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Preparation method and application of Schwertmannite

A technology of Shi's minerals and a new method, which is applied in the field of water pollution control and can solve the problems of rare preparation costs and other issues

Pending Publication Date: 2021-09-14
南京贝克特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention mainly aims at the problem that the existing adsorbents for removing As(III) pollutants in water cannot meet the processing requirements, and when using schtenberg minerals, the natural schtenberg minerals are very rare and the preparation cost is high, and provide a A new economical and effective method for the preparation of Shi's mineral, the prepared Shi's mineral adsorbent shows good adsorption activity for As(III), and can efficiently remove As(III) pollutants in water

Method used

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  • Preparation method and application of Schwertmannite
  • Preparation method and application of Schwertmannite
  • Preparation method and application of Schwertmannite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The present embodiment provides the preparation method of Shi's mineral adsorbent, comprises the steps:

[0045] Step (1): Acid dissolves scrap iron to 9.2mol / L H 2 SO 4 Add 56g of scrap iron (gray cast iron HT300) to the solution. Put it in a water bath to keep a constant temperature of 80°C for reaction, and stir continuously to make it fully react. When the solution in the beaker no longer produces bubbles, the reaction is considered to be over. After the completely reacted solution is filtered with a Buchner funnel, it is sealed with a triangular flask save.

[0046] Step (2): Formation of Shi's minerals, Fe after dissolution of scrap iron 2+ The concentration is 210mmol, add 150mmol H to the solution in 6 times 2 o 2 , and reacted at room temperature for 12 hours. After the sample was collected by filtration and washing, the Schwartz mineral adsorbent was obtained, and the sample was dried and preserved.

[0047] figure 1 It is the SEM image of the Shi's min...

Embodiment 2

[0050] This comparative example provides the preparation method of Shi's mineral adsorbent, comprises the steps:

[0051] Step (1): Acid dissolves scrap iron to 9.2mol / L H 2 SO 4 Add 56g of scrap iron (gray cast iron HT300) to the solution. Put it in a water bath to keep a constant temperature of 80°C for reaction, and stir continuously to make it fully react. When the solution in the beaker no longer produces bubbles, the reaction is considered to be over. After the completely reacted solution is filtered with a Buchner funnel, it is sealed with a triangular flask save.

[0052] Step (2): Formation of Shi's minerals, Fe after dissolution of scrap iron 2+ The concentration is 210mmol, add 150mmol H to the solution at one time 2 o 2 , reacted at room temperature for 12 hours. After the samples were collected by filtration and washing, the Schwartz mineral adsorbent was obtained, and the samples were preserved after drying.

[0053] The Shi Shi mineral that this comparati...

Embodiment 3

[0059] The present embodiment provides the preparation method of Shi's mineral adsorbent, comprises the steps:

[0060] Step (1): Acid dissolves scrap iron to 9.2mol / L H 2 SO 4Add 56g of scrap iron (gray cast iron HT300) to the solution. Put it in a water bath and keep it at a constant temperature of 70°C for reaction. Stir continuously to make it fully react. When the solution in the beaker no longer produces bubbles, it is considered that the reaction is over. save.

[0061] Step (2): Formation of Shi's minerals, Fe after dissolution of scrap iron 2+ The concentration is 210mmol, add 150mmolH to the solution 2 o 2 (adding in 6 times), react at room temperature for 4 hours. After the samples were collected by filtration and washing, the Schwartz mineral adsorbent was obtained, and the samples were preserved after drying.

[0062] According to the results of the total iron precipitation rate measurement points, after scrap iron was prepared into Shi's minerals and react...

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Abstract

The invention discloses a preparation method and application of Schwertmannite. The preparation method comprises the following steps: (1) preparing Schwertmannite by using waste iron as an iron source; and (2) removing As (III) in water by using the prepared Schwertmannite. According to the invention, waste iron blocks are prepared into Schwertmannite, wherein waste iron scraps are completely dissolved with excessive H2SO4, then the iron content is measured, the molar ratio of Fe to H2SO4 is controlled to be (0.9-1): 1, the use amount of all substances can be reasonably controlled, H2O2 is added in batches, the Fe<3+> supply speed is slowed down, the SO4<2-> content is increased, more outer-layer SO4<2-> complexes are generated, As (III) in water can be effectively removed by using the Schwertmannite as an adsorbent, the adsorption reaction time is short, the treated As (III) range is wide (10-200 mg / L), the maximum As (III) adsorption capacity under the same treatment condition is remarkably higher than that of an existing adsorbent, and the product has wide application prospects.

Description

technical field [0001] The invention belongs to the field of water pollution control, and in particular relates to a preparation method and application of Shi's mineral. Background technique [0002] Arsenic (As) is a toxic and carcinogenic substance widely distributed in nature. It is ubiquitous in the atmosphere, water, rocks and soil. Normal human tissues also contain trace amounts of arsenic. A moderate amount of arsenic is helpful for the synthesis of hemoglobin and can Promote the growth and development of the human body. In daily life, people may ingest arsenic through food, water, and air. When the human body takes in too much arsenic, it will cause arsenic poisoning. Excessive arsenic will interfere with the normal metabolism of cells, affect respiration and oxidation process, and make cells pathological. Arsenic can also directly damage the walls of small arteries and capillaries, and act on the vasomotor center, resulting in increased vascular permeability, decr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02C02F1/28B01J20/30C02F101/10
CPCB01J20/0281B01J20/0229B01J20/0262C02F1/281C02F2101/103
Inventor 周立祥李婷王晓萌
Owner 南京贝克特环保科技有限公司
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