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Heavy metal ion adsorption material and preparation method and application thereof

A technology for heavy metal ions and adsorption materials, which is applied in alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc. Gentle, easy-to-operate effect

Pending Publication Date: 2020-11-27
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a heavy metal ion adsorption material and its preparation method and application to solve the problem that the polymer material adsorbent in the prior art has few types of heavy metal adsorption in sewage and is difficult to adapt to the current sewage treatment with complex heavy metal composition. question

Method used

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  • Heavy metal ion adsorption material and preparation method and application thereof
  • Heavy metal ion adsorption material and preparation method and application thereof
  • Heavy metal ion adsorption material and preparation method and application thereof

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Embodiment 1

[0035] This embodiment includes the following steps

[0036] (1) Preparation of magnetic sodium alginate composite material

[0037] Using physical blending method to prepare magnetic sodium alginate composite material (SA / Fe 3 O 4 @SiO 2 ), preparation materials: sodium alginate (SA), Fe 3 O 4 @SiO 2 , Calcium chloride (CaCl 2 ). First, dissolve SA in deionized water with a mass ratio of 2%, and stir it magnetically, and then according to the mass ratio SA: Fe 3 O 4 @SiO 2 5:1, take Fe 3 O 4 @SiO 2 Pour the solid into the sodium alginate solution and stir to make it evenly dispersed. At the same time, prepare CaCl with a concentration of 0.2mol / L 2 Solution. Finally, use a separatory funnel to fill the magnetic sodium alginate suspension, and drop it into the prepared CaCl 2 In the solution, let stand for 10h to make Ca 2+ Further infiltrate into the pellets, gelation reaction occurs, and magnetic sodium alginate (SA / Fe 3 O 4 @SiO 2 ) The gel beads, and then the prepared gel bead...

Embodiment 2

[0049] This embodiment includes the following steps

[0050] (1) The mechanism of magnetic sodium alginate composite material to adsorb heavy metal ions

[0051] The main mechanisms for the adsorption of heavy metal ions on magnetic sodium alginate composites include functional groups such as -OH and -COOH and Pb 2+ , Co 2+ , Cu 2+ And other metal ions form complexes to make Ca 2+ With Pb 2+ , Co 2+ When metal ions undergo ion exchange, see the specific process Figure 8 .

[0052] (2) The effect of pH on the adsorption of metal ions by the magnetic sodium alginate composite

[0053] Lead ion solutions of different pH have a very important effect on the adsorption of lead ions by the hydrogel. Due to the different pH value of the lead ion solution, the adsorption performance of the hydrogel to lead ions will be different. In this test, under the same other conditions (adsorption time 120min, lead ion concentration 500mg / L, temperature 15℃), the pH of the metal ion solution is used as...

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Abstract

The invention discloses a heavy metal ion adsorption material and a preparation method and application thereof. The material is a magnetic sodium alginate composite material composed of sodium alginate and Fe3O4-coated SiO2 nanoparticles, wherein the sodium alginate serves as a framework and is of a porous structure, and pores of the sodium alginate are filled with the magnetic Fe3O4-coated SiO2 nanoparticles. The magnetic sodium alginate composite material provided by the invention has high adsorption capacity on lead, nickel, cadmium, cobalt, copper, magnesium, zinc and other heavy metals inwastewater, especially has good selectivity on lead ions, the maximum adsorption capacity reaches 137mg / g, and the adsorption rate reaches 83%. The material has good reusability and convenient magnetic separability, still keeps 85% of adsorption effect after being repeatedly used for ten times, and has wide application prospects in the aspect of removing heavy metal ions in sewage.

Description

Technical field [0001] The invention relates to a metal ion adsorption material, a preparation method and application thereof, and belongs to the field of polymer composite material adsorbents. Background technique [0002] With the rapid development of human economic activities and the continuous advancement of science and technology, the problem of water environmental pollution has become more and more serious. The polluted water contains a large number of heavy metal ions. It has strong reactivity in water and is serious for human health and ecosystems. Threat. Treatment methods for heavy metal polluted water include chemical precipitation, bioremediation, and adsorption. Among them, the adsorption method is widely concerned because of its high work efficiency and environmental friendliness. [0003] Magnetic nano-adsorbing materials have the characteristics of high dispersibility, large specific surface area, and easy separation under a magnetic field. Although they are prom...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28C02F1/28B01J20/30C02F101/20
CPCB01J20/24B01J20/103B01J20/06B01J20/041B01J20/28009C02F1/286C02F1/281C02F2101/20
Inventor 王士凡孙华堵锡华董黎明宫贵贞李靖么冰
Owner XUZHOU UNIV OF TECH
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