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Selective heavy metal ion adsorption material and preparation method and application thereof

A technology for heavy metal ions and adsorption materials, which is applied in the directions of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem of limited metal ions, etc., and achieves the effects of simple preparation process, strong selectivity and wide sources.

Active Publication Date: 2020-09-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrolysis can reduce the use of chemical reagents and can directly recycle metal copper, but the separated metal ions are limited, and electrodes need to be improved to increase current efficiency and recovery capacity

Method used

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  • Selective heavy metal ion adsorption material and preparation method and application thereof
  • Selective heavy metal ion adsorption material and preparation method and application thereof
  • Selective heavy metal ion adsorption material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0049] Experiment of adsorption properties of PAN-S on copper. The simulated copper-containing wastewater was treated as the treatment object, and the PAN-S obtained in Example 1 was used to evaluate its adsorption characteristics for copper in the wastewater. At room temperature (~20 ℃) ​​in a water bath shaker, 50 mL of copper-containing wastewater was placed in a 250 mL Erlenmeyer flask, the dosage of PAN-S was 30.0 mg, and the adsorption equilibrium time was 4 h.

[0050] figure 1 (a) is the initial Cu 2+ When the concentration is 50.0 mg / L and the liquid phase pH is 3.0, 4.0, 5.0, respectively, the copper removal rate of PAN-S. As the pH of the liquid phase increased, the adsorption capacity of PAN-S to copper in wastewater was enhanced.

[0051] figure 1 (b) is the initial Cu 2+ Concentration 0, 1.0, 2.0, 4.0, 5.0, 10.0, 20.0, 50.0, 100.0 mg / L, when the liquid phase pH is 5.0, the copper removal rate of PAN-S. When the pH of the liquid phase is 5.0, the saturated a...

Embodiment 8

[0059] Experiment of the adsorption properties of PAN-S@MF on copper. The simulated copper-containing wastewater was used as the treatment object, and the PAN-S@MF obtained in Example 5 was used to evaluate its adsorption characteristics for copper in wastewater. A self-made plexiglass reaction device (dimensions: length 60.0 mm*width 20.0 mm*height 120.0 mm) was used to treat copper-containing wastewater at room temperature in the cycle operation mode of water inflow from the bottom and water out from the top. The initial Cu 2+ The concentration is 50.0 mg / L, the liquid phase pH=3.0, 4.0, 5.0, and the treated water volume is 500.0 mL.

[0060] Figure 5 (a) is the copper removal rate of different adsorption equilibrium time for copper-containing wastewater treatment. PAN-S@MF has high copper removal efficiency under different liquid phase pH conditions, and the copper removal efficiency increases gradually with the increase of pH. When the liquid phase pH=3.0, 4.0,5.0, the...

Embodiment 9

[0063] Application experiment of PAN-S@MF to treat copper-containing wastewater. Using a self-made plexiglass reaction device (dimensions: length 60.0 mm*width 20.0 mm*height 120.0 mm), the PAN-S@MF obtained in Example 5 was placed in the reaction device, and the water was fed from the bottom and the water was discharged from the top. Copper-containing wastewater was treated at room temperature, and the initial Cu 2+ The concentration is 50.0 mg / L, the pH of the liquid phase is 5.0, and the treated water volume is 500.0 mL.

[0064] The graphite electrode is used as the anode, the titanium plate is used as the cathode, and the electrolyte is 0.5 mol / L nitric acid. The size of the electrolytic cell is: length 55.0 mm*width 30.0 mm*height 50.0 mm; the distance between the plates is 30.0 mm, and the copper-containing wastewater will pass through The treated PAN-S@ML was placed in it, the operating voltage was 5.0 V, and the time was 30 min to recover the adsorption material and ...

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Abstract

The invention discloses a selective heavy metal ion adsorption material polyacrylonitrile-sulfur@melamine sponge which is prepared by forming a polyacrylonitrile-sulfur polymer through a high-temperature polymerization reaction of polyacrylonitrile and sulfur and fixing polyacrylonitrile-sulfur in a melamine sponge skeleton structure through a hot solvent bonding method. The polyacrylonitrile-sulfur@melamine sponge has selective adsorbability, the removal rate of copper in copper-containing wastewater is high, an electrolytic tank is formed by the polyacrylonitrile-sulfur@melamine sponge, a cathode, an anode and an electrolyte solution, copper-sulfur efficient separation is carried out through an electrochemical anodic oxidation reaction to regenerate an adsorption material, and copper deposition recovery is carried out through a cathodic reduction reaction. Environment-friendly, efficient and low-cost up-to-standard treatment and resource recycling of copper in copper-containing wastewater are achieved, the preparation raw materials are wide in source, cheap and easy to obtain, the preparation process is simple, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a heavy metal ion adsorption material, in particular to a selective heavy metal ion adsorption material and its preparation method and application. Background technique [0002] With the vigorous development of economy, society and industry, more and more heavy metals enter the environment with industrial wastewater, which poses a serious threat to the ecological environment and human health. Copper-containing wastewater is the most important type of heavy metal wastewater, which mainly comes from copper mining and dressing and smelting processes. As far as my country is concerned, the amount of copper mining increased from 890,000 t in 2009 to 1,600,000 t in 2019, while hydrometallurgy The process will inevitably cause problems such as surface and groundwater pollution around the location of the copper mine. In addition, industries such as electroplating, spray coating, electronic device processing, battery manufacturing and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/26B01J20/28C02F1/28C08F8/34C08F120/44C08J9/42C08L61/28C02F101/20
CPCB01J20/264B01J20/28011B01J20/28057C02F1/285C08F8/34C08J9/42C02F2101/20C08J2361/28C08F120/44Y02P10/20
Inventor 李鹏王立章徐桂银蒋海斌
Owner CHINA UNIV OF MINING & TECH
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