Electric-solidification combined remediation method for heavy metal contaminated soil
A technology of polluted soil and joint restoration, which is applied in the restoration of polluted soil to achieve the effect of overcoming secondary pollution and making up for the disturbance of solidification treatment.
Pending Publication Date: 2022-06-10
TAIYUAN UNIV OF TECH +1
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Problems solved by technology
At present, solidification restoration technology is widely used, but single solidification restoration requires large-scale use of curing agent and water resources to repair polluted soil, which will cause large-scale disturbance of soil. At the same time, traditional single electric restoration technology has high cost and easy to cause secondary Sub-pollution, difficult promotion and other issues
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Embodiment 1
[0032]Equipment connection and operation: The anode uses graphite electrodes, the cathode uses nickel foam, and the electrolyte storage bottle is filled with 1000mL of distilled water, which is introduced into the electrode chamber through a peristaltic pump at a speed of 12ml / min, and the electrolyte in the electrode chamber will be circulated after reaching a certain height Return to the electrolyte storage bottle. Then, the DC voltage gradient was 1V / cm, and the treatment was continued for 72 hours. During the electric restoration process, the current was recorded once every hour by a current recorder. Finally, various index tests are carried out. Use an inductively coupled plasma tester to test the copper concentration of the repaired contaminated soil and solidified soil, and calculate the repair efficiency. The test result shows that the repair efficiency of the electric-curing combined repair technology for copper ions is 94%, and the curing of the S1 area Agent pH is ...
Embodiment 2
Embodiment 3
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The invention belongs to the technical field of soil remediation and solid waste resource utilization, and relates to an electric-solidification combined remediation method for heavy metal contaminated soil. Heavy metal contaminated soil is placed between a cathode chamber and an anode chamber and is electrified for electrokinetic remediation; a curing agent is added into a part of heavy metal contaminated soil adjacent to the cathode chamber; the curing agent comprises the following components in parts by weight: 14-28 parts of red mud and 7-21 parts of fly ash; the method not only makes up for large-area soil solidification treatment disturbance required by a solidification remediation technology, but also can overcome secondary pollution existing in an electrokinetic remediation technology, ensures the remediation efficiency of the heavy metal contaminated soil, and is suitable for in-situ remediation of a heavy metal contaminated site.
Description
technical field [0001] The invention belongs to the technical field of soil remediation and solid waste resource utilization, and relates to an electrodynamic-solidification combined remediation method for heavy metal polluted soil. Background technique [0002] Soil heavy metal pollution refers to human activities, the content of trace metal elements in the soil exceeds the background value, and the excessive content caused by excessive deposition is collectively referred to as soil heavy metal pollution. [0003] Heavy metals refer to metals with a specific gravity equal to or greater than 5.0, such as Fe, Mn, Zn, Cd, Hg, Ni, Co, etc.; they mainly come from pesticides, wastewater, sludge and atmospheric deposition, etc. For example, mercury mainly comes from mercury-containing wastewater, cadmium, Lead pollution mainly comes from smelting emissions and vehicle exhaust deposition, while arsenic is widely used as pesticides, fungicides, rodenticides and herbicides. Excessiv...
Claims
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IPC IPC(8): B09C1/08B09C1/00
CPCB09C1/085B09C1/00B09C2101/00
Inventor 解钧赵文婧冯辉民温旺许婷霏段媛武鹏飞贾立军秦新皓曹德华刘晓凤梅骞崔铭烨周雯婷何斌马晓杰任志远杨婷马富丽韩鹏举董晓强白晓红
Owner TAIYUAN UNIV OF TECH