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Novel catalysis-adsorption material as well as preparation method and application thereof

An adsorption material, a new type of technology, applied in chemical instruments and methods, adsorption water/sewage treatment, special compound water treatment, etc., can solve the problems that cannot overcome the agglomeration phenomenon at the same time, strengthen the ability of catalytic oxidation of organic matter and the ability of adsorption of heavy metals, etc., Achieve excellent thermal stability, enhanced ability to catalyze and oxidize organic matter, and high surface activity

Inactive Publication Date: 2020-06-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects and deficiencies that the existing nano-zero-valent iron (nZVI) materials cannot simultaneously overcome the agglomeration phenomenon and strengthen the ability to catalyze and oxidize organic matter and the ability to absorb heavy metals, and provide a new type of catalytic-adsorption material preparation method

Method used

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  • Novel catalysis-adsorption material as well as preparation method and application thereof
  • Novel catalysis-adsorption material as well as preparation method and application thereof
  • Novel catalysis-adsorption material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A preparation method of a novel catalyst-adsorbing material, comprising the steps of:

[0048] Configure 100mL with a concentration of 0.1mol / L FeCl 3 ·6H 2 O solution and 100 mL of 0.4 mol / L NaBH 4 Solution (preparation and use now);

[0049] Weigh 1.867g γ-Al 2 o 3 , after fully grinding for 10min (γ-Al 2 o 3 The particle size is 4μm) added to 100ml of 0.1mol / L FeCl 3 ·6H 2 Into the O solution, pass nitrogen gas, fully stir for 30min under mechanical stirring at a speed of 240r / min, then add 0.4mol / L NaBH dropwise 4 Solution (V FeCl3·6H2O :V NaBH4 =1:1) slow first and then fast, the dropping rate is (first) 1~2mL / min unit, (last) 3~4mL / min after the reaction is completed, first wash with deionized water twice, and then use absolute ethanol After washing twice, vacuum-drying at 40°C, the composite material can be obtained.

[0050] Among them, γ-Al 2 o 3 and Fe 3+ The ratio of the amount of ion to substance is 1:10;

[0051] Fe 3+ Ions and NaBH 4 The ...

Embodiment 2

[0054] Example 2 Adsorption of heavy metals and organic matter experiment

[0055] The experimental conditions are: pipette 200mL 280mg / L sodium arsenate and roxarsone solutions into 250ml beakers respectively, then add 200mg composite materials respectively, mechanically stir at pH 6.5, reaction temperature 25°C, 240r / min speed, every Samples are taken at specific time intervals and filtered with a disposable filter head for testing.

[0056] Such as figure 1 As shown, the composite material has an adsorption capacity of 103 mg / g and 197 mg / g for sodium arsenate and roxarsone solutions in 60 minutes, indicating that the material has a strong adsorption capacity for organic matter and heavy metals.

[0057] The adsorption of sodium arsenate reached equilibrium in 500 minutes, and its saturated adsorption capacity was 223 mg / g, while the adsorption of roxarsone reached equilibrium in 300 minutes, and its saturated adsorption capacity was 109 mg / g.

Embodiment 3

[0058] Example 3 Effect of pH value on catalysis-adsorption of roxarsone

[0059] The experimental conditions are: pipette 4 parts of 200mL 200mg / L roxarsone solution into 250ml beakers, adjust the pH to 3, 5, 7, 8.5, add 200mg of composite materials, and then add 1.1ml of 30% hydrogen peroxide solution , under the condition of 25°C, with mechanical stirring at 240r / min, samples were taken at specific time intervals, and filtered with a disposable filter head for testing.

[0060] Test results such as figure 2 and 3 As shown, when the pH is 3.21, the TOC (total organic carbon) and arsenic removal rates are the highest, respectively 52.7% and 63.3%, indicating that the removal of roxarsone is greatly affected by pH.

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Abstract

The invention discloses a novel catalysis-adsorption material as well as a preparation method and an application thereof. The preparation method comprises the following steps: adding gamma-Al2O3 intoa Fe <3+> ion solution, introducing inert gas, uniformly stirring, adding a NaBH4 solution, reducing Fe<3+> into nano zero-valent iron, washing and drying to obtain the novel catalytic-adsorption material. According to the preparation method disclosed by the invention, the nZVI is uniformly attached to the surface of the activated aluminum oxide and in a pore structure of the activated aluminum oxide, so that the nZVI is in a stable high-surface-energy state, heavy metals are adsorbed and removed while organic matters are catalytically oxidized, and the adsorption capacity for arsenate is 223mg / g; when the concentration of roxarsone is lower than 100 mg / L, the removal rates of TOC and arsenic are both as high as 99.9%, the emission concentration of arsenic in the final solution is lower than 40 ppb in the environment, and the material further has the magnetism of zero-valent iron, is easy to separate from the reaction solution, high in treatment efficiency and low in production cost and does not cause secondary pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of adsorption material preparation, and more specifically, relates to a novel catalyst-adsorption material and its preparation method and application. Background technique [0002] In recent years, with the rapid development of large-scale and intensive livestock breeding industry, livestock and poultry breeding pollution has become the third largest pollution source after industrial pollution and domestic pollution. Livestock pollution contains a large amount of nutrients nitrogen and phosphorus, which is one of the most important sources of water eutrophication. On the other hand, it also contains heavy metals and antibiotics, both of which are mainly derived from veterinary drugs and feed additives. In the common aquaculture wastewater treatment process, although heavy metals are easily adsorbed with organic matter such as SS, some heavy metals can be removed through the treatment and disposal of SS, but ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/72C02F101/20C02F101/30
CPCC02F1/281C02F1/722C02F1/725C02F2101/103C02F2101/20C02F2101/30C02F2305/026
Inventor 谢武明毕小林
Owner GUANGDONG UNIV OF TECH
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