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A magnetic core-shell microsphere and its preparation method and application

A core-shell microsphere and magnetic technology, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of dye wastewater monitoring application that have not been reported, and achieve low production cost and high treatment efficiency. The effect of short time, safe and easy operation

Inactive Publication Date: 2015-10-21
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Magnetic adsorbents can separate solids and liquids by applying an external magnetic field, and are suitable for large-area dynamic adsorption. Therefore, it has been widely used in the treatment of wastewater pollution, but the monitoring application of dye wastewater has not been reported.

Method used

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  • A magnetic core-shell microsphere and its preparation method and application
  • A magnetic core-shell microsphere and its preparation method and application
  • A magnetic core-shell microsphere and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A novel magnetic core-shell microsphere for treating dye wastewater, which is made of the following raw materials in parts by weight:

[0040]

[0041] A preparation method for treating different concentrations of dye wastewater adsorbents, the steps are:

[0042] a) Weigh trimesic acid, copper nitrate, and graphene oxide raw materials in parts by weight, weigh 0.5302g trimesic acid, dissolve in 15mL absolute ethanol, and obtain solution A; weigh 1.0898g copper nitrate, dissolve in In 15mL of water, obtain a copper nitrate solution, then weigh 0.16g of graphene oxide, put it into the copper nitrate solution, and ultrasonically disperse the graphite oxide in the solution to obtain solution B; put solution A and solution B in a 50mL reaction kettle, Add 0.1g nano Fe 3 o 4 , the reaction temperature is 170 or 175 or 178 or 180 or 185°C;

[0043] b) Using temperature programming (that is, setting a certain heating rate), the heating rate is 4 or 5 or 6 °C / min, after t...

Embodiment 2-6

[0051] Embodiment 2-6 (weight part)

[0052]

[0053] Its preparation method is identical with embodiment 1.

Embodiment 7

[0055] Methylene blue was used to simulate dye wastewater, and the concentration of methylene blue was 3.6mg / L. Add 0.1g Fe to 100mL dye wastewater 3 o 4 MOFs / GO (dosing concentration is 1.0g / L), after shaking for 20min, let it stand still, take the supernatant clear night to measure its absorbance, the concentration of residual methylene blue can be calculated through the relationship between absorbance and concentration, and p-methylene blue can be calculated from this The removal rate is 99.01%.

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Abstract

The invention discloses magnetic core-shell microspheres, and a preparation method and use thereof. The core-shell microspheres are prepared from the following materials in a certain ratio: nano Fe3O4, copper nitrate, trimesic acid and graphene oxide. The method comprises the steps of: (a) weighing the nano Fe3O4, the copper nitrate, the trimesic acid and the graphene oxide according to the ratio; pouring into a reaction kettle after ultrasonic oscillation, reacting at certain temperature and pressure; (b) heating and cooling by program; (c) separating sediments by an external magnet; preparing gray and black magnetic core-shell microspheres; respectively washing by distilled water and anhydrous ethanol and storing for later use; and (d) separating the anhydrous ethanol by the external magnet, and drying for use. The magnetic core-shell microspheres are strong in adsorption performance, can be efficiently used in cycle, can rapidly achieve balance within a short period of time, and are suitable for rapid treatment of dye wastewater. The adsorbent is good in stability, and can be used in cycle for a plurality of times after being analyzed by an analytical agent; the adsorption rate after the adsorbent is used in cycle for five times can be up to 96-99%.

Description

technical field [0001] The invention belongs to the field of wastewater treatment in environmental protection, and more specifically relates to a magnetic core-shell microsphere for treating wastewater with different concentrations of dyes, and also relates to a method for preparing magnetic core-shell microspheres for treating wastewater with different concentrations of dyes. It relates to the application of magnetic core-shell microspheres in the treatment of dye wastewater (or the application of magnetic solid-phase extraction agents in low-concentration monitoring of trace wastewater pollutants in water). Background technique [0002] China is a major producer of dyestuffs, capable of producing more than 550 varieties of dyestuffs in 11 major categories, ranking first in the world in terms of output and trade volume of dyestuffs. Dye wastewater refers to the wastewater discharged during the production of dyes and pigments. According to statistics, 12% of Hewei dyes are d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 李玲高明耿宏运袁丽君周晶
Owner HUBEI UNIV
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