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Preparation method for magnetic polymer microspheres capable of adsorbing Cr in contaminated soil

A technology of polymer microspheres and magnetic microspheres, which is applied in the field of environmental restoration, can solve the problems of time-consuming, complicated and high-cost preparation process, and achieve the effects of short reaction time, uniform particle size and high adsorption efficiency

Inactive Publication Date: 2014-06-04
辽宁易发成林生态技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation of magnetic adsorption materials has been developed so far, and it is still difficult to grasp the characteristics of magnetic microspheres such as uniform particle size distribution, strong magnetic response, and good dispersion stability, and the preparation process is time-consuming, complicated, and costly.

Method used

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  • Preparation method for magnetic polymer microspheres capable of adsorbing Cr in contaminated soil
  • Preparation method for magnetic polymer microspheres capable of adsorbing Cr in contaminated soil
  • Preparation method for magnetic polymer microspheres capable of adsorbing Cr in contaminated soil

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: Preparation of magnetic polymer microspheres

[0030] Step (1): Fe 3 o 4 Preparation of ferrofluid

[0031] in N 2 Under gas protection, add 200mL deionized water to a 500mL four-neck flask, then add 5.41g FeCl 3 ·6H 2 O and 1.99gFeCl 2 4H 2 O, under strong stirring, quickly add concentrated ammonia water with a mass concentration of 29-30% at a rate of 2-3 drops / s to make the pH of the solution between 8-10, and stop stirring after 30 minutes of reaction. Wash 4-6 times with deionized water.

[0032] Step (2): Preparation of Oleic Acid Modified Ferrofluid

[0033] Pour 90mL of deionized water and 110mL of ethanol into the four-necked flask, then add the Fe3O4 magnetic fluid prepared in step (1) to re-disperse, and in a constant temperature water bath at 60°C, at a rate of 1-2 drops per second Add 1.5mL of oleic acid, stir and react for 1 hour to obtain a well-dispersed black magnetic fluid. After cooling, magnetically wash with deionized water un...

Embodiment 2

[0038] Embodiment 2: Preparation of magnetic polymer microspheres

[0039] Step (1): Fe 3 o 4 Preparation of ferrofluid

[0040] in N 2 Under gas protection, add 200mL deionized water to a 500mL four-neck flask, then add 5.41g FeCl 3 ·6H 2 O and 2.78g FeSO 4 ·7H 2 O Under strong stirring, quickly add concentrated ammonia water to make the pH of the solution between 8-10, and stop stirring after 30 minutes of reaction. Wash 4-6 times with deionized water.

[0041] Step (2): Preparation of Oleic Acid Modified Ferrofluid

[0042] Inject 100mL of deionized water and 100mL of ethanol into the four-necked flask, then add the Fe3O4 magnetic fluid prepared in step (1) to redisperse, and drop in 2mL of oleic acid in a constant temperature water bath at 60°C, and stir for 1 hour to obtain The black magnetic fluid with good dispersibility was cooled and magnetically washed with deionized water to neutrality, and then washed with ethanol, and then vacuum-dried at 60°C for 12 hour...

Embodiment 3

[0047] Example 3: Adsorption of Cr by amino functional magnetic polymer microspheres

[0048] Take 50ml of Cr solutions with concentrations of 100mg / L, 200mg / L, 300mg / L, 400mg / L, 500mg / L, 600mg / L, 700mg / L, 800mg / L, 900mg / L, 1000mg / L respectively, and take the above 0.05 g of the obtained amino magnetic microspheres were added to the Cr solution respectively, the adsorption temperature was 35 ° C, the pH was controlled at 2.5, and the constant temperature was oscillated for 24 hours. After the adsorption was completed, magnetic separation was carried out, and the solution was measured on a UV spectrophotometer Absorbance at 540nm, then calculate the concentration of Cr in the solution after adsorption equilibrium by the standard curve, and calculate the adsorption amount of magnetic microspheres according to the following formula:

[0049] q e = ( c 0 ...

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Abstract

The invention relates to the technical field of environmental restoration, in particular to a preparation method for magnetic polymer microspheres capable of adsorbing Cr in soil. Ferrous salt and ferric salt are used as inner cores, organics are used for coating the inner cores, so that the inner cores become the magnetic polymer microspheres with amino groups, and the obtained microspheres adsorb the heavy metal Cr through electrostatic attraction, ion exchange and coordination. The prepared polymer microspheres are good in dispersion stability, high in magnetic responsiveness and amino group content, even in particle size and high in efficiency of heavy metal Cr adsorption. Meanwhile, compared with other synthetic methods, the method has the advantages of being mild in reaction condition, short in reaction time, easy to implement and the like.

Description

technical field [0001] The invention relates to the technical field of environmental restoration, in particular to a preparation method of magnetic polymer microspheres capable of adsorbing Cr in soil. Background technique [0002] Due to the needs of industrial development, Cr(VI)-containing compounds are widely used as an important chemical raw material in electroplating, tanning, printing and dyeing, dyes and other industries. Chromium emissions include fuel oil, coal burning, steel making, stainless steel welding, cement plants, industrial paint and coating manufacturing, etc. [0003] Some Cr(VI) compounds are carcinogens, teratogens and mutagens, which seriously endanger human life and health. Studies have shown that Cr(VI)-induced oxidative stress can lead to genomic DNA damage and deterioration of blood lipid and protein oxidation. Cr(VI) can also cause many other health problems, such as inhalation of certain higher concentrations of Cr(VI)-containing compounds ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/42C08F292/00C08F220/14C08F212/36C08F220/32C08F8/32B01J13/02
Inventor 苗永刚卢麟麟孙仲桂董博
Owner 辽宁易发成林生态技术有限公司
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