Preparation method of magnetic lignosulfonate adsorbing material

A technology of lignosulfonate and adsorption material, which is applied in the field of preparation of magnetic lignosulfonate adsorption material, can solve the problems of uneven distribution of magnetic particles, easy agglomeration, etc., and achieves wide application, mild conditions and wide source of raw materials Effect

Inactive Publication Date: 2019-01-04
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to propose a preparation method of magnetic lignosulfonate adsorption material, which uses lignosulfonate as a substrate and grows nano ferric oxide particles in situ, and utilizes lignosulfonate and nanoparticles To solve the problems of non-uniform distribution of magnetic particles and easy agglomeration of magnetic lignin-based composites prepared by existing chemical methods, in order to obtain uniform dispersion of magnetic particles, good water solubility, and a large number of oxygen-containing functional groups on the surface Magnetic lignosulfonate adsorption material

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  • Preparation method of magnetic lignosulfonate adsorbing material
  • Preparation method of magnetic lignosulfonate adsorbing material
  • Preparation method of magnetic lignosulfonate adsorbing material

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[0023] The preparation method of the magnetic lignosulfonate adsorption material proposed by the present invention comprises the following steps:

[0024] (1) dissolving lignosulfonate in water to form lignosulfonate aqueous solution, so that the mass volume concentration of lignosulfonate aqueous solution is 1~10g / L;

[0025] (2) Ferrous iron salt and ferric salt are added in the solution of above-mentioned step (1) successively and stirred, obtain the first solution that mixes uniformly, in the first solution, Fe 3+ The molar concentration of Fe is 0.01~0.04mol / L, Fe 2+ with Fe 3+ The molar ratio is 1:2~1:1;

[0026] (3) make the first solution of above-mentioned step (2) react under ultrasonic condition, ultrasonic frequency is 40kHz, and temperature is 20~40 ℃, in ultrasonic process, add alkaline precipitation agent drop by drop, make the pH value of solution greater than 10 , reacted for 40 to 90 minutes to obtain the reactant;

[0027] (4) After the reaction is over,...

Embodiment 1

[0034] 0.5g sodium lignosulfonate was dissolved in 100mL deionized water, 0.4865g FeSO 4 ·7H 2 O was added to the sodium lignosulfonate solution and stirred until completely dissolved, then 0.5406g FeCl 3 ·6H 2 O was added to the solution and stirred until completely dissolved. The solution was placed under ultrasonic conditions, and 4 mol / L sodium hydroxide aqueous solution was added dropwise to adjust the pH value to 13, and reacted at room temperature for 1 h. The reacted solution is subjected to solid-liquid separation under the action of a magnetic field, the upper liquid is poured off, the solid phase is washed with deionized water until neutral, and finally the solid phase is freeze-dried to obtain a magnetic lignosulfonate adsorption material.

[0035] Structural characterization of magnetic lignosulfonate adsorption materials: FT-IR, VSM and XRD were used to analyze the prepared magnetic lignosulfonate adsorption materials.

[0036] Such as figure 1 Shown are sod...

Embodiment 2

[0038]0.5g sodium lignosulfonate was dissolved in 100mL deionized water, 0.4170g FeSO 4 ·7H 2 O was added to the sodium lignosulfonate solution and stirred until completely dissolved, then 0.5406g FeCl 3 ·6H 2 O was added to the solution and stirred until completely dissolved. The solution was placed under ultrasonic conditions, and 4 mol / L sodium hydroxide aqueous solution was added dropwise to adjust the pH value to 13, and reacted at room temperature for 1 h. The reacted solution is subjected to solid-liquid separation under the action of a magnetic field, the upper liquid is poured off, the solid phase is washed with deionized water until neutral, and finally the solid phase is freeze-dried to obtain a magnetic lignosulfonate adsorption material.

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Abstract

The invention relates to a preparation method of a magnetic lignosulfonate adsorbing material, and belongs to the field of material science. The method comprises the following steps: firstly dissolving lignosulfonate into water to form a lignosulfonate water solution, sequentially adding ferrous salt and ferric salt into the solution, and stirring the solution, so as to obtain a uniformly mixed first solution, ensuring that the first solution is in reaction in an ultrasonic condition, dropwise adding an alkaline precipitator during the reaction process, ensuring that the pH value of the solution is greater than 10, so as to obtain a reactant; performing solid-liquid separation on the reactant under the action of magnetic field, and cooling and drying solid phase, so as to obtain the magnetic lignosulfonate adsorbing material. The method has the advantages that the lignosulfonate is compounded with magnetic ferroferric oxide nanometer particles to form the magnetic lignosulfonate adsorbing material, raw materials are low in price and wide in source, the preparation technology is simple, the condition is mild, the quantity of required equipment is small, and industrial production canbe realized.

Description

technical field [0001] The invention relates to a preparation method of a magnetic lignosulfonate adsorption material, which belongs to the field of material science. Background technique [0002] At present, my country's water pollution problems are very serious, mainly including heavy metal ion pollution and dye pollution, which seriously threaten the environment and health we depend on for survival. There are many treatment methods for water pollution, including adsorption, chemical precipitation, ion exchange, membrane filtration, etc. Among them, the adsorption method is widely used due to its advantages of less secondary pollution, high treatment efficiency, and regenerable adsorbent. [0003] Magnetic iron ferric oxide nanoparticles have the advantages of high saturation magnetization, large specific surface area, and easy functional modification of the surface, and are widely used in the fields of medicine and water treatment. Magnetic Fe3O4 nanoparticles are easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/265B01J20/28009B01J20/30
Inventor 常建民耿晶杨科研谷飞
Owner BEIJING FORESTRY UNIVERSITY
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