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Modified nanometer chlorapatite and preparation method thereof

A chloroapatite and nano-technology, applied in the field of modified nano-chloroapatite and its preparation, can solve the problems of difficult sediment migration, uneven dispersion, easy settlement, etc., and achieve beneficial sediment restoration and uniform dispersion , Improve the effect of reactivity

Inactive Publication Date: 2015-08-26
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apatite group minerals such as chloroapatite are insoluble phosphates. Due to the limitation of solubility and mobility, their repair effect on sediment heavy metals is lower than that of soluble phosphates, but soluble phosphates can easily cause phosphorus loss and cause water enrichment. Nutritization; although nano-scale chloroapatite can take advantage of the size advantages of its nanoparticles to improve its reactivity, nano-chloroapatite tends to collide with each other and agglomerate into large particles, and it is easy to settle, and it is not uniformly dispersed in aqueous solution, let alone Easy to migrate in sediment

Method used

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  • Modified nanometer chlorapatite and preparation method thereof
  • Modified nanometer chlorapatite and preparation method thereof
  • Modified nanometer chlorapatite and preparation method thereof

Examples

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Embodiment 1

[0034] A modified nano chloroapatite (SDS-nClAP) of the present invention, the modified nano chloroapatite is composed of nano chloroapatite and sodium lauryl sulfate, sodium lauryl sulfate is modified on On the surface of nano chloroapatite, the mass ratio of sodium lauryl sulfate to nano chloroapatite is 7.1687:1. The particle size of the modified nano chloroapatite is 5nm-8nm.

[0035] A preparation method of the modified nano-chloroapatite of the above-mentioned present embodiment, comprising the following steps:

[0036] (1) CaCl 2 Solution preparation: weigh 1.9698g CaCl 2 2H 2 O into a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 500mL volumetric flask, use ultrapure water to adjust the volume to the mark, and shake well to obtain 26.8mM CaCl 2 solution.

[0037] Na 3 PO 4 Solution preparation: weigh 3.04g Na 3 PO 4 12H 2 O into a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 500mL volu...

Embodiment 2

[0045] A modified nano chloroapatite (SDS-nClAP) of the present invention, the modified nano chloroapatite is composed of nano chloroapatite and sodium lauryl sulfate, sodium lauryl sulfate is modified on On the surface of nano chloroapatite, the mass ratio of sodium lauryl sulfate to nano chloroapatite is 7.1687:1. The particle size of the modified nano chloroapatite is 5nm-8nm.

[0046] A preparation method of the modified nano-chloroapatite of the above-mentioned present embodiment, comprising the following steps:

[0047] (1) CaCl 2 Solution preparation: weigh 1.9698gCaCl 2 2H 2 O into a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 500mL volumetric flask, use ultrapure water to adjust the volume to the mark, and shake well to obtain 26.8mM CaCl 2 solution.

[0048] Na 3 PO 4 Solution preparation: weigh 3.04g Na 3 PO 4 12H 2 O into a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 500mL volum...

Embodiment 3

[0055] A modified nano chloroapatite (SDS-nClAP) of the present invention, the modified nano chloroapatite is composed of nano chloroapatite and sodium lauryl sulfate, sodium lauryl sulfate is modified on On the surface of nano chloroapatite, the mass ratio of sodium lauryl sulfate to nano chloroapatite is 14.3375:1. The particle size of the modified nano chloroapatite is 5nm-8nm.

[0056] A preparation method of the modified nano-chloroapatite of the above-mentioned present embodiment, comprising the following steps:

[0057] (1) CaCl 2 Solution preparation: weigh 1.9698gCaCl 2 2H 2 O into a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 500mL volumetric flask, use ultrapure water to adjust the volume to the mark, and shake well to obtain 26.8mM CaCl 2 solution.

[0058] Na 3 PO 4 Solution preparation: weigh 3.04g Na 3 PO 4 12H 2 O into a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 500mL volu...

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Abstract

The present invention discloses a modified nanometer chlorapatite and a preparation method thereof, wherein the modified nanometer chlorapatite comprises nanometer chlorapatite and sodium lauryl sulfate, the sodium lauryl sulfate is modified on the nanometer chlorapatite surface, and a mass ratio of the sodium lauryl sulfate to the nanometer chlorapatite is 7-15:1. The modified nanometer chlorapatite preparation method comprises: under a stirring condition, adding a CaCl2 solution to a sodium lauryl sulfate solution in a dropwise manner, adding a Na3PO4 solution to the obtained mixed solution in a dropwise manner, and adjusting the pH value to 8.0-10.0 so as to prepare the product. The modified nanometer chlorapatite the present invention has advantages of large specific surface area, good dispersion property, high stability, and the like. In addition, the modified nanometer chlorapatite preparation cost is low, no secondary pollution is generated to the environment, and the method is suitable for large-scale use.

Description

technical field [0001] The invention belongs to the field of physical and chemical treatment of heavy metals in polluted bottom mud, and relates to a novel modified nano material and a preparation method thereof, in particular to a modified nano chloroapatite and a preparation method thereof. Background technique [0002] At present, the problem of heavy metal pollution in my country is becoming more and more serious, which has seriously affected the survival and health of human beings, and the treatment of heavy metal pollution has become a hot issue. Passivation restoration is to adjust and change the occurrence form of heavy metals by adding stabilizing materials, and reduce their bioavailability in the environment, thereby reducing the toxicity of these heavy metal elements to animals and plants. Passivation restoration is a way to control heavy metal pollution one of the important ways. [0003] Many studies at home and abroad have shown that phosphate substances mainl...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/08C02F11/00C02F101/20
Inventor 万佳童丽曾光明黄丹莲黄超赖萃许飘武海鹏胡亮程敏
Owner HUNAN UNIV
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