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Dump leaching restoration system and restoration process of chromium pollution soil

A chromium-contaminated soil and repair system technology, applied in the restoration of contaminated soil, etc., can solve the problems of long infrastructure construction period, unfavorable use of small and medium-sized projects, time-consuming and labor-intensive demolition of structures, etc., to achieve strong engineering applicability and construction The effect of fast speed and avoiding secondary pollution

Inactive Publication Date: 2017-01-25
BEIJING GEOENVIRON ENG & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a heap leaching restoration system and process for the restoration of chromium-contaminated soil, so as to solve the problem that the concrete structures used in the existing soil restoration system need to occupy a large space, the infrastructure construction period is long, the cost is high, and it is not conducive to small and medium-sized After the project is used and repaired, the demolition of the structures will take time, effort and high cost technical problems, and the dust containing chromium pollutants will directly escape into the atmosphere during the soil treatment process, resulting in the decline of air quality

Method used

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  • Dump leaching restoration system and restoration process of chromium pollution soil
  • Dump leaching restoration system and restoration process of chromium pollution soil
  • Dump leaching restoration system and restoration process of chromium pollution soil

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Embodiment Construction

[0034] The content of the present invention will be further explained and illustrated below in conjunction with the accompanying drawings.

[0035] combine figure 2 and image 3 , the heap leaching restoration system of chromium-contaminated soil of the present invention, comprising:

[0036] A heap leach tank, which is constructed from a brick base layer 6 and a concrete surface layer 5 (thickness 5-15cm) covering the brick base layer 6; the heap leach tank includes: a heap leach tank body 10 and an anchor Ditch 8; the anchoring ditch 8 is annular and surrounds the outside of the heap leach tank body 10; wherein, the concrete surface layer 5 of the heap leach tank body 10 is successively laid with an anti-seepage membrane 4 and a geotextile 3, and the anti-seepage membrane 4 (high-density polyethylene film with a thickness of 15cm, bentonite waterproof blanket or composite geomembrane) and geotextile 3 (600g / m 2 The edge of the nonwoven geotextile) protrudes out of the he...

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Abstract

The invention discloses a dump leaching restoration system of chromium pollution soil. The dump leaching restoration system comprises a dump leaching pool, a chromium pollution soil pile body, a spraying pipeline and a covering layer, wherein the dump leaching pool is formed by building a brick built substrate layer and a cement concrete surface layer covering the brick built substrate layer; the dump leaching pool comprises a dump leaching pool body and an anchoring groove; the anchoring groove is in an annular shape, and surrounds the outer side of the dump leaching pool body; an impermeable membrane and geotechnical cloth are sequentially paved on the cement concrete surface layer of the dump leaching pool body; the edges of the impermeable membrane and the geotechnical cloth extend out of the dump leaching pool body and are fixed in the anchoring groove; the chromium pollution soil pile is piled in the dump leaching pool body; the spraying pipeline is used for supplying restoration medicaments and moisture, and is paved on the upper surface of the chromium pollution soil pile body; the covering layer covers the spraying pipeline; the edges of the covering layer the edges of the covering layer extend out of the dump leaching pool body and are fixed in the anchoring groove.

Description

technical field [0001] The invention relates to the field of soil remediation, in particular to an ex-situ heap leaching remediation system and process applicable to chromium-contaminated soil. Background technique [0002] Heavy metal chromium, as an industrial raw material, will have a certain impact on the soil environment during its long-term production and application. Chromium exists mainly in two valence states of trivalent chromium (Cr(III)) and hexavalent chromium (Cr(VI)) in soil. Among them, Cr(III) is an essential trace element for the human body, and it exhibits biological toxicity only at relatively high concentrations. Cr(III) can form stable hydroxides in the pH range of 6-11, and precipitated The form is wrapped on the soil aggregates, and its migration ability in the soil is very weak; while Cr(VI) has strong carcinogenic effect, high solubility in water, strong migration ability, poor adsorption ability of soil aggregates, and easy to follow Water leachi...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 甄胜利吕正勇魏丽方英苗竹冯国杰
Owner BEIJING GEOENVIRON ENG & TECH
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