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Application of magnetic composite material in removal of plastic fragments

A technology of magnetic composite materials and plastic fragments, applied in the field of adsorption, can solve the problems of unsuitable removal and low adsorption capacity, and achieve the effect of short response time and high removal rate

Pending Publication Date: 2022-04-12
杭州布平医学检验实验室有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low adsorption capacity and complicated process make it unsuitable as an effective solution for the removal of plastic debris from aquatic environments

Method used

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  • Application of magnetic composite material in removal of plastic fragments
  • Application of magnetic composite material in removal of plastic fragments
  • Application of magnetic composite material in removal of plastic fragments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Synthesis of Magnetic ANM (Artificial Melanin)

[0063] Overall, magnetic ANMs were synthesized as follows: Fe(II) and Fe(III) chlorides were dissolved in alkaline medium ammonium hydroxide (NH 3 ·H 2 O) Co-precipitation to synthesize magnetic Fe 3 o 4 , and then the magnetic Fe 3 o 4 Mixed with raw materials for the synthesis of polydopamine to obtain polydopamine-coated Fe 3 o 4 (i.e. a magnetic ANM is obtained).

[0064] Specifically, a): 10 mL containing Fe(II) and Fe(III) chloride (Fe II / Fe III Molar ratio = 1:4) of deionized water and ethanol (volume 1:1) and 0.2mL NH 3 ·H 2 O was placed in a 50 mL round bottom flask under nitrogen and stirred at 25°C for 1 hour. The product was washed 3 times with deionized water and ethanol and removed by an external magnet to give Fe 3 o 4 Magnetic nanoparticles; b) Then, under stirring at 25°C, 2 mg of lysine was completely dissolved in 20 mL of deionized water and ethanol (1:1 volume ratio); 5 mL of DA (1 mg mL ...

Embodiment 1-1 to 1-9

[0066] The only difference between these examples and Example 1 is that the same mass of ammonia water, arginine, sodium hydroxide, potassium hydroxide, phenethylamine, naphthylethylamine, n-propylamine, 1,5-pentanediamine and ethylamine were used respectively. Diamine was used as an initiator instead of lysine in Example 1, and finally a magnetic ANM was also synthesized.

[0067] The results of the magnetic ANMs synthesized in Example 1 and Examples 1-1 to 1-9 are shown in Table 1 below.

[0068] Table 1 Magnetic ANM prepared by different initiators

[0069]

Embodiment 2

[0071] Characterization of Magnetic ANM (Artificial Melanin)

[0072] The size of the magnetic ANM was determined by a Nanolink S900 instrument by dynamic light scattering (DLS) (Zhenli, China). The morphology of the magnetic ANMs was characterized by transmission electron microscopy (TEM) (JEOL JEM-2100F, Japan). Energy-dispersive X-ray spectroscopy (EDS) analysis was performed to identify the elements present in the magnetic ANM nanocomposites. The chemical structure of the magnetic ANM was analyzed by Fourier transform infrared spectroscopy (FTIR) (Thermo Scientific Nicolet TM 6700 FT-IR Spectrometer, USA) for characterization. A vibrating sample magnetometer (VSM) is a common tool for measuring the magnetic properties of superparamagnetic materials.

[0073] TEM results showed that Fe 3 o 4 NP nanospheres ( figure 1 A). In this application, Fe 3 o 4 NP is used as the core and ANM as the shell pair Fe 3 o 4 NP for coating (see figure 1 B), the size of the mag...

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Abstract

The invention discloses application of a magnetic composite material to removal of plastic fragments. As an adsorbent for removing plastic fragments, the magnetic composite material provided by the invention has higher removal rate and shorter response time, is suitable for removing various sizes and types of plastic fragments, is an ecological technology suitable for energy conservation and large-scale purification of fresh water and seawater, and has wide application prospects. And a way is opened up for effectively removing marine pollution by the magnetic composite material.

Description

technical field [0001] The present application relates to the field of adsorption, in particular to the application of a magnetic composite material to remove debris fragments through adsorption. Background technique [0002] Plastic waste in global water resources raises concerns about food safety, drinking water safety, and long-term ecological impacts. Due to its resistance to degradation and potential harmful effects on human health, plastic litter, including submicron plastics, micron-sized plastics, and nano-sized plastics, is a major pollutant in marine ecosystems and has attracted great attention from countries around the world. Globally, an estimated 8 million tonnes of plastic enter the ocean from land-based sources each year due to the massive consumption of plastic and poor management of plastic waste. Bulk plastics will inevitably be degraded into a large number of submicron plastics (≥20 μm), micron-sized plastics (1-20 μm) or even nano-sized plastics (< 1...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/26B01J20/28B01J20/30B29B17/02C02F103/08
CPCY02W30/62
Inventor 吴立冬相学平童莹慧童海贝
Owner 杭州布平医学检验实验室有限公司
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