A system and method for stabilizing and remediating arsenic-contaminated soil with electric assisted leaching

An electric-assisted, arsenic-polluted technology, applied in the field of soil remediation, can solve the problems of reduced electrical permeability, low arsenic removal rate, soil acidification, etc., and achieve the effect of improving removal efficiency, avoiding secondary pollution, and efficient restoration

Active Publication Date: 2022-05-03
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Abstract
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  • Claims
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Problems solved by technology

However, electrodynamic remediation technology has problems such as the decrease of electric permeability with the expansion of pH difference near the electrode, low arsenic removal rate and serious soil acidification after treatment.

Method used

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  • A system and method for stabilizing and remediating arsenic-contaminated soil with electric assisted leaching
  • A system and method for stabilizing and remediating arsenic-contaminated soil with electric assisted leaching
  • A system and method for stabilizing and remediating arsenic-contaminated soil with electric assisted leaching

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Embodiment Construction

[0041] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. In the following detailed description, for convenience of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It will be apparent, however, that one or more embodiments may be practiced without these specific details. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0042] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. The terms "comprising", "comprising" and the like as used herein indicate the presence o...

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Abstract

The disclosure relates to the technical field of soil remediation, and provides a system and method for stabilizing and remediating arsenic-contaminated soil with electric assisted leaching. The system includes: electrode assembly, eluent storage tank, stabilizer storage tank and liquid collection device. The electrode assembly includes cathode electrode tubes and anode electrode tubes. The anode electrode tubes are arranged as a double-layer ring electrode with the cathode electrode tube as the center. array; eluent storage tank, communicated with the outer ring electrode of the double-layer annular electrode array through the first suction pump, and the eluent in the eluent storage tank is injected into the soil polluted by arsenic through the outer ring electrode The stabilizer storage tank is connected to the inner ring electrode of the double-layer annular electrode array through the second suction pump, and the stabilizer in the stabilizer storage tank is injected into the soil polluted by arsenic through the inner ring electrode; the liquid collection device , communicate with the cathode electrode tube through the third suction pump, and pump the arsenic-containing solution near the cathode electrode tube in the soil into the liquid collection device. Utilizing the present disclosure, efficient removal and remediation of arsenic contamination is achieved.

Description

technical field [0001] The present disclosure relates to the technical field of soil remediation, in particular to a system and method for stabilizing and remediating arsenic-contaminated soil by electric-assisted leaching. Background technique [0002] According to my country's "National Soil Pollution Survey Bulletin", arsenic is a metalloid that is commonly found in my country's soil with a serious content exceeding the standard. Because its valence state is easy to change, it can generate substances with different degrees of toxicity, seriously pollute the soil, and finally enter the food chain through different media, threatening human health and the ecological environment. [0003] Because arsenic can accumulate in soil for a long time and is not easily degraded by microorganisms and chemical methods, it is difficult to remediate arsenic-contaminated soil. At present, stabilization technology, solidification technology, soil leaching technology and electrodynamic reme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/02B09C1/08
Inventor 袁冬海熊思宇李新宇梁明欣寇莹莹
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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