On-line water supplementary device and method for maintaining polluted soil electrical restoration efficiency

A technology for electric restoration and polluted soil, applied in the restoration of contaminated soil, etc., can solve problems such as water loss, achieve the effects of reducing repair costs, improving electric or electric-biological restoration efficiency, and strong scalability

Active Publication Date: 2016-09-21
SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of different degrees of water loss in each field strength area of ​​the soil in which the polarity switching electric field is applied during the electrodynamic restorat

Method used

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  • On-line water supplementary device and method for maintaining polluted soil electrical restoration efficiency
  • On-line water supplementary device and method for maintaining polluted soil electrical restoration efficiency
  • On-line water supplementary device and method for maintaining polluted soil electrical restoration efficiency

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Example Embodiment

[0049] Example 1:

[0050] In this embodiment, the online water replenishment device is applied to the electric remediation of petroleum-contaminated soil. The petroleum-contaminated soil configured in the laboratory is used. The soil collected is clean clay to remove visible impurities and roots. The indoor natural air-drying is passed through a 2mm sieve. The oil is extracted from an oil pit of Shuguang Oil Production Plant in Liaohe Oilfield, and is formulated into oil contaminated soil with an oil content of 40g / kg.

[0051] The prepared soil is air-dried naturally for 7 days. After the oil and soil are evenly mixed, the moisture content is adjusted to 25% with deionized water, which is divided into 3 treatments, namely control, electric restoration, and moisture regulation electric restoration, and put them into the soil box. (Length 40cm×Width 40cm×Height 15cm), each soil box is filled with 20kg of test soil.

[0052] Such as image 3 As shown, a 2×2 electrode matrix is ​​arra...

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Abstract

The invention relates to an on-line water supplementary device for maintaining polluted soil electrical restoration efficiency. The on-line water supplementary device comprises a multi-channel peristaltic pump, a liquid separate charging controller, a PLC module group and a host computer which are sequentially connected and a soil conductivity sensor and a soil water sensor which are connected with the PLC module group; and the soil conductivity sensor and the soil water sensor are arranged in the soil. A method comprises the steps that when soil conductivity in each area is lowered to 10% of initial conductivity, the host computer starts the separate charging controller after obtaining the water supplementary amount of each area according to a water-conductivity relation curve; a peristaltic pump first channel module is controlled to supplement water for a high field strength area; and a second channel module and a third channel module are separately controlled to supplement water for a medium field strength area and a low field strength area through electronic flowmeters. According to the on-line water supplementary device, soil water is automatically supplemented based on the relation between the soil water and the conductivity; the polluted soil electrical soil restoration efficiency under an electrical field switching condition is maintained; and the restoration cost is lowered. The on-line water supplementary device can be applied to practical application for large-scale polluted soil electrical and electrical-biological restoration sites.

Description

technical field [0001] The invention belongs to the technical field of electrodynamic restoration of polluted soil, and in particular relates to an online water supply device and method for maintaining the efficiency of electrodynamic restoration of polluted soil. Background technique [0002] The electrokinetic remediation technology of polluted soil is to insert electrodes into polluted soil and apply direct current to form a direct current electric field, which can produce various electrokinetic effects and electrochemical reactions in the soil, including electrodialysis, electromigration, electrophoresis and electrochemical redox reactions, etc. Heavy metals or organic pollutants in the soil can be migrated out of the soil or oxidized / reductively degraded under the action of an electric field. Compared with traditional contaminated soil remediation technology, electric remediation technology has the advantages of being economical, safe, not limited by soil heterogeneity ...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/085B09C1/10
Inventor 郭书海张猛李凤梅吴波李刚王加宁
Owner SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI
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