Device and method for washing and electrokinetic-combined remediation of heavy metal contaminated soil

A technology of polluted soil and electric remediation, applied in the restoration of polluted soil and other directions, can solve problems such as affecting the remediation effect, and achieve the effect of reducing the amount of use, reducing the risk of leaching, and strengthening the effect of leaching and remediation.

Active Publication Date: 2015-08-26
江苏省环境工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current electric repair technology has the problem

Method used

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  • Device and method for washing and electrokinetic-combined remediation of heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Depend on figure 1 It can be seen that the electric combined restoration device for washing heavy metal contaminated soil of the present invention comprises the following: a washing system and an electric restoration system;

[0037] The leaching system includes a leaching liquid storage tank 1, a first peristaltic pump 2, a mixer 3, an acid storage tank 4, a second peristaltic pump 5, an alkali storage tank 6, a third peristaltic pump 7 and a contaminated soil storage tank 8 Wherein, the eluent storage tank 1, the acid storage tank 4, and the alkali storage tank 6 communicate with the polluted soil storage tank 8 through the first peristaltic pump 2, the second peristaltic pump 5 and the third peristaltic pump 7 respectively; A mixer 3 is arranged inside the storage tank 1;

[0038]The electrokinetic restoration system includes an anode electrode 10, a cathode electrode 11, an anolyte storage tank 12, a fourth peristaltic pump 13, a stirring device 14, an anode chambe...

Embodiment 2

[0041] Utilize the device of embodiment 1 to carry out the method for the leaching electric combined repair of heavy metal polluted soil, this method comprises the steps:

[0042] (a) The heavy metal contaminated soil is placed in the contaminated soil storage tank 8, and the acid solution or alkali solution in the acid storage tank 4 or the alkali storage tank 6 is added to the contaminated soil storage tank by the second peristaltic pump 5 or the third peristaltic pump 7 respectively. In the tank 8, the mixer 3 is turned on for continuous stirring, so that the pH of the soil in the contaminated soil storage tank 8 is uniform;

[0043] (b) Add the eluent in the eluent storage tank 1 to the contaminated soil storage tank 8 through the first peristaltic pump 2, keep the mixer 3 for continuous stirring, and fully mix the soil in the contaminated soil storage tank 8 with the eluent Evenly, to ensure that the heavy metal components fully react with the eluent to form complexes and...

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PUM

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Abstract

The invention discloses a device and a method for washing and electrokinetic-combined remediation of heavy metal contaminated soil. The device comprises a washing system and an electrokinetic remediation system, wherein in the washing system, a leacheate storage tank, an acid storage tank and an alkali storage tank are communicated with a contaminated soil storage trough through a first peristaltic pump, a second peristaltic pump and a third peristaltic pump respectively; a stirrer is arranged in the leacheate storage tank; in the electrokinetic remediation system, an anode chamber and a cathode chamber are arranged on two sides of an electrokinetic remediation chamber, respectively; stirring devices are arranged in the anode chamber and the cathode chamber; a cathode of a DC power supply is connected with a cathode electrode arranged in the cathode chamber, and an anode of the DC power supply is connected with an anode electrode arranged in the anode chamber; an anolyte storage tank is communicated with the anode chamber through a fourth peristaltic pump and a fifth peristaltic pump, so as to form a loop; a catholyte storage tank is communicated with the cathode chamber through a sixth peristaltic pump and a seventh peristaltic pump, so as to form a loop; the bottom of the contaminated soil storage trough in the washing system is communicated with the electrokinetic remediation chamber through a mud pump.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a combined leaching electric repair device and method for heavy metal polluted soil. Background technique [0002] Soil is the foundation of food and clothing for human beings to survive. With the development of society and industry, the soil environment is being seriously polluted, including heavy metal pollution, organic pollution and other pollution. In 2014, the "National Soil Pollution Survey Bulletin" jointly issued by the Ministry of Environmental Protection and the Ministry of Land and Resources showed that the overall situation of my country's soil environment is not optimistic, and some areas have serious soil pollution, the most serious being heavy metal pollution, followed by organic pollution. Heavy metals are concealed, accumulated, regional, long-term, non-degradable, and cause groundwater pollution in soil, which seriously threatens h...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/02
Inventor 王水丁亮曲常胜王栋李冰吴海锁朱迟江野立孙一宁
Owner 江苏省环境工程技术有限公司
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