Preparation method, product and application of catalytic activity nano particle loaded absorbent

A technology of loading catalysis and nanoparticles, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of low treatment efficiency, small adsorption capacity, narrow application range, etc., and reduce process steps , The raw material is cheap and easy to get, and the effect of improving the removal efficiency

Inactive Publication Date: 2011-08-17
ZHEJIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, each adsorbent also has significant deficiencies: although activated carbon has a large adsorption capacity and high adsorption efficiency, it is difficult to regenerate and has a low degree of reutilization; although ion exchange resins are reproducible, they are expensive and have limited exchange capacity. Requirements can only be met after multiple regenerations and exchanges; although diatomite is cheap, its adsorption capacity is small and its application range is narrow
[0005] The current advanced oxidation technology is mainly based on solution homogeneous reaction. Although the treatment effect is ideal, there is also the problem of loss of catalyst components after the reaction, which is not conducive to recycling and continuous operation of the production process; on the other hand, in high-concentration wastewater During the treatment, there are also problems such as low treatment efficiency caused by the large consumption of oxidants by organic matter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] At 25℃, take the strong acid cation exchange resin-D001 resin for pretreatment, namely washing with ethanol for 6 hours, washing with 1mol / L hydrochloric acid for 6 hours, and then washing with water to neutrality, and then putting the pretreated D001 resin in 1mol / L sulfuric acid In a mixed solution composed of iron and 1mol / L ferrous chloride, fully stirred at 25°C under argon protection for 4 hours, then filtered, and the filtered resin adsorbing metal ions was washed with water until the lotion became colorless. Immerse the washed adsorbent resin in water, slowly dropwise add saturated ammonia water until the pH of the solution is 13, and keep the reaction for 24 hours. The resin was filtered out, washed with water, and then aged in a 60°C water bath for 1 hour to obtain metallic luster black round particles: supporting catalytically active ferroferric oxide nanoparticles D001 resin adsorbent, and the metal ion loading amount was 1.6 mmol / g. Add the prepared adsorben...

Embodiment 2

[0030] Other conditions are the same as in Example 1, except that the metal salt solution used is 1 mol / L iron sulfate. The obtained D001 resin adsorbent loaded with nanometer iron oxide particles is red-brown round particles with metallic luster, and the metal ion loading amount is 1.5 mmol / g. Add the prepared adsorbent and hydrogen peroxide to 100 mL of phosphorus-containing wastewater (TP=1000, COD=6000) with a pH of 4 to 5, and the amount of nano-particle adsorbent is 5% (v / v: adsorbent / Wastewater), the amount of hydrogen peroxide is 1% (v / v, hydrogen peroxide / waste water), stirred at room temperature for 2 hours, filtered, and the treated solution is tested. The test results are: the organic phosphorus conversion rate is 30%, and the total phosphorus removal rate can reach 20 %, the total organic carbon removal rate is 20%, and the total phosphorus removal rate of D001 resin without metal particles is less than 10% under the same conditions.

Embodiment 3

[0032] Other conditions are the same as in Example 1, except that the adsorbent used is a weakly acidic cation exchange resin-D113 resin. The obtained D113 resin loaded with nano metal oxide particles is red-brown round particles with metallic luster: D113 adsorbent loaded with catalytically active ferroferric oxide nanoparticles, and the metal ion loading amount is 1.0 mmol / g. Add the prepared adsorbent and hydrogen peroxide to 100 mL of phosphorus-containing wastewater (TP=1000, COD=6000) with a pH of 3 to 4, and the amount of nanoparticle adsorbent is 5% (v / v: adsorbent / Wastewater), the amount of hydrogen peroxide is 1% (v / v, hydrogen peroxide / waste water), stir at room temperature for 2 hours, filter, and test the treatment solution. The test result is: the organic phosphorus conversion rate is 20%, and the total phosphorus removal rate can reach 20 %, the total organic carbon removal rate is 20%, and the total phosphorus removal rate of D113 resin without metal particles ...

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Abstract

The invention discloses a preparation method of a catalytic activity nano particle loaded absorbent, which comprises the step of: with a plurality of kinds of absorbing agents as carriers, surface-loading metal oxide nano particles with catalytic activity to obtain the efficient catalytic activity absorbent in sewage treatment. The invention also discloses an absorbent prepared by using the method and application thereof in the posttreatment of organic phosphorus containing sewage. The absorbent achieves the purpose of synergism of catalysis and absorption through carrying out catalytic oxidization reaction on the surface-loaded nano particles, thereby overcoming the problems of low capacity and difficult desorption of the traditional physical absorbing process and easy loss of components of catalysts in the high-grade oxidization technology in the sewage treatment, remarkably improving efficiency of removing the absorbent, and reducing process links and steps. The absorbent has wide application prospect on the aspects of domestic sewage purification, chemical plant sewage treatment, catalytic degradation of toxic substances in the sewage, and the like.

Description

Technical field [0001] The invention belongs to the technical field of wastewater post-treatment, and specifically relates to a preparation method, product and application of a catalytically active nanoparticle adsorbent with a synergistic effect of adsorption and advanced catalysis in sewage treatment. Background technique [0002] The adsorption method for wastewater treatment has the unique advantages of good and stable water quality after adsorption treatment and no secondary pollution by the adsorbent, so it occupies an important position in sewage treatment. Traditional adsorbents include activated carbon, resin, bentonite, lignin, etc. They use the developed pore structure and the exchange and adsorption of characteristic functional groups to effectively separate the chemical substances in the wastewater, thereby achieving the purpose of purifying sewage. Due to the difference in composition and structure, the typical wastewater that can be treated by various adsorbents ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/30
Inventor 黄梅张敏东韦彦猆陈圣福梅荣武吴康跃
Owner ZHEJIANG UNIV
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