A kind of remediation method of heavy metal polluted soil

A technology of contaminated soil and remediation method, which is applied in the field of remediation of heavy metal contaminated soil, which can solve the problems of limited remediation rate and soil body damage, and achieve the effect of low remediation cost, best remediation rate and strong safety

Active Publication Date: 2022-04-12
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, biological treatment has been widely used due to its advantages of low cost and no secondary pollution; however, the recovery rate of simple biological treatment is limited, and it is easy to cause damage to soil organisms

Method used

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  • A kind of remediation method of heavy metal polluted soil
  • A kind of remediation method of heavy metal polluted soil
  • A kind of remediation method of heavy metal polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: a kind of restoration method of heavy metal polluted soil, comprises the following steps:

[0028] Step 1: Preparation of Biochar Matrix

[0029] 1) The biomass raw material is pretreated to prepare biomass material powder; wherein, the biomass raw material is specifically made of coconut shell; the pretreatment specifically includes: cleaning the biomass raw material, drying it naturally, crushing and sieving;

[0030] 2) Mix the nutrient sludge with the above-mentioned biomass material powder according to the volume ratio of 1:7, and then add deionized water to it so that the water content of the mixture of nutrient sludge, biomass material powder, and deionized mixture is 20 %; Then granulate to obtain pellet matrix;

[0031] 3) Then modifying the pellet matrix to obtain the modified pellet matrix; wherein, the modification process specifically includes: irradiating the pellet matrix with a radiation dose of 500 kGy for 3 minutes in a magnetic environm...

Embodiment 2

[0039] Embodiment 2: a kind of restoration method of heavy metal polluted soil, comprises the following steps:

[0040] Step 1: Preparation of Biochar Matrix

[0041] 1) The biomass raw material is cleaned, naturally dried, crushed and sieved to prepare biomass material powder; wherein, the biomass raw material is specifically coconut shell;

[0042] 2) Mix the nutrient sludge with the above-mentioned biomass material powder according to the volume ratio of 1:10, and then add deionized water to it so that the water content of the mixture of nutrient sludge, biomass material powder, and deionized mixture is 25 %; Then granulate to obtain pellet matrix;

[0043] 3) Then modifying the pellet matrix to obtain the modified pellet substrate; wherein, the modification process specifically includes: treating the pellet substrate with a radiation dose of 550 kGy for 4 minutes in a magnetic environment;

[0044] 4) Put the modified pellet matrix into a pyrolysis furnace for pyrolysis ...

Embodiment 3

[0051] Embodiment 3: a kind of restoration method of heavy metal polluted soil, comprises the following steps:

[0052] Step 1: Preparation of Biochar Matrix

[0053] 1) The biomass raw material is cleaned, naturally dried, crushed and sieved to prepare biomass material powder; wherein, the biomass raw material is specifically coconut shell;

[0054] 2) Mix the nutrient sludge with the above-mentioned biomass material powder according to the volume ratio of 1:13, and then add deionized water to it so that the water content of the mixture of nutrient sludge, biomass material powder, and deionized mixture is 35% %; Then granulate to obtain pellet matrix;

[0055] 3) Then modifying the pellet matrix to obtain the modified pellet matrix; wherein, the modification process specifically includes: irradiating the pellet matrix with a radiation dose of 650 kGy for 5 minutes in a magnetic environment;

[0056] 4) Put the modified pellet matrix into a pyrolysis furnace for pyrolysis at...

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Abstract

The invention discloses a method for remediating heavy metal-contaminated soil, comprising: preparation of biochar matrix; collection, screening and separation of degrading bacteria; preparation of BC-degrading bacteria: combining biochar matrix and degrading bacteria according to the ratio of 2500 to 5000:1 The mass ratio is fully immersed in deionized water, mechanically stirred for 5-8 minutes to obtain the precipitate, and then the precipitate is dried under the condition of an irradiation dose of 50-80kGy to prepare BC-degrading bacteria; soil treatment The present invention uses modified activated carbon to carry specific degradative bacteria capable of repairing heavy metal-contaminated soil, and realizes the repair of heavy metal-contaminated soil, which has a better repair rate and is more efficient; The transfer of pollutants and the safe treatment in the later stage are realized on the basis of environmental protection, which has the characteristics of low repair cost and strong safety.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal-contaminated soil, and in particular relates to a method for remediation of heavy metal-contaminated soil. Background technique [0002] Soil is the guarantee of human survival. In recent years, with the rapid development of industrialization, soil pollution has become more and more serious. In particular, the pollution and damage caused by heavy metals to the soil. Compared with the pollution of the water environment, the pollution of the soil environment by heavy metals is more difficult to control, and the pollution is more harmful. [0003] At present, there are two main ways to control soil heavy metal pollution: one is to change the form of heavy metals in the soil, make them fixed, and reduce their mobility and bioavailability in the environment; the other is to remove heavy metals from the soil. Around these two governance pathways, respective physical, chemical and bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/10C09K17/40
CPCB09C1/08B09C1/105C09K17/40B09C2101/00
Inventor 陈禧彭香琴雷蕾陈晨陶诗阳姚晓声王炜温勇
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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