A kind of removal method of heavy metal ni and/or cd in sandy soil

A sandy soil and heavy metal technology, applied in the field of soil heavy metal pollution control, can solve the problems of difficult to find plants and few repairs of heavy metal pollution, and achieve the effects of easy mastery and promotion, low cost, and no secondary pollution

Active Publication Date: 2020-05-19
YULIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is extremely difficult to find plants with heavy metal accumulation, and there are very few reports on the restoration of heavy metal pollution in sandy soil.

Method used

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  • A kind of removal method of heavy metal ni and/or cd in sandy soil
  • A kind of removal method of heavy metal ni and/or cd in sandy soil
  • A kind of removal method of heavy metal ni and/or cd in sandy soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Through detection, determine the area polluted by heavy metal Ni and Cd and the content of Ni and Cd in the soil in this area. The concentration of heavy metal Ni in the soil is less than or equal to 600mg / kg, and the concentration of heavy metal Cd is less than or equal to 10mg / kg. On the soil in the polluted area, select Artemisia spp. seedlings with a plant height of 5 cm, good growth, and a difference in biomass of <5 g for planting;

[0039] 2) The planting method is concentric circle radiation, that is, first determine the center of the area as the origin, and radiate concentric circles with a radius of 30cm. The radius difference between two adjacent circles is 30cm, and the distance between plants on the same circle is 20cm.

[0040] 3) Artemisia basilicum is allowed to grow freely under suitable natural conditions without artificial interference. Harvest all the plants after maturity, properly pretreat the harvested biomass, and then ferment to produce biogas...

Embodiment 2

[0044] 1) Through detection, determine the area polluted by heavy metal Ni and Cd and the content of Ni and Cd in the soil in this area. The concentration of heavy metal Ni in the soil is less than or equal to 600mg / kg, and the concentration of heavy metal Cd is less than or equal to 10mg / kg. On the soil in the polluted area, select Artemisia spp. seedlings with a plant height of 6 cm, good growth, and a difference in biomass of <5 g for planting;

[0045] 2) Choose the concentric circle radiation as the planting method, that is, first determine the center of the area as the origin, and radiate the concentric circles with a radius of 35cm. The radius difference between two adjacent circles is 40cm, and the distance between plants on the same circle is 30cm.

[0046] 3) Artemisia basilicum is allowed to grow freely under suitable natural conditions without artificial interference. Harvest all the plants after maturity, properly pretreat the harvested biomass, and then ferment to...

Embodiment 3

[0050] 1) Through detection, determine the area polluted by heavy metal Ni and Cd and the content of Ni and Cd in the soil in this area. The concentration of heavy metal Ni in the soil is less than or equal to 600mg / kg, and the concentration of heavy metal Cd is less than or equal to 10mg / kg. On the soil in the polluted area, select Artemisia spp. seedlings with a plant height of 7cm, good growth, and a difference in biomass of <5g for planting;

[0051] 2) The planting method is concentric circle radiation, that is, first determine the center of the area as the origin, and radiate concentric circles with a radius of 40cm. The radius difference between two adjacent circles is 50cm, and the distance between plants on the same circle is 40cm.

[0052] 3) Artemisia basilicum is allowed to grow freely under suitable natural conditions without artificial interference. Harvest all the plants after maturity, properly pretreat the harvested biomass, and then ferment to produce biogas. ...

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Abstract

The invention relates to removal method for heavy metal Ni and / or Cd in sandy soil. The removal method comprises the following steps: planting artemisia abrotanum seedlings in the soil polluted by the heavy metal Ni and / or Cd; harvesting the artemisia abrotanum seedlings after the artemisia abrotanum seedlings naturally grow to be mature; and repeatedly planting until the content of Ni and / or Cd in the soil meets standards, thereby completing removal for the heavy metal Ni and / or Cd in the sandy soil. According to the removal method disclosed by the invention, artemisia abrotanum is easy to survive in the sandy soil through researches; moreover, artemisia abrotanum is a tolerant species to the heavy metal Ni and / or Cd, and is still capable of normally growing when the concentration of the heavy metal Ni and / or Cd in the soil severely exceeds the limit; the content of Ni in the plant body of the overground part exceeds 400mg / kg, and the content of Cd exceeds 2mg / kg; and artemisia abrotanum has the characteristics of being high in biomass, high in the total amount of absorption for Ni and / or Cd, of the overground part, and high in tolerance to Ni and / or Cd.

Description

【Technical field】 [0001] The invention relates to the field of treatment of soil heavy metal pollution, in particular to a method for removing heavy metal Ni and / or Cd from sandy soil. 【Background technique】 [0002] Sandy soil generally refers to a type of soil with similar properties to sandy soil. Its physical particle content is about 15%, and its performance of water retention, water retention, and fertilizer retention is weak. Distributed in Northwest my country. In recent years, with the rapid development of energy and chemical enterprises in this region, the illegal discharge of a large amount of sewage, the deposition of heavy metals in the atmosphere, and the accumulation of heavy metal pollutants have caused the already barren soil to be seriously polluted by heavy metals, seriously threaten human health. Therefore, how to effectively restore and control heavy metal pollution in sandy soil has become a top priority. [0003] Commonly used soil heavy metal pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 相玉琳相玉秀李越王立鹏王若恺
Owner YULIN UNIV
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