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Preparation method of MnO2/Fe3O4 compound adsorbent

A composite adsorption and static sedimentation technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as difficult separation, and achieve the effect of easy operation and simple separation method

Active Publication Date: 2011-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention will solve MnO 2 It is not easy to separate, which limits its technical problems in water treatment; and provides MnO 2 / Fe 3 o 4 The preparation method of composite adsorbent

Method used

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  • Preparation method of MnO2/Fe3O4 compound adsorbent
  • Preparation method of MnO2/Fe3O4 compound adsorbent
  • Preparation method of MnO2/Fe3O4 compound adsorbent

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specific Embodiment approach 1

[0008] Specific embodiment 1: MnO in this embodiment 2 / Fe 3 O 4 The preparation method of the composite adsorbent is carried out according to the following steps: 0.45mol FeSO 4 ·7H 2 O was dissolved in 200mL of ionized water, and then placed in the anaerobic operating table, and then 1.2mol NaOH was added. After the blue-green flocculation appeared, the glass rod was quickly stirred and mixed, and then poured into the 0.1molKMnO 4 In the beaker, stir until KMnO 4 When completely dissolved, let it settle for 1~2h, filter out the supernatant, rinse the precipitate repeatedly with deionized water until the washing liquid becomes neutral, then place the precipitate in a vacuum drying oven at 40-60℃ Dry for 5-7h, grind into powder form to obtain MnO 2 / Fe 3 O 4 Composite adsorbent.

[0009] MnO in the composite adsorbent prepared by the method of this embodiment 2 The distribution is relatively uniform, the particle size distribution ranges from 1 to 100μm, and the manganese dioxide i...

specific Embodiment approach 2

[0010] Specific embodiment two: this embodiment is different from specific embodiment one in that the quiet time is 1h. The other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the drying temperature is 50°C. The other steps and parameters are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a compound adsorbent, in particular to a preparation method of an MnO2 / Fe3O4 compound adsorbent. The invention aims to solve the technical problem that MnO2 is not easy to separate, so the application of MnO2 to water treatment is limited. The preparation method comprises the following steps: dissolving FeSO4.7H2O into deionized water at room temperature, then putting the solution into an anaerobic operating floor, then adding NaOH, stirring the solution rapidly to mix the matters uniformly with a glass rod after bluish green flocculates appear, then pouring the solution to a beaker filled with KMnO4, stirring the solution until KMnO4 is completely dissolved, carrying out static precipitating, removing the supernatant through filtration, repeatedly washing the precipitate, then drying the precipitate and grinding the precipitate into powder to obtain the MnO2 / Fe3O4 compound adsorbent. The compound adsorbent for adsorbing the heavy metalcan be separated from water by a magnet and the separation method is simple and easy to operate.

Description

Technical field [0001] The invention relates to a preparation method of a composite adsorbent. Background technique [0002] Adsorption has always attracted attention due to its high efficiency of adsorption of low concentration heavy metals, high economic efficiency and strong operability. Compared with Fe, Al, Mn, Zn and other metal oxides, MnO 2 The strongest affinity with heavy metal ions. But MnO 2 The shortcomings of low apparent density, easy formation of ultrafine particles in water, and difficult separation, limit the application in water treatment. Summary of the invention [0003] The present invention is to solve MnO 2 It is not easy to separate, which limits its application in water treatment technical problems; and provides MnO 2 / Fe 3 O 4 Preparation method of composite adsorbent. [0004] MnO 2 / Fe 3 O 4 The preparation method of the composite adsorbent is carried out according to the following steps: 0.45mol FeSO 4 ·7H 2 O was dissolved in 200mL of ionized water, ...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30
Inventor 何皎洁赵志伟刘杰
Owner HARBIN INST OF TECH
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