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Zero-valent iron-carrying nano compound resin for catalyzing and degrading pollutant and preparation method

A nano-composite, catalytic degradation technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as large head loss

Inactive Publication Date: 2009-07-08
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a zero-valent iron-loaded nanocomposite resin and a preparation method for catalytically degrading pollutants, aiming at the problem of large pressure head loss when nano-zero-valent iron is stabilized and fine-grained nano-zero-valent iron is directly applied, and the impact on water The technical problem of pre-enrichment of inorganic anion pollutants and organic pollutants in the environment can effectively solve the above problems, thus providing technical support for the deep purification and safety control of trace organic or inorganic pollutants in environmental media

Method used

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  • Zero-valent iron-carrying nano compound resin for catalyzing and degrading pollutant and preparation method
  • Zero-valent iron-carrying nano compound resin for catalyzing and degrading pollutant and preparation method

Examples

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Effect test

Embodiment 1

[0027] A zero-valent iron-loaded nanocomposite resin that catalyzes the degradation of pollutants. Its preparation method is as follows: use NDA-88 (containing amino groups, produced by Jiangsu Nanda God Environmental Protection Technology Co., Ltd.) resin as a carrier, soak it in FeCl 3 ·6H 2 In a NaCl saturated solution of O, FeCl in this solution 3 The concentration is 0.2mol / L, the concentration of hydrochloric acid is 1mol / L, and the solid-liquid weight ratio is 1:3. Oscillation, ion exchange 4h, and then filter. NaBH with a concentration of 0.2mol / L 4 or KBH 4 The aqueous solution is mixed with the filtered resin until there are no more bubbles in the solution. After the reaction, at N 2 The resin was filtered under protection, washed with distilled water and ethanol, and vacuum-dried at 30° C. for 24 hours to obtain a nanocomposite resin loaded with pure zero-valent iron. The inner and outer surfaces of the resin are immobilized with pure nanometer zero-valent ir...

Embodiment 2

[0032] A zero-valent iron-loaded nanocomposite resin that catalyzes the degradation of pollutants. The preparation method is as follows: use NDA-99 (containing amino groups, produced by Jiangsu Nanda God Environmental Protection Technology Co., Ltd.) resin as a carrier, soak the resin in FeSO 2 ·7H 2 In a NaCl saturated solution of O, FeSO in this solution 2 The concentration is 0.3mol / L, the concentration of hydrochloric acid is 2mol / L, and the solid-liquid weight ratio is 1:4. Oscillation, ion exchange 8h, and then filter. NaBH with a concentration of 0.5mol / L 4 or KBH 4 The aqueous solution (wherein the volume ratio of ethanol is 5%) is mixed and reacted with the filtered resin until no bubbles emerge from the solution. After the reaction, the resin is filtered, rinsed with distilled water and ethanol, slowly exposed to an oxygen-containing environment for 24 hours, and dried at 40° C. for 10 hours to obtain a zero-valent iron-loaded nanocomposite resin with a core-she...

Embodiment 3

[0037] A zero-valent iron-loaded nanocomposite resin that catalyzes the degradation of pollutants. Its preparation method is: use D-201 (containing quaternary amino, produced by Hangzhou Zhengguang Resin Co., Ltd. and Jiangsu Nanda God Environmental Protection Technology Co., Ltd.) resin as a carrier, soak it in FeCl 3 ·6H 2 In a NaCl saturated solution of O, FeCl in this solution 3 The concentration is 0.4mol / L, the concentration of hydrochloric acid is 3mol / L, and the solid-liquid weight ratio is 1:5. Oscillation, ion exchange 10h, and then filter. NaBH with a concentration of 0.8mol / L 4 or KBH 4 The aqueous solution (wherein the volume ratio of ethanol is 10%) is mixed and reacted with the filtered resin until no bubbles emerge from the solution. After the reaction, at N 2 Filter the resin under protection, rinse with distilled water and ethanol, and then soak in PdCl with a concentration of 0.1mol / L 2 in solution for 5h, then in N 2 The resin was filtered under pro...

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Abstract

The invention discloses a zero-valent iron carrying nanometer composite resin for catalytic degradation of pollutants and a preparation method thereof. The zero-valent iron nanometer composite resin has the following structures: (1) the carrier of the nanometer composite resin is an ion-exchange and adsorption resin having alkali functional group; (2) the internal and external surfaces of the carrier support nanometer sized zero-valent iron series inorganic materials. The zero-valent iron nanometer composite resin is prepared by leading FeCl4 ion onto the internal and external surfaces of the resin by ion-exchange, deoxidizing the FeCl4 ion into nanometer zero-valent iron and obtaining the zero-valent iron carrying nanometer composite resin by washing and drying under the protection of N2. The composite resin integrates the Donnan preenrichment effect of the resin on the inorganic anionic pollutants in the water body and the high-efficient catalytic degradation effect of the nanometer zero-valent iron on the environmental pollutants, overcomes the shortcomings of easy conglobation, unstable chemical property, small particles and big loss of the pressure head of the nanometer zero-valent iron particles and has fast, high-efficient and low-cost catalytic degradation toward the micro-pollutants in the environment.

Description

technical field [0001] The invention relates to a high-performance environmental functional composite material for catalytically degrading trace pollutants in environmental media, more specifically a zero-valent iron-loaded nanocomposite resin for catalytically degrading pollutants and a preparation method thereof. Background technique [0002] In recent years, a large number of studies have shown that nano-zero-valent iron is an efficient reducing agent, which has many characteristics such as high specific surface area, good catalytic activity, low cost, and environmental friendliness. It is widely used in the catalytic dechlorination and dechlorination of halogenated organic compounds. Catalytic degradation of bromine, nitro compounds, ClO 4 - and NO 3 - Research on the catalytic degradation of inorganic anion pollutants, as well as the practical application of groundwater remediation (Zhang W.X.Nanoscale ironparticles for environmental remediation: An review.Journal of...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/74B01J23/80B01J23/89B01J23/72B01J23/889B01J21/02B01J31/08B01J37/30B01J37/16B01J37/02A62D3/34A62D3/00C02F1/42C02F1/70
Inventor 张炜铭蒋珍茂潘丙才吕路杜琼张全兴
Owner NANJING UNIV
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