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Adsorption film for synchronously fixing arsenic, antimony and vanadium ions and preparation method of adsorption film

An adsorption film and vanadium ion technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve problems such as easy dissolution, affecting the accuracy of sample analysis, and dissolution of iron film, achieving high Efficient fixed adsorption, simple preparation steps, and high adsorption capacity

Inactive Publication Date: 2019-05-21
NANJING UNIV
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Problems solved by technology

For example, in 2010, Jakob Santner et al. (Santner, et al., Anal. Chem. 2010, 82, 7668-7674) placed a hydrogel film dissolved with iron-based material ferric chloride hexahydrate in a 2- Precipitation reaction in (N-morphineline) ethanesulfonic acid buffer solution prepares iron film with evenly distributed adsorbent, but the iron film prepared by the above precipitation method has a storage time of only 33 days, and the iron film is reduced during the application process. There is a possibility of dissolution under conditions
Another example is Chinese Patent Application No. 201310689076.5, the application date is December 16, 2013, and the invention name is an adsorption membrane for synchronously immobilizing multiple oxygen-containing anions and its preparation method. This application makes a zirconium-based adsorption membrane The preparation method is to prepare a uniformly distributed zirconium film from the zirconium-based material zirconium oxychloride octahydrate by using similar steps; in 2010, Jared G.Panther et al. (J.G.Panther, et al., Environ.Sci.Technol.. 2010,44,9419-9424) made use of titanium-based material titanium dioxide to prepare adsorption membranes, but the above-mentioned titanium-based and zirconium-based adsorption membranes were eluted with a high volume of alkali NaOH (~10mL) after absorbing oxygen-containing anions. Metal ions, then there will be two disadvantages in this way: first, because the instrument for analyzing target ions is inductively coupled plasma mass spectrometry (ICP-MS), and its matrix is ​​nitric acid, so, for samples eluted with alkaline solution , it is necessary to neutralize the lye with nitric acid again before the detection and analysis. If the neutralization is incomplete, it will affect the accuracy of sample analysis; secondly, for the iron film, it is very easy to dissolve under reducing conditions. Phenomenon

Method used

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  • Adsorption film for synchronously fixing arsenic, antimony and vanadium ions and preparation method of adsorption film
  • Adsorption film for synchronously fixing arsenic, antimony and vanadium ions and preparation method of adsorption film
  • Adsorption film for synchronously fixing arsenic, antimony and vanadium ions and preparation method of adsorption film

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Experimental program
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Effect test

Embodiment 1

[0052] In conjunction with the accompanying drawings, a kind of adsorption film for synchronously fixing arsenic, antimony and vanadium ions in this embodiment is as follows: figure 2 as well as image 3 As shown, the adsorption film is a polyacrylamide hydrogel film with lanthanum oxide powder evenly distributed on the surface, and the particle size of the lanthanum oxide powder is about 300 nm. Oxygen-containing anions that can be adsorbed by the adsorption membrane of this embodiment include acid radical ions of elements such as arsenic, antimony, and vanadium, and are suitable for adsorption and analysis of various oxyanions in environmental media such as water, soil, and sediment.

[0053] In this embodiment, the preparation of lanthanum oxide powder: (1) the hexacyclic methyl ammonium bromide (CTAB) of Ag, the distilled water of B mL and the lanthanum chloride hexahydrate (LaCl) of C g 3 ·6H 2 O) according to the ratio of 1:50:2 into the Erlenmeyer flask, magnetically...

Embodiment 2

[0080] An adsorption membrane for synchronously immobilizing pentavalent arsenic, antimony and vanadium ions and its preparation method in this example are basically the same as in Example 1, except that the preparation of the polyacrylamide gel solution will be purchased from DGT Research Limited in the UK The company's cross-linking agent DGT gel cross-linker, MQ water and the acrylamide solution with a mass percent concentration of 40% produced by GE Healthcare are mixed according to the volume ratio of 1:3.0:2.3 to obtain a gel-making solution .

[0081] Preparation of lanthanum oxide powder: (1) Ag hexacyclomethylammonium bromide (CTAB), B mL of distilled water and C g of lanthanum chloride hexahydrate (LaCl 3 ·6H 2 O) according to the ratio of 1:50:2 into the Erlenmeyer flask, magnetically stirred at room temperature, stirred into a uniform transparent solution;

[0082] (2) adding 4.2ml dropwise to the solution gained in (1) is 25% ammoniacal liquor, the pH value of s...

Embodiment 3

[0095] A kind of adsorption film and its preparation method for synchronously immobilizing pentavalent arsenic, antimony and vanadium ions in this embodiment 3 are basically the same as in embodiment 1, the difference is that the preparation of lanthanum oxide powder: (1) hexacyclomethyl ammonium bromide (CTAB), distilled water, and lanthanum chloride hexahydrate (LaCl 3 ·6H 2O) join in the conical flask according to the ratio of mass volume ratio 1:50:2, magnetically stir at room temperature, stir into uniform transparent solution;

[0096] (2) adding 2.7ml dropwise to the solution gained in (1) is 28% ammoniacal liquor, the pH value of solution is adjusted to 8, along with the adding of ammoniacal liquor, solution becomes translucent colloid now, at room temperature under vigorous stirring for 2.5 hours;

[0097] (3) Transfer the solution in (2) to a polytetrafluoroethylene-lined stainless steel automatic casing, seal it and keep it at 80° C. for 24 hours to obtain a white...

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Abstract

The invention discloses an adsorption film for synchronously fixing arsenic, antimony and vanadium ions and a preparation method of the adsorption film and belongs to the technical field of gradient diffusion films. The preparation method comprises the steps of mixing nano lanthanum oxide powder with a polyacrylamide glue preparation solution; sequentially adding an ammonium persulfate solution and a tetramethyl diethylamine solution into the obtained mixed solution; uniformly mixing the mixture; slowly injecting the mixed solution into a gap between two glass plates clamping U-shaped Teflon sheets to remove bubbles between the glass plates; horizontally drying the glass plates and then forming a film body; soaking the film body in pure water to obtain the adsorption film, wherein the nanolanthanum oxide powder is uniformly distributed on the surface of the adsorption film. The adsorption film has the advantages that the preparation process is simple, adsorption materials are easily synthesized, the distribution uniformity of the lanthanum oxide powder is high, and a good adsorption performance is achieved on arsenic, antimony and vanadium ions.

Description

technical field [0001] The invention belongs to the technical field of gradient diffusion films, and more specifically relates to an adsorption film for synchronously fixing arsenic, antimony and vanadium ions and a preparation method thereof. Background technique [0002] Industry is an important pillar industry of my country's national economy, but at the same time, behind the development of industry, it also brings ecological pollution to urban construction and human living environment. Especially in terms of water environment pollution, a large amount of heavy metal elements flow into the water environment, resulting in poor water quality and threatening the safety of drinking water for residents. Therefore, in environmental governance work, the detection of heavy metal ions is a focus of water quality analysis. For example, arsenic (As), antimony (Sb) and vanadium (V) are ubiquitous in the environment, and they have serious toxicity, which will not only cause a series ...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/26B01J20/30B01J20/285C02F1/28C02F101/20
Inventor 罗军李可心刘兆东
Owner NANJING UNIV
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