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Method for removing heavy metal in soil

A heavy metal and soil technology, applied in the field of contaminated soil treatment, to achieve good promotion and application value, low energy consumption, and simple operation

Inactive Publication Date: 2012-01-18
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

At present, the commonly used heavy metal-contaminated soil remediation technologies mainly include phytoremediation technology, electric remediation technology and chemical leaching technology. Taking phytoremediation technology as an example, its annual heavy metal removal efficiency is generally only about 10% to 15%. Other remediation technologies There are still some problems in the application of

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  • Method for removing heavy metal in soil
  • Method for removing heavy metal in soil
  • Method for removing heavy metal in soil

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Embodiment Construction

[0027] The technical solutions in the present invention will be clearly and completely described below in conjunction with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] The gist of the present invention is: the heavy metal pollutants in the soil are adsorbed and enriched by high magnetic adsorption materials such as magnetized activated carbon, and then the magnetized activated carbon is collected by magnetic separation, and the heavy metals are moved out of the soil system to realize the removal of the heavy metal pollutants in the soil. heavy metals to purify the soil. This method can be used for the removal of various heavy metals such as cadmium, arsenic, mercury and l...

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Abstract

The invention discloses a method for removing heavy metal in soil, and belongs to the field of polluted soil treatment. The method comprises the following steps: adjusting the water content of the soil to be treated to 8%-12%; uniformly adding a magnetic adsorption material into the soil with adjusted water content, wherein the adding amount of the magnetic adsorption material is 10-50 g per 1 kg of soil; regularly adjusting the water content of the soil after magnetic adsorption material addition, maintaining the water content of the soil to 8%-12%, regularly and uniformly stirring the soil; collecting the magnetic adsorption material in the soil treated by above procedures for a certain period in a manner of magnetic separation so as to complete the removal of heavy metal in the soil. The method has simple operations, can realize high-efficient low-cost treatment of heavy metal-polluted soil, and has the advantages of low energy consumption and environment protection; the method can be combined with common technology of phytoremediation of heavy metal-polluted soil, and has good popularization and application value.

Description

technical field [0001] The invention relates to the field of contaminated soil treatment, in particular to a method for removing heavy metals in soil. Background technique [0002] Soil heavy metal pollution is a typical pollutant type in the soil environment. Its typical representatives, such as cadmium, mercury, lead, and arsenic, are generally characterized by wide distribution, strong concealment, and serious harm. Related soil heavy metal poisoning incidents have occurred repeatedly, such as pain disease, Minamata disease, etc. Therefore, its treatment and removal is the focus of attention and research in the field of environmental soils in recent years. At present, the commonly used heavy metal-contaminated soil remediation technologies mainly include phytoremediation technology, electric remediation technology and chemical leaching technology. Taking phytoremediation technology as an example, its annual heavy metal removal efficiency is generally only about 10% to 15...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 何绪文贾建丽张春晖于妍章丽萍
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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