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Resin-based nano-hydroxyapatite composite material, preparation method, and application of composite material in fluorine-polluted water treatment

A technology of nano-hydroxyapatite and composite materials, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. pH impact, difficult separation and recovery, etc., to achieve the effect of solving the difficulty of separation and regeneration, low preparation cost and simple process

Pending Publication Date: 2019-09-20
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the reasons that most of the fluorine removal adsorbents in the prior art are easily affected by the pH of the solution, secondary pollution, poor selectivity, etc., and the nano-hydroxyapatite particles are easy to agglomerate and deactivate in water, difficult to separate, recycle, and regenerate To solve the problems such as difficulties, provide a resin-based nano-hydroxyapatite composite material, its preparation method and its application in the treatment of fluorine-polluted water

Method used

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  • Resin-based nano-hydroxyapatite composite material, preparation method, and application of composite material in fluorine-polluted water treatment
  • Resin-based nano-hydroxyapatite composite material, preparation method, and application of composite material in fluorine-polluted water treatment
  • Resin-based nano-hydroxyapatite composite material, preparation method, and application of composite material in fluorine-polluted water treatment

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Experimental program
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Effect test

Embodiment 1

[0035] The resin-based nano-hydroxyapatite composite material HAP-D201 is obtained by immobilizing nano-hydroxyapatite particles on the macroporous strongly basic anion-exchange resin D201, and its average particle size is 0.8mm (such as figure 1 shown), the point of zero charge is 9.2 (as figure 2 shown), the crystal form is amorphous (as image 3 shown), the particle size of the immobilized nano-hydroxyapatite particles is 50nm (such as Figure 4 Shown), the HAP immobilization amount is 15%.

[0036] The specific preparation steps of the resin-based nano-hydroxyapatite composite material are as follows:

[0037] (1) 32.7880g Na 3 PO 4 Dissolve in 200mL water to get PO 4 3- Solution A with a concentration of 1M;

[0038] (2) 37.0673g CaCl 2 Dissolve in 200mL water to get Ca 2+ Solution B with a concentration of 1.67M;

[0039] (3) Weigh 5g of D201 resin in a three-necked flask, add solution A to it, mix and stir at 200rpm at 40°C for 12h, and make PO 4 3- Fully e...

Embodiment 2

[0048] The resin-based nano-hydroxyapatite composite material HAP-D301 was obtained by immobilizing nano-hydroxyapatite particles on macroporous weakly basic anion-exchange resin D301. The average particle size was 1.0mm, the zero charge point was 8.5, and the crystal form was Shaped, the diameter of the nano-hydroxyapatite particles immobilized is 60nm, and the immobilized amount of HAP is 12%.

[0049] The specific preparation steps of the resin-based nano-hydroxyapatite composite material are as follows:

[0050] (1) 32.7880g Na 3 PO 4 Dissolve in 200mL water to get PO 4 3- Solution A with a concentration of 1M;

[0051] (2) 37.0673g CaCl 2 Dissolve in 200mL water to get Ca 2+ Solution B with a concentration of 1.67M;

[0052] (3) Weigh 5g of D301 resin in a three-necked flask, add solution A to it, mix and stir at 200rpm at 40°C for 24h, and make PO 4 3- Fully exchanged to the surface and interior of the resin;

[0053] (4) Filter out the resin obtained in step (...

Embodiment 3

[0061] Resin-based nano-hydroxyapatite composite material HAP-201×4 was obtained by immobilizing nano-hydroxyapatite particles on gel-type strongly basic anion-exchange resin 201×4, with an average particle size of 0.6 mm and a zero charge point of 9.0 , the crystal form is amorphous, the diameter of the nano-hydroxyapatite particles immobilized is 50nm, and the immobilized amount of HAP is 14%.

[0062]The specific preparation steps of the resin-based nano-hydroxyapatite composite material are as follows:

[0063] (1) 32.7880g Na 3 PO 4 Dissolve in 200mL water to get PO 4 3- Solution A with a concentration of 1M;

[0064] (2) 37.0673g CaCl 2 Dissolve in 200mL water to get Ca 2+ Solution B with a concentration of 1.67M;

[0065] (3) Weigh 5g of 201×4 resin in a three-necked flask, add solution A to it, mix and stir at 25°C for 12h at a speed of 200rpm, and make PO 4 3- Fully exchanged to the surface and interior of the resin;

[0066] (4) Filter out the resin obtaine...

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Abstract

The invention discloses a resin-based nano-hydroxyapatite composite material, a preparation method, and an application of the composite material in fluorine-polluted water treatment. The composite material is formed by immobilizing nano-hydroxyapatite particles on polymer resin, and the zero point of charge is 8-9.5, wherein the size of the nano-hydroxyapatite particles is in a range of 10-100 nm, the supporting amount of the nano-hydroxyapatite is in a range of 2-22%, and the polymer resin is polystyrene-divinylbenzene adsorption resin. The nano-scale hydroxyapatite particles are immobilized on the high-molecular resin material, so that the composite material with excellent adsorption performance, no secondary pollution, uniform size and easy separation and regeneration is obtained. The composite material has relatively high fluorine adsorption capacity in a polluted water body which is neutral or alkaline (pH=6-9), and has a specific adsorption function on fluorine ions in a high-competitiveness ion system. The composite material is low in preparation cost and simple in process, and is suitable for actual treatment of fluorine-polluted wastewater.

Description

technical field [0001] The invention belongs to the field of environmental functional nanometer composite materials, and in particular relates to a resin-based nanometer hydroxyapatite composite material, a preparation method and an application in the treatment of fluorine-polluted water bodies. Background technique [0002] Fluorine is one of the essential elements that constitute organisms and participate in the metabolic process in the earth system. The intake of trace amounts of fluorine is beneficial to the human body, but excessive fluorine will damage tooth enamel and bone osteogenesis and bone breaking activities, affecting The normal physiological activities of various tissues and organs of the whole body. At present, the fluorine content in groundwater in many parts of the world far exceeds the fluorine standard (1.5mg / L) stipulated by the World Health Organization. Endemic fluorosis has attracted the attention of people all over the world. How to control the fluo...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/14
CPCB01J20/26B01J20/048B01J20/28019C02F1/288C02F2101/14
Inventor 邱慧叶美晨宋明霞郁佳程帅启凡杨璐阳倪文翔刘佳蓓冯蔚刘湘丹
Owner NANJING UNIV OF INFORMATION SCI & TECH
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