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Stabilizing material for remediation of soil contaminated by heavy metals and preparation method thereof

A soil remediation and stabilization technology, applied in the field of soil remediation, can solve rare problems and achieve the effect of promoting remediation, improving the remediation effect, and improving the micro-ecological environment

Inactive Publication Date: 2020-02-11
JIANGXI PURUIFENG ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, it is rare to report that bagasse is mostly used as a material for repairing heavy metal soil.

Method used

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  • Stabilizing material for remediation of soil contaminated by heavy metals and preparation method thereof
  • Stabilizing material for remediation of soil contaminated by heavy metals and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A stabilized material for heavy metal soil restoration, comprising the following raw materials in parts by weight: 82 parts of bagasse (dried bagasse), 7 parts of expanded graphite, 22 parts of fly ash, 5 parts of swelling, rotten 5 parts of phytic acid, 2 parts of chitosan.

[0027] The preparation method of the above-mentioned stabilized material for heavy metal soil restoration comprises the following steps:

[0028] (1) Pulverize bagasse (dried bagasse) and pass through a 100-mesh sieve to obtain bagasse powder, then place it in a carbonization furnace, and slowly heat up to 195°C at a rate of 3°C / min under a nitrogen atmosphere , and keep it warm for 25 minutes, then stop heating, then naturally cool down to 85°C under a nitrogen atmosphere, then take out the bagasse powder to obtain semi-carbonized bagasse powder;

[0029] (2) Mix the semi-carbonized bagasse powder, expanded graphite, fly ash, bentonite, humic acid and chitosan obtained in the step (1) uniformly ...

Embodiment 2

[0031] A stabilized material for heavy metal soil restoration, comprising the following raw materials in parts by weight: 85 parts of bagasse, 5 parts of expanded graphite, 20 parts of fly ash, 4 parts of bentonite, 5 parts of peat humic acid, 2.5 parts of chitosan .

[0032] The preparation method of the above-mentioned stabilized material for heavy metal soil restoration comprises the following steps:

[0033] (1) Bagasse is pulverized and passed through a 100-mesh sieve to obtain bagasse powder, which is then placed in a carbonization furnace and slowly heated to 205°C at a rate of 4.5°C / min under a nitrogen atmosphere, kept at a temperature of 25min, and then stopped heating. Naturally lower the temperature to 90°C under a nitrogen atmosphere, and then take out the bagasse powder to obtain semi-carbonized bagasse powder;

[0034] (2) Mix the semi-carbonized bagasse powder, expanded graphite, fly ash, bentonite, humic acid and chitosan obtained in the step (1) uniformly in...

Embodiment 3

[0036] A stabilized material for heavy metal soil restoration, comprising the following raw materials in parts by weight: 75 parts of bagasse, 7 parts of expanded graphite, 18 parts of fly ash, 6 parts of bentonite, 5 parts of peat humic acid, and 2.5 parts of cellulose.

[0037] The preparation method of the above-mentioned stabilized material for heavy metal soil restoration comprises the following steps:

[0038] (1) Bagasse is pulverized and passed through a 100-mesh sieve to obtain bagasse powder, which is then placed in a carbonization furnace and slowly heated to 190°C at a rate of 4°C / min under a nitrogen atmosphere, kept for 28 minutes, and then stopped heating. Then cool down naturally to 85°C under a nitrogen atmosphere, and then take out the bagasse powder to obtain semi-carbonized bagasse powder;

[0039] (2) Mix the semi-carbonized bagasse powder, expanded graphite, fly ash, bentonite, humic acid, and cellulose obtained through step (1) in a stirring tank to obta...

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Abstract

The invention provides a stabilizing material for remediation of soil contaminated by heavy metals and a preparation method thereof. The stabilizing material comprises the following raw materials in parts by weight: 70-90 parts of bagasse, 5-8 parts of expanded graphite, 15-26 parts of fly ash, 3-7 parts of bentonite, 3-6 parts of humic acid and 1.5-3 parts of a natural polymeric flocculant. The preparation method comprises the following steps: (1) crushing and sieving bagasse to obtain bagasse powder, and putting the bagasse powder into a carbonization furnace to prepare semi-carbonized bagasse powder; and (2) uniformly mixing the semi-carbonized bagasse powder, expanded graphite, fly ash, bentonite, humic acid and the natural polymer flocculant in a stirring tank to obtain the stabilizing material. According to the invention, the bagasse is used as a main raw material, so the waste can be turned into the valuable; and the bagasse is matched with other substances, so the prepared stabilizing material has a very good remediation effect on soil contaminated by heavy metals, effectively reduces the leaching concentration of heavy metals in the soil, and effectively improves the physicochemical properties of soil and a micro-ecological environment.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a stabilized material for heavy metal soil remediation and a preparation method thereof. Background technique [0002] Soil is one of the most important natural resources on which all human beings depend for survival, and it is also an important part of the ecological environment system. With the rapid development of the industrial and agricultural economy, the problem of heavy metal pollution in the country's soil has become more and more prominent. Industries that carry a large amount of heavy metal ions, discharge of domestic sewage into rivers, cultivated land, excessive use of agricultural fertilizers, herbicides, etc., disorderly mining of metal mines, smelting of ores, random dumping of industrial solid waste, medical waste and domestic garbage, these All are the chief culprits of the status quo of soil heavy metal pollution. Heavy metals are not easy to be leac...

Claims

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Application Information

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IPC IPC(8): C09K17/00
CPCC09K17/00
Inventor 刘云文阳平
Owner JIANGXI PURUIFENG ECOLOGICAL TECH CO LTD
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