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A kind of modified silica material and its preparation method and use

A silicon dioxide and modification technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as human and animal tumors, distortion, environmental pollution, etc., and achieve good separation effect , easy operation and high stability

Inactive Publication Date: 2019-07-02
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the radioactive pollution in life is mainly uranium and thorium, both of which are radioactive elements, which may cause tumors or distortions in humans and animals, and also cause pollution to the environment

Method used

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  • A kind of modified silica material and its preparation method and use
  • A kind of modified silica material and its preparation method and use
  • A kind of modified silica material and its preparation method and use

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Experimental program
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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with specific embodiments.

[0027] 1. Synthesis of modified silica

[0028] 1) Pretreatment of silica material: Wash the silica material with deionized water until the pH of the washing solution is similar to that of deionized water, remove excess water, and put it into a drying box to dry for 24 hours before use;

[0029] 2) Activation of the silica material: weigh about 30 g of the pretreated silica material in batches with an analytical balance into a 500 mL three-necked flask, add 100 mL of distilled water, and then slowly add 50 mL of methanesulfonic acid to prepare the mass fraction. For 33.3% methanesulfonic acid solution. Subsequently, a constant temperature magnetic stirrer was used for heating, a spherical condenser was added above the flask to form a cooling and reflux device, and a magnetron was added to adjust the rotation speed to make the silica particles evenly dispersed in ...

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Abstract

The invention relates to a modified silicon dioxide material which can be used as a composite adsorbent as well as a preparation method and application thereof. The modified silicon dioxide material is SiO2-DBAH; a SiO2-BDAH composite adsorbent can be generated by taking silicon dioxide as a raw material, carrying out APTS modification, and modifying the surface of silicon dioxide by using butanedioic anhydride (DBAH); the SiO2-BDAH composite adsorbent can be used for enriching and separating uranium and thorium in aqueous solutions. The method combines the advantages of high stability, acid resistance, alkali resistance, corrosion resistance, high temperature resistance, radioactive irradiation, high selectivity and high adsorption capacity of inorganic adsorbents, is simple and convenient to operate and excellent in separation effect, is capable of greatly accelerating the process of treating waste solutions with uranium and thorium, and is conducive to protection of ecological environment and living environment.

Description

technical field [0001] The present invention relates to a kind of modified silica material and its preparation method and use, especially a kind of SiO-based 2 -Materials of BDAH and preparation methods and uses thereof. Background technique [0002] Heavy metal ions and radioactive metal ions are increasingly polluting water bodies. There are many methods to treat excessive metal ions in water. Among them, adsorption is a simple and efficient method that can separate and adsorb heavy metal ions in water. Among various adsorption materials, inorganic adsorbents have high stability, acid and alkali corrosion resistance, high temperature resistance and radioactive irradiation, while organic adsorbents have high selectivity and adsorption capacity. There has been a big development. At present, there have been some related studies at home and abroad. For example, Hancock uses silica gel to support, and generates Schiff base through the reaction of coupling agent KH-550 and sal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/22C02F1/285C02F2101/20
Inventor 钱丽娟胡佩卓王海静钟毅林强吴王锁
Owner LANZHOU UNIVERSITY