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A solidification and stabilization material for controlling arsenic pollution and its preparation method

A technology of arsenic pollution and mechanical activation, applied in the field of soil remediation, can solve the problems of low practicability, difficulty in production and application, and high price, and achieve the effect of simple manufacture, obvious stabilization effect, and low price

Active Publication Date: 2020-11-24
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many adsorption materials for As in soil pollution and water pollution, and most of them are synthetic materials, which are expensive, not practical, and not easy to achieve large-scale production and application.

Method used

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  • A solidification and stabilization material for controlling arsenic pollution and its preparation method
  • A solidification and stabilization material for controlling arsenic pollution and its preparation method
  • A solidification and stabilization material for controlling arsenic pollution and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A curing and stabilizing material for controlling arsenic pollution, comprising mechanically activated limonite with an average particle size of 0.2 μm obtained through mechanical activation. Specifically, when the average particle size of the mechanically activated limonite is 0.2 μm, the mechanically activated limonite particles with a particle size of less than 1 μm account for 95% of the total amount (by mass), and the content of Fe element is 63.8 %, containing goethite phase components, uniform particle size and low crystallinity, at this time, the adsorption force on As is the best. Its adsorption capacity for As(V) can reach 8.26-8.34mg·g -1 , the adsorption capacity for As(III) can reach 8.73-9.14mg·g -1 .

Embodiment 2

[0032] A method for preparing a solidified and stabilized material for controlling arsenic pollution, comprising the steps of:

[0033] Step 1: selecting natural limonite with an iron content of 60-70%, smashing it and coarsely grinding it into powdery limonite with larger particle size;

[0034] Step 2: sieving the powdery limonite to obtain fine powder limonite;

[0035] Step 3: Put the fine powder limonite in the Miqi YXQM-2L planetary ball mill for mechanical activation. The ball mill cylinder and balls are made of agate, and the balls are small balls. The ball-to-material ratio is set to 10:1 , the revolution speed of the ball mill is set to 320r / min, and the rotation speed is set to 640r / min;

[0036] And add dehydrated alcohol in mechanical activation process as dispersion medium, the solid-liquid ratio of its fine powder limonite and dehydrated alcohol is 5:4, and solid-liquid ratio unit is g:mL; Fine powder limonite is in Perform mechanical activation in a ball mill...

Embodiment 3

[0040] A method for preparing a solidified and stabilized material for controlling arsenic pollution, comprising the steps of:

[0041] Step 1: selecting natural limonite with an iron content of 60-70%, smashing it and coarsely grinding it into powdery limonite with larger particle size;

[0042] Step 2: passing the powdery limonite through a 200-mesh sieve to obtain fine powder limonite;

[0043] Step 3: Place the fine powder limonite in the Miqi YXQM-2L planetary ball mill for mechanical activation. The ball mill cylinder and balls are made of agate, and the balls are small balls. The ball-to-material ratio is set to 10:1 , the revolution speed of the ball mill is set to 320r / min, and the rotation speed is set to 640r / min;

[0044] And in mechanical activation process, add dehydrated alcohol as dispersion medium, the solid-liquid ratio of described fine powder limonite and described dehydrated alcohol is 5:4, and solid-liquid ratio unit is g:mL; Fine powder brown The iron ...

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Abstract

The invention discloses a curing stabilizing material for treating arsenic pollution, and a preparation method thereof, wherein the material comprises mechanically activated limonite obtained throughmechanical activation and having an average particle size of about 0.2 [mu]m. The preparation method comprises: 1, carrying out breaking or coarse grinding on a certain amount of natural limonite to obtain powdery limonite with relatively large granularity; 2, screening the powdery limonite to obtain fine powder limonite; and 3, placing the fine powder limonite into a ball mill, carrying out mechanical activation, and adding absolute ethyl alcohol as a dispersion medium during mechanical activation so as to obtain the mechanically activated limonite having an average particle size of about 0.2[mu]m.

Description

technical field [0001] The invention relates to a solidification and stabilization material for controlling arsenic pollution and a preparation method thereof, belonging to the technical field of soil remediation. Background technique [0002] Arsenic (As) is a toxic non-metallic element, which is often used in the production of pesticides and alloys. It has carcinogenic, teratogenic, and mutagenic effects, and is widely present in soil and groundwater. It is currently one of the most common pollutants that pose the most serious hazards to public health. According to the official announcement of the World Health Organization, at least 50 million people in the world are facing the threat of endemic As poisoning, such as Bangladesh, China, the United States, India, Chile, Japan, Argentina, Canada, etc., including Asian countries including China As is the most serious threat. [0003] The increase of soil As concentration will affect the normal function of the ecosystem and p...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/28B01J20/30B09C1/08
CPCB01J20/06B01J20/28057B09C1/08
Inventor 阎秀兰邵金秋冯桐桐杨泽恩
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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