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Hydrogel microspheres for adsorbing heavy metal arsenic and preparation method thereof

A technology for hydrogel microspheres and heavy metal adsorption, which is applied in the fields of adsorption water/sewage treatment, alkali metal compounds, chemical instruments and methods, etc., to achieve the effects of low price, wide molecular weight distribution and rich source of raw materials

Inactive Publication Date: 2018-10-12
ZHEJIANG OCEAN UNIV
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Problems solved by technology

The research on the adsorption of arsenic ions in sewage by attapulgite microspheres based on sodium alginate has not been reported yet, and it is worthy of further study

Method used

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with specific examples: a kind of hydrogel microspheres of the present invention adsorbing heavy metal arsenic, the components and mass percent of said hydrogel microspheres are: sodium alginate 2- 10%, attapulgite monomer 1-12%, and the balance is water; the two natural polymer materials, sodium alginate and attapulgite monomer, are modified by blending and crosslinking to prepare the attapulgite Roast clay sodium alginate modified hydrogel microspheres for adsorption of heavy metal arsenic.

[0015] A method for preparing hydrogel microspheres that adsorb heavy metal arsenic as described above, the preparation method includes the following steps:

[0016] (a) Add sodium alginate to deionized water or theophylline aqueous solution, and mechanically stir at room temperature to form a sodium alginate solution;

[0017] (b) adding attapulgite monomer into deionized water or theophylline aqueous soluti...

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Abstract

Provided are hydrogel microspheres for adsorbing heavy metal arsenic and a preparation method thereof. The hydrogel microspheres comprise the composition by the mass percentage: 2-10% of sodium alginate, 1-12% of an attapulgite monomer, and the balance water. The preparation method comprises the steps: (a) adding sodium alginate to deionized water or a theophylline aqueous solution, and mechanically stirring at room temperature, to form a sodium alginate solution; (b) adding the attapulgite monomer to deionized water or a theophylline aqueous solution, carrying out ultrasonic dispersion, and then removing a solid precipitate in a dispersion body by centrifugation, to obtain an attapulgite monomer suspension solution; (c) mixing the sodium alginate solution and the attapulgite monomer suspension solution according to the ratio of 1:9-10:1 and stirring evenly, to prepare an attapulgite-sodium alginate mixed solution; and (d) dropwise adding the attapulgite-sodium alginate mixed solutioninto a divalent metal ion crosslinking agent, to obtain ionic crosslinked gel particles, rinsing the ionic crosslinking gel particles by distilled water, and carrying out vacuum drying to obtain an attapulgite-sodium alginate modified polymer, namely the hydrogel microspheres.

Description

technical field [0001] The invention relates to a hydrogel microsphere for adsorbing heavy metal arsenic and a preparation method thereof, belonging to the technical field of water treatment adsorption. Background technique [0002] With the intensification of environmental pollution caused by industry, water pollution has become a global problem, and water treatment has become the focus of environmental protection work in all countries in the world. Attapulgite microspheres based on sodium alginate to adsorb arsenic ions in sewage have not been reported yet, and it is worth further research. At present, there is a serious arsenic pollution in water worldwide that needs to be solved urgently. This study aims to explore a cost-effective way to solve this problem. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a kind of product with wide molecular weight distribution, many active group po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/267B01J20/28021B01J20/28047C02F1/285C02F2101/103C02F2101/20
Inventor 欧阳小琨
Owner ZHEJIANG OCEAN UNIV
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