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Metal ion nanoadsorbent

A nano-adsorption and metal ion technology, applied in the direction of adsorption of water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., to achieve the effects of increased dispersion, enhanced adsorption, and increased contact rate

Inactive Publication Date: 2010-11-24
CHANGCHUN UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

Its adsorption effect only comes from the physical adsorption of the molecular sieve itself

Method used

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Embodiment Construction

[0011] The adsorbent of the present invention is specifically realized in that the chelating agent EDTA (ethylenediaminetetraacetic acid) is distributed in the nano-molecular sieve mesopore, the nano-molecular sieve is SBA-15, and the adsorbent is designated as (SBA-15) -EDTA.

[0012] The preparation of the adsorbent of the present invention is as follows: adopt the liquid phase method, accurately measure the SBA-15 powder according to the required amount, add it to the EDTA solution, stir it magnetically for 48 hours, filter, wash, and dry to obtain EDTA modified SBA -15, namely (SBA-15)-EDTA, wherein the host is SBA-15 nanometer molecular sieve, the guest is EDTA, and the two form a complex.

[0013] from figure 1 It can be seen that the prepared (SBA-15)-EDTA has a strong diffraction peak at 2θ of 0.88°, which corresponds to the (100) peak of SBA-15, and two weaker diffraction peaks appear at 1.5° and 1.8° respectively. The diffraction peaks correspond to the (110) diffr...

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Abstract

The invention relates to a metal ion nanoadsorbent which can adsorb metal ions in a water body, such as Cr<6+> and Cd<2+>, belonging to the technical field of inorganic functional materials. EDTA is an important chelating agent and can form stable water-soluble complexes with alkali metals, rare earth elements, transition metals and the like through chemical adsorption; however, as the EDTA is often united in the water, the dispersion is poor, and the adsorption effect is not well. The prior art adopts a Zeolite-A zeolite molecular sieve to adsorb the metal ions in the water body through physical adsorption. The adsorbent is characterized in that the chelating agent of the EDTA is distributed in the mesoporous nano-molecular sieve, the adsorbent has multi-adsorption effect including the physical adsorption and the chemical adsorption, and can adsorb 98.0% of Cr<6+> and 99.0% of Cd<2+> in the water body in 30 minutes.

Description

technical field [0001] The invention relates to a metal ion nano-adsorbent capable of adsorbing metal ions in water, such as Cr 6+ 、Cd 2+ , belongs to the technical field of inorganic functional materials. Background technique [0002] In recent years, with the development of industrialization, human activities have caused more and more damage to their living environment. Governing the environment has become an urgent task and a bounden duty. The management of water bodies is particularly urgent. Some heavy metal elements in water, such as chromium, cadmium, nickel, etc., have great harm to the human body, so the adsorption treatment of heavy metal elements in water is a key point in water treatment today. [0003] EDTA (ethylenediaminetetraacetic acid) is an important chelating agent that can form stable water-soluble complexes with alkali metals, rare earth elements and transition metals, and one EDTA molecule can complex 4 metal ions, so , EDTA can be used as an impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22C02F1/28C02F1/62C02F101/22
Inventor 于辉马玉芹翟庆洲李晓东徐镜波
Owner CHANGCHUN UNIV OF SCI & TECH
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