe 3 o 4 Add nanoparticles into 80mL0.2mol / L...

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Abstract

The invention relates to a sulfate radical sorbent magnetic nanometer zirconium hydroxide and a preparation method thereof. The preparation method comprises the following steps: (1), modifying magnetic Fe3O4 nanoparticles; (2), under mechanical stirring, firstly, quickly dripping a ZrOC12 solution in a Fe3O4 suspending liquid, then slowly dripping an ammonia solution until the pH value is 9-10, followed by standing and aging so as to obtain wet sol sedimentation, and finally performing sedimentation washing and suction filtration; and (3), dissolving the wet sol in a n-butanol for azeotropic distillation, vacuum drying after the termination of the distillation, and extracting for grinding and sieving so as to obtain the sulfate radical sorbent magnetic nanometer zirconium hydroxide. According to the invention, the solid-liquid separation is easily realized after the adsorption of the sulfate radical sorbent; the magnetic field solid-liquid separation is simpler and convenient; and the water basically has no residual after the sulfate radical is desorbed, and the adsorption effect is good.

Description

technical field [0001] The invention relates to an adsorbent for removing sulfate radicals in water bodies, in particular to a sulfate radical adsorbent magnetic nano zirconium hydroxide and a preparation method thereof. Background technique [0002] Sulfate wastewater widely exists in mining, metallurgy, and chemical, pharmaceutical, food, printing and dyeing and other industrial production. High-concentration sulfate is converted into hydrogen sulfide or thiosulfide by sulfate-reducing bacteria under anaerobic conditions, which directly endangers human health and ecological balance. Hydrogen sulfide produced by sulfate-containing wastewater will seriously corrode pipelines, and at the same time, it will cause scaling in industrial production and affect production. The presence of sulfate will inhibit anaerobic microorganisms and increase the difficulty of biochemical treatment of wastewater. Therefore, it is of great significance to develop a high removal rate, cheap and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 鲍建国李念彭月娥洪岩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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