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

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 ...

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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 restoration process, the present invention provides an electric field moisture control device and method that integrates soil conductivity, real-time monitoring of moisture, and automatic water replenishment

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