Repairing agent for treating alkaline cadmium-contaminated soil and preparation method thereof

A technology of cadmium-contaminated soil and remediation agent, applied in the direction of soil conditioning materials, chemical instruments and methods, applications, etc., can solve the problems of unstable source of raw materials, complex composition of raw materials, high cost, etc., and achieve low repair cost and controllable quality The effect of strong stability and high quality stability
CN108774531AInactive Publication Date: 2018-11-09环保桥(湖南)生态环境工程股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
环保桥(湖南)生态环境工程股份有限公司
Publication Date
2018-11-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of agricultural environment conservation and restoration, in particular to a repairing agent for treating alkaline cadmium-contaminated soil and a preparation method thereof. The preparation method comprises the following steps: weighing blast furnace slag, sepiolite, bentonite and flue gas desulfurization gypsum in proportion, uniformly mixing, addingfulvic acid, and mixing to obtain the repairing agent. The preparation method of the invention has the following advantages: the raw materials are easily available; the operation is simple; the preparation cost of the repairing agent can be controlled within 800 yuan / ton, the dosage per acre is 100-300 kg, the cost of the repairing agent per acre is only 80-240 yuan, and the repairing agent can bewidely promoted and used at large scale. By the principle of multi-dimensional repairing, the activity of cadmium in soil can be reduced through sedimentation, adsorption and complexation, and the upward transfer of cadmium in crops can be inhibited through deposition on the endodermis and formation of -SH (sulfhydryl). The two-pronged approach makes it possible to effectively reduce the contentof cadmium in agricultural products.
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Description

technical field

[0001] The invention relates to the technical field of agricultural environment conservation and restoration, in particular to a restoration agent for treating alkaline cadmium-contaminated soil and a preparation method thereof. Background technique

[0002] In the chemical treatment technology of heavy metal pollution in soil, the in-situ chemical passivation repair technology of passivating heavy metals in soil by applying soil remediation agent has been widely valued for its simplicity, good effect, economical and practical advantages, especially suitable for remediation of large Moderately and slightly polluted farmland soil. At present, there have been a lot of researches on remediation agents for acidic cadmium-contaminated soil, and many products have come out. The raw materials used are mainly alkaline materials, phosphorus-containing materials, clay minerals, iron-manganese oxides and organic materials. However, there is a lack of research on remedi...

Claims

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