Chain-like nanometer magnetic material, preparation method and application thereof

Abstract

The invention discloses a chain-like nanometer magnetic material, a preparation method and an application thereof. The chain-like nanometer magnetic material is characterized by containing the following raw materials: ferric iron, acetate, dispersing agent and organic amine or organic acid; the mass concentrations of the ferric iron and the acetate in the dispersing agent are respectively 5-500g / L and 10-800g / L; the mass concentration of the organic amine or organic acid in the mixed solution after adding is 1-800g / L. According to the invention, various organic acids and organic amine are expanded; an amino or carboxyl modified chain-like nanometer magnetic composite material is acquired through a one-step process; the material with the chain-like structure can be acquired in the manner of inducing the composite material through hydrogen bond and magnetic field; the invention obviously innovates the controllability of the aggregation state structure of the material. The traditional method is performed in multiple steps, a covalent organic frame magnetic composite microsphere with a porous structure is acquired, the preparation process of the material is complex, the nonmagnetic components of the material are increased, the magnetic content of the acquired material is reduced and the method is adverse to magnetic separation.

Description

technical field [0001] The invention relates to a chain-shaped nano-magnetic material, a preparation method and its application technology, in particular to amino or carboxyl-functionalized nano-Fe 3 o 4 Chain-shaped magnetic material and preparation method thereof, and functionalized nano-Fe using amino or carboxyl groups of the present invention 3 o 4 The chain magnetic material absorbs and in situ degrades new environmental pollutants such as heavy metals, parabens, chlorophenols, and plasticizers in water to achieve environmental protection and other purposes. Background technique [0002] Compounds such as heavy metals, parabens, chlorophenols, and plasticizers are widely used in industrial and agricultural production. These substances will accumulate in water, soil, and organisms, and are difficult to degrade in the environment. They are called persistent environmental pollutants. Trace amounts of persistent environmental pollutants interfere with the endocrine sys...

AI Technical Summary

Problems solved by technology

However, due to the stable structure of these pollutants, the traditional process cannot achieve a good removal effect, such as: Cao Defeng et al. (Environmental Science and Technology, 2010, 33(3): 80-83.) reported the use of carbon nanotubes to adsorb 4 -Chlorophenol and 2,4-dichlorophenol, Sun Yaxi et al. (Water Treatment Technology, 2007,33(12):42-45.) Removal of trace 2,4,6-TCP in water by membrane bioreactor, Zhejiang University Ningbo The "Preparation Method of Composite Adsorbent Material Capable of Removing Plasticizers in Liquor" (Chinese Invention Patent: 201410063398.3) invented by the Institute of Science and Technology can only transfer persistent pollutants in the environment from the water phase to another phase, and If the pollutants are not completely degraded, it is easy to cause secondary pollution

The chemical oxidation method has a better removal effect on these pollutants, and the reaction speed is faster, but the treatment cost is higher, and it is easy to form strong carcinogenic pollutants

The cost of biological measures is low, and the degradation products are safe, but the removal effect is relatively poor

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