Remediation device and method for extracting heavy metal in soil

A heavy metal extraction technology, applied in the restoration of polluted soil, etc., can solve problems such as difficult reuse, incomplete extraction, long operation time, etc., and achieve the effect of reducing the risk of secondary pollution, efficient extraction, and reducing dosage

Active Publication Date: 2017-09-22
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

But the problem is that the traditional stirring extraction takes a long time, the extraction is not complete, and some high-efficiency extractants (such as chelating reagents, surfactants) are not easy to reuse, and the residue of the extractant in the soil is easy to cause secondary pollution to the environment.

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  • Remediation device and method for extracting heavy metal in soil

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0027] see figure 1 , a restoration device for extracting heavy metals in soil, comprising a soil sample processing system 1, the outlet of the soil sample processing system 1 is connected with an ultrasonic enhanced extraction system 2, the mud outlet of the ultrasonic enhanced extraction system 2 is connected with a mud-water separation system 4, and the ultrasonic The outlet of the enhanced extraction system 2 is connected to the extract solution treatment and reuse system 3, and the recovered water of the mud-water separation system 4 is connected to the inlet of the extract solution treatment and reuse system 3, and the recovered water of the extract solution treatment and reuse system 3 is connected to The water inlet of ultrasonic enhanced extraction system 2.

[0028] Soil sample processing system 1 comprises soil sample pulverizer 5, and the outlet end of so...

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Abstract

The invention discloses a remediation device for extracting heavy metal in soil. The remediation device comprises a soil sample treatment system. An outlet of the soil sample treatment system is connected with an ultrasonic reinforced extracting system, a mud outlet of the ultrasonic reinforced extracting system is connected with a mud-water separating system, a water outlet of the ultrasonic reinforced extracting system is connected with an extraction liquid treatment recycling system, recovered water of the mud-water separating system is connected to an inlet of the extraction liquid treatment recycling system, and recovered water of the extraction liquid treatment recycling system is connected to a water inlet of the ultrasonic reinforced extracting system. The remediation device can efficiently extract the heavy metal in the soil and can also conveniently recover and utilize an extracting agent, the remediation cost is reduced, and the secondary pollution of the environment is reduced.

Description

technical field [0001] The invention belongs to the field of restoration of soil heavy metal pollution, and in particular relates to a restoration device and method for extracting heavy metals in soil. Background technique [0002] Soil is one of the most important natural resources for human survival and development. With the development of human society and economy, soil pollution in our country is becoming more and more serious due to atmospheric dry and wet deposition, sewage irrigation and extensive use of pesticides and fertilizers. According to the official report of the Ministry of Environmental Protection, about 1 / 5 of my country's cultivated land is polluted to varying degrees, among which cadmium is one of the main pollutants. Soil pollution has seriously threatened national food security. If it is not properly controlled, pollutants will be transmitted through the food chain and have a huge impact on human health. In 2015, the State Council issued the "Soil Pol...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/02B09C1/08
CPCB09C1/02B09C1/08Y02P10/20
Inventor 郭军康徐慧荟任心豪贾红磊魏婷花莉周冉
Owner SHAANXI UNIV OF SCI & TECH
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