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Modified quartz sand andmodification method thereof

A quartz sand and modification technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of changing the composition of quartz sand, reuse of quartz sand adsorbent, regeneration and negative effects of recycling, etc. To achieve the effect of convenient recycling, easy realization, and increased surface area

Active Publication Date: 2015-05-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the surface modification method of the above-mentioned quartz sand has increased the surface area of ​​the quartz sand and improved the adsorption efficiency, it has also changed the composition of the quartz sand simultaneously. Glass preparation, etc.) have a negative impact on

Method used

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  • Modified quartz sand andmodification method thereof
  • Modified quartz sand andmodification method thereof
  • Modified quartz sand andmodification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Mix 0.3g P123 and 40 mlH2O, dissolve evenly at 25°C, then add 2g of quartz sand;

[0039] 2. Add 1ml of water glass to the mixture in step 1, stir evenly, then add 4ml of 1M hydrochloric acid solution under rapid stirring, and stir evenly; or add 4ml of 1M hydrochloric acid solution, stir well, then add 1ml of water glass, stir well;

[0040] 3. Transfer the reaction solution in step 2 to a shaker, and react at 25°C for 12 hours under the condition of gyrating and shaking (rotating frequency 200rpm), wash and filter after the reaction, dry the precipitate at 90°C for 3h, and then calcinate at 550°C for 6h , to obtain modified quartz sand samples. The specific surface area of ​​the obtained sample is shown in the table below:

[0041]

Embodiment 2

[0043] Take appropriate weight of P123 according to the table below, mix P123 with 40 ml H2O, dissolve evenly at 25°C, then add 2g of quartz sand and 1ml of water glass, stir at 25°C for 15min, then add 4ml under rapid stirring 1M hydrochloric acid solution; move the reaction solution to a shaker, and react at 60°C for 12h under the condition of gyrating shaking (rotating frequency 200rpm), wash and filter after the reaction, dry the precipitate at 90°C for 3h, and then calcinate at 550°C for 6h , to obtain modified quartz sand samples. The obtained samples were tested for specific surface area. The amount of P123 and the specific surface area of ​​the obtained sample are shown in the table below:

[0044]

Embodiment 3

[0046] Mix 0.3g P123 and 40 ml H2O, dissolve evenly at 25°C, then add 2g quartz sand and 1ml water glass, stir at 25°C for 15min, then add different volumes of 1M hydrochloric acid to dissolve under rapid stirring; The reaction solution was transferred to a shaker, and reacted at 25°C for 12 hours under the condition of gyrating and shaking (rotating frequency 200rpm), washed and filtered after the reaction, and the precipitate was dried at 90°C for 3h, and then calcined at 550°C for 6h to obtain a modified quartz sand sample . The obtained samples were tested for specific surface area. The consumption of hydrochloric acid and the specific surface area of ​​gained sample are shown in the table below:

[0047]

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Abstract

The invention discloses modified quartz sand and a modification method thereof. Aporous silicon dioxide coating layer is arranged on the surface of the modified quartz sand. The modified quartz sand is prepared through the following steps: adding water glass into a mixture of tri-block polymer P123, water and acid-pickled quartz sand first, then adding hydrochloric acid under quick stirring, and performing mixing uniformly,or adding hydrochloric acid first, then adding water glass and performing mixing uniformly; stirring an obtained reaction system uniformly, and performing a oscillating reaction so that the water glass reacts to generate silicon dioxide which covers the surface of the quartz sand; and after the reaction, taking out sediments, and washing, drying and calcining the sediments to obtain the modified quartz sand. According to the invention, cheap water glass is taken as a raw material, the quartz sand is modified by forming the porous silicon dioxide coating layer on the surface ofthe quartz sand, the method is simple to operate and easy to realize, the composition of the quartz sand is not changed while the surface area of the quartz sand is enlarged, and convenience is provided for recycling quartz sand which is used as an adsorbent or filter sand.

Description

technical field [0001] The invention relates to a modified quartz sand and a modification method thereof, in particular to a method for modifying the quartz sand with water glass and the modified quartz sand covered with a silicon dioxide coating layer on the surface of the quartz sand. Background technique [0002] Quartz sand (also known as silica sand) is a commonly used filter medium (such as the filter material of water filtration filter) and adsorbent. When used as an adsorbent, it has the disadvantages of small specific surface area, poor adsorption capacity, and low basic removal capacity for toxic substances (such as heavy metal ions, etc.), bacteria, viruses and organic matter in water. In order to improve the ability of quartz sand filter material to remove harmful ions in wastewater, people began to try to find a filter material that is both economical and effective. Modified filter material is one of them. It coats a layer of modifier on the surface of ordinary...

Claims

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Application Information

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IPC IPC(8): B01D39/06B01J20/10B01J20/30
Inventor 刘世权曲慧段惠敏张维娟宋鹏赵燕玲
Owner UNIV OF JINAN
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