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Soil remediation agents and soil remediation methods

A soil remediation agent and soil technology, which is applied in the field of soil remediation agent and soil remediation, and can solve the problems of low curing efficiency and poor stability

Active Publication Date: 2021-05-25
深圳市播绿者生态科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the soil restoration materials on the market have the problems of low solidification efficiency and poor stability.

Method used

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  • Soil remediation agents and soil remediation methods
  • Soil remediation agents and soil remediation methods
  • Soil remediation agents and soil remediation methods

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] see figure 1 , the preparation method of the soil remediation agent of one embodiment, is a kind of preparation method of above-mentioned soil remediation agent, comprises the following steps:

[0039] Step S110: Weigh the following raw materials in parts by mass: 20-40 parts of nano-phosphate, 20-40 parts of modified silicon-containing minerals, 10-30 parts of industrial waste, 10-20 parts of magnesium compound And 5-10 parts of pH regulator.

[0040] Wherein, the preparation process of nano-phosphate comprises: adding the solution containing calcium source into ammonium hydrogen phosphate solution or phosphoric acid solution to obtain nano-phosphate. Specifically, the calcium source is selected from one of calcium hydroxide, calcium chloride and calcium nitrate. Further, after the step of adding the solution containing the calcium source into the ammonium hydrogen phosphate solution or the phosphoric acid solution, the steps of adjusting pH, stirring, standing for a...

Embodiment 1

[0065] The preparation process of the soil remediation agent of the present embodiment is specifically as follows:

[0066] (1) Weigh 200 g of calcium hydroxide (industrial grade, calcium hydroxide content ≥ 96%) and place it in a 2000 mL beaker, add 1000 mL of deionized water, and stir magnetically to form a uniform solution. Measure 100mL of industrial-grade phosphoric acid solution (phosphoric acid content ≥ 85%) and place it in a 5000mL beaker, add 1000mL of deionized water to dilute the phosphoric acid, control the dropping rate to 30mL / min, and add the uniform solution dropwise to the diluted phosphoric acid solution In the process, the pH value of the reaction was controlled at 10-12 by adding ammonia water dropwise, then stirred at 160r / min and reacted at room temperature for 4 hours, and then left to age for 2 hours. After collecting the supernatant, the precipitate was filtered and washed twice. After drying, the obtained product is nano-hydroxyapatite.

[0067] (2)...

Embodiment 2

[0070] The preparation process of the soil remediation agent of the present embodiment is specifically as follows:

[0071](1) Weigh 200 g of calcium hydroxide (industrial grade, calcium hydroxide content ≥ 96%) and place it in a 2000 mL beaker, add 1000 mL of deionized water, and stir magnetically to form a uniform solution. Measure 106.5mL of 85% industrial-grade phosphoric acid solution in a 5000mL beaker, add 1000mL deionized water to dilute the phosphoric acid, control the rate of addition to 30mL / min, add the uniform solution dropwise to the diluted phosphoric acid solution, and Add ammonia water to control the reaction pH value at 6-8, then react at room temperature for 4 hours with stirring at 160r / min, and then let it stand and age for 2 hours. After collecting the supernatant, filter the precipitate, wash it twice, and dry it to obtain the product It is nano calcium phosphate.

[0072] (2) Weigh 10g of ferric sulfate and place it in a 1000mL beaker, add 500mL of dei...

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Abstract

The invention relates to a soil remediation agent and a soil remediation method. In parts by mass, the raw materials for preparing the above-mentioned soil remediation agent include: 20-40 parts of nano-phosphate, 20-40 parts of modified silicon-containing minerals, 10-30 parts of industrial waste, and 10-20 parts of magnesium compounds. and 5 to 10 parts of a pH regulator, the modified silicon-containing mineral is a silicon-containing mineral modified by a modified product, and the modified product is selected from one of iron salts and amino coupling agents. When the above-mentioned soil remediation agent is used, it has high curing efficiency for soil and good stability.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a soil restoration agent and a soil restoration method. Background technique [0002] With the development of urbanization and industrialization, the situation of soil heavy metal pollution is becoming increasingly severe. Soil heavy metal pollution mainly comes from the atmospheric deposition of pollutants, sewage irrigation, agricultural material application and solid waste stacking, etc. It has the characteristics of concealment, hysteresis, irreversibility, refractory, and superficial aggregation, which leads to soil heavy metal restoration. The project is not easy to carry out. Due to the high population pressure in our country, it is impossible to carry out large-scale recreation of polluted soil, plant non-food crops or carry out phytoremediation. However, engineering measures such as soil filling are expensive and difficult to implement, and landfilling of polluted soil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/08
CPCB09C1/08B09C2101/00C09K17/40
Inventor 王胜凡王磊林明庄毅璇吴世闽
Owner 深圳市播绿者生态科技股份有限公司
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