| abstract |
The invention provides a treatment method for heavy metal chromium pollution in farmland, and relates to the technical field of heavy metal pollution treatment. The treatment method includes: firstly adjusting the soil pH to 5-6, then adding compound microorganisms and medicinal residues, tilling, then laying a layer of dead leaves on the soil surface, the thickness of the dead leaves is 4-8 cm, the reaction is 15-20 d, and the The soil is sprayed with deionized water, the amount of water is 5-10m 3 /h, sprayed for 20-30min, then the pH of the soil is adjusted to 7-8, then the fixative and adsorbent are added to the soil, and the reaction is performed for 30-40d, every 5-10d Plough the soil once. The treatment method of the invention can significantly reduce the content of hexavalent chromium in the soil through the cooperative action of composite microorganisms, natural products and composite adsorbents, thereby reducing the harm of hexavalent chromium to plants and soil, thereby repairing chromium-contaminated soil and improving soil quality. |