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Preparation method of heavy metal ion porous magnetic ceramsite adsorbent

A technology for heavy metal ions and adsorbents, applied in the directions of alkali metal compounds, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of difficult to achieve large-scale production applications, high production equipment requirements, and complex technological processes. Achieve the effect of low production equipment requirements, low cost and simple preparation process

Inactive Publication Date: 2017-09-15
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Among the above-mentioned existing methods for preparing heavy metal ion adsorbents, most of them have high requirements on production equipment, complicated process, and common problems of low yield and high cost, which are only suitable for laboratory research and difficult to realize large-scale production and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Crushing and ball milling the coal gangue into powder, then sieving through a 1000-mesh standard sieve, and drying at a constant temperature at 100°C for 6 hours;

[0025] 2. Weigh the raw material powder of coal gangue and put it in the Eilixu powerful mixer, continuously add polyvinyl alcohol aqueous solution with a mass concentration of 1% to process it into ceramic raw meal balls, and then put the ceramic raw meal balls under the condition of 50 ℃ Sieve after drying, and then sinter the dried and sieved raw meal balls at a constant temperature of 1000°C for 3 hours to make a particle size of 0.5mm and an apparent density of 2.2cm 3 / g ceramic matrix;

[0026] 3. Weigh the ceramic substrate and place it in an aqueous nitric acid solution with a concentration of 50wt%, and stir and impregnate it in a water bath at 40°C for 2 hours. The volume ratio of the mass of the ceramic substrate to the aqueous nitric acid solution is 1g: 15 ml;

[0027] 4. Wash the above cer...

Embodiment 2

[0032] 1. Crushing and ball milling the coal gangue into powder, then sieving through a 1000-mesh standard sieve, and drying at a constant temperature at 100°C for 6 hours;

[0033] 2. Weigh the raw material powder of coal gangue and put it in the Eilixu powerful mixer, continuously add polyvinyl alcohol aqueous solution with a mass concentration of 1% to process it into ceramic raw meal balls, and then put the ceramic raw meal balls under the condition of 50 ℃ Sieve after drying, and then sinter the dried and sieved raw meal balls at a constant temperature of 1000°C for 3 hours to make a particle size of 0.5mm and an apparent density of 2.2cm 3 / g ceramic matrix;

[0034] 3. Weigh the ceramic substrate and place it in an aqueous nitric acid solution with a concentration of 50wt%, and stir and impregnate it in a water bath at 40°C for 2 hours. The volume ratio of the mass of the ceramic substrate to the aqueous nitric acid solution is 1g: 15 ml;

[0035] 4. Wash the above cer...

Embodiment 3

[0040] 1. Crushing and ball milling the coal gangue into powder, then sieving through a 1000-mesh standard sieve, and drying at a constant temperature at 100°C for 6 hours;

[0041] 2. Weigh the raw material powder of coal gangue and put it in the Eilixu powerful mixer, continuously add polyvinyl alcohol aqueous solution with a mass concentration of 1% to process it into ceramic raw meal balls, and then put the ceramic raw meal balls under the condition of 50 ℃ Sieve after drying, and then sinter the dried and sieved raw meal balls at a constant temperature of 1000°C for 3 hours to make a particle size of 0.5mm and an apparent density of 2.2cm 3 / g ceramic matrix;

[0042] 3. Weigh the ceramic substrate and place it in an aqueous nitric acid solution with a concentration of 50wt%, and stir and impregnate it in a water bath at 40°C for 2 hours. The volume ratio of the mass of the ceramic substrate to the aqueous nitric acid solution is 1g: 15 ml;

[0043] 4. Wash the above cer...

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Abstract

The invention relates to a preparation method of a heavy metal ion porous magnetic ceramsite adsorbent, and belongs to the field of preparation of adsorbents. The preparation method is characterized by comprising the following steps of processing coal gangue into raw powder; synthesizing into ceramic raw balls by an Eirich strong mixing machine; screening the raw balls, and sintering, so as to obtain a ceramic substrate with certain particle size range; performing acidifying and hydrophilic treatment on the ceramic substrate, placing into a precursor solution which is dissolved with metal ions of Fe<3+> or Co<2+> or Ni2; introducing the precursor solution by a liquid phase synthesizing method; finally, performing thermal reduction, so as to obtain the porous magnetic ceramsite adsorbent which is loaded with metal element of Fe (iron) or Co (cobalt) or Ni (nickel). The preparation method has the advantages that the ceramsite has stronger adsorbing characteristics on the heavy metal ions, the magnetic separation is easy, the recycling and reutilizing effects are realized, and the ceramsite can be widely applied to treatment of industrial wastewater; by utilizing the coal gangue, the utilization of solid wastes is realized; the cost is low, and the effect of treating wastes by wastes is realized.

Description

technical field [0001] The technical field of the preparation of the adsorbent of the present invention specifically relates to a method for preparing a heavy metal ion porous magnetic ceramsite adsorbent. Background technique [0002] Coal gangue is industrial solid waste discharged during coal mining and coal washing. It is a low calorific value fuel that contains a certain amount of combustibles and a large number of usable minerals associated with coal seams during the coal formation process. The long-term and continuous accumulation and discharge of coal gangue not only occupies a large amount of land, but also pollutes the environment, water resources, and land resources, and the resulting solid dust pollution has caused serious harm to the ecological environment. With the development of circular economy, solid waste is called "misplaced resources". Therefore, the treatment and resource utilization of coal gangue has become an urgent problem to be solved in building a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/02B01J20/0225B01J20/0229B01J20/28009C02F1/281C02F2101/20
Inventor 力国民朱保顺田玉明王凯悦周毅武雅乔梁丽萍郝建英邹欣伟柴跃生白频波李占刚
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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