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Soil remediation agent and preparation method thereof

A technology of soil remediation agent and bentonite, applied in the field of soil pollution remediation, can solve problems such as high cost and decreased soil fertility, and achieve the effects of low cost, reduced heavy metal content, and increased production

Inactive Publication Date: 2017-01-11
SICHUAN HUAZHI BIOLOGICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a soil remediation agent and a preparation method thereof, which can reduce the activity of heavy metals in the soil and effectively solve the problems of high cost and decreased soil fertility in the process of soil treatment

Method used

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  • Soil remediation agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] A soil remediation agent, comprising the following components by weight: 8 parts of slaked lime, 30 parts of limestone, 40 parts of bentonite, 5 parts of sepiolite, 5 parts of biochar, 2 parts of diethyltriaminepentaacetic acid, dimercaptopropane 2 parts of sodium sulfonate, 3 parts of sodium lignosulfonate, 1 part of cysteine, 1 part of potassium sodium tartrate, 1 part of phosphate rock and 0.1 part of sodium sulfide;

[0021] Among them, the biochar is prepared by the following method: put the coconut shell with a water content of 30% in a carbonization furnace, dehydrate and deoxidize it at 250°C for 100 minutes, and then transfer it to carbonization at 650°C for 50 minutes, and then carbonize it after cooling. The product is crushed to a solid powder with a particle size of 0.3-0.8mm;

[0022] Phosphate rock is made of P 2 o 5 Medium and low-grade phosphate rock with a content of less than 25% and a carbonate content of more than 10% and P 2 o 5 It is obtained ...

Embodiment 2

[0028] A soil restoration agent, comprising the following components by weight: 12 parts of slaked lime, 50 parts of limestone, 60 parts of bentonite, 7 parts of sepiolite, 10 parts of biochar, 3 parts of diethyltriaminepentaacetic acid, dimercaptopropane 3 parts of sodium sulfonate, 5 parts of sodium lignosulfonate, 3 parts of cysteine, 1.8 parts of potassium sodium tartrate, 1.5 parts of phosphate rock, 0.5 parts of sodium sulfide;

[0029] Among them, the biochar is prepared by the following method: put the coconut shell with a water content of 10% in a carbonization furnace, dehydrate and discharge oxygen at 220°C for 80 minutes, and then transfer to 600°C for carbonization for 30 minutes, and after cooling, carbonize The product is crushed to a solid powder with a particle size of 0.3-0.8mm;

[0030] Phosphate rock is made of P 2 o 5 Medium and low-grade phosphate rock with a content of less than 25% and a carbonate content of more than 10% and P 2 o 5 It is obtained ...

Embodiment 3

[0036] A soil restoration agent, comprising the following components by weight: 10 parts of slaked lime, 43 parts of limestone, 52 parts of bentonite, 6 parts of sepiolite, 8 parts of biochar, 2 parts of diethyltriaminepentaacetic acid, dimercaptopropane 2 parts of sodium sulfonate, 4 parts of sodium lignosulfonate, 2 parts of cysteine, 1.6 parts of potassium sodium tartrate, 1.2 parts of phosphate rock, 0.2 parts of sodium sulfide;

[0037] Among them, biochar is prepared by the following method: put the coconut shell with a water content of 20% in a carbonization furnace, dehydrate and discharge oxygen at 240°C for 80 minutes, and then transfer to 620°C for carbonization for 40 minutes, and then carbonize it after cooling. The product is crushed to a solid powder with a particle size of 0.3-0.8mm;

[0038] Phosphate rock is made of P 2 o 5 Medium and low-grade phosphate rock with a content of less than 25% and a carbonate content of more than 10% and P 2 o 5 It is obtain...

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Abstract

The invention discloses a soil remediation agent. The soil remediation agent comprises, by weight, 8-12 parts of hydrated lime, 30-50 parts of limestone, 40-60 parts of bentonite, 5-7 parts of sepiolite, 5-10 parts of biological charcoal, 2-3 parts of diethylenetriamine pentaacetic acid, 2-3 parts of sodium dimercaptosulphonate, 3-5 parts of sodium lignosulfonate, 1-3 parts of cysteine, 1-1.8 parts of sodium potassium tartrate tetrahydrate, 1-1.5 parts of phosphate ore and 0-0.5 part of sodium sulfide. A preparation method of the soil remediation agent includes the steps of firstly, weighing the phosphate ore, the sepiolite and the biological charcoal, and grinding into powder; secondly, adding the cysteine, the sodium potassium tartrate tetrahydrate and the sodium sulfide into the ground powder, and stirring; thirdly, continuously adding the rest of substances, and mixing. The preparation method is simple and low in cost, and the prepared soil remediation agent can lower the heavy metal activity in soil, improve the soil, increase soil fertility and increase crop yield.

Description

technical field [0001] The invention belongs to the technical field of soil pollution restoration, and in particular relates to a soil restoration agent and a preparation method thereof. Background technique [0002] According to the "National Soil Pollution Survey Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, the overall situation of the soil environment in the country is not optimistic. protrude. Man-made activities such as industry, mining, agriculture, and high background values ​​of the soil environment are the main causes of soil pollution or exceeding standards. The total over-standard rate of soil in the country was 16.1%, of which the proportions of slightly, lightly, moderately and heavily polluted sites were 11.2%, 2.3%, 1.5% and 1.1%, respectively. Inorganic pollutants are the main type of pollution, followed by organic pollutants, and compound pollutants account for 82.8% of the national total. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C09K17/40C09K101/00C05G3/80
CPCC05B17/00C05G3/00C05G3/80C09K17/40C09K2101/00C05C11/00C05D1/00C05D3/02C05D5/00C05D9/00
Inventor 刘华张广杰闫鹏飞
Owner SICHUAN HUAZHI BIOLOGICAL ENG
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