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Antimony pollution site soil stabilization repair agent and preparation method thereof

A repairing agent and stabilization technology, applied in the field of antimony-contaminated soil stabilization repairing agent and its preparation, to achieve the effect of high safety, wide range of sources, and low cost

Active Publication Date: 2018-05-22
HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the field of remediation agents for antimony-contaminated soil, there are no related patents and products in China

Method used

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  • Antimony pollution site soil stabilization repair agent and preparation method thereof
  • Antimony pollution site soil stabilization repair agent and preparation method thereof
  • Antimony pollution site soil stabilization repair agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, the present invention includes a formula, the weight percentage of raw materials of the formula is: ferrous sulfate 20%-50%, can have better co-precipitation and adsorption effect, reduced iron powder 5%-20%, can have more Good reduction performance can reduce antimony in the soil to a low-toxic and difficult-to-migrate form. Bentonite 20%-50% can have better adsorption capacity and ion exchange capacity, which can improve the stabilization effect of the present invention. Calcium oxide 10%-30%, while stabilizing antimony, it will not affect the leaching of other heavy metal elements, and 5%-20% calcium carbonate, which can have good pH buffering ability and good long-term effect.

[0028] The preparation method of the present invention comprises the following steps:

[0029] (1) raw material calcium oxide, bentonite, calcium carbonate, ferrous sulfate, reduced iron powder are added in the dry type ball mill in proportion, so that grind and mix;

[0030] ...

Embodiment 2

[0032] Embodiment 2, the present invention includes a formula, and the weight percentage of the raw materials of the formula is: 30% of ferrous sulfate, which can have better co-precipitation and adsorption effect, and 5% of reduced iron powder, which can have better reduction performance and can Restore antimony in the soil to a low-toxic and difficult-to-migrate form, 40% bentonite, can have better adsorption capacity and ion exchange capacity, and can improve the stabilization effect of the present invention, 15% calcium oxide, can stabilize antimony At the same time, it will not affect the leaching of other heavy metal elements, and the calcium carbonate content is 10%, which can have a good pH buffering capacity and a good long-term effect.

[0033] The preparation method of the present invention comprises the following steps:

[0034] (1) raw material calcium oxide, bentonite, calcium carbonate, ferrous sulfate, reduced iron powder are added in the dry type ball mill in ...

Embodiment 3

[0047]Embodiment 3, the present invention includes a formula, and the weight percentage of raw materials of the formula is: 30% of ferrous sulfate, which can have better coprecipitation and adsorption effect, and 5% of reduced iron powder, which can have better reduction performance and can Restore antimony in the soil to a low-toxic and difficult-to-migrate form, 40% bentonite, can have better adsorption capacity and ion exchange capacity, and can improve the stabilization effect of the present invention, 10% calcium oxide, in the stabilization of antimony At the same time, it will not affect the leaching of other heavy metal elements, and the calcium carbonate content is 15%, which can have a good pH buffering capacity and a good long-term effect.

[0048] The preparation method of the present invention comprises the following steps:

[0049] (1) raw material calcium oxide, bentonite, calcium carbonate, ferrous sulfate, reduced iron powder are added in the dry type ball mill...

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Abstract

The invention discloses an antimony pollution site soil stabilization repair agent and a preparation method thereof. A formula of the antimony pollution site soil stabilization repair agent is prepared from the raw materials in weight percentage: 20% to 50% of ferrous sulfate, 5% to 20% of reduced iron powder, 20% to 50% of bentonite, 10% to 30% of calcium oxide and 5% to 20% of calcium carbonate.The preparation method comprises the steps: (1) adding the raw materials of calcium oxide, the bentonite, the calcium carbonate, the ferrous sulfate and the reduced iron powder into a dry type ball mill according to proportion; (2) vacuumizing the dry type ball mill or inflating inert gas into the dry type ball mill; (3) under the vacuum or the inert gas condition, mixing and ball milling for 5 to 10min to obtain the antimony pollution soil repair agent. The antimony pollution site soil stabilization repair agent disclosed by the invention has the advantages of good stability, quick effect, good effect, wide raw material sources, lower cost, simpleness in use and operation, high safety and the like.

Description

technical field [0001] The invention relates to the field of contaminated soil remediation, in particular to a soil stabilization and remediation agent for antimony-contaminated sites and a preparation method thereof. Background technique [0002] Antimony is a global pollutant and one of the most concerned toxic heavy metals in the world. It has been listed as a priority pollutant by the US Environmental Protection Agency (USEPA), and is also listed as a hazardous waste by the European Union (EU) Basel Convention. Antimony has been proven to be toxic and carcinogenic to humans and organisms, and can cause diseases in the liver, skin, respiratory system and cardiovascular system, and the incubation period of antimony poisoning is long. [0003] Antimony in the environment mainly comes from rock weathering, antimony mining and smelting, and the widespread use of antimony compounds. As the country with the largest antimony production in the world, China produces 80% of the wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/08C09K109/00
CPCC09K17/08C09K2109/00
Inventor 张剑锋魏勇红冯源熊伟刘琳
Owner HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD