Preparation method of sodium alginate/chitosan hydrogel microspheres for heavy metal arsenic adsorption

A technology of hydrogel microspheres and sodium alginate, which is applied in the direction of adsorption of water/sewage treatment, alkali metal oxides/hydroxides, alkali metal compounds, etc., and can solve the problems of high cost, pollution, and high cost of preparing catalysts , to achieve the effect of simple preparation process, convenient removal and reduction of heavy metal content

Inactive Publication Date: 2018-07-06
ZHEJIANG OCEAN UNIV
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Problems solved by technology

But for the treatment of drinking water, because the content of these harmful ions is usually very low, the application of many methods is limited, such as the coagulation sedimentation method is more suitable for sewage treatment; the redox method must be used continuously and some...

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with specific examples: a kind of sodium alginate / chitosan hydrogel microsphere preparation method for heavy metal arsenic adsorption of the present invention, described preparation method comprises the following steps:

[0014] (a) select 1-5% carboxymethyl chitosan solution and 1-5% sodium alginate solution, mix according to the volume ratio of 1:1-8 to make mixed solution;

[0015] (b) Drop the mixed solution into 1-20% CaCl 2 The solution is stirred at 30-80° C. for 20 min-100 min at a rotational speed of 800-1200 rpm, the pellets are collected, washed with distilled water several times, freeze-dried or vacuum-dried to prepare hydrogel microspheres.

[0016] As a kind of preferred embodiment: a kind of sodium alginate / chitosan hydrogel microsphere preparation method for heavy metal arsenic adsorption of the present invention, described preparation method comprises the following steps:

[0017] (...

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Abstract

The invention relates to a preparation method of sodium alginate/chitosan hydrogel microspheres for heavy metal arsenic adsorption. The preparation method comprises the following steps of (a) selecting 1 to 5 percent of carboxymethyl chitosan solution and 1 to 5 percent of sodium alginate solution, and mixing according to the volume ratio of 1:(1 to 8) so as to obtain a mixed solution; (b) dropwise adding the mixed solution into 1 to 20 percent of CaCl2 solution, stirring with a rotation speed of 800 to 1200rpm for 20 min to 100 min at 30 to 80 DEG C, collecting small spheres, washing throughdistilled water for multiple times, and freeze drying or vacuum drying to obtain the hydrogel microspheres. The preparation method of the sodium alginate/chitosan hydrogel microspheres for heavy metalarsenic adsorption has the characteristics that the preparation process is simple, the raw material source is wide, harmful heavy metal in sewage can be adsorbed and conveniently removed, and the economic benefit and the social benefit of enterprises are improved.

Description

technical field [0001] The invention relates to a method for preparing sodium alginate / chitosan hydrogel microspheres used for the adsorption of heavy metal arsenic, and belongs to the technical field of preparation of adsorbents for sewage treatment. 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. [0003] At present, there are many methods to deal with heavy metals, including: coagulation precipitation method, adsorption method, oxidation method, ion exchange method, membrane separation method, biological method, photochemical technology, etc. But for the treatment of drinking water, because the content of these harmful ions is usually very low, the application of many methods is limited, such as the coagulation sedimentation method is more suitable for sewage treatment; t...

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C08L5/04C08L5/08C08J3/075C08J9/28C02F101/20
CPCB01J20/24B01J20/28021B01J20/28047C02F1/286C02F2101/103C02F2101/20C08J3/075C08J9/28C08J2205/022C08J2305/04C08J2305/08C08J2405/04C08J2405/08
Inventor 杨立业
Owner ZHEJIANG OCEAN UNIV
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