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System and method for treating soil contaminated with heavy metals

A heavy metal and soil technology, applied in the field of soil pollution control, can solve the problems that clay is difficult to leaching fully and affects the leaching effect, so as to achieve the effects of not being easy to secondary pollution, ensuring the leaching effect, and reducing the treatment cost

Active Publication Date: 2019-05-21
芷兰生态环境建设有限公司
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  • Description
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Problems solved by technology

Existing chemical leaching is divided into in-situ leaching and ex-situ leaching. These two leaching methods have not directly pretreated the soil, and directly poured the eluent onto the contaminated soil, or only passed through Simply crush and then pour the leaching liquid, but due to the influence of soil hydraulic conductivity, soil with low conductivity such as clay is difficult to leaching fully, thus affecting its leaching effect

Method used

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  • System and method for treating soil contaminated with heavy metals
  • System and method for treating soil contaminated with heavy metals
  • System and method for treating soil contaminated with heavy metals

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] as attached Figures 1 to 11 The described soil treatment system polluted by heavy metals comprises a hydraulic conductivity change zone 1, a crushing and stirring device 2 and several leaching and dewatering devices 3, and the crushing and stirring device 2 is connected to the hydraulic conductivity changing zone 1, A number of said rinsing and dehydration devices 3 are respectively connected to the crushing and stirring device 2;

[0039] The hydraulic conductivity change zone 1 includes a water tank layer 101, a coarse stone layer 102, a fine stone layer 103 and a soil placement layer 104, and the water tank layer 101, the coarse stone layer 102, the fine stone layer 103 and the soil placement layer 104 are composed of The top is arranged adjacently in turn, the water tank layer 101 is provided with water inlet pipes and water outlet pipes, and the soil plac...

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Abstract

The invention discloses a system and a method for treating soil contaminated with heavy metals. The system comprises a hydraulic conduction coefficient changing zone, a crushing and stirring device and a plurality of leaching and dehydrating devices, the crushing and stirring device is connected with the hydraulic conduction coefficient changing zone, and the plurality of leaching and dehydratingdevices are respectively connected with the crushing and stirring device; and a plurality of hollow square movable water tanks are arranged in the hydraulic conduction coefficient changing zone at intervals. The system and the method for treating soil contaminated with heavy metals can improve the soil leaching effect by changing the hydraulic conduction coefficient of the contaminated soil.

Description

technical field [0001] The invention relates to the field of soil pollution control, in particular to a soil control system and a treatment method polluted by heavy metals. Background technique [0002] If the amount of heavy metals discharged into the soil is greater than the self-purification capacity of the soil, it will cause soil pollution. Soil polluted by heavy metals will change its own structure, and the microbial activities in the soil will also be inhibited, and finally enter the human body through "soil-plant-human body" or "soil-water-human body", reaching the level of endangering human health . Our country has begun to pay attention to soil pollution and has adopted a series of control measures. [0003] The common methods to control soil pollution include thermodynamic remediation method, thermal desorption remediation technology, incineration method, chemical leaching method, etc. Among them, the chemical washing method refers to the method of removing and...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/02B09C1/08B02C4/00B02C4/42B02C23/14B02C23/16B07B1/28B01F13/10
Inventor 陆炯
Owner 芷兰生态环境建设有限公司
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