Method for restoration of high-concentration uranium-polluted soil by water spinach

Abstract

The invention discloses a method for restoration of high-concentration uranium-polluted soil by water spinach. The method provided by the invention comprises the following steps of refining and flatting uranium-polluted soil, applying 3000 to 4000kg of human and animal manure as base fertilizer to the uranium-polluted soil, carrying out accelerating germination of seeds, carrying out sowing according a sowing ratio of 2.0 to 2.5 kilograms per mu, when rattan has length of 40 to 50 centimeters, harvesting stems and leaves on the ground, transferring the stems and the leaves from the uranium-polluted soil, carrying out concentrated treatment on the stems and the leaves, wherein in harvest, stubble has length of 1 to 2 sections so that regeneration is promoted, when regenerated rattan has length of 40 to 50 centimeters, carrying out harvesting again, wherein harvesting frequency per year is in a range of 4 to 5, and carrying out topdressing after each harvesting so that regenerated seedling growth is promoted. The method provided by the invention has the advantages of simple processes, convenient management, low cost and good restoration effects.

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

In the existing tests of screening plants for absorbing and enriching uranium, the amount of soil artificial contamination is between 5 and 100 mgUkg-1 soil (Tang Li, et al. Screening and remediation of uranium-contaminated soil super-accumulating plants Study on the characteristics of accumulation. Nuclear Technology, 2009, 32, (2): 136-141; Xu Jun, et al. Study on the tolerance of three plants to uranium and the difference of uranium absorption and accumulation in soil. Chemical Research and Application, 2009, 21(3 ):322-326), had no significant effect on the germination, emergence and growth of plant seeds