Method for restoring wet land and mud-flat soil polluted by high-concentration cesium

Abstract

The invention discloses a method for restoring wet land and mud-flat soil polluted by high-concentration cesium. The method comprises the steps of transplanting 100 sections of subterraneous stems and roots of alternanthera philoxeroides for each square meter of wet land and mud-flat soil polluted, and keeping more than 80% of water holding capacity in soil fields; harvesting and intensively processing overground parts of the plants when the main stems are about 50cm; in harvesting, reserving 1-2 sections of stubbles so as to be beneficial to regeneration, and harvesting and intensively processing the plants again when the main stems of the seedlings are about 50cm; harvesting the plants for three times in one year, and harvesting for a plurality of years; and applying a compound fertilizer additionally in 15-20 days after the seedlings are transplanted or harvested. According to the method, the operation is simple, the management is convenient, the cost is low, and the restoring effect is good.

Description

technical field [0001] The invention relates to regeneration of polluted soil, in particular to a method for using plants to remediate polluted soil. Background technique [0002] The radionuclides released by nuclear tests or nuclear accidents have attracted widespread attention as the most important potential nuclear pollutants in the environment. On the premise of cost-benefit optimization analysis, the bioremediation technology of radionuclide-contaminated soil has become a research hotspot in recent years. Existing studies have shown that the absorption of radionuclides by most plants is very low, so screening and planting plants with higher enrichment capacity for radionuclides to effectively remove radionuclides in the soil is a good way to prevent contaminated soils. One of the effective methods for soil bioremediation and governance. The most common radioactive pollutants include radionuclides 238 U 40 K. 226 Ra, 210 Po, 131 I. 90 Sr, 89 Sr, 137 Cs, etc., e...

AI Technical Summary

Problems solved by technology

At present, the concentration of cesium pollution is relatively low, generally in the range of 20-40mgCskg-1 soil (Wang Dan et al., patent announcement number: CN101905237A (2010.12.08; Wen Fangping. Sudan grass pair133 Cs and 88Sr Stress Response and Uptake and Accumulation Characteristics. Journal of Radiation Research and Radiation Technology, 2009,27(4):212-217), almost have little effect on plant survival and growth In severe nuclear accidents, the concentration of nuclear pollution is very high, which seriously threatens the survival and growth of plants