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Magnetism recyclable nano adsorbent, preparation method and application thereof

A nano-adsorption and adsorbent technology, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effects of low production cost, simple experimental operation, and favorable recovery

Inactive Publication Date: 2015-05-06
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are many preparation techniques for spinel-structured adsorbents, commonly used are high-temperature solid-phase reaction method, microwave combustion method, hydrothermal stripping method, oxalic acid Salt co-precipitation method, reverse titration chemical co-precipitation method, microwave synthesis method, microemulsion precipitation method, etc., but the problems in these preparation processes cannot be ignored: high temperature and high pressure, cumbersome preparation steps, small yield, difficult recovery, high cost

Method used

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  • Magnetism recyclable nano adsorbent, preparation method and application thereof
  • Magnetism recyclable nano adsorbent, preparation method and application thereof
  • Magnetism recyclable nano adsorbent, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0019] Zinc salt, iron salt, NH 4 Preparation of zinc ferrite synthesized under the condition that the molar ratio of F is 1:2:2

[0020] Dissolve zinc salt, iron salt, NH at a molar ratio of 1:2:2 in ethylene glycol 4 F. Pour it into a solvothermal reaction kettle, and keep it warm at 150-200°C for 8-16 hours. Afterwards, the reaction product is washed and dried, and put into a muffle furnace for calcination at a heating rate of 2-8°C / min and 300-800°C for 1-3 hours. Wait for natural cooling to obtain zinc ferrite powder adsorbent.

[0021] figure 1 (a) Zinc salt, iron salt, NH 4 The molar ratio of F is 1:2:2. The adsorption of Congo red to zinc ferrite synthesized by F is 60min, and the adsorption amount is about 75mg / g. figure 2 (a) Zinc salt, iron salt, NH 4 The molar ratio of F is 1:2:2 synthesized zinc ferrite to Pb 2+ The adsorption capacity is about 80mg / g.

Embodiment 2

[0023] Zinc salt, iron salt, NH 4 Preparation of Zinc Ferrite Synthesized under the Molar Ratio of F 1:2:4

[0024] Dissolve zinc salt, iron salt, NH in ethylene glycol with a molar ratio of 1:2:4 4 F. Pour it into a solvothermal reaction kettle, and keep it warm at 150-200°C for 8-16 hours. Afterwards, the reaction product is washed and dried, and put into a muffle furnace for calcination at a heating rate of 2-8°C / min and 300-800°C for 1-3 hours. Wait for natural cooling to obtain zinc ferrite powder adsorbent.

[0025] figure 1 (b) is zinc salt, iron salt, NH 4 The molar ratio of F is 1:2:4, and the adsorption time of Congo red to zinc ferrite is 40min, and the adsorption amount is about 75mg / g. The illustration in Figure (1) shows zinc salt, iron salt, NH 4 The adsorption photos of Congo red on zinc ferrite with a molar ratio of F of 1:2:4, it can be seen that after 40 minutes of adsorption, it is basically close to transparent. figure 2 (b) is zinc salt, ir...

Embodiment 3

[0027] Preparation of Magnesium Ferrite with Hydrothermal Temperature of 180℃

[0028] Dissolve the magnesium salt and iron salt with a molar ratio of 1:2 in ethylene glycol successively. Pour it into a solvothermal reaction kettle, and keep it warm at 180°C for 8-16 hours. Afterwards, the reaction product is washed and dried, and put into a muffle furnace for calcination at a heating rate of 2-8°C / min and 300-800°C for 1-3 hours. Wait for natural cooling to obtain magnesium ferrite powder adsorbent.

[0029] image 3 In (a) is magnesium ferrite to Pb 2+ The time required to reach equilibrium is 20 minutes, and the adsorption amount is 90 mg / g. (b) is the adsorption of magnesium ferrite to Congo red. The time required to reach equilibrium is 60 minutes, and the adsorption amount is about 125 mg / g.

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Abstract

The invention discloses a preparation method of a magnetism recyclable nano adsorbent. The preparation method comprises the following steps: dissolving a proper amount of zinc salt (or magnesium salt) into glycol, adding moderate ferric salt and NH4F to dissolve, uniformly stirring, performing solvothermal reaction on the obtained solution, washing and drying reaction product, placing in a muffle furnace to calcinate, and waiting for naturally cooing to obtain a zinc ferrite or magnesium ferrite powder adsorbent. The adsorbent prepared by the solvothermal method has dual adsorption capacity on organic dye Congo red and heavy metal Pb2+. The preparation cost is low, and the process is simple; the prepared adsorbent is stable and excellent in property and good in repeatability, and the magnetism is recyclable. The adsorbent material can be widely applied to governing aspects such as heavy metal pollution and organic dye pollution.

Description

technical field : [0001] The invention relates to a preparation method of a magnetic recyclable nano-adsorbent, which can be used in the treatment of heavy metal pollution, organic dye pollution and the like. Background technique : [0002] According to the "2015-2020 China Sewage Treatment Industry Market Prospect and Investment Strategic Planning Analysis Report Prospect", 70% of China's 1.3 billion population drink groundwater, and more than 400 of the more than 660 cities use groundwater as their drinking water source . However, according to reports, 90% of the urban groundwater in the country has been polluted, so the water pollution in our country is showing an increasingly serious trend. The problem of domestic water seriously affects the long-term development of society and the national economy. Water governance in environmental protection issues is imminent, and it is also one of the hot spots of many environmentalists and water researchers. [0003] At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30B01J20/28C01G49/00B82Y30/00B82Y40/00C02F1/28
CPCB01J20/02B01J20/28002B01J20/28009B01J20/3028B01J20/3085B01J2220/42B82Y30/00B82Y40/00C01G49/0063C02F1/281C02F2101/20C02F2101/308
Inventor 孙小华罗伟龙
Owner CHINA THREE GORGES UNIV
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