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Remediation agent suitable for lead-contaminated soil and preparation method thereof

A lead-contaminated soil and remediation agent technology, applied in soil conditioning materials, chemical instruments and methods, applications, etc., can solve problems that are difficult to repair and endanger human health, and achieve a wide range of applications, environmental friendliness, and good stabilization effects Effect

Inactive Publication Date: 2020-02-14
湘潭海泡石科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Soil lead pollution is concealed, lagging and long-term, and it is difficult to repair. When lead accumulates in the soil to a certain extent, lead and lead compounds can generally enter the human body through water, air and food, directly endangering human health; at the same time, Lead and lead compounds are elements that are strongly accumulated by plants, and the growth of crops will be inhibited

Method used

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  • Remediation agent suitable for lead-contaminated soil and preparation method thereof

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Effect test

Embodiment 1

[0022] A remediation agent suitable for lead-contaminated soil is prepared from the following raw materials in parts by weight: 20 parts of sepiolite, 50 parts of sodium sulfide, 10 parts of calcium dihydrogen phosphate, and 20 parts of calcium carbonate; the average particle size of each material is 200 meshes.

[0023] The described preparation method of the remediation agent suitable for lead-contaminated soil, the specific steps are:

[0024] (1) Grind the sepiolite ore to 200 mesh, and carry out modification treatment. The sepiolite modification is kept at 60°C for 5min under microwave radiation;

[0025] (2) Mixing the modified sepiolite with sodium sulfide, calcium dihydrogen phosphate and calcium carbonate, and packaging to obtain a sepiolite-based repair agent for lead-contaminated soil.

Embodiment 2

[0027] A remediation agent suitable for lead-contaminated soil is prepared from the following raw materials in parts by weight: 20 parts of sepiolite, 50 parts of sodium sulfide, 20 parts of calcium dihydrogen phosphate, and 10 parts of calcium carbonate; the average particle size of each material is 200 meshes.

[0028] The described preparation method of the remediation agent suitable for lead-contaminated soil, the specific steps are:

[0029] (1) Grind the sepiolite ore to 200 mesh and carry out modification treatment. The sepiolite modification is kept at 80°C for 5min under microwave radiation;

[0030] (2) Mixing the modified sepiolite with sodium sulfide, calcium dihydrogen phosphate and calcium carbonate, and packaging to obtain a sepiolite-based repair agent for lead-contaminated soil.

Embodiment 3

[0032] A remediation agent suitable for lead-contaminated soil is prepared from the following raw materials in parts by weight: 30 parts of sepiolite, 40 parts of sodium sulfide, 20 parts of calcium dihydrogen phosphate, and 10 parts of calcium carbonate; the average particle size of each material is 200 meshes.

[0033] The described preparation method of the remediation agent suitable for lead-contaminated soil, the specific steps are:

[0034] (1) Grind the sepiolite ore to 200 mesh, and carry out modification treatment. The sepiolite modification is kept at 80°C for 20min under microwave radiation;

[0035] (2) Mixing the modified sepiolite with sodium sulfide, calcium dihydrogen phosphate and calcium carbonate, and packaging to obtain a sepiolite-based repair agent for lead-contaminated soil.

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Abstract

The invention discloses a remediation agent suitable for lead-contaminated soil and a preparation method thereof. The remediation agent suitable for lead-contaminated soil is prepared from the following raw materials by weight: 20-60 parts of sepiolite, 10-50 parts of sodium sulfide, 5-35 parts of calcium dihydrogen phosphate and 5-20 parts of calcium carbonate. The average particle size of the materials is 200 meshes. The preparation method of the sepiolite-based remediation agent for lead-contaminated soil includes the steps of: grinding sepiolite ore to 200 meshes, and carrying out microwave modification treatment; mixing the modified sepiolite with sodium sulfide, calcium dihydrogen phosphate and calcium carbonate, and performing packaging to obtain the sepiolite-based remediation agent for lead-contaminated soil. The sepiolite-based remediation agent prepared according to the invention is used for remediation of lead-contaminated soil, can significantly reduce the concentration oflead in soil leachate, and has a stabilization rate up to 99.5% or more. The sepiolite-based remediation agent prepared according to the invention has the advantages of environmental friendliness, low remediation cost and strong operability, and has good economic benefits and wide social benefits.

Description

technical field [0001] The invention belongs to the field of environmental protection soil restoration, and particularly relates to a restoration agent suitable for lead-contaminated soil and a preparation method thereof. Background technique [0002] Soil lead pollution is concealed, hysteretic and long-term, and it is difficult to repair. When lead accumulates to a certain level in soil, lead and lead compounds can generally enter the human body through water, atmosphere and food, directly endangering human health; at the same time, Lead and lead compounds are elements that are strongly accumulated by plants, and the growth of crops will be inhibited. [0003] At present, the domestic soil remediation technology is developing rapidly, mainly including engineering measures, including soil removal method, soil replacement method and soil turning method; physical repair technology, including curing / stabilization, physical separation repair, vitrification repair, electric repa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06C09K109/00
CPCC09K17/06C09K2109/00
Inventor 廖祥陈秋霖曾召刚
Owner 湘潭海泡石科技有限公司
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