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Borrowed-soil remediation method for heavy metal contaminated soil in orchard

A technology of contaminated soil and remediation method, which is applied in the field of remediation of heavy metal-contaminated soil in orchards. It can solve the problems that new soil is easily polluted by old soil and the cost of soil remediation is high, so as to reduce the amount of foreign soil engineering, save excavation and Transportation cost, the effect of reducing the cost of passenger and land

Pending Publication Date: 2019-06-07
四川省生态环境科学研究院
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Problems solved by technology

[0006] Aiming at the above-mentioned prior art, the present invention provides a soil remediation method for heavy metal-contaminated soil in an orchard to solve the problems of high cost of soil remediation and easy pollution of new soil by old soil

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  • Borrowed-soil remediation method for heavy metal contaminated soil in orchard

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Embodiment Construction

[0036] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] This scheme is mainly applicable to fruit forests and other land plots mainly planted with deep root crops such as fruit trees, and it is also applicable to other types of soil plots when conditions permit.

[0038] This type of land restoration technology mainly includes the following steps:

[0039] 1. Trench guest soil operation

[0040] This process is mainly to clean up the original polluted soil, that is, to excavate the original polluted soil of the plot and transport it away. Due to the deep root system of the fruit trees, the cost of foreign soil operation on the whole plot is high, so this scheme adopts trench foreign soil operation. The specific method is:

[0041] (1) Excavate the entire orchard to be treated in a shallow layer, and the excavation depth is 30-50 cm, and the soil that is 30-50 cm thick on the surface o...

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Abstract

The invention discloses a borrowed-soil remediation method for heavy metal contaminated soil in an orchard. The method comprises the steps of trench digging operation, blocking operation, soil covering operation and laying of an irrigation system, wherein the blocking operation is divided into blocking in the circumferential direction and blocking in the vertical direction, and the blocking operation can effectively avoid contact of borrowed-soil new soil with the original contaminated soil and prevent secondary pollution to the borrowed-soil uncontaminated new soil caused by natural or man-made processes such as natural rainfall leaching flushing, seepage, irrigation, underground water surging. The method provided by the invention adopts a manner of digging trenches to remediate the contaminated soil in the orchard, so that the engineering amount of covering of borrowed soil can be reduced, a large amount of excavation and transportation costs are saved, and the method is suitable forremediation of the heavy metal contaminated soil in the orchard; and meanwhile, the irrigation system is laid on the surface of the borrowed soil to effectively induce growth of roots of fruit treesto shallow soil, so that the depth requirement of the borrowed soil is reduced, and the costs of covering of the borrowed soil are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of orchard soil remediation, and in particular relates to a soil remediation method for orchard heavy metal polluted soil. Background technique [0002] As a physical restoration technology for high-concentration contaminated soil, guest-soil technology has been applied in many countries. For example, in Japan’s restoration of cadmium-contaminated farmland in the Shinzugawa area in the 1960s, the main technology used was guest-soil method. [0003] The basic process of the implementation of guest-soil technology is to replace the polluted soil with unpolluted soil to remove the polluted soil or reduce the concentration of pollutants in the soil. Planting crops on the soil after guest soil can effectively reduce the absorption and enrichment of pollutants by crops, thereby ensuring the safety and availability of crops. [0004] The existing alien soil technology does not adopt targeted technical solutions fo...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 雍毅沙涛吴怡侯江黄祥孙永亮刘恒博
Owner 四川省生态环境科学研究院
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