Adsorption film for synchronously fixing various oxygen-containing negative ions and preparation method thereof

An adsorption film and anion technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of low resolution, low adsorption capacity of adsorption film, short shelf life, etc., and achieve easy control of the preparation process, excellent adsorption performance, The effect of improving the adsorption capacity

Active Publication Date: 2014-03-26
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems of low adsorption capacity, short shelf life and low resolution of the adsorption film obtained by the traditional adsorption film preparation technology, and to provide an adsorption method for synchronously fixing multiple oxygen-containing anions applied to the gradient diffusion film technology. Membrane and its preparation method

Method used

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  • Adsorption film for synchronously fixing various oxygen-containing negative ions and preparation method thereof
  • Adsorption film for synchronously fixing various oxygen-containing negative ions and preparation method thereof
  • Adsorption film for synchronously fixing various oxygen-containing negative ions and preparation method thereof

Examples

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Embodiment 1

[0038] In conjunction with the accompanying drawings, a kind of adsorption membrane (such as figure 2 shown), the adsorption film is a polyacrylamide hydrogel film with zirconium dioxide particles evenly distributed on the surface, and the particle size of the zirconium dioxide particles is ≤0.3 μm. The oxygen-containing anions that can be adsorbed by the adsorption film of this embodiment include acid and sub-acid ions of elements such as phosphorus, vanadium, chromium, arsenic, selenium, molybdenum, antimony, tellurium, tungsten, bismuth, polonium and uranium, and are suitable for water bodies, Adsorption and analysis of various oxyanions in environmental media such as soil and sediment.

[0039] After theoretical analysis and repeated tests, the inventors concluded that if one wants to obtain an adsorption film with high adsorption capacity, long shelf life and high resolution for oxygen-containing anions including phosphorus, it is not only necessary to select a new adsor...

Embodiment 2

[0060] An adsorption film for synchronously immobilizing various oxygen-containing anions and its preparation method in this embodiment are basically the same as in Example 1, the difference is that in this embodiment, in the process of preparing the adsorption film for synchronously immobilizing various oxygen-containing anions :

[0061] In step 1, the cross-linking agent DGT gel cross-linker purchased from the British DGT Research Co., Ltd., the pure water prepared by the Milli-Q pure water machine and the propylene produced by GE Healthcare with a concentration of 40% by mass The amide solution was mixed according to the volume ratio of 1:3.0:2.3 to prepare the gel-making solution. The tetramethyldiethylamine solution whose volume is 1 / 200 of the gel-making solution and the ammonium persulfate solution whose volume is also 1 / 200 of the volume of the gel-making solution are added respectively in the above-mentioned gel-making solution to obtain a mixture solution. The pre...

Embodiment 3

[0068] An adsorption film for synchronously immobilizing various oxygen-containing anions and its preparation method in this embodiment are basically the same as in Example 1, the difference is that in this embodiment, in the process of preparing the adsorption film for synchronously immobilizing various oxygen-containing anions :

[0069] In step 1, the cross-linking agent DGT gel cross-linker purchased from the British DGT Research Co., Ltd., the pure water prepared by the Milli-Q pure water machine and the propylene produced by GE Healthcare with a concentration of 40% by mass The amide solution was mixed according to a volume ratio of 1:3.5:2.8 to prepare a gel-making solution. A tetramethyldiethylamine solution with a volume of 1 / 100 of the gel-making solution and an ammonium persulfate solution with a volume of 1 / 300 of the gel-making solution were added to the above-mentioned gel-making solution to prepare a mixed solution . The prepared mixed solution was then inject...

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Abstract

The invention discloses an adsorption film for synchronously fixing various oxygen-containing negative ions and a preparation method thereof, and belongs to the technical field of gradient diffusion films. The adsorption film is a polyacrylamide hydrophilic gel film with zirconium dioxide particles uniformly distributed on the surface, and the particle size of the zirconium dioxide particles is not more than 0.3 micron. The preparation method of the absorption film comprises the following steps: step 1, preparing the polyacrylamide hydrophilic gel film; step 2, placing the polyacrylamide hydrophilic gel film obtained from the step 1 in a zirconium ion-containing solution for standing; step 3, washing the film obtained from the step 2 by pure water, placing the film in a buffer solution, shaking the film in the buffer solution for 20-60 minutes, taking out, washing by the pure water, and soaking in the pure water for 6-12 hours to obtain the absorption film. The preparation method is simple, few absorption materials are used, the distribution uniformity is good, and the resolution ratio of the gradient diffusion film technology in oxygen-containing negative ion analysis can be remarkably increased.

Description

technical field [0001] The invention relates to the technical field of gradient diffusion films, and more specifically relates to an adsorption film for synchronously immobilizing multiple oxygen-containing anions and a preparation method thereof. Background technique [0002] Elements such as phosphorus, selenium and molybdenum are essential nutrients for plants and animals. Phosphorus, selenium, molybdenum, and vanadium, chromium, arsenic, antimony, tungsten, and uranium ions and oxygen-containing anions are widely present in environmental media such as water, soil, and sediment. The existence of these oxyanions will affect the environmental ecosystem It may even cause certain harm to human health. Reliable and robust sampling and measurement techniques are critical to understanding the environmental behavior and effects of these oxyanions. [0003] Gradient diffusion film technology (Diffusive gradients in thin films, DGT) is an in-situ, non-destructive ion content meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/291B01J20/30
Inventor 罗军管冬兴郑建伦马奇英
Owner NANJING UNIV
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