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Soil pollution treatment method based on plant physiology and physical regulation

A soil pollution and plant technology, which is applied in the field of soil pollution control based on plant physiology and physical regulation, can solve problems such as the types of valuable resources, the limitation of the growth environment of the capacity and its own physiological conditions, and the high cost restoration effect. The effect of operating costs, cost-effectiveness, low material and energy consumption

Active Publication Date: 2020-11-10
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also outstanding problems, that is, the types and capacity of plants to absorb pollutants or valuable resources are greatly limited by their plant growth environment and their own physiological conditions, resulting in high costs and limited repair effects. A new method is urgently needed To solve the problems existing in the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select a piece of polluted soil, which contains heavy metal elements such as arsenic, lead, mercury, cadmium and chromium, and the total concentration of the above heavy metals in the soil is 11.3mg / g soil, plant centipede grass plants on this soil, and the plant density is 1 plant per 10cm x10cm square, by adding oxalic acid, the quality of adding oxalic acid is 2.5g / kg soil at a time, adjust the pH value of the soil to 3.7, maintain the pH value of the soil at 3.7, maintain 96 hours under sunlight, harvest the plants, and carry out Detection and sampling of contaminated soil found that the removal rate of heavy metals in the soil reached more than 80%.

Embodiment 2

[0032] Select the polluted soil identical with embodiment 1, wherein contain heavy metal elements such as arsenic, lead, mercury, cadmium and chromium, the total concentration of above-mentioned heavy metal in the soil is 11.3mg / g soil, plant centipede grass plant equally on this soil, plant Density is every 10cm x 10cm square of 1 strain, and what is different from embodiment 1 has added hydrochloric acid (the massfraction of hydrochloric acid is 30%), once the dosage of adding hydrochloric acid is 2g / kg soil, the pH value of regulating soil is 2.1, maintains soil The pH value of the plant is 2.1, and it is maintained under sunlight for 48 hours. The plants are harvested, tested, and the sampling test of the polluted soil shows that the removal rate of heavy metals in the soil reaches more than 75%.

Embodiment 3

[0034] Select the polluted soil identical with embodiment 1, wherein contain heavy metal elements such as arsenic, lead, mercury, cadmium and chromium, the total concentration of above-mentioned heavy metal in the soil is 11.3mg / g soil, plant centipede grass plant equally on this soil, plant Density is 1 strain per 10cm x 10cm square, and what is different from embodiment 1 is that sodium hydroxide has been added, and once the dosage of adding sodium hydroxide is 1.75g / kg soil, the pH value of regulating soil is 9.8, and the pH value of maintenance soil is 9.8. 9.8, Keep it under sunlight for 48 hours, harvest the plants, test them, and take samples of the polluted soil and find that the removal rate of heavy metals in the soil is over 75%.

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Abstract

The invention discloses a soil pollution treatment method based on plant physiology and physical regulation. The soil pollution treatment method based on plant physiology and physical regulation and control comprises: plants are planted in polluted soil, wherein the pH value of the polluted soil is adjusted to be 1.99-6.99 or 7.09-9.99, so that the physiological barrier of a plant root system structure for pollutant or valuable resource absorption in the polluted soil is broken by adjusting the pH value of the polluted soil, and meanwhile the transpiration of the plants is accelerated, and thepollutants or valuable resources in the soil or the water body enter the plant body. According to the method, the types of pollutants or valuable resources are broken through, the absorption capacityis limited by the plant growth environment and the physiological conditions of the plants, the operation cost and complexity can be greatly reduced, and the repairing effect and resource recycling capacity with extremely high cost performance are obtained.

Description

technical field [0001] The invention relates to the technical field of ecological restoration, in particular to a soil pollution control method based on plant physiology and physical regulation. Background technique [0002] Resource exploitation and industrial development have resulted in increased discharge of pollutants into the atmosphere and water bodies, and some pollutants are valuable resources at the same time. Pollutants will partially gather in the soil along with these flowing media, especially in the mining area and surrounding soil; the types of pollutants mainly include organic matter and metals. The accumulation of harmful substances in the soil directly causes the absorption and migration of planted crops and vegetables into their bodies, and the transmission through the food chain poses serious risks to human health. Pollutants accumulated in plants can induce a variety of physiological, morphological and biochemical toxicity of plants, and accumulate afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00Y02W10/37
Inventor 曹晏
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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