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Remediation agent and preparation method and application thereof

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

Active Publication Date: 2021-03-26
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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  • Remediation agent and preparation method and application thereof
  • Remediation agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0031] Preparation of biochar:

[0032] Corn stalks were ground and passed through a 2mm sieve, and the undersieve was baked at 105°C for 1 hour and then roasted in a muffle furnace at a rate of 10°C / min to 600°C for 2 hours to obtain biochar.

[0033] Preparation of repair agent:

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

Embodiment 2

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

[0037] Preparation of biochar:

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

[0039] Preparation of repair agent:

[0040] Weigh 400g of the above-mentioned biochar, 370g iron tailings, 150g dolomite, 240g agate beads, 100mL water, then put them in a ball mill jar, and ball mill for 5min at a speed of 500rpm. After discharging, take out the agate beads, and take out the agate beads. The material is ground and passed through a 2mm sieve, and the under-sieve is the restoration agent.

Embodiment 3

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

[0043] Preparation of biochar:

[0044] Corn stalks were ground and passed through a 2mm sieve, and the undersieve was baked at 105°C for 1 hour and then roasted in a muffle furnace at a rate of 10°C / min to 600°C for 2 hours to obtain biochar.

[0045] Preparation of repair agent:

[0046] Weigh 600g of the above-mentioned biomass charcoal, 230g iron tailings, 250g dolomite, 300g agate beads, 110mL water, then put them in a ball mill jar, and ball mill for 5min at a speed of 500rpm. After discharging, take out the agate beads, and take out the agate beads. The material is ground and passed through a 2mm sieve, and the under-sieve is the restoration 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 remediation agent is prepared from the following raw materials in parts by weight: 40-60 parts of biomass charcoal, 23-37 parts of iron tailings and 15-25 parts of dolomite. Biomass charcoal, tailing iron ore and dolomite are adopted as raw materials, the dosage of each raw material is limited, cadmium is cured through the effects of precipitation, ion exchange, complexing and the like, and arsenic is cured through the effects of precipitation, point competition, complexing, oxidation reduction and the like. All the raw materials are matched with one another to play a synergistic role, heavy metal, especially cadmium and arsenic, in soil can be effectively fixed when the heavy metal contaminated soil remediation agent is used for remediating heavy metal contaminated soil, the cadmium and arsenic immobilization effect is remarkablyimproved, and the problem that cadmium and arsenic have an antagonistic effect when an existing immobilization method is used for remediating heavy metal contaminated soil is effectively solved. Moreover, the remediation period is short, operation is easy, and the remediation agent is suitable for large-area heavy metal contaminated soil remediation.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a remediation agent and its preparation method and application. 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 headaches, dizziness, insomnia, forgetfulness, joint pain, and even teratogenic, carcinogenic and other diseases. Therefore, remediation of heavy metal-contaminated soil is an urgent problem to be solved. [0003] According to the characteristics of accumulation, latency, irreversibility and degradation of heavy metals in polluted soil, the current use of soil heavy...

Claims

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Application Information

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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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