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Preparation method of composite hydrogel for adsorbing and detecting heavy metal ions

A heavy metal ion and composite hydrogel technology, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of inability to detect heavy metal ions, single heavy metal ion adsorption function, etc., and achieve excellent removal effect , Industrialization is easy to implement, and the effect of excellent adsorption

Active Publication Date: 2017-05-10
华检计量检测(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current heavy metal ion adsorption materials generally only have a single heavy metal ion adsorption function, and cannot detect heavy metal ions at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of CA / ATP composite gel. A certain amount of SA was dissolved in 100 g of deionized water to prepare a 1% SA solution. ATP with an SA content of 10% was added to the SA solution, and stirred to fully disperse the ATP in the solution to obtain a gel material solution. Pour the material liquid on a glass plate, scrape it with a glass rod to form a film, and quickly immerse it in 1% CaCl at 20°C 2 In the solution, cross-linked and coagulated for 10 hours to form a CA / ATP hydrogel film. The product was washed continuously with distilled water to remove Ca on the surface of the product 2+ . Freeze-dry the obtained hydrogel product after washing, and set aside.

[0021] (2) Preparation of KH560 modified carbon dots. Weigh a certain mass of CD solid, dissolve it in deionized water, and prepare a CD solution with a solution concentration of 1 mg / mL. Add a certain amount of KH560 to the carbon dot aqueous solution, and the amount of KH560 added is 5% of the...

Embodiment 2

[0024](1) Preparation of CA / ATP composite gel. A certain amount of SA was dissolved in 100 g of deionized water to prepare a 2% SA solution. ATP with an SA content of 20% was added to the SA solution, and stirred to fully disperse the ATP in the solution to obtain a gel material solution. Pour the material liquid on a glass plate, scrape it with a glass rod to form a film, and quickly immerse it in 2% CaCl at 30°C 2 In the solution, cross-linked and coagulated for 10 hours to form a CA / ATP hydrogel film. The product was washed continuously with distilled water to remove Ca on the surface of the product 2+ . Freeze-dry the obtained hydrogel product after washing, and set aside.

[0025] (2) Preparation of KH560 modified carbon dots. Weigh a certain mass of CD solid, dissolve it in deionized water, and prepare a CD solution with a solution concentration of 2 mg / mL. Add a certain amount of KH560 to the carbon dot aqueous solution, and the amount of KH560 added is 8% of the ...

Embodiment 3

[0028] (1) Preparation of CA / ATP composite gel. A certain amount of SA was dissolved in 100 g of deionized water to prepare a 3% SA solution. ATP with an SA content of 30% was added to the SA solution, and stirred to fully disperse the ATP in the solution to obtain a gel material solution. Pour the material liquid on a glass plate, scrape it with a glass rod to form a film, and quickly immerse it in 3% CaCl at 40°C 2 In the solution, cross-linked and coagulated for 15 hours to form a CA / ATP hydrogel film. The product was washed continuously with distilled water to remove Ca on the surface of the product 2+ . Freeze-dry the obtained hydrogel product after washing, and set aside.

[0029] (2) Preparation of KH560 modified carbon dots. Weigh a certain mass of CD solid, dissolve it in deionized water, and prepare a CD solution with a solution concentration of 5 mg / mL. Add a certain amount of KH560 to the carbon dot aqueous solution, and the amount of KH560 added is 20% of th...

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Abstract

The invention discloses a preparation method of a composite hydrogel for adsorbing and detecting heavy metal ions, and belongs to the field of high polymer materials. The composite hydrogel is a calcium alginate / attapulgite / carbon-point composite hydrogel and is prepared by the following steps of (1) adopting calcium alginate and attapulgite as raw materials and forming a calcium alginate hydrogel CA / ATP in a calcium ion solution by means of crosslinking; (2) carrying out modifying treatment on commercially available calcium points by using a coupling agent 3-glycoxyl trimethoxysilane (KH560) to prepare KH560 modified carbon points; (3) immersing calcium alginate hydrogel CA / ATP and the KH560 modified carbon points into a CD-KH560 solution, carrying out light-proof oscillation, washing and freeze-drying in a table concentrator to prepare the composite hydrogel for adsorbing and detecting the heavy metal ions. According to the composite hydrogel, qualitative detection can be effectively carried out on the heavy metal ions in water and the heavy metal ions in the water can be adsorbed.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing a composite polymer hydrogel with good detection and adsorption functions for heavy metal ions such as nickel, chromium, lead and mercury. The composite hydrogel can not only effectively detect conventional heavy metal ions in water qualitatively, but also can absorb heavy metal ions in water, and can be applied to the sewage treatment fields such as electroplating industry and chemical industry. Background technique [0002] Heavy metal ion pollution can cause serious harm to the human body. At present, the main methods for the harmless treatment of wastewater containing heavy metal ions include membrane separation, electrochemical precipitation, ion exchange, adsorption and biological treatment. Among them, the adsorption method has high removal rate of heavy metal ions, large adsorption capacity, fast adsorption rate and easy operation. However, adsorb...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28C02F1/28G01N21/64B01J20/30C02F101/22C02F101/20
CPCB01J20/12B01J20/20B01J20/24B01J20/28033B01J20/28047C02F1/288C02F2101/20C02F2101/22G01N21/643G01N2021/6432
Inventor 赵义平文梦娟姜文哲曹小浩赵国部
Owner 华检计量检测(天津)有限公司
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