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A kind of iron-aluminum composite material that adsorbs trivalent arsenic and its application

A composite material, a technology for trivalent arsenic, which is applied in the field of adsorption of trivalent arsenic in water to achieve the effects of strong operability, industrialized production and simple preparation method

Active Publication Date: 2018-04-17
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively few domestic studies on the adsorption of trivalent arsenic on aluminum as an adsorbent.

Method used

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  • A kind of iron-aluminum composite material that adsorbs trivalent arsenic and its application
  • A kind of iron-aluminum composite material that adsorbs trivalent arsenic and its application
  • A kind of iron-aluminum composite material that adsorbs trivalent arsenic and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This example relates to an iron-aluminum composite material that adsorbs trivalent arsenic in water, which is prepared by the following method:

[0042] Calcinate aluminum oxide at 1000°C for 2 hours and pass through a 100-mesh sieve;

[0043] Dissolve ferrous sulfate heptahydrate in water, and slightly heat to make it a light green solution;

[0044] 1) To the ferrous sulfate heptahydrate solution, the ratio of the amount of ferrous iron to hydrogen peroxide is 1:1 to add a hydrogen peroxide solution with a concentration of 30%, slowly adding and constantly oscillating during the addition, after the reaction A mixed solution is obtained, and the pH of the mixed solution is adjusted to 6;

[0045] 2) adding the calcined aluminum oxide to the mixed solution according to the ratio of the amount of iron and aluminum to 1:0.2 to obtain the mixed solution of iron and aluminum;

[0046] 3) Place the iron-aluminum mixed solution on a constant temperature oscillator at 25°C a...

Embodiment 2

[0048] This example relates to an iron-aluminum composite material that adsorbs trivalent arsenic in water, which is prepared by the following method:

[0049] Calcinate aluminum oxide at 1000°C for 2 hours and pass through a 100-mesh sieve;

[0050] Dissolve ferrous sulfate heptahydrate in water, and slightly heat to make it a light green solution;

[0051] 1) To the ferrous sulfate heptahydrate solution, the ratio of the amount of ferrous iron to hydrogen peroxide is 1:1 to add a hydrogen peroxide solution with a concentration of 30%, slowly adding and constantly oscillating during the addition, after the reaction A mixed solution is obtained, and the pH of the mixed solution is adjusted to 6;

[0052]2) adding calcined aluminum oxide to the mixed solution according to the ratio of the amount of iron and aluminum to 1:0.5 to obtain the mixed solution of iron and aluminum;

[0053] 3) Put the mixed iron and aluminum on a constant temperature oscillator at 25°C and 150r / min ...

Embodiment 3

[0055] This example relates to an iron-aluminum composite material that adsorbs trivalent arsenic in water, which is prepared by the following method:

[0056] Calcinate aluminum oxide at 1000°C for 2 hours and pass through a 100-mesh sieve;

[0057] Dissolve ferrous sulfate heptahydrate in water, and slightly heat to make it a light green solution;

[0058] 1) To the ferrous sulfate heptahydrate solution, the ratio of the amount of ferrous iron to hydrogen peroxide is 1:1 to add a hydrogen peroxide solution with a concentration of 30%, slowly adding and constantly oscillating during the addition, after the reaction A mixed solution is obtained, and the pH of the mixed solution is adjusted to 6;

[0059] 2) Add calcined aluminum oxide to the mixed solution according to the ratio of the amount of iron and aluminum to 1:0.8 to obtain the mixed solution of iron and aluminum;

[0060] 3) Put the mixed iron and aluminum on a constant temperature oscillator at 25°C and 150r / min to...

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Abstract

The invention relates to an iron and aluminum composite capable of adsorbing trivalent arsenic. The iron and aluminum composite is prepared through the following method including the steps that firstly, a hydrogen dioxide solution is added into a ferrous sulfate heptahydrate solution at the mass ratio of ferrous iron to hydrogen dioxide being 1:(0.8-1.2), and a mixed solution is obtained after a reaction; secondly, roasted aluminum oxide is added into the mixed solution at the mass ratio of iron to aluminum being 1:(0.15-1.5), and an iron and aluminum mixed solution is obtained; thirdly, the iron and aluminum mixed solution is subjected to constant-temperature oscillation, drying and grinding, and then the iron and aluminum composite is obtained, wherein the pH of the mixed solution or the iron and aluminum mixed solution is regulated to range from 5.5 to 6.5 in the preparing process. Compared with a material prepared through a biological method, the preparing method is simple, high in operability and more beneficial to industrial production.

Description

technical field [0001] The invention relates to the field of adsorption of trivalent arsenic in water, in particular to an iron-aluminum composite material. Background technique [0002] As the first type of carcinogen, arsenic is not only a harmful trace element, but also has different degrees of harm to various systems and organs of the human body. Trivalent arsenic is more toxic and more difficult to handle than pentavalent arsenic. Common arsenic treatment methods in water generally include precipitation, adsorption, oxidation, ion exchange, and biochemical methods. Compared with other methods, the adsorption method has attracted widespread attention due to its simplicity, low cost, and suitability for treating arsenic-containing wastewater with large water volume and low concentration. At present, the adsorption materials for arsenic removal mainly include metal minerals, industrial and agricultural wastes, resin adsorbents, carbon adsorbents, biological adsorbents an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/28C02F1/28C02F101/10
CPCB01J20/0229B01J20/0248B01J20/28014B01J2220/4806C02F1/281C02F2101/103
Inventor 罗琳孟成奇张嘉超魏建宏周耀宇高军张凤凤
Owner HUNAN AGRICULTURAL UNIV