Method for preparing composite assembled object of magnetic ferriferous oxide/ molecular sieve of Nano zeolite

A magnetic iron oxide, nano-zeolite technology, applied in the direction of silicon compound, crystalline aluminosilicate zeolite, inorganic chemistry, etc., can solve the problems of high manufacturing cost of adsorption materials, low adsorption efficiency, large amount of introduction, etc., and achieve a simple regeneration process. Easy operation, excellent adsorption performance, stable properties

Inactive Publication Date: 2008-06-04
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it should be pointed out that using materials such as iron oxide ore tailings as adsorbents can easily introduce a large number of new pollution sources such as metal heteroions into the water body, and there is a potential problem of secondary pollution to the water body.
[0005] But so far, the existing related adsorption separation technologies are still widespread: the adsorption efficiency is low; the manufacturing cost of the adsorption material is high, the related adsorption removal process, and the operation steps are cumbersome and other problems, so the typical pollutants such as phosphorus and arsenic mentioned above The environmental water system purification problem caused by it has not been effectively solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] ① Choose self-made BEAT nano zeolite material 1g.

[0024] ②Add 0.5mol / L FeCl 3 .6H 2 O and 0.3mol / L FeCl 2 .4H 2 A total of 100 mL of O was stirred and refluxed in a 60°C oil bath for 12 hours, and filtered.

[0025] ③In a water bath at 60°C, under the protection of an inert nitrogen atmosphere, drop 50mL of 25% concentrated ammonia water on the filter cake at a rate of 2 drops per second and stir rapidly for one hour to form a dark brown substance, then wash with water until nearly neutral, and dry at 60°C 5 hours.

[0026] ④Put 0.05 g of the magnetic iron oxide-modified nano-zeolite molecular sieve composite assembly material prepared in the above example into a phosphorus-containing simulated aqueous solution with a concentration of 5 mL of 50 μg / mL (total P) (analytical pure potassium dihydrogen phosphate KH2PO4 is formulated into a standard solution of 1000mg / L (calculated as P), and the pH value is adjusted by 1mol / L HCl or NaOH solution (diluted to a corres...

Embodiment 2

[0029] ① Choose self-made BEAT nano zeolite material 1g.

[0030] ②Add 0.5mol / L FeCl 3 .6H 2O and 0.25mol / L FeCl 2 .4H 2 A total of 100 mL of O was stirred and refluxed in a 60°C oil bath for 12 hours, and filtered.

[0031] ③In a water bath at 60°C, under the protection of an inert nitrogen atmosphere, drop 50mL of 25% concentrated ammonia water on the filter cake at a rate of 2 drops per second and stir rapidly for one hour to form a dark brown substance, then wash with water until nearly neutral, and dry at 60°C 5 hours.

[0032] ④Put 0.05 g of the magnetic iron oxide-modified nano-zeolite molecular sieve composite assembly material prepared in the above example into 5 mL of 50 μg / mL (total P) phosphorus-containing simulated aqueous solution to adjust the pH value of the aqueous solution system 3-5, adsorption at room temperature for 12 hours, the adsorption efficiency is 64%.

[0033] Put 0.05 g of the magnetic iron oxide-modified nano-zeolite molecular sieve composi...

Embodiment 3

[0035] ① Choose self-made BEAT nano zeolite material 1g.

[0036] ②Add 0.5mol / L FeCl 3 .6H 2 O and 0.33mol / L FeCl 2 .4H 2 A total of 100 mL of O was stirred and refluxed in a 60°C oil bath for 12 hours, and filtered.

[0037] ③In a 60°C water bath, under the protection of an inert nitrogen atmosphere, drop 50mL of 25% concentrated ammonia water on the filter cake at a rate of 2 drops per second and stir rapidly for one hour to form a dark brown substance. Let dry for 5 hours.

[0038] ④Put 0.05 g of the magnetic iron oxide-modified nano-zeolite molecular sieve composite assembly material prepared in the above example into 5 mL of 50 μg / mL (total P) phosphorus-containing simulated aqueous solution to adjust the pH value of the aqueous solution system 3-5, adsorption at room temperature for 12 hours, the adsorption efficiency is 62%

[0039] Put 0.05 g of the magnetic iron oxide-modified nano-zeolite molecular sieve composite assembly material prepared in the above example...

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PUM

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Abstract

This invention relates to a method for preparing magnetic iron oxide / nanoscale zeolite molecular sieve composite. The method comprises: (1) selecting nanoscale zeolite crystal material; (2) introducing Fe2+ / Fe3+ as active reaction sites through ion exchange under the action of electrostatic attraction; (3) dropping 25% ammonia solution for reaction of the active sites in an alkaline medium, washing with water and drying; (4) removing phosphate ions and arsenate ions from water by using a dynamic adsorption apparatus. The method has such advantages as low cost, simple operation and high adsorption rate, and can be widely used for water purification.

Description

technical field [0001] The invention relates to a preparation method for water body purification used in the technical field of environmental protection, in particular to a preparation method for a nano-zeolite molecular sieve composite assembly modified by magnetic iron oxides. Background technique [0002] The eutrophication of the water body will lead to serious consequences such as the proliferation of plants and algae in the water, the decrease of oxygen content, and the deterioration of water quality. Phosphorus plays a special role in the eutrophication of water bodies. At present, the problem of inorganic phosphorus pollution in seawater in Taizhou and other southeast coastal areas of our country has attracted great attention from relevant governments. The extensive use of phosphorus-containing washing powder and phosphorus-nitrogen fertilizers is the main "killer" that causes phosphorus pollution in water bodies. Because phosphorus is an important element needed f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16C01B39/06C02F1/28
Inventor 徐芳张蔚霞黄珏路佳蔡伟民
Owner SHANGHAI JIAOTONG UNIV
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