Porous iron-manganese composite material for efficiently fixing and removing antimony pollution as well as preparation method and application of porous iron-manganese composite material

A manganese composite material, porous iron technology, applied in water pollutants, chemical instruments and methods, other chemical processes, etc., can solve the problem of not discussing the removal effect of iron-manganese composite materials on trivalent antimony, lack of porous structure, etc. To achieve the effect of favorable removal, broad application prospects and large adsorption capacity

Active Publication Date: 2021-06-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there is currently a method for the preparation of iron-manganese composite oxides and its in-situ antimony removal (CN201910961787.0), the iron-manganese composites reported in the literature do not have a porous structure, and the specific surface area of ​​the adsorption material affects the adsorption. performance, so there is room for further improvement in the removal performance of pentavalent antimony
Moreover, the literature did not discuss the removal effect of iron-manganese composite materials on trivalent antimony.

Method used

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  • Porous iron-manganese composite material for efficiently fixing and removing antimony pollution as well as preparation method and application of porous iron-manganese composite material
  • Porous iron-manganese composite material for efficiently fixing and removing antimony pollution as well as preparation method and application of porous iron-manganese composite material
  • Porous iron-manganese composite material for efficiently fixing and removing antimony pollution as well as preparation method and application of porous iron-manganese composite material

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Experimental program
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Effect test

Embodiment 1

[0044] A method for preparing a porous iron-manganese composite material for efficiently fixing and removing antimony pollution, comprising the following steps:

[0045] (1) Accurately take by weighing 0.045mol potassium permanganate, 0.030mol manganese chloride and 0.075mol ferric chloride respectively, add respectively in 1000mL deionized water, obtain the potassium permanganate solution that concentration is 0.045mol / L after dissolving evenly, Concentration is the manganese chloride solution of 0.030mol / L and the ferric chloride solution that concentration is 0.075mol / L;

[0046] (2) After dropping the potassium permanganate solution into the manganese chloride solution at a rate of 1 mL / min, stir for 2 hours to obtain a suspension;

[0047] (3) Add ferric chloride solution to the suspension obtained in step (2) at a rate of 7.5 mL / min, and stir for 2 h to obtain a mixed solution;

[0048](4) Use ammonia water to adjust the pH of the mixed solution in step (3) to 7.5, age ...

Embodiment 2

[0051] A method for preparing a porous iron-manganese composite material for efficiently fixing and removing antimony pollution, comprising the following steps:

[0052] (1) Accurately take by weighing 0.015mol potassium permanganate, 0.010mol manganese chloride and 0.025mol ferric chloride respectively, add respectively in 1000mL deionized water, obtain the potassium permanganate solution that concentration is 0.015mol / L after dissolving evenly, Concentration is the manganese chloride solution of 0.010mol / L and the ferric chloride solution that concentration is 0.025mol / L;

[0053] (2) After dropping the potassium permanganate solution into the manganese chloride solution at a rate of 0.1 mL / min, stir for 1 hour to obtain a suspension;

[0054] (3) Add ferric chloride solution to the suspension obtained in step (2) at a rate of 5.0 mL / min, and stir for 1 h to obtain a mixed solution;

[0055] (4) Use ammonia water to adjust the pH of the mixed solution in step (3) to 7.0, ag...

Embodiment 3

[0058] A method for preparing a porous iron-manganese composite material for efficiently fixing and removing antimony pollution, comprising the following steps:

[0059] (1) Accurately take by weighing 0.090mol potassium permanganate, 0.060mol manganese chloride and 0.150mol ferric chloride respectively, add respectively into 1000mL deionized water, obtain the potassium permanganate solution that concentration is 0.090mol / L after dissolving evenly, Concentration is the manganese chloride solution of 0.060mol / L and the ferric chloride solution that concentration is 0.150mol / L;

[0060] (2) After the potassium permanganate solution is dripped into the manganese chloride solution at a rate of 5 mL / min, stir for 3 hours to obtain a suspension;

[0061] (3) Add ferric chloride solution to the suspension obtained in step (2) at a dropping rate of 10mL / min, and stir for 3h to obtain a mixed solution;

[0062] (4) Use ammonia water to adjust the pH of the mixed solution in step (3) t...

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Abstract

The invention belongs to the technical field of adsorption materials, and discloses a porous iron-manganese composite material for efficiently fixing and removing antimony pollution as well as a preparation method and application of the porous iron-manganese composite material. The method comprises the following steps: respectively preparing permanganate, manganese salt and ferric salt into a permanganate solution, a manganese salt solution and a ferric salt solution; dropwise adding the permanganate solution into the manganese salt solution, and stirring to obtain a suspension; adding an iron salt solution into the suspension, and stirring to obtain a mixed solution; and adjusting the pH value to 6.5-8.5, carrying out aging treatment, centrifuging to obtain precipitate, washing, drying, grinding and sieving to obtain the porous iron-manganese composite material for efficiently fixing and removing antimony pollution The material has the characteristics of being porous, high in specific surface area and stable in adsorption; and the porous iron-manganese composite material for efficiently fixing and removing antimony pollution can be used for treating trivalent antimony and pentavalent antimony pollution, and is high in removal rate and high in adsorption capacity. The method is simple, mild in reaction condition and low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a porous iron-manganese composite material for efficiently fixing and removing antimony pollution, a preparation method and application thereof. Background technique [0002] Natural antimony mainly exists in the form of ores, and the main valence states are Sb(III) and Sb(V). The global antimony reserves are 4-5 million tons, while China's antimony reserves rank first in the world. As a major producer of antimony, China's output accounts for about 79.6% of the world's total. In recent years, the unreasonable mining of antimony mines and the irregular use of antimony-containing products have led to a sharp increase in the content of antimony in China's soil, water and atmosphere. Among them, the content of antimony in the environment of Hunan, Guizhou and Guangxi rich in antimony ore far exceeds the background value. The concentration of Sb in my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/06B01J20/28054C02F1/281C02F2101/20
Inventor 吴平霄陈梅青党志
Owner SOUTH CHINA UNIV OF TECH
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