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Preparation method of tungstate ion-imprinted ceramic membrane and treatment method of tungsten-containing wastewater

A tungstate ion, ceramic membrane technology, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of easy shedding of imprinted chitosan, long adsorption reaction time and long service life It can achieve the effect of excellent reusable performance, improved environmental protection and economic benefits, and stable structural performance

Active Publication Date: 2018-08-28
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

The above method will adopt the method of surface imprinting to graft imprinted chitosan on Al 2 o 3 surface, increasing the number of binding sites on the surface of the adsorbent, however, the above preparation method deposited on Al 2 o 3 Surface active SiO 2 layer with Al 2 o 3 The surface binding force is weak, the imprinted chitosan on the graft is easy to fall off, the service life is not high, and the adsorption reaction time is too long, which is not conducive to industrial application

Method used

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  • Preparation method of tungstate ion-imprinted ceramic membrane and treatment method of tungsten-containing wastewater
  • Preparation method of tungstate ion-imprinted ceramic membrane and treatment method of tungsten-containing wastewater
  • Preparation method of tungstate ion-imprinted ceramic membrane and treatment method of tungsten-containing wastewater

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Embodiment 1

[0046] 1. Preparation of tungstate ion-imprinted ceramic membrane (IIP-PEI / CM)

[0047] (1) Preparation of a ceramic film co-deposited with polyethylenimine and polydopamine: soak the aluminum oxide ceramic film overnight in acetone, dry it in vacuum at 50° C., soak it in 5% dilute hydrochloric acid for 15 hours, and wash it with deionized water until Vacuum dry at neutral 70°C for later use; prepare a Tris-HCl buffer solution, adjust the pH to 8.5 with dilute hydrochloric acid, dissolve dopamine hydrochloride and polyethyleneimine in the Tris-HCl buffer solution, and mix the dopamine salt in the solution The concentrations of salt and polyethyleneimine were 2g / L and 0.2g / L respectively, and 5mM CuSO 4 with 19.6mM H 2 o 2 Add it as a catalyst to the above mixed solution to prepare a deposition solution, wet the pretreated alumina ceramic membrane with ethanol and immerse it in the deposition solution, react at 50°C for 2 hours in an air atmosphere, and wash it with deionized...

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Abstract

The invention belongs to the technical field of ion imprinting, and particularly relates to a preparation method of a tungstate ion-imprinted ceramic membrane and a treatment method for tungsten-containing wastewater. The preparation method of the tungstate ion-imprinted ceramic membrane comprises the following steps of (1) the preparation method of a codeposition ceramic membrane of polymine andpolydopamine; (2) adsorption reaction between the codeposition ceramic membrane of the polymine and the polydopamine and tungstate ions; (3) immersion of a saturated codeposition ceramic membrane intoan ethanol solution of glutaraldehyde, wherein the vacuum processing is conducted for a predetermined time after the reaction is completed; (4) elution of template ions. The tungstate ion-imprinted ceramic membrane prepared by means of the method not only has high adsorption performance for tungstate ions, but also shows excellent selectivity and ultra-fast adsorption rate, the tungstate ion-imprinted ceramic membrane has stable structural performance, imprinted materials on the surface of the ceramic membrane are uniformly distributed, the combination performance of the imprinted materials and the ceramic membrane is good, the imprinted materials do not easily fall off, and the imprinted ceramic membrane is excellent in recyclability.

Description

technical field [0001] The invention belongs to the technical field of ion imprinting, and in particular relates to a preparation method of a tungstate ion imprinted ceramic membrane and a treatment method for tungsten-containing wastewater. Background technique [0002] Molecular imprinting technology is a technique for preparing template molecules with specific recognition ability, and has attracted extensive attention because of its strong memory and recognition functions for template molecules. Ion imprinting technology has all the advantages of molecular imprinting technology. The holes in the imprinted polymer match the size and shape of template ions, and can specifically recognize template ions. However, common ion imprinted polymers embed template ions too deeply and are not easy to elute. , and due to the deep pores, the diffusion resistance of template ions is relatively large, and the adsorption rate is slow. Surface ion imprinting technology overcomes these def...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28
CPCB01J20/268C02F1/285
Inventor 曾坚贤董志辉郑柏树周虎吕超强曾杰辉马溢昌
Owner HUNAN UNIV OF SCI & TECH
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