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Preparation and application of a conditioner capable of remediating heavy metal-contaminated soil

A soil conditioner and a technology for polluted soil, applied in the field of soil remediation and soil improvement, can solve the problems of inability to improve soil, only passivate heavy metals, unstable effect, etc., achieve enhanced neutralization ability, good adsorption performance, and avoid attack Effect

Active Publication Date: 2020-11-24
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention aims at the problem that the existing soil heavy metal passivation agent only passivates heavy metals but cannot improve the soil, and the long-term passivation effect is unstable. A variety of materials are proposed to passivate and repair soil heavy metal pollution, and at the same time improve soil quality, improve soil fertility, and improve crop yield and quality.

Method used

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  • Preparation and application of a conditioner capable of remediating heavy metal-contaminated soil
  • Preparation and application of a conditioner capable of remediating heavy metal-contaminated soil
  • Preparation and application of a conditioner capable of remediating heavy metal-contaminated soil

Examples

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Effect test

Embodiment 1

[0032] A soil conditioner capable of repairing heavy metal-contaminated soil, mainly composed of the following raw materials in parts by weight: 400 parts of biomass power plant ash, 20 parts of vermiculite with a thermal expansion ratio of more than 8 times, and water-soluble 18 parts of humic acid, 8 parts of gamma-aminopropyl triethoxysilane with a purity greater than 95%, 1 part of polyacrylamide with a purity greater than 80% and 90 parts of absolute ethanol with a purity greater than 99%. The above raw materials are taken according to the quantity by weight, and the preparation process comprises the following steps:

[0033] A. Use a ball mill or a Raymond mill to pulverize the biomass power plant ash to a particle size of 0.002mm, and set aside;

[0034] B. Mix vermiculite with a particle size of less than 2mm and a humic acid aqueous solution with a mass fraction of 7% in a mass ratio of 1:10, shake for 20 hours, then heat the mixed system to 80 degrees Celsius, keep i...

Embodiment 2

[0039]A soil conditioner capable of repairing heavy metal-contaminated soil, mainly composed of the following raw materials in parts by weight: 600 parts of biomass power plant ash, 30 parts of vermiculite with a thermal expansion ratio of more than 8 times, and water-soluble 25 parts of humic acid, 13 parts of gamma-aminopropyltriethoxysilane with a purity greater than 95%, 5 parts of polyacrylamide with a purity greater than 80%, and 120 parts of absolute ethanol with a purity greater than 99%. The above raw materials are taken according to the quantity by weight, and the preparation process comprises the following steps:

[0040] A. Use a ball mill or a Raymond mill to pulverize the biomass power plant ash until the particle size is less than 0.075mm, and set aside;

[0041] B. Mix the vermiculite with a particle size of less than 2mm and the humic acid aqueous solution with a mass fraction of 7% in a mass ratio of 1:15, shake for 30 hours, then heat the mixed system to 90 ...

Embodiment 3

[0046] A soil conditioner capable of repairing heavy metal-contaminated soil, mainly composed of the following raw materials in parts by weight: 500 parts of biomass power plant ash, 25 parts of vermiculite with a thermal expansion ratio of more than 8 times, and water-soluble 20 parts of humic acid, 10 parts of gamma-aminopropyltriethoxysilane with a purity greater than 95%, 3 parts of polyacrylamide with a purity greater than 80% and 100 parts of absolute ethanol with a purity greater than 99%. The above raw materials are taken according to the quantity by weight, and the preparation process comprises the following steps:

[0047] A. Use ball mill or Raymond mill to pulverize the biomass power plant ash to a particle size of 0.055 mm, and set aside;

[0048] B. Mix the vermiculite with a particle size of less than 2mm and the humic acid aqueous solution with a mass fraction of 7% in a mass ratio of 1:12, shake for 25 hours, then heat the mixed system to 85 degrees Celsius, k...

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Abstract

The invention provides a preparation and application of a soil conditioner capable of repairing heavy metal contaminated soil. Through the adopted technical scheme, biomass power plant ash is taken asa main ingredient, the biomass power plant ash is ground to be below 0.075 mm by using a grinding mill, vermiculite, humic acid, gamma-aminopropyl triethoxy silane and polyacrylamide are added, and the mixture is sufficiently mixed and is uniformly adsorbed by using vibration and ultrasonic techniques, and the soil conditioner is prepared after pelleting. The soil conditioner produced by the technique can be used for repairing heavy metal soil contamination to remove soil toxicity, and also has the effects of improving soil quality, improving soil fertility and improving crop yield and quality.

Description

technical field [0001] The invention belongs to the technical field of soil remediation and soil improvement, and relates to a soil conditioner, in particular to the preparation and application of a conditioner capable of repairing heavy metal polluted soil. Background technique [0002] In recent years, my country's soil has been seriously polluted by heavy metals, which urgently needs to be repaired and treated. In April 2014, the Ministry of Land and Resources and the Ministry of Environmental Protection jointly issued the "National Soil Pollution Survey Bulletin". 7.0%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%, 4.8%. Urgently in need of restoration. [0003] The current main farmland heavy metal pollution remediation technologies in my country are phytoremediation and passivation remediation. Among them, phytoremediation is to plant heavy metal-enriched plants, absorb active heavy metals in the soil into the plants, harvest and incinerate the enriched plants, and then dispo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/00B09C1/08C05G3/00C05G3/80C09K101/00
CPCB09C1/00B09C1/08C05D9/00C05G3/00C05G3/80C09K17/40C09K2101/00C05F11/02
Inventor 张威吕晓立韩占涛宋乐王磊李雄光
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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