A kind of heavy metal polluted soil remediation material, preparation method and use

A technology for polluted soil and remediation materials, which is applied to the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of limited application scope and cumbersome preparation process, and achieves low cost, simple calcination process, and reduced Effects of Energy Consumption and Greenhouse Gas Emissions

Active Publication Date: 2020-09-22
NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also has shortcomings such as limited scope of application and cumbersome preparation process.

Method used

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  • A kind of heavy metal polluted soil remediation material, preparation method and use
  • A kind of heavy metal polluted soil remediation material, preparation method and use
  • A kind of heavy metal polluted soil remediation material, preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The source of dolomite powder is the DRB20 dolomite powder of UK IMERYS Minerals Ltd's (Imerys Minerals Ltd's). The calcination equipment is a general laboratory high-temperature quenching furnace with a maximum temperature of at least 1300 °C; the blast furnace slag powder is from Hanson, England, and the main chemical composition and physical properties of this blast furnace slag powder are shown in Table 2. The heavy metal-contaminated soil comes from a heavy metal-contaminated site in Castleford, Yorkshire, UK. The original concentration range of the main heavy metal pollutants is shown in Table 3.

[0042] Table 2 Main chemical composition (mass percentage) and physical properties of Hanson blast furnace slag powder

[0043]

[0044] Table 3 Concentration of heavy metal pollutants in polluted sites (unit: mg / kg)

[0045]

[0046] Preparation of restoration materials:

[0047] Weigh an appropriate amount of the above-mentioned DRB20 dolomite powder and place...

Embodiment 2

[0052] It is basically the same as in Example 1, except that the temperature of the muffle furnace is raised to 1000° C. to obtain light-burned dolomite 2#. After determination, 2# contains magnesium oxide, calcium oxide and a small amount of calcium carbonate. Due to the lower calcination temperature in the preparation of 1#, the activity of magnesium oxide in 1# is higher than that of 2#.

Embodiment 3

[0054] It is basically the same as Example 1, except that the mass ratio of lightly burned dolomite and blast furnace slag is 1:9, and this ratio is only used as an example in the examples. .

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Abstract

The invention discloses a heavy metal contaminated soil remediation material, a preparation method and an application. The remediation material contains lightly burnt dolomite powder and blast furnace slag powder. The heavy metal contaminated soil remediation material is prepared from calcined dolomite and the blast furnace slag powder through mixing. The remediation material is low in cost, is prepared with a simple and environment-friendly process and can remediate heavy metal contaminated soil well.

Description

technical field [0001] The invention relates to the technical field of soil remediation, and particularly discloses a heavy metal-contaminated soil remediation material, a preparation method and an application. Background technique [0002] With the continuous advancement of industrialization and urbanization, the problem of heavy metal pollution in my country's soil has been paid more and more attention by people. The pollution of heavy metals in the soil directly leads to the excessive heavy metal content of agricultural products, which seriously affects the quality of cultivated land, food safety and even human health. All countries in the world attach great importance to the research on physical / chemical restoration materials and methods of soil heavy metal pollution. [0003] At present, the most common physical / chemical methods for soil remediation are thermal desorption technology, steam extraction technology, solidification / stabilization technology, leaching technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/08B09C1/08C09K109/00
CPCB09C1/08C09K17/08C09K2109/00
Inventor 顾凯施斌唐朝生刘春李金文
Owner NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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