67 results about "Uranium tailings" patented technology

The invention relates to a preparation method of biomass charcoal-based magnetic activated sludge and application of the biomass charcoal-based magnetic activated sludge to uranium-bearing wastewater treatment. The preparation method of the biomass charcoal-based magnetic activated sludge and application of the biomass charcoal-based magnetic activated sludge to uranium-bearing wastewater treatment have the advantages that the biomass charcoal-based magnetic activated sludge high in porosity, large in specific surface area, few in macroscopic defects and stable in structure is mainly prepared from cheap natural resource biomass, waste beer yeast mycelia, activated sludge of sewage treatment plants and starch and is applied to remove uranium from low-concentration uranium-bearing wastewater; the biomass charcoal-based magnetic activated sludge is free from toxicity and pollution to the environment, so that natural resource recycling is achieved; the preparation method is simple and mild in reaction condition, and the biomass charcoal-based magnetic activated sludge can enable the concentration of the uranium of the low-concentration uranium-bearing wastewater to be decreased from 0.45-0.50mg / L to be below the national discharge standard of 0.05mg / L, thereby being suitable for environmental modification of various low-concentration uranium-polluted water bodies such as the uranium-bearing wastewater produced by uranium mines and uranium hydrometallurgy plants as well as uranium ore and uranium tailing pond lixivia.

The invention relates to a method for remediating uranium-contaminated soil by virtue of woody plants. The method for remediating the uranium-contaminated soil by virtue of the woody plants specifically comprises the following steps: branches of American bamboo-willow No. 3 are directly cut in the uranium-contaminated soil, and survive and grow, the American bamboo-willow No. 3 absorbs uranium in the soil into the own bodies of the plants during a growth process and transfers uranium to overground parts, and the overground parts are harvested and subjected to centralized treatment, so that uranium in the uranium-contaminated soil is reduced; and meanwhile, lots of uranium can also be fixed in roots of the American bamboo-willow No. 3, so that migration and diffusion of uranium are reduced. The method is applicable to remediation for uranium-contaminated soil in the peripheries of places such as uranium mines, uranium hydrometallurgical plants, uranium waste-rock yards and uranium tailing reservoirs.

The invention relates to a preparation method of an electrophilic microbial preparation and application of the electrophilic microbial preparation in treatment of uranium-containing wastewater. According to the preparation method of the electrophilic microbial preparation, a microbial strain and a surface active agent are used, and leifsonia polyphosphate is adopted as the microbial strain; the method comprises the steps of screening and purifying soil around an uranium tailings pond to obtain native leifsonia, culturing the native leifsonia for a logarithmic phase and then inoculating the cultured native leifsonia into a fermentation tank, adding an anionic surfactant, and adjusting the content of the anionic surfactant to 8-10% so as to obtain the electrophilic microbial preparation. Theinvention provides the microbial preparation which is green, cheap and practical and can be used for in-situ treatment and recovery of uranium in the uranium-containing wastewater. The electrophilicmicrobial preparation can effectively enhance the electrotaxis of microorganism and increase the uranium recovery efficiency.

The invention discloses a method for detecting Bidens maximowicziana Oett uranium pollution by taking an arabidopsis oligonucleotide fragment as a probe, comprising the steps of: hybridizing the total RNA (Ribose Nucleic Acid) extracted from the Bidens maximowicziana Oett in a uranium tailing area and a non-polluted contrast area with a 29KArabidopsis Genome Array chip to determine a specifically expressed up-regulated gene as the probe for detecting the uranium pollution; and hybridizing the total RNA extracted from the Bidens maximowicziana Oett in an environment to be detected and the non-polluted contrast area with the 29KArabidopsis Genome Array chip to detect whether a specifically expressed arabidopsis isogenous up-regulated gene exists or not, so as to know whether the Bidens maximowicziana Oett in the environment to be detected is polluted by the uranium or not. The detection method can perform safe detection far away from the polluted environment, solve the problem that the uranium pollution in the environment around the polluted area is difficult to detect correctly as well as correctly determine the pollution source and whether the environment is polluted or not, and has high sensitivity and undivided specificity of aiming at the uranium pollution only.

The invention relates to a method for preventing and controlling migration of heavy metal pollutants in uranium tailings by plants. Five plants, namely Rhus chinensis, Trema orientalis, Buddleja officinalis, Melilotus officinalis and Pouzolzia zeylanica which have strong drought resistance and can retain different heavy metals are planted in a matching way, and applied with plant carbon and phosphate fertilizer at the same time so as to establish vegetation in a uranium tailings polluting area in a short time. Through reestablishment of the vegetation, the nitrogen content of the polluted soil is obviously increased, and the contents of the water-soluble heavy metals such as uranium are obviously reduced. The plants selected by the method are all planted locally, so the materials are easily taken, and the plants are easily planted and quickly grown; moreover, the method has the advantages of having good efficiency for controlling pollution, improving the soil, beautifying the environment, and the like. The method can be used for controlling heavy metal pollution and reestablishing vegetation of various mine degraded ecosystems.

The invention belongs to the technical field of uranium tailings pond safety, and specifically discloses a vacuum pre-compression water-drainage consolidation method for uranium tailings mud, which improves safety of a tailings pond; and according to construction effect detection, shear strength of a vacuum pre-compressed tailings mud cross plate and bearing force of a site foundation are remarkably improved. The method provided by the invention can prevent a governed tailings pond beach face from long-term uneven settlement, effectively reduces water percolating capacity of a tailings pond dam body, reduces water seepage treatment cost of the tailings pond dam body, and shortens a period. The treatment cost of the vacuum pre-compression water-drainage consolidation method can be saved once or more in comparison with that of methods such as a surcharge preloading method, and safety is high. The construction process is simple, is low in requirements on equipment, is low in cost, and caneffectively improve long-term stability of the tailings pond. The vacuum pre-compression water-drainage consolidation method is wide in range of application, is suitable for the uranium tailings pond, and also can be applied to treatment of other mine tailings mud.