Method for restoring and treating high-concentration strontium polluted soil by using utilizing witloof

Abstract

The invention discloses a method for restoring and treating high-concentration strontium polluted soil by using witloof. The method comprises the following steps of: sowing witloof in the high-concentration strontium polluted soil and performing cultivation treatment; when witloof seedlings are 40-50cm high, harvesting aboveground parts and carrying away for performing centralized treatment; leaving stubbles about 4cm high while harvesting; after the regenerated seedlings are 40-50cm high, harvesting again; and harvesting for four times in one year and continuously treating in such a manner for 3-6 years till the content of strontium in soil reaches a safety level. According to the method provided by the invention, the selected plants can normally sprout in the high-concentration strontium polluted soil and are high in growing speed, high in biological yield and high in stress resistance and regeneration capacity, so that the problem of strontium pollution in soil can be permanently solved.

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] Nuclear pollution such as nuclear tests or nuclear accidents is very harmful to the environment. The control of nuclear pollution has attracted widespread attention at home and abroad. Under the comparison of cost and benefit, the use of phytoremediation of nuclear-contaminated soil has attracted great attention. However, many studies have shown that general plants have very little absorption of nuclides. Therefore, it is important to study and screen plants with strong nuclide enrichment capabilities and their planting methods to quickly and effectively remove soil nuclear pollution. important content. Common radioactive pollutants are 90 Sr, 89 Sr, 137 Cs, 238 U 40 K. 226 Ra, 210 Po, 131 I et al., through radioactive pollution phytoremediation technology, can achieve the purpose of remov...

AI Technical Summary

Problems solved by technology

At present, the concentration of strontium pollution is low, generally 20-40mgSrkg-1 soil (Wang Dan et al., patent announcement number: CN101905237A (2010.12.08; 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