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Method of Remediating Heavy Metal Contaminated Soil Using Spray Seeding Technology

A technology of contaminated soil and heavy metals, applied in the field of phytoremediation of heavy metal-contaminated soils, can solve the problems of poor enrichment of heavy metal pollutants by plants, high cost of pollution control, cumbersome planting methods, etc., to achieve good landscape effects and strong tolerance to severe weather Effects of resistance, tolerance and landscape value

Active Publication Date: 2020-04-17
青岛冠中生态股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method that can be popularized and used in a large area and uses the spraying technology to repair heavy metal-contaminated soil. High post-care costs and technical problems of high pollution control costs

Method used

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  • Method of Remediating Heavy Metal Contaminated Soil Using Spray Seeding Technology

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The method for repairing heavy metal lead, chromium and zinc-contaminated soil by spraying technology is as follows: (1) repair the heavy metal-contaminated area to be repaired, remove sundries, weeds, garbage, etc., and level the raised parts of the ground; 2) Spraying the substrate, spraying the planting substrate containing seeds on the leveled area, the thickness is 3-5cm, the seeds are any one or several of Nitraria, Haloxylon, flower stick, Caragana microphylla, through The growth of plant roots enriches the heavy metal pollutants in the soil surface and deep layers.

[0025] The planting matrix includes the following components by volume ratio, clay soil 25%; perlite 15%; vermiculite 13%; peat soil 10%; slow-release fertilizer 2%; stabilizer 1%; %; clear water 30.1%. The slow-release fertilizer is special compound fertilizer and superphosphate, and the special compound fertilizer is a fertilizer containing nitrogen, phosphorus and potassium, in which the weight ...

Embodiment 2

[0027] The method for repairing heavy metal lead, chromium and zinc-contaminated soil by spraying technology is as follows: (1) repair the heavy metal-contaminated area to be repaired, remove sundries, weeds, garbage, etc., and level the raised parts of the ground; 2) Spraying the substrate, spraying the planting substrate containing seeds on the leveled area, the thickness is 3-5cm, the seeds are any one or several of Nitraria, Haloxylon, flower stick, Caragana microphylla, through The growth of plant roots enriches the heavy metal pollutants in the soil surface and deep layers.

[0028] The planting matrix includes the following components in terms of volume ratio, clay soil 15%; perlite 8%; vermiculite 16.12%; peat soil 15%; slow-release fertilizer 4%; stabilizer 3%; %; clear water 38%. The slow-release fertilizer is special compound fertilizer and superphosphate, and the special compound fertilizer is a fertilizer containing nitrogen, phosphorus and potassium, in which th...

Embodiment 3

[0030] The method for repairing heavy metal lead, chromium and zinc-contaminated soil by spraying technology is as follows: (1) repair the heavy metal-contaminated area to be repaired, remove sundries, weeds, garbage, etc., and level the raised parts of the ground; 2) Spraying the substrate, spraying the planting substrate containing seeds on the leveled area, the thickness is 3-5cm, the seeds are any one or several of Nitraria, Haloxylon, flower stick, Caragana microphylla, through The growth of plant roots enriches the heavy metal pollutants in the soil surface and deep layers.

[0031] The planting matrix includes the following components in terms of volume ratio, clay soil 29%; perlite 8.65%; vermiculite 18%; peat soil 8%; slow-release fertilizer 2%; stabilizer 1%; %; clear water 28%. The slow-release fertilizer is special compound fertilizer and superphosphate, and the special compound fertilizer is a fertilizer containing nitrogen, phosphorus and potassium, in which the...

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Abstract

The invention provides a method for remedying heavy metal contaminated soil with a spray-seeding technology, and relates to the technical field of phytoremediation for the heavy metal contaminated soil. The method comprises the steps of clearing an area to be remedied, removing sundries, flattening the raised part on ground, and then seeding a substrate layer containing seeds on the soil surface through spraying; the thickness of the substrate layer is 3-5 cm, and the seeds are one or more of nitraria, haloxylon ammodendron, hedysarum scoparium and caragana microphylla; and heavy metals including lead, chromium and zinc in the soil are collected and absorbed through plant growth, and the degree of soil contamination is reduced. The method has the beneficial effects of simple operation, lowremediation cost and later maintenance cost, good collection effect of the heavy metals, and high governance efficiency, and can be applied widely.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of heavy metal polluted soil, in particular to a method for repairing heavy metal polluted soil by spraying technology. Background technique [0002] With the rapid development of the global economy, various pollutants are continuously released to the environment, and pollutants containing heavy metals enter the soil environment in various forms, and the pollution is becoming more and more serious. Because soil heavy metal pollution has the characteristics of multiple sources, concealment, accumulation, irreversibility, and the severity of pollution consequences, soil heavy metal pollution has been compared to a "chemical time bomb" by environmental academics. [0003] The main migration of heavy metals in soil mainly includes three processes: mechanical migration, physical-chemical migration (such as dissolution-precipitation, oxidation-reduction, etc.) It may migrate to animals and hum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 李春林陈舒曹志泉曲宁
Owner 青岛冠中生态股份有限公司
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