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Method for restoring heavy metal contaminated soil through activating agent and microorganism reinforced plants

A contaminated soil and phytoremediation technology, applied in the field of contaminated soil treatment, can solve the problems of high cost of electrochemical repair, loss of nutrients, harsh implementation conditions, etc., and achieve the effects of improving stress resistance, promoting growth, and solving pollution problems

Active Publication Date: 2015-12-23
保合建设工程(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical solidification method can only temporarily fix heavy metals in the soil and reduce heavy metals entering the human body through plants, but it cannot completely remove heavy metals from the soil, and there are hidden dangers; soil leaching method can reduce the availability of heavy metals to plants, but At the same time, a large amount of nutrients will be lost in the soil, and the use of chemical leaching may also lead to acidification or alkalization of the soil; while the cost of electrochemical restoration is relatively high, and the implementation conditions are relatively harsh; and the use of phytoremediation The method is to remove heavy metals from the soil through plant system absorption, accumulation, and volatilization to reduce heavy metal pollution. The cost of this method is relatively low, and it is green and environmentally friendly; Heavy metals are divided into absorbable state, exchange state and refractory state. Heavy metals in a refractory state cannot be absorbed by plants, and different plants have different accumulations of different heavy metals.

Method used

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  • Method for restoring heavy metal contaminated soil through activating agent and microorganism reinforced plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of activator and the method for microorganism strengthening phytoremediation of heavy metal polluted soil, comprise the following steps:

[0034] (1) Add 10kg of activator to the soil in the 1# area, plow the surface soil evenly, and activate it for 10 days;

[0035](2) Inoculate 0.6 kg of composite microorganisms into the activated soil. The Bacillus subtilis, Bacillus licheniformis, yeast and Pseudomonas used in the composite microorganisms are all commercially available products, of which Bacillus subtilis (50 billion cfu / g), Bacillus licheniformis (20 billion cfu / g), yeast (7 billion cfu / g) and Pseudomonas (500 million cfu / g) are mixed at a weight ratio of 2:2:1:0.5, Then plant No. 6 castor-oil castors of Tongbi of 1 cycle, and castor-oil plants adopt seedling planting, and planting time is the middle ten days of a month in March, and planting depth is 20cm, and spacing between plants is 40cm, and row spacing is 50cm, with 1 year as a cycle;

[0036] (3) Re...

Embodiment 2

[0046] A kind of activator and the method for microorganism strengthening phytoremediation of heavy metal polluted soil, comprise the following steps:

[0047] (1) Add 9.2kg of activator to the soil in the 2# area, plow the surface soil evenly, and activate it for 14 days;

[0048] (2) Inoculate 0.8 kg of composite microorganisms in the activated soil. The Bacillus subtilis, Bacillus licheniformis, yeast and Pseudomonas used in the composite microorganisms are all commercially available products, of which Bacillus subtilis (50 billion cfu / g), Bacillus licheniformis (20 billion cfu / g), yeast (7 billion cfu / g) and Pseudomonas (500 million cfu / g) are mixed at a mass ratio of 2:3:2:1, Then plant No. 5 castor-oil castors of Tongbi for 2 cycles, and castor-oil plants adopt seedling planting, and the planting time is the middle ten days of March, and the planting depth is 25cm, plant spacing 38cm, row spacing 54cm, with 1 year as a cycle;

[0049] (3) Remove the castor in step (2) ...

Embodiment 3

[0059] A kind of activator and the method for microorganism strengthening phytoremediation of heavy metal polluted soil, comprise the following steps:

[0060] (1) Add 7.2kg of activator to the soil in the 3# area, plow the surface soil evenly, and activate it for 17 days;

[0061] (2) Inoculate 1 kg of composite microorganisms in the activated soil. The Bacillus subtilis, Bacillus licheniformis, yeast and Pseudomonas used in the composite microorganisms are all commercially available products, of which Bacillus subtilis (50 billion cfu / g), Bacillus licheniformis (20 billion cfu / g), yeast (7 billion cfu / g) and Pseudomonas (500 million cfu / g) are mixed at a weight ratio of 3:3:1:0.5, and then Plant No. 1 Castor Bean for one cycle. The castor is planted with seedlings. The planting time is mid-March, the planting depth is 30cm, the plant spacing is 34cm, and the row spacing is 57cm. One year is a cycle;

[0062] (3) Remove the castor in the step (2) from the soil as a whole, a...

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PUM

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Abstract

The invention provides a method for restoring heavy metal contaminated soil through an activating agent and microorganism reinforced plants. The method includes the following steps that firstly, the activating agent is added to the heavy metal contaminated soil, and the soil is tilled evenly and activated for 10 d to 20 d; secondly, complex microorganisms are inoculated in the activated soil, castor oil plants are planted for 1 to 2 periods, and one year is a period; thirdly, the castor oil plants planted in the second step are completely removed from the soil, the activating agent is added, and the soil is activated for 10 d to 20 d; fourthly, nightshade is planted in the soil activated in the third step for 2 to 3 periods, and one year is a period; fifthly, heavy metal in the castor oil plants obtained in the second step and the nightshade obtained in the third step is recycled; and sixthly, the first step to the fifth step are cycled till the content of the heavy metal in the soil reaches the standard. By the adoption of the method for restoring the heavy metal contaminated soil, the soil can be activated and improved, cost is low, contamination is small, and the heavy metal in the soil is efficiently removed.

Description

technical field [0001] The invention relates to the field of contaminated soil treatment, in particular to a method for remediating heavy metal-contaminated soil with an activator and microorganism-enhanced plants. Background technique [0002] Soil heavy metal pollution is a major ecological and environmental problem faced by human beings. Heavy metals stay in the soil for a long time, are difficult to be degraded by plants and microorganisms, and are easily accumulated in the usable parts of crops and passed on to humans through the food chain, causing serious damage to human health. great harm. The heavy metals that cause soil pollution mainly include As, Cd, Cr, Cu, Hg, Pb, Zn, etc. The main source of soil heavy metal pollution is the waste discharged by human beings in life and industrial and agricultural production, such as domestic sewage and domestic garbage. The infiltration of heavy metals contained in the soil, the abuse of pesticides and fertilizers in agricultu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 马新攀
Owner 保合建设工程(山东)有限公司
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