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Novel resene-based nanocomposite and preparation method, regeneration method and application thereof

A nano-composite material and resin oxidation technology, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve problems such as difficulty in regeneration, poor removal of trivalent arsenic, etc., and achieve the effect of avoiding covering and adverse effects

Active Publication Date: 2017-06-30
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that nano-Fe(III), Zr(IV) metal oxides are difficult to deeply remove trivalent arsenic and Fe-Mn bimetallic materials under non-acidic conditions have poor removal effect and difficult regeneration of trivalent arsenic, the purpose of the present invention The aim is to provide a new type of oxidized resin-based nano-composite material with both oxidation and adsorption functions, its preparation method, regeneration method and application, and to achieve ultra-deep purification of trace trivalent arsenic through neighborhood oxidation-adsorption. In addition, the composite material It also has the characteristics of high mechanical strength, easy operation, and repeatable regeneration.

Method used

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  • Novel resene-based nanocomposite and preparation method, regeneration method and application thereof
  • Novel resene-based nanocomposite and preparation method, regeneration method and application thereof

Examples

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Effect test

Embodiment 1

[0041] A kind of preparation method of novel oxidized resin-based nanocomposite material, its implementation steps are as follows (preparation process is as follows: figure 2 shown):

[0042] (1) Add 1.02g of 5,5'-dimethylhydantoin and 0.45g of KOH to 20mL of absolute ethanol, boil and reflux for 6h, and dry the obtained white potassium salt;

[0043] (2) Weigh 1.0 g of the white potassium salt obtained in step (1), add it to 20 mL of N, N'-dimethylformamide (DMF) to dissolve it, add 2.0 g of chloromethylated styrene-di Vinylbenzene copolymerized spheres, heated at 60°C for 12h;

[0044] (3) Add the product obtained in step (2) to 20mL containing 0.9M FeCl 3 In the solution, take out after stirring reaction at room temperature for 24h;

[0045] (4) Slowly add the product obtained in step (3) into 20 mL of 10% NaOH solution, stir and react at room temperature for 6 hours, then remove and wash until neutral;

[0046] (5) Add the product obtained in step (4) to 20mL of 8% Na...

Embodiment 2

[0049] A preparation method of an oxidized resin-based nanocomposite material, its implementation steps are similar to those in Example 1, only the boiling reflux time in step (1) is changed to 3h, the heating temperature in step (2) is changed to 50°C, and the reaction time is changed to For 26h, FeCl in step (3) 3 Change the concentration of 1.5M into 1.5M, change the reaction time into 6h, change the reaction time into 3h in the step (4), adjust the pH of the solution to 4 by 0.1mmol / LHCl in the step (5), change the reaction temperature into 50°C, and change the reaction time into for 12h.

[0050] The active chlorine content of the composite material obtained in this embodiment is 1.3mmol / g, the iron loading is 12%, and the Fe element is evenly distributed; the specific surface area of ​​the composite material is 60m 2 / g, the distribution of nanometer hydrated iron (III) oxide particles is 5-100nm.

Embodiment 3

[0052] A preparation method of an oxidized resin-based nano-composite material, the implementation steps of which are similar to those in Example 1, only changing the boiling reflux time to 12 hours in step (1), changing the heating temperature to 90°C and changing the reaction time to For 20h, FeCl in step (3) 3 The concentration of the solution is changed to 0.1M, the reaction time is changed to 12h, the reaction time is changed to 12h in the step (4), the solution pH is adjusted to 6 by 0.1mmol / LHCl in the step (5), the reaction temperature is changed to 90°C, and the reaction time is changed for 36h.

[0053] The composite material obtained in this example is a spherical particle with a diameter of 0.8 mm. According to "2.1 Iodine Method" in "Standard Test Method for Drinking Water: Disinfectant Index" (GB / T 5750.11-2006), the active chlorine content of the composite material is measured to be 1.5mmol / g; The amount of iron loading measured by flame atomic absorption meth...

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Abstract

The invention discloses a novel resene-based nanocomposite and a preparation method, a regeneration method and an application thereof, which belongs to the field of an environment functional material. The skeleton of the composite material is macroporous styrene-divinylbenzen copolymerization sphere, active chlorine is subjected to covalent combination on the skeleton, and the nano hydration iron oxide or nano hydration zirconia particles are uniformly distributed in the apertures. The specific surface area of the nanocomposite is 10-80 m<2> / g, the active chlorinity is 0.2-1.5 mmol / g, the mass fraction of Fe / Zr element is 5-25%, and the size of the nano particle is 5-100 nm. Through the steps of annular amide modification-in-situ deposition-chlorination, integration of oxidation function and adsorption function is realized, neighborhood oxidation-adsorption of trivalent arsenic is realized, the resene-based nanocomposite has the advantages of high oxidation capacity, high adsorption selectivity, protrude deep purification performance for trivalent arsenic, and stable regeneration, and can effectively increase the deep processing level of trivalent arsenic in underground water.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, and more specifically relates to an oxidized resin-based nanocomposite material for efficiently removing arsenic in water, a preparation method, a regeneration method and application. Background technique [0002] Arsenic pollution in water bodies is widespread all over the world, and it is one of the major hidden dangers threatening human water safety. Due to the high toxicity of arsenic, both the World Health Organization and my country have stipulated that the safe concentration in drinking water is below 10 μg / L. There are two main types of arsenic in natural water, namely trivalent arsenic and pentavalent arsenic. Arsenic pollution in water is mainly caused by geological factors. It is mostly distributed in reducing environments such as groundwater, and trivalent arsenic is often the dominant form. Studies have shown that the toxicity of trivalent arsenic is much greater t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28C02F101/10
CPCC02F1/285B01J20/26B01J20/3475C02F2101/103
Inventor 潘丙才张孝林吴梦非蒋朝董浩李红超
Owner NANJING UNIV
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