Phosphogypsum-based desertification soil conditioner as well as preparation and application methods thereof

The preparation and application of phosphogypsum-based desert soil conditioners have solved the problems of land occupation and environmental pollution caused by phosphogypsum storage, improved the structure of desert soil, realized the resource utilization of phosphogypsum and the ecological restoration of desert soil, and enhanced soil fertility and plant survival rate.

CN122445362APending Publication Date: 2026-07-24SICHUAN ZHENGSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202610570666.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively treat phosphogypsum, resulting in its stockpiling occupying land resources, increasing disposal costs, and posing risks of soluble phosphorus, fluorine, and heavy metal pollution. In addition, desertified soils have loose structures and poor water and fertilizer retention capacity, making permanent ecological restoration difficult.

Method used

A phosphogypsum-based desert soil conditioner is used. Through the synergistic effect of pretreated phosphogypsum powder, humic acid/biochar, calcium-based bentonite, decomposed straw powder, activated trace element liquid, and compound microbial agent, a stable water-stable granular structure is formed, which improves the soil's water and fertilizer retention capacity. Furthermore, the availability of trace elements is enhanced by chelating trace elements with disodium EDTA.

Benefits of technology

It has enabled the large-scale disposal of phosphogypsum and the efficient remediation of desertified soil, reducing environmental risks, improving soil fertility and plant survival rate, and forming a stable soil micro-ecological structure suitable for the growth of psammophytes.

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Abstract

The invention discloses an ardealite-based desertification soil conditioner as well as a preparation method and an application method thereof, and belongs to the technical field of soil conditioners. The preparation method of the modifier comprises the following steps: washing phosphogypsum with water and adjusting the phosphogypsum with a pH regulator to obtain pretreated phosphogypsum; the preparation method comprises the following steps: mixing pretreated phosphogypsum, humic acid and / or biochar, calcium bentonite powder, decomposed straws and the like, spraying an activated trace element solution obtained by chelating EDTA disodium salt and metal inorganic salt, atomizing and granulating by using a bonding water-retaining agent, drying at low temperature, cooling, and spraying compound microorganism bacteria. And an agent. The modifier disclosed by the invention is high in environmental safety and strong in wind erosion resistance, can be used for remarkably reducing the soil bulk density, improving the field moisture capacity and the organic matter content and remarkably improving the survival rate of psammophyte, and is suitable for industrial large-scale production and desertification control popularization.
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