Method for restoring strontium-contaminated soil through oilseed rape

Abstract

The invention provides a method for restoring strontium-contaminated soil through oilseed rape. The method includes the following steps that the oilseed rape is planted in the strontium-contaminated soil, and the overground part of the oilseed rape is harvested or the whole oilseed rape is moved away from the flowering period of the oilseed rape to the fruiting period of the oilseed rape. According to the method, the restoration and treatment efficiency of the strontium-contaminated soil is high, operation is simple, treatment cost is low, management is convenient, the in-situ restoration effect is good, the method can be used for restoration and treatment of the large-area strontium-contaminated soil, a new choice is provided for removing soil strontium contamination, and high application and popularization value is achieved.

Description

technical field [0001] The invention relates to the technical field of environmental phytoremediation, in particular to a method for remediating strontium-contaminated soil by using rapeseed. Background technique [0002] With the development and utilization of nuclear technology, a large amount of radioactive nuclear waste has entered the environment, causing great radioactive pollution to the ecological environment, especially the soil. Among them, strontium (Sr), as one of the most common nuclear wastes, forms long-term pollution after entering the environment, which is difficult to eliminate. Blood cells, bone cells and skin cells die in large numbers, seriously threatening human health. Therefore, the environmental control of strontium pollution has received widespread attention. [0003] The use of phytoremediation to control soil radioactive pollution is an effective, cheap, and environmentally friendly method, and it is gradually being valued by people. However, at...

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Problems solved by technology

[0003] The use of phytoremediation to control soil radioactive pollution is an effective, cheap, and environmentally friendly method, and it is gradually being valued by people. However, at this stage, there are problems such as fewer super-accumulative plant species, low biomass, and low enrichment rate. [Yu Zeping, Phytoremediation and Utilization of Soil Radionuclide Pollution, Anhui Agricultural Sciences, 3009, 37(13): 6101-6103], resulting in low efficiency of soil radioactive pollution remediation, which limits the use of phytoremediation in remediation and governance Application of Strontium Contaminated Soil

[0004] Rapeseed is the oil crop with the largest sowing area and the widest distribution in my country. Although it is known that rapeseed has a certain ability to enrich soil strontium pollution, existing reports believe that rapeseed has a limited ability to enrich strontium. When the strontium content is 1mmol The above-ground accumulation of strontium in the rapeseed Hoagland nutrient solution is only 0.39mg / g [Zhang Xiaoxue et al., ten kinds of plants are opposite to strontium under hydroponic conditions 88 Sr and 133 Absorption and enrichment of Cs[J], Northern Horticulture 2009(10):65~67], because the soil itself has an adsorption effect on heavy metals, it is relatively difficult for plants to enrich heavy metals in the soil, so the accumulation of rapeseed in the soil Theoretically speaking, it will be very low, and it is difficult to be used in the remediation and treatment of strontium-contaminated soil

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