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Low-voltage electric field-plant method and system for removing radionuclides/heavy metals from water

A technology of radionuclides and heavy metals, applied in the fields of radioactive purification, radioactive pollutants, biological water/sewage treatment, etc., can solve the secondary pollution of chemical substances such as chelating agents, the technical difficulty requires high genetic ecological safety, and the secondary pollution of water bodies Eutrophication and other problems, to achieve high public acceptance, increase the effect of plant landscape, and improve the effect of restoration efficiency

Active Publication Date: 2021-08-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are also many technologies used to enhance the efficiency of phytoremediation. For example, the use of chelating agents such as EDTA can improve the bioavailability of radionuclides and heavy metals, but it also brings secondary pollution of chemical substances such as chelating agents; the use of transgenic technology to improve plant richness collection capacity, but not only requires high technical difficulty, but also involves the ecological security of genes; there are also horticultural measures such as fertilization or pruning to promote the growth and development of plants to improve the enrichment capacity of nuclides and heavy metals, but it may also bring Secondary pollution and eutrophication of water body

Method used

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  • Low-voltage electric field-plant method and system for removing radionuclides/heavy metals from water
  • Low-voltage electric field-plant method and system for removing radionuclides/heavy metals from water
  • Low-voltage electric field-plant method and system for removing radionuclides/heavy metals from water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] a kind of like figure 1 The shown system using low-voltage electric field-plant joint removal of radionuclides or heavy metals includes a rectangular treatment tank 6 for containing waste water containing radionuclides or heavy metals, and a floating plate 7 is placed on the surface of the water layer of the treatment tank 6. On the floating plate 7 A hole is provided, and a plant colonization basket 4 is placed in the hole, and plants 2 are cultivated in the plant colonization basket 4. The plant colonization basket 4 is made of stainless steel, or it can be made of other materials and wrapped with stainless steel on the outside to form a cathode , insert 4 graphite rods 5 into the water at 4 corners of the treatment tank 6 as anodes, and connect the 4 graphite rods 5 in turn to form an anode ring with connecting wires 3, connect the cathode and the anode, and insert an external power supply1.

[0045] Control the power source 1 to form a low voltage field of 0.2-2V / c...

Embodiment 2

[0050] Low-voltage electric field promotes the absorption and transport of the nuclide strontium (Sr) in water by red amaranth

[0051] Materials and Methods:

[0052] After selecting healthy red amaranth seeds for disinfection, use a plant seedling incubator at 25°C and 80% humidity to sow seedlings on the coconut bran seedling substrate. After 7 days, select robust seedlings and transplant them to plant hydroponics in the plant cultivation room. In the container, 1 / 2 Hogland nutrient solution was used for cultivation. After about 15 days when the plants were in the 3-leaf stage, healthy plants of the same size were selected as test materials.

[0053] Sr(NO 3 ) 2 , artificially prepare 20mM concentration of Sr polluted water. Transplant the plants to be tested into the Sr treatment solution and treat them under different electric field strengths and application time conditions of the electric field every day. The design of the treatment groups is shown in Table 1. Each tr...

Embodiment 3

[0061] Low-voltage electric field promotes the absorption and transport of uranium in water body by water hyacinth hyacinth

[0062] (1) Materials and methods:

[0063] Water hyacinth is collected from the back mountain pond of Southwest University of Science and Technology, and domesticated and cultivated in the greenhouse of Southwest University of Science and Technology, with the temperature controlled at 25-30°C. Seven days after acclimatization, healthy plants with uniform size were selected for experimental treatment. A total of 9 treatment groups, including 0 (control) and 1 to 8 groups, as shown in Table 3. Each treatment group has 3 parallel samples, and each parallel sample is to plant 3 water hyacinths in 15L polluted water body, and the electric field intensity of the applied electric field treatment group is 0.5V / cm, and the time of applying the electric field is from 8 o'clock in the morning to the afternoon every day 16 o'clock. The containers are kept suffic...

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Abstract

The invention discloses a method and system for combined removal of radionuclides / heavy metals using low-voltage electric field-plants. The method includes: placing a floating plate on the surface of a container containing waste water containing radionuclides or heavy metals, and the floating plate is provided with As a cathode plant accommodating device, plants are planted in the device, an inert conductive material is inserted into the waste water in the container as an anode, the cathode and the anode are connected, and an external power supply is applied between the two. The invention utilizes low-voltage electric field and phytoremediation, combines the dual advantages of electrodynamic remediation and phytoremediation, and can significantly improve the remediation efficiency of phytoremediation of radionuclide and heavy metal polluted water bodies. There will be no secondary pollution to the environment and ecological problems due to external application of chemical substances, genetically modified or new chemical substances. It has the advantages of low cost, environmental protection, high public acceptance, and can increase the effect of plant landscape.

Description

technical field [0001] The invention belongs to the field of sewage purification, and in particular relates to a method and system for combined removal of radionuclides / heavy metals by using a low-voltage electric field and plants. Background technique [0002] At present, nuclear technology and nuclear industry have entered a stage of rapid development, but a large amount of radioactive waste will be generated during the development and utilization of nuclear science and technology, which has brought a huge potential threat to the ecological environment. In particular, the radionuclides and heavy metals that enter the water body will have a wider range of damage and a more significant degree due to the strong fluidity of the water body. Moreover, radioactive waste water will cause water and soil pollution after entering the environment, and may enter the human body through various channels, which will also cause great harm to human beings. [0003] The sources of radionucl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/00G21F9/06G21F9/18C02F101/20
CPCC02F3/005C02F3/32C02F2101/006C02F2101/20G21F9/06G21F9/18
Inventor 陈珂罗学刚黄仁华唐运来王丹陈晓明黄林涛杨田
Owner SOUTHWEAT UNIV OF SCI & TECH
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