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Process for treating heavy metal contaminated soil

A technology that pollutes soil and heavy metals, applied in the field of soil pollution control, can solve problems that threaten people's health and property safety, restrict sustainable economic development, destroy the ecological environment, etc., and achieve the effect of abundant raw materials, low price and simple process

Active Publication Date: 2013-09-11
JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, China has also paid a heavy price. Energy consumption and industrial and agricultural production activities have seriously damaged China's ecological environment. Air pollution, water pollution, soil and groundwater pollution threaten people's health and property safety, and also restrict China's environmental protection. further sustainable development of the economy

Method used

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  • Process for treating heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A process for remediating heavy metal-contaminated soil containing nickel, zinc, arsenic, lead, and copper, the remediation of heavy metal-contaminated soil has the following specific steps,

[0031] a. Select 500g of the heavy metal-contaminated soil to be repaired from the above-mentioned polluted site, air-dry, grind and crush the heavy metal-contaminated soil to be repaired, and then sieve it with a 20-mesh nylon sieve;

[0032] b. Add 25g of calcium oxide to the heavy metal-contaminated soil to be repaired and mix it. After mixing evenly, place it for maintenance for 12 hours;

[0033] c. Continue to add 10g of apatite and 5g of calcium sulfide to the mixed heavy metal-contaminated soil to be repaired, stir evenly and place it for curing for 36 hours;

[0034] d. Continue to add 20g of cement to the heavy metal-contaminated soil to be repaired, place it after being evenly stirred, and continue to maintain it for 24 hours;

[0035] e. Sampling and testing the heavy...

Embodiment 2

[0041] A process for remediating heavy metal-contaminated soil containing nickel, zinc, arsenic, lead, and copper, the remediation of heavy metal-contaminated soil has the following specific steps,

[0042] a. Select 500g of the heavy metal-contaminated soil to be repaired from the above-mentioned polluted site, air-dry, grind and crush the heavy metal-contaminated soil to be repaired, and then sieve it with a 20-mesh nylon sieve;

[0043] b. Add 15g of calcium oxide to the heavy metal-contaminated soil to be repaired and mix it. After mixing evenly, place it for maintenance for 12 hours;

[0044] c. Continue to add 5g of apatite and 10g of calcium sulfide to the mixed heavy metal-contaminated soil to be repaired, stir evenly and place it for maintenance for 36 hours;

[0045] d. Continue to add 15g of cement to the heavy metal-contaminated soil to be repaired, place it after being evenly stirred, and continue to maintain it for 24 hours;

[0046] e. Sampling and testing the ...

Embodiment 3

[0051] A process for remediating heavy metal-contaminated soil containing nickel, zinc, arsenic, lead, and copper, the remediation of heavy metal-contaminated soil has the following specific steps,

[0052] a. Select 500g of the heavy metal-contaminated soil to be repaired from the above-mentioned polluted site, air-dry, grind and crush the heavy metal-contaminated soil to be repaired, and then sieve it with a 20-mesh nylon sieve;

[0053] b. Add 25g of magnesia to the heavy metal-contaminated soil to be repaired and mix it. After mixing evenly, place it for maintenance for 12 hours;

[0054] c. Continue to add 10g of apatite and 5g of calcium sulfide to the mixed heavy metal-contaminated soil to be repaired, stir evenly and place it for 48 hours of maintenance;

[0055] d. Continue to add 35g of cement to the heavy metal-contaminated soil to be repaired, place it after being evenly stirred, and continue to maintain it for 18 hours;

[0056] e. Sampling and testing the heavy ...

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Abstract

The invention relates to a process for treating heavy metal contaminated soil, and is used for restoring the heavy metal contaminated soil containing nickel, zinc, arsenic, lead and copper. The method comprises the following steps of: adding a pH regulator into the heavy metal contaminated soil to be restored; adding apatite and sulfides into the mixed heavy metal contaminated soil to be restored; adding a curing agent into the heavy metal contaminated soil to be restored; evenly stirring and standing; and continuously maintaining. According to the process, the pH regulator is added into the heavy metal contaminated soil, so that the pH value of the soil is increased, and preparations are made for the subsequent stabilization and solidification of the heavy metal pollution soil; then the apatite and the sulfides are added, so that the soil is stabilized effectively; and finally, the curing agent is added, so that the heavy metals in the soil are stabilized effectively, and therefore, the content of the heavy metals in the soil reaches the leaching standard.

Description

technical field [0001] The invention relates to the field of soil pollution control, in particular, the invention relates to a process for repairing heavy metal-contaminated soil containing nickel, zinc, arsenic, lead and copper. Background technique [0002] Nearly three decades of economic growth, industrialization, and urbanization have brought great material wealth to China and greatly improved people's living standards. However, China has also paid a heavy price. Energy consumption and industrial and agricultural production activities have seriously damaged China's ecological environment. Air pollution, water pollution, soil and groundwater pollution threaten people's health and property safety, and also restrict China's environmental protection. sustainable economic development. In recent years, soil and groundwater pollution have received great attention, so there is an urgent need to research and develop remediation technologies that meet my country's national condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/00
Inventor 冯双剑
Owner JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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