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Borrowed soil lead removal method for soil lead pollution treatment

A lead pollution and soil technology, which is applied in the field of lead removal in soil lead pollution control, can solve the problems of secondary pollution of topsoil and the influence of lead content, and achieve the effects of reducing lead content, low cost and good purification efficiency.

Inactive Publication Date: 2020-02-07
金晨辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to solve the environmental risk of secondary pollution in the replaced topsoil proposed by the above-mentioned background technology. When plants are subsequently planted, the rhizomes of the plants will still be excessively polluted after they go deep into the bottom. The question of the impact of lead content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Step 1: Measure the area of ​​the contaminated soil, and determine the range of the contaminated soil with a hand-held XRF analyzer. The content of lead in the contaminated soil is 500mg / Kg~700mg / Kg, and the content is between 500mg / Kg~700mg / Kg The soil is divided in the polluted area;

[0048] Step 2: Excavate the filter pool on the outside of the polluted soil, the depth of the filter pool is 40cm, and the bottom of the filter pool and the side away from the polluted soil are all poured with concrete, and the pouring thickness is 5cm;

[0049] Step 3: Excavating the upper layer of the polluted soil, the excavation depth is 10cm, adding 10cm of foreign soil, and planting Artemisia argyi on the foreign soil;

[0050] Step 4: put the excavated contaminated soil into the filter tank, and introduce a small amount of river water into the filter tank, the depth of the river water is 20cm, and cultivate water hyacinth in the river water, and the river water in the filter tank i...

Embodiment 2

[0054] Step 1, measure the area of ​​the contaminated soil, and determine the scope of the contaminated soil with a hand-held XRF analyzer. The lead content in the contaminated soil is 700mg / Kg~800mg / Kg, and the content is between 700mg / Kg~800mg / Kg The soil is divided in the polluted area;

[0055] Step 2: Excavate the filter pool on the outside of the polluted soil, the depth of the filter pool is 120cm, and the bottom of the filter pool and the side away from the polluted soil are all poured with concrete, and the pouring thickness is 5cm;

[0056] Step 3: Excavate the upper layer of the polluted soil, the depth of excavation is 20cm, and add 20cm of foreign soil, and plant mulberry trees on the foreign soil;

[0057] Step 4: put the excavated contaminated soil into the filter tank, and introduce a small amount of river water into the filter tank, the depth of the river water is 60cm, and cultivate water hyacinth in the river water, and the river water in the filter tank is ...

Embodiment 3

[0061] Step 1: Measure the area of ​​the contaminated soil, and determine the range of the contaminated soil with a hand-held XRF analyzer. The lead content in the contaminated soil is above 800mg / Kg, and the soil with the content above 800mg / Kg is classified as the contaminated area;

[0062] Step 2: Excavate the filter pool on the outside of the polluted soil, the depth of the filter pool is 200cm, and the bottom of the filter pool and the side away from the polluted soil are all poured with concrete, and the pouring thickness is 5cm;

[0063] Step 3: Excavate the upper layer of the polluted soil, the depth of excavation is 30cm, and add 30cm of foreign soil, and plant ginkgo and Artemisia argyi on the foreign soil;

[0064] Step 4: put the excavated contaminated soil into the filter tank, and introduce a small amount of river water into the filter tank, the depth of the river water is 80cm, and cultivate water hyacinth in the river water, and the river water in the filter ta...

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Abstract

The invention discloses a borrowed soil lead removal method for soil lead pollution treatment. The borrowed soil lead removal method for soil lead pollution treatment is characterized in that surfacesoil of polluted soil is excavated, borrowed soil is added, adsorption plants are planted in the borrowed soil, the non-polluted soil is added, filter ponds are excavated around a polluted area, and the eichhornia crassipes is used to remove lead. The borrowed soil lead removal method for soil lead pollution treatment can effectively reduce the content of the lead in the soil; the plants having agood adsorption effect on heavy metals such as lead can be used to adsorb the lead in the subsequently added borrowed soil to reduce the content of the lead transmitted into the borrowed soil from thebottom polluted soil, at the same time, the excavated polluted soil can be placed in the filter ponds, the aquatic plant eichhornia crassipes is used to adsorb the lead in the soil for purifying thesoil, and polluted water in the filter ponds is used as irrigation water to irrigate the adsorption plants, so that the problem of secondary pollution existing in a traditional borrowed soil deep ploughing method is improved, and the purification method has low costs, thereby being easy to promote and use.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for removing lead from foreign soil for the control of lead pollution in soil. Background technique [0002] Soil is the loose surface layer on the land surface where plants can grow, and it is an indispensable and important substance for life activities on the earth. Due to pollution, the nutritional function, purification function, buffer function and support function of organisms are being lost. Lead is one of the common heavy metal pollution elements in soil. Excess lead in soil can have adverse effects on plant growth. At the same time, it also It can accumulate in plants through plant roots and enter the human body through the food chain, endangering human health. Excess lead accumulated in the human body can lead to confusion in the nervous system, hematopoietic system, digestive system and reproductive system of the human body, especially fo...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 金晨辉
Owner 金晨辉
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