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Compound repair agent for heavy metal polluted soil and application thereof

A contaminated soil and composite restoration technology, applied in the field of environmental protection of contaminated soil restoration, can solve the problems of scope of application, economy, operability, secondary disaster pollution restoration efficiency, etc., to reduce migration and bioavailability, Improve soil fertility and water retention capacity, save labor and labor in the use process

Active Publication Date: 2019-01-18
ANSTEEL GRP MINING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have single or multiple disadvantages that are difficult to overcome in terms of scope of application, economy, operability, secondary disaster pollution, or restoration efficiency.

Method used

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  • Compound repair agent for heavy metal polluted soil and application thereof
  • Compound repair agent for heavy metal polluted soil and application thereof
  • Compound repair agent for heavy metal polluted soil and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of Examples 1-10: according to the weight percentage of the raw materials, mix biochar and bone charcoal, fully stir, and then mix with fly ash evenly to obtain the product. See Table 1.

[0033] Table 1 embodiment 1~10 is used for the composite remediation agent component distribution ratio of heavy metal polluted soil

[0034] Example

Biochar (kg)

Bone char (kg)

Fly ash (kg)

1

50

25

25

2

40

35

25

3

40

30

30

4

40

25

35

5

45

35

20

6

45

30

25

7

45

20

35

8

55

15

30

9

55

30

15

10

55

25

20

[0035] Embodiment 1,4,7,9 are used for the pilot test of the composite restoration agent of heavy metal polluted soil as follows:

[0036] During the period from 2013 to 2014, the surface soil of the heavy metal polluted area around the mining field in the suburbs of Anshan City and the soi...

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Abstract

The invention relates to a compound repair agent for heavy metal polluted soil which is characterized by being prepared from the following raw materials in percent by weight: 40-55% of charcoal, 15-35% of bone powder and 15-35% of coal ash. By taking agricultural or industrial solid wastes which are wide in source and easy to obtain as a raw material, the compound repair agent is simple in process, sufficient in raw material, low in cost and obvious in application effect, reduces the heavy metal mobility and bioavailability of soil, and can solve the problem of sustainable utilization of heavymetal pollution in farmlands and fields of industrial and mineral industry. The application method is simple, the using process is labor-saving, the physical and chemical properties of soil can be also improved effectively, the fertilizer retaining and water retaining ability of soil is improved, and the compound repair agent is easy to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of environmental protection for remediation of polluted soil, in particular to a composite remediation agent for heavy metal polluted soil and its application. Background technique [0002] With the continuous acceleration of my country's industrialization and urbanization process, a large amount of waste generated by site activities in mining, smelting, steel, petroleum, chemical industry and other industries has suffered from surface geological effects such as atmosphere, surface runoff and groundwater, causing industrial enterprise sites and agricultural land to suffer heavily polluted. Among them, the problem of soil heavy metal pollution is particularly serious, which not only easily causes variation and degradation of soil physical, chemical and biological characteristics, but also can endanger human health through enrichment through the food chain. Due to the urgency and demand of contaminated soil re...

Claims

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Application Information

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IPC IPC(8): C09K17/08B09C1/00
CPCB09C1/00C09K17/08
Inventor 邓鹏宏许灏王志忠赵虹魏宏贺
Owner ANSTEEL GRP MINING CO LTD
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