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Modifier for repairing heavy metal contaminated soil and preparation method and application of modifier

A technology that pollutes soil and heavy metals, applied in the field of ecological environmental protection, can solve the problems of land reclamation and reuse, difficulty in meeting the pollution of various mixed heavy metals in soil, etc.

Active Publication Date: 2020-10-09
SHENGSHI LANDSCAPE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This soil remediation method is suitable for remediation of heavy metal-contaminated soil and has the advantages of low cost. However, the soil treated by the above-mentioned patent is only effective for cadmium, which is difficult to meet the current situation of mixed heavy metal pollution in soil. There are also various promotion difficulties in the field of plowing and reuse

Method used

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  • Modifier for repairing heavy metal contaminated soil and preparation method and application of modifier
  • Modifier for repairing heavy metal contaminated soil and preparation method and application of modifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An improving agent for repairing heavy metal polluted soil, in parts by weight, the improving agent consists of 45 parts of modified zeolite, 25 parts of lime, 5 parts of blast furnace slag, 10 parts of organic fertilizer, 10 parts of humic acid and 5 parts of microbial inoculant mixed; the modified zeolite is mixed with calcined zeolite and a mixed modifier, the quality of the mixed modifier accounts for 15wt% of the quality of the modified zeolite, and the mixed modifier is composed of ammonium phosphate and Cyanex 301 is mixed at a mass ratio of 3:1.

[0031] Above-mentioned improver is obtained by following method:

[0032] (1) Weigh each raw material according to parts by weight;

[0033] (2) Mix the modified zeolite, blast furnace slag, and organic fertilizer to obtain a mixture 1, and mix the lime and humic acid to obtain a mixture 2;

[0034] (3) Let the mixture 1 and the mixture 2 stand for 0.5 hours respectively, combine and mix well, then add the microbial ...

Embodiment 2

[0038] An improving agent for repairing heavy metal polluted soil, in parts by weight, the improving agent consists of 40 parts of modified zeolite, 20 parts of lime, 5 parts of blast furnace slag, 15 parts of organic fertilizer, 10 parts of humic acid and 10 parts of microbial inoculant mixed; the modified zeolite is mixed with calcined zeolite and a mixed modifier, the quality of the mixed modifier accounts for 15wt% of the quality of the modified zeolite, and the mixed modifier is composed of ammonium phosphate and Cyanex 301 is mixed at a mass ratio of 3:1.

[0039] The above improving agent was prepared according to the method of Example 1, except that in step (3), mixture 1 and mixture 2 were left to stand for 2 hours respectively.

[0040] Wherein, the modified zeolite is prepared according to the method of Example 1, the difference is that the microwave irradiation power is 1100W, and the ultrasonic power is 1800W.

Embodiment 3

[0042] An improving agent for repairing heavy metal polluted soil, in parts by weight, the improving agent consists of 30 parts of modified zeolite, 40 parts of lime, 5 parts of blast furnace slag, 15 parts of organic fertilizer, 5 parts of humic acid and 5 parts of microbial bacterial agent mixed; the modified zeolite is mixed with calcined zeolite and a mixed modifier, the quality of the mixed modifier accounts for 15wt% of the quality of the modified zeolite, and the mixed modifier is composed of ammonium phosphate and Cyanex 301 is mixed at a mass ratio of 3:1.

[0043] The above improving agent was prepared according to the method of Example 1, except that in step (3), mixture 1 and mixture 2 were left to stand for 1 hour respectively.

[0044]Wherein, the modified zeolite is prepared according to the method of Example 1, the difference is that the microwave irradiation power is 1200W, and the ultrasonic power is 2000W.

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Abstract

The invention discloses a modifier for repairing heavy metal contaminated soil. The modifier is prepared from the following raw materials in parts by weight; 30 to 60 parts of modified zeolite; 10-50parts of lime, 5-10 parts of blast furnace slag; 10-15 parts of organic fertilizer, 5-10 parts of humic acid and 5-10 parts of a microbial agent, wherein the modified zeolite is formed by mixing calcined zeolite and a mixed modifier, the mass of the mixed modifier accounts for 10-20 wt% of the mass of the modified zeolite, and the mixed modifier is formed by mixing phosphate and Cyanex 301 according to the mass ratio of (2-4): 1; the invention further discloses a preparation method of the modifier and application of the modifier in remediation of heavy metal contaminated soil. The modifier prepared by the method is suitable for various heavy metal contaminated soils, and has the advantages of multiple acting metal varieties, low cost, resource reutilization, ecological environmental protection, short remediation period, good effect, high efficiency, soil fertility increase and the like.

Description

technical field [0001] The invention belongs to the technical field of ecology and environmental protection, and in particular relates to an amendment for repairing heavy metal-contaminated soil, a preparation method thereof, and an application in repairing heavy metal-contaminated soil. Background technique [0002] Soil refers to the loose surface layer on the land surface that is fertile and capable of growing plants, and its thickness is generally about 2 m. Soil not only provides mechanical support for plant growth, but also provides fertility elements such as water, fertilizer, air, and heat for plant growth and development. Due to the rapid growth of population and the rapid development of industry, solid wastes are continuously stacked and dumped on the soil surface, harmful waste water is continuously infiltrated into the soil, and harmful gases and floating dust in the atmosphere are also continuously falling into the soil with rainwater, resulting in soil pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCB09C1/08C09K17/40C09K2101/00
Inventor 花建丽李玉鹏周秉彦陈新黄振吴静静赵萌萌
Owner SHENGSHI LANDSCAPE GRP CO LTD
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