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Method for increasing the nitrogen removal efficiency of water spinach from water using ion beam irradiation

A technology of ion beam and water spinach, applied in chemical instruments and methods, botany equipment and methods, biological water/sewage treatment, etc., can solve the problems of poor stress resistance, inability to quickly purify eutrophic water bodies, and nitrogen removal efficiency Low-level problems, to achieve the effect of improving the absorption and removal capacity

Inactive Publication Date: 2008-11-19
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of method that utilizes ion beam irradiation to induce water spinach to remove nitrogen in eutrophic water body, to overcome the low removal efficiency of nitrogen in eutrophic water body utilizing aquatic plants in the prior art, Defects of poor stress resistance and inability to quickly purify eutrophic water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] First of all, the selected seeds are plump and uniform, and after the newly harvested Thai willow green water spinach seeds are air-dried, insert and fix them in an irradiation plate with a diameter of 180mm or a petri dish with a diameter of 90mm filled with flower mud. The seed embryo is exposed outside the flower mud so that it can be directly irradiated by ion beams. The low-energy ion beam used for irradiation is produced by the ion beam bioengineering device of the Institute of Plasma Physics, Chinese Academy of Sciences, and the ion implantation type is selected as N + Ion beam, the energy is selected as 25keV, the beam current is 15mA, and the vacuum degree of the target chamber is 10 -3 Pa. Pulse irradiation is adopted, the interval between each pulse is 10s, and the pulse fluence is D 0 =2.6×10 13 ions / cm 2 . The ion implantation dose is selected as 3.9×10 16 ions / cm 2 .

[0011] The artificial simulated eutrophication water body was prepared so that t...

Embodiment 2

[0016] The selected seeds are full and uniform, and the newly harvested Jiangxi Ji'an water spinach variety seeds are air-dried, inserted and fixed in an irradiation plate with a diameter of 180mm or a petri dish with a diameter of 90mm filled with flower mud, and the embryo of the seed is exposed on the flower out of the mud so that it can be directly irradiated with ion beams. The low-energy ion beam used for irradiation is produced by the ion beam bioengineering device of the Institute of Plasma Physics, Chinese Academy of Sciences, and the ion implantation type is selected as N + Ion beam, the energy is selected as 20keV, the beam current is 15mA, and the vacuum degree of the target chamber is 10 -3 Pa. Pulse irradiation is adopted, the interval between each pulse is 10s, and the pulse fluence is D 0 =2.6×10 13 ions / cm 2 . The ion implantation dose is selected as 4.68×10 16 ions / cm 2 .

[0017] The artificial simulated eutrophication water body was prepared so that...

Embodiment 3

[0022] The selected seeds are full and uniform, and the newly harvested white-stalked water spinach seeds are air-dried, inserted and fixed in an irradiation plate with a diameter of 180mm or a petri dish with a diameter of 90mm filled with flower mud, and the embryo of the seed is exposed on the flower out of the mud so that it can be directly irradiated with ion beams. The low-energy ion beam used for irradiation is produced by the ion beam bioengineering device of the Institute of Plasma Physics, Chinese Academy of Sciences, and the ion implantation type is selected as N + Ion beam, the energy is selected as 30keV, the beam current is 15mA, and the vacuum degree of the target chamber is 10 -3 Pa. Pulse irradiation is adopted, the interval between each pulse is 10s, and the pulse fluence is D 0 =2.6×10 13 ions / cm 2 . The ion implantation dose is selected as 3.12×10 16 ions / cm 2 .

[0023] The artificial simulated eutrophication water body was prepared so that the con...

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Abstract

The invention discloses a method for improving the nitrogen removal efficiency of water body in ipomoea aqutica by using the induction mutation of ion beams. The method is characterized in that the embryo parts of the seeds of ipomoea aqutica are exposed outside toward the incidence direction of the ion beams, N ion beams are adopted for irradiation, with the energy of 20-30keV, the impulse fluence of D0 is equal to 2.6*10<13>ions / cm<2>, and the ion injection dosage range of 3.12-6.5*10<16>ions / cm<2>; then the bred seedlings are planted on soilless culture floating carrier with artificial substrate of a floating floor for adaptive culture, and then the seedlings of ipomoea aqutica are uniformly stem-planted with the plant row spacing not smaller than 4cm on the floating plates of the carrier to float on eutrophicated water body for water planting; the total nitrogen removal rate can reach 84.78 to 86.96 percent and the net removal rate is 74.78 to 76.96 percent, which is obviously higher than the removal rate of control groups not receiving ion beam treatment. The method has the advantages of low investment cost and simple treatment process, thereby being used for quick and highly effective repair of eutrophicated water body.

Description

technical field [0001] The invention belongs to the technical field of biological treatment of eutrophic water bodies, and particularly relates to a method for improving the nitrogen removal efficiency of water spinach in eutrophic water bodies by utilizing ion beam irradiation mutagenesis. Background technique [0002] Chinese patent ZL91100234.0 proposes "a method for planting plants on water" based on the characteristics of aquatic plants that need to absorb nutrients for growth, using ecological floating bed cultivation and planting technology, and using environmentally friendly polymer materials as growth supports to fix the carrier and substrate. The water surface plant cultivation technology integrated with modern agronomic measures and ecological engineering technology can plant various suitable aquatic plants in polluted waters with eutrophication as the main body. Adsorption and absorption, enrichment and transformation of nitrogen and phosphorus elements in water,...

Claims

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Application Information

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IPC IPC(8): A01H1/06C02F3/32
Inventor 俞汉青李淼吴跃进郑家传
Owner UNIV OF SCI & TECH OF CHINA
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