Combined remediation method of compound polluted soil with straw

A technology of combined restoration of contaminated soil, applied in the restoration of contaminated soil, etc., can solve the problems of low restoration efficiency, slow corrosion rate, unsatisfactory effect, etc., and achieve the effect of enhancing restoration effect, reducing distance, and obvious restoration effect

Active Publication Date: 2021-08-13
INST OF SOIL FERTILIZER & ENVIRONMENT RESOURCE HEILONGJIANG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a joint restoration method of composite polluted soil by using straw, which can solve the problems of low restoration efficiency and unsatisfactory effect of slow decay rate of traditional restoration methods

Method used

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  • Combined remediation method of compound polluted soil with straw
  • Combined remediation method of compound polluted soil with straw
  • Combined remediation method of compound polluted soil with straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Test of the influence of the amount of plant stalks on the effect of remediation of contaminated soil:

[0031] 1) After the contaminated soil is loosened by a soil ripper, eight parts of the same quality soil are weighed by an electronic scale and put into a petri dish, and the weight of each part of soil is set to 2Kg;

[0032] 2) Crush the plant straw with a crusher, add 0g, 100g, 200g, 300g, 400g, 500g, 600g, and 700g of straw to the eight soil samples, and stir evenly, and then evenly spray various decomposing enzymes, each Live microorganisms make the straw decompose quickly;

[0033] 3) Place the petri dish in an artificial climate box at 25 degrees Celsius, spray a certain amount of distilled water into the petri dish, so that the soil moisture content is always maintained, spray once a day, and spray continuously for a week. After the end, let the soil dry naturally , for the determination and analysis of heavy metal content and pH value;

[0034] ...

Embodiment 2

[0040] Example 2: Influence test of plant straw decay diffusion rate on contaminated soil remediation effect:

[0041] 1) After the contaminated soil is loosened by a soil ripper, four parts of the same quality soil are weighed by an electronic scale and put into a petri dish, and the weight of each part of soil is set to 2Kg;

[0042] 2) The plant straw is crushed by a crusher, and a layer of straw with a layer height of 6mm is laid in the four soil samples, and then various decomposing enzymes and various microorganisms are evenly sprayed, so that the straw can be quickly decomposed;

[0043] 3) Place the petri dish in an artificial climate box at 25 degrees Celsius, spray a certain amount of distilled water into the petri dish, so that the soil moisture is always maintained, spray once a day, and spray the four soil samples continuously for one week, two weeks, Three weeks, four weeks, after the end, the soil is naturally dried, and the heavy metal content and pH value are ...

Embodiment 3

[0051] The joint restoration method of composite polluted soil using straws of the present invention comprises the following steps: S1: crushing plant straws with a crusher; S2: mixing the crushed plant straws with compound fertilizers, the mixing ratio is set to 3: 1; S3: After the polluted soil is loosened by a scarifier, a certain amount of polluted soil samples are taken out to measure the pH value and heavy metal content; S4: The plant straw mixed with fertilizer is evenly sprinkled on the surface of the polluted soil, According to the PH value and the content of heavy metals, select the appropriate surface thickness; S5: mix the plant straw with the polluted soil through the soil scarifier, so that the straw is turned into the inner layer of the soil, and then dig the soil out of the grid-like groove; S6: Sprinkle the straw mixed with fertilizer evenly into the trench, fill up the trench, and then cover the surface of the polluted soil with a layer of straw, the thickness...

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Abstract

The invention discloses a method for combined restoration of composite polluted soil by utilizing straws. The combined restoration method comprises the following steps: crushing plant straws through a crusher; mixing the crushed plant straws with compound fertilizers, and setting the mixing ratio The ratio is 3:1; after the contaminated soil is loosened by a scarifier, a certain amount of contaminated soil samples are taken out to measure the pH value and heavy metal content; the plant straw mixed with fertilizer is evenly sprinkled on the surface of the contaminated soil, and the content of heavy metals, select the appropriate surface thickness; mix the plant straw with the polluted soil through a scarifier, so that the straw is turned into the inner layer of the soil, and then the soil is dug out of the grid-like trenches. The present invention solves the problems of low restoration efficiency and unsatisfactory effect of slow decay rate in the combined restoration of the traditional straw in the combined restoration of compound polluted soil by arranging grid-shaped grooves, an upper layer of straw and a lower layer of straw.

Description

technical field [0001] The invention relates to the technical field of plant-microbe combined ecological restoration, in particular to a method for combined restoration of complex polluted soil by using straw. Background technique [0002] With the increasing pollution of soil heavy metals, heavy metals enter the environment through various channels, posing a potential threat to the ecological environment and human survival. At present, the phenomenon of heavy metal pollution in my country's agricultural environment has been very serious. At present, the method used more in the treatment of heavy metal contaminated soil is to change the chemical properties of the soil by adding foreign substances, such as phosphate, lime, silicate, etc., but After these substances are added to the soil for a long time, it is easy to cause soil compaction and have an adverse impact on soil ecology. Straw is the general term for the stems and leaves of mature crops, usually referring to wheat, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
CPCB09C1/10
Inventor 郝小雨马星竹迟凤琴李林周宝库张喜林李伟群刘颖张明怡常本超
Owner INST OF SOIL FERTILIZER & ENVIRONMENT RESOURCE HEILONGJIANG ACADEMY OF AGRI SCI
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