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A kind of repairing agent and its preparation method and application

A restorative agent and heavy metal technology, applied in the field of soil remediation, can solve the problems of cadmium and arsenic antagonistic effect defects, etc., and achieve the effects of improved curing effect, short repair period and simple operation

Active Publication Date: 2022-08-02
云南省生态环境科学研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of cadmium and arsenic antagonistic effects in the existing soil heavy metal pollution solidification technology in the repair of heavy metal pollution, thereby providing a repair agent and its preparation method and application

Method used

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  • A kind of repairing agent and its preparation method and application
  • A kind of repairing agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides a kind of repairing agent, and its preparation method is as follows:

[0031] Preparation of Biochar:

[0032] The corn stalks were ground and passed through a 2 mm sieve, and the undersize was baked at 105 °C for 1 h and then continued to be roasted in a muffle furnace at a heating rate of 10 °C / min to 600 °C for 2 hours to obtain biomass charcoal.

[0033] Preparation of Restorative:

[0034] Weigh 500g of the above-mentioned biomass charcoal, 300g of tailings, 200g of dolomite, 200g of agate beads, and 100mL of water, then put them in a ball-milling jar, and mill them at 500rpm for 5min. The material is ground and passed through a 2mm sieve, and the material under the sieve is the repair agent.

Embodiment 2

[0036] The present embodiment provides a kind of repairing agent, and its preparation method is as follows:

[0037] Preparation of Biochar:

[0038] The rice husks were ground and passed through a 2 mm sieve, and the undersize was baked at 105 °C for 1 h and then continued to be roasted in a muffle furnace at a heating rate of 10 °C / min to 600 °C for 2 hours to obtain biomass charcoal.

[0039] Preparation of Restorative:

[0040] Weigh 400g of the above-mentioned biomass charcoal, 370g of tailing iron ore, 150g of dolomite, 240g of agate beads, and 100mL of water, put them in a ball-milling jar, and perform ball milling at 500rpm for 5min. The material is ground and passed through a 2mm sieve, and the material under the sieve is the repair agent.

Embodiment 3

[0042] The present embodiment provides a kind of repairing agent, and its preparation method is as follows:

[0043] Preparation of Biochar:

[0044] The corn stalks were ground and passed through a 2 mm sieve, and the undersize was baked at 105 °C for 1 h and then continued to be roasted in a muffle furnace at a heating rate of 10 °C / min to 600 °C for 2 hours to obtain biomass charcoal.

[0045] Preparation of Restorative:

[0046] Weigh 600g of the above-mentioned biomass charcoal, 230g of iron ore tailings, 250g of dolomite, 300g of agate beads, and 110mL of water, put them in a ball-milling jar, and mill them at 500 rpm for 5 minutes. The material is ground and passed through a 2mm sieve, and the material under the sieve is the repair agent.

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Abstract

The invention relates to the technical field of soil remediation, in particular to a remediation agent and a preparation method and application thereof. The repairing agent comprises the following raw materials by weight: 40-60 parts of biomass charcoal, 23-37 parts of tailings and 15-25 parts of dolomite. By using biomass carbon, tailings and dolomite as raw materials and limiting the amount of each raw material, the solidification of cadmium is realized through precipitation, ion exchange, complexation, etc., through precipitation, site competition, complexation, redox, etc. Action to achieve the curing of arsenic. The raw materials cooperate with each other and play a synergistic role. When used to remediate heavy metal polluted soil, it can effectively fix heavy metals in the soil, especially cadmium and arsenic, and the curing effect of cadmium and arsenic is significantly improved, effectively solving the existing There is an antagonistic effect between cadmium and arsenic in the remediation of heavy metal pollution by solidification. Moreover, the remediation period is short, the operation is simple, and it is suitable for the remediation of large areas of heavy metal contaminated soil.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a remediation agent and a preparation method and application thereof. Background technique [0002] Soil heavy metal pollution is one of the serious environmental pollution problems. In the field of environmental pollution, heavy metals are usually defined as metal elements or metalloid elements that are obviously toxic to organisms, such as lead, zinc, copper, cadmium, arsenic, mercury, chromium, nickel, etc. These heavy metals enter the human body through the food chain and accumulate in the human body, causing headache, dizziness, insomnia, forgetfulness, joint pain, and even teratogenic, carcinogenic and other diseases. Therefore, the remediation of heavy metal-contaminated soil is an urgent problem to be solved. [0003] According to the characteristics of accumulation, latent, irreversible and degradation of heavy metals in polluted soil, the current use of soil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/06B09C1/08B09C1/00
CPCC09K17/06B09C1/08B09C1/00
Inventor 和丽萍王祺孔娇艳王苗曾沛艺张冉康绍果王丽魏中华赵彦波李国泰吴见珣
Owner 云南省生态环境科学研究院
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