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Remediation material for reducing migration-state lead ions in soil and preparation method thereof

A repair material and lead ion technology, applied in the field of soil repair, can solve the problems of low treatment efficiency in reducing lead ion content, secondary pollution of repair materials, uneven quality, etc., achieve excellent insect resistance, avoid secondary pollution, improve The effect of throughput

Inactive Publication Date: 2020-09-15
代彦霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although common soil remediation methods have good remediation effects, the remediation cost is too high, and the quality of existing heavy metal remediation materials is uneven, and the treatment efficiency for reducing the content of lead ions in the soil is low, and remediation materials have secondary pollution problems.

Method used

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  • Remediation material for reducing migration-state lead ions in soil and preparation method thereof
  • Remediation material for reducing migration-state lead ions in soil and preparation method thereof
  • Remediation material for reducing migration-state lead ions in soil and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A repairing material for reducing mobile lead ions in soil, the preparation method of which comprises the following steps:

[0015] Weigh 68 parts of eggshell powder and place them in a muffle furnace for heat treatment at 500°C for 3 hours. After cooling, transfer the material, 100 parts of polylactic acid, 8 parts of SE-10 emulsifier and 19 parts of ginkgo peel powder to a low-temperature pulverizer. Control the crushing temperature at -20°C, crush and sieve to 100 mesh, transfer the material to the extruder, use the extruder to extrude and granulate at a temperature of 229°C, transfer the material, 180 parts of acetic acid and 145 parts of water to the hydrothermal In the reaction kettle, maintain the hydrothermal reaction temperature at 105°C for 0.5h. The product is washed with water several times, filtered, and dried. Under the ambient pressure of 0.05MPa, the material is impregnated in 21 parts of thiourea and 0.8 parts of polyacrylamide 5% (wt.%) mixed aqueous s...

Embodiment 2

[0017] A repairing material for reducing mobile lead ions in soil, the preparation method of which comprises the following steps:

[0018] Weigh 52 parts of eggshell powder and place it in a muffle furnace for heat treatment at 500°C for 3 hours. After cooling, transfer the material, 100 parts of polylactic acid, 5 parts of SE-10 emulsifier and 15 parts of ginkgo peel powder to a low-temperature pulverizer. Control the crushing temperature at -20°C, crush and sieve to 100 mesh, transfer the material to the extruder, use the extruder to extrude and granulate at a temperature of 216°C, transfer the material, 156 parts of acetic acid and 120 parts of water to the hydrothermal In the reaction kettle, maintain the hydrothermal reaction temperature at 90°C for 1.5 hours. The product is washed with water for many times, filtered, and dried. 5% (wt.%) mixed aqueous solution, control the immersion temperature at 30°C for 3h, and after freeze-drying at -30°C, spray a saturated aqueous s...

Embodiment 3

[0020] A repairing material for reducing mobile lead ions in soil, the preparation method of which comprises the following steps:

[0021] Weigh 85 parts of eggshell powder and place it in a muffle furnace for heat treatment at 500°C for 3 hours. After cooling, transfer the material, 100 parts of polylactic acid, 13 parts of SE-10 emulsifier and 33 parts of ginkgo peel powder to a low-temperature pulverizer. Control the crushing temperature at -20°C, crush and sieve to 100 mesh, transfer the material to the extruder, use the extruder to extrude and granulate at a temperature of 239°C, transfer the material, 210 parts of acetic acid and 165 parts of water to the hydrothermal In the reaction kettle, maintain the hydrothermal reaction temperature at 130°C for 0.2h. The product is washed with water several times, filtered, and dried. 5% (wt.%) mixed aqueous solution, control the immersion temperature at 30°C for 3h, and after freeze-drying at -30°C, spray a saturated aqueous solut...

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Abstract

The invention relates to a remediation material for reducing migration-state lead ions in soil and a preparation method of the remediation material. The remediation material for reducing the migration-state lead ions in the soil is prepared from polylactic acid, eggshell powder, an SE-10 emulsifier, gingko peel powder, acetic acid, water, thiourea, polyacrylamide, ethylenediamine tetraacetic acid,urea, polyvinyl alcohol, nanocellulose and glycine. The remediation material for reducing the migration-state lead ions in the soil, provided by the invention, has excellent performance of reducing the migration-state lead ions in the soil.

Description

technical field [0001] The invention relates to the field of soil repair, in particular to a repair material for reducing mobile lead ions in soil and a preparation method thereof. Background technique [0002] With the application of agricultural chemicals and daily chemicals, the content of heavy metal ions in more and more soils exceeds the standard, which leads to the phenomenon of excessive heavy metal ions in some agricultural products, especially lead ions. Therefore, how to avoid the transfer of lead ions in soil to The problem of pollution control in agricultural products urgently needs to provide feasible solutions. Although common soil remediation methods have good remediation effects, the remediation cost is too high, and the quality of existing heavy metal remediation materials is uneven, and the treatment efficiency for reducing the content of lead ions in the soil is low, and remediation materials have secondary pollution problems. Therefore, soil remediation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 代彦霞
Owner 代彦霞
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