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A kind of preparation method and application of nano/micro iron oxide adsorption material

An adsorption material, iron oxide technology, applied in iron oxide, chemical instruments and methods, iron oxide/iron hydroxide and other directions, can solve the problems of strict reaction conditions, cumbersome synthesis process, secondary pollution, etc., and achieve stable chemical adsorption. , The operation process is simple and the production cost is low.

Active Publication Date: 2020-04-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment technologies of organic dyes and heavy metal ions include chemical precipitation, ion exchange and co-precipitation, etc., but these methods also have various deficiencies: either a large amount of precipitant is added to cause secondary pollution, or the cost is high.
However, this method has the disadvantages of cumbersome synthesis process, strict reaction conditions, and the use of various organic substances, and the obtained product only has adsorption effect on hexavalent chromium, which has certain limitations in the actual industrial wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a nano / micron iron oxide adsorption material. Firstly, an inorganic iron salt is dissolved in deionized water to obtain an aqueous solution of the inorganic iron salt, and then amines are added to the aqueous solution of the inorganic iron salt for mixing, and then transferred to put into the reaction kettle, carry out hydrothermal reaction, obtain the solid matter after the hydrothermal reaction, and wash the solid matter for at least 2 times, preferably 6 times or more, and then wash the solid matter at a certain temperature Drying is carried out to obtain nano / micron iron oxide adsorption materials; wherein, the order of adding amines to the aqueous solution of inorganic iron salts for mixing cannot be reversed, which is one of the invention points of the present invention, and it is necessary to control the addition of inorganic iron salts The addition of amine substances to the aqueous solution can ensure the final preparation of qualified nan...

Embodiment 2

[0027] An application of a nano / micro iron oxide adsorption material, the nano / micro iron oxide adsorption material is prepared by the method described in Example 1, and the nano / micro iron oxide adsorption material is applied to adsorb organic dyes and / or in water Or adsorb inorganic pollutants in water. The organic dyes include Congo red and methyl orange; the inorganic pollutants include heavy metal ion hexavalent chromium.

specific application example 1

[0029] 1. Utilize the method described in embodiment 1 to prepare Fe 2 o 3 Nano / micro material 0.1g.

[0030] 2. Preparation of organic dye solution: First weigh 0.1g of Congo red powder and put it into a 100ml volumetric flask to prepare a 1g / l Congo red solution, then dilute to obtain a 20mg / l Congo red solution.

[0031] 3. Treatment of organic dyes: Add 100ml of the above-mentioned 20mg / l Congo red solution into a 200ml beaker, and then accurately weigh 0.1g of Fe prepared by the above method 2 o 3 The adsorption material was added into a beaker, and stirred evenly at room temperature for adsorption. The removal rate was 85% when the reaction was carried out for 10 minutes, and the removal rate reached 99% after one hour of adsorption.

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Abstract

The invention mainly belongs to the technical field of material synthesis and application, and particularly relates to a preparation method and an application of a nano / micro iron oxide adsorbing material. The nano / micro iron oxide adsorbing material is used to adsorb organic dye and / or inorganic pollutants in water. The method comprises the steps of dissolving inorganic iron salt in deionized water to obtain an inorganic iron salt aqueous solution, adding an amine substance to the inorganic iron salt aqueous solution, performing mixing and uniform stirring, shifting the solution into a reaction kettle, performing a hydrothermal reaction to obtain solid, washing the solid, and drying the solid at a certain temperature to obtain the nano / micro iron oxide adsorbing material. The adsorbing material treats wastewater by an adsorbing method, so that operation is simple, convenient and easy; the adsorbing material has good adsorbability on the organic dye and inorganic heavy metal ions; and iron oxide is nontoxic and innocuous to an environment, and avoids secondary pollution.

Description

technical field [0001] The invention mainly belongs to the technical field of material synthesis and application, and specifically relates to a preparation method and application of a nano / micro iron oxide adsorption material; the nano / micro iron oxide adsorption material is applied to absorb organic dyes in water and / or absorb water of inorganic pollutants. Background technique [0002] With the rapid development of the economy, smelting, dyestuffs, electrolytic plating and other enterprises discharge a large amount of industrial wastewater containing organic dyes or heavy metal ions every year. The organic dyes or heavy metal ions in industrial wastewater pass through the soil, air, water, and even the food chain. The physical and mental health of human beings and the environmental water body produce great harm. Organic dyes and heavy metal ion pollutants are difficult to decompose and destroy, and cause serious environmental pollution, which has become a difficult point ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C01G49/06C02F1/28B82Y30/00C02F101/30C02F101/20C02F101/22
CPCB01J20/06B01J2220/4806B01J2220/4812B82Y30/00C01G49/06C02F1/281C02F2101/20C02F2101/22C02F2101/308
Inventor 于然波刘华王祖民陈晓煜
Owner UNIV OF SCI & TECH BEIJING