Nano-hydroxyapatite/sodium alginate composite material, preparation method and application of nano-hydroxyapatite/sodium alginate composite material

A nano-hydroxyapatite, hydroxyapatite technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of high cost, unsuitable removal of heavy metal ions, secondary pollution, etc. Inexpensive, optimized heavy metal removal, good biocompatibility

Active Publication Date: 2014-10-29
武汉华威生物材料工程有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Among them, the chemical precipitation method is widely used, but it is not suitable for the removal of heavy metal ions at low concentrations and is prone to s

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  • Nano-hydroxyapatite/sodium alginate composite material, preparation method and application of nano-hydroxyapatite/sodium alginate composite material
  • Nano-hydroxyapatite/sodium alginate composite material, preparation method and application of nano-hydroxyapatite/sodium alginate composite material
  • Nano-hydroxyapatite/sodium alginate composite material, preparation method and application of nano-hydroxyapatite/sodium alginate composite material

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Embodiment 1

[0026] First, prepare an aqueous solution of calcium nitrate, Ca 2+ Concentration is 0.0334mol / L; prepare diammonium hydrogen phosphate aqueous solution, PO 4 3- The concentration is 0.02mol / L; according to the molar ratio Ca / P = 1.67, quickly pour 100mL diammonium hydrogen phosphate aqueous solution into 100mL calcium nitrate aqueous solution at 80°C, stir and mix evenly, and centrifuge to obtain the precipitate after reacting for 1 hour. Rinse 3 times with deionized water and redisperse in 200mL deionized water. Then, polyacrylic acid was added (the concentration after being added to the solution was 0.3mg / mL), and the high-energy ultrasonic probe was ultrasonically dispersed for 4 minutes to obtain a stable suspension. The average particle size of hydroxyapatite nanoparticles measured by the laser particle size analyzer was 107.1 nm( figure 1 ), the transmission electron microscope showed short columnar nanoparticles of 15-20nm×100-200nm ( figure 2 ). Add 0.607 g of s...

Embodiment 2

[0028] First, prepare an aqueous solution of calcium nitrate, Ca 2+ The concentration is 0.0668mol / L; prepare diammonium hydrogen phosphate aqueous solution, PO 4 3- The concentration is 0.04mol / L. According to the molar ratio Ca / P=1.67, quickly pour 100mL diammonium hydrogen phosphate aqueous solution into 100mL calcium nitrate aqueous solution at 80°C, stir and mix evenly, after reacting for 1 hour, centrifuge to obtain the precipitate, rinse it with deionized water for 3 times Redisperse in 200 mL deionized water. Then, polyacrylic acid was added (the concentration after being added to the solution was 0.5mg / mL), and the high-energy ultrasonic probe was ultrasonically dispersed for 4 minutes to obtain a stable suspension. The average particle size of hydroxyapatite nanoparticles measured by the laser particle size analyzer was 120.5 nm( image 3 ), the transmission electron microscope showed short columnar nanoparticles of 10-15nm×80-100nm ( Figure 4 ). Finally, add ...

Embodiment 3

[0030] First, prepare an aqueous solution of calcium nitrate, Ca 2+ The concentration is 0.1002mol / L; prepare diammonium hydrogen phosphate aqueous solution, PO 4 3- The concentration is 0.06mol / L. According to the molar ratio Ca / P=1.67, quickly pour 100mL diammonium hydrogen phosphate aqueous solution into 100mL calcium nitrate aqueous solution at 80°C, stir and mix evenly, after reacting for 1 hour, centrifuge to obtain the precipitate, rinse it with deionized water for 3 times Redisperse in 200 mL deionized water. Then, polyacrylic acid was added (the concentration after adding into the solution was 0.7 mg / mL), and the high-energy ultrasonic probe was ultrasonically dispersed for 6 minutes to obtain a stable suspension. Finally, add 0.1821 g of sodium alginate to the suspension (36.2 mL) containing 0.1821 g of hydroxyapatite, stir at 80 ° C, and as the water evaporates, the volume is reduced to 1 / 9, and a viscous colloidal state is obtained. things. After lyophilizatio...

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Abstract

The invention relates to a preparation method of nano-hydroxyapatite/sodium alginate composite material. The obtained material can be used for sewage treatment and used for adsorbing and removing heavy metal ions. The method comprises the following steps: quickly pouring a diammonium hydrogen phosphate aqueous solution in the aqueous solution of calcium nitrate, uniformly stirring and mixing, centrifuging to obtain a precipitate, washing the precipitate by using deionized water, re-dispersing the washed precipitate to the deionized water; adding a stabilizer in the obtained suspension, ultrasonically dispersing to obtain stable hydroxyapatite suspension; controlling the mass ratio of hydroxyapatite to sodium alginate, adding sodium alginate in the hydroxyapatite suspension; continuously heating and stirring, controlling the reaction time, evaporating water, carrying out freeze-drying to obtain the product. The preparation method has the advantages that the preparation process is simple and controllable, the raw material resource is wide, the cost is low, environment is protected, the pollution does not exist, the uniform compounding of the hydroxyapatite nano-particles and sodium alginate is realized, and the uniform dispersion and the non-reunion of the hydroxyapatite nano-particles are guaranteed.

Description

technical field [0001] The invention relates to a preparation method of a nano-hydroxyapatite / sodium alginate composite material, and the obtained material can be used for sewage treatment to adsorb and remove heavy metal ions. Background technique [0002] With social development, population increase, and industrialization, people's demand for water is increasing, but it has caused increasingly serious water pollution problems. Among them, the water pollution caused by industry is the most serious, mainly because industrial wastewater contains many kinds of harmful heavy metal ions (As, Cd, Cr, Cu, Hg, Ni, Pb, Se, V, Zn, etc.). If it is not thorough, it will bring serious ecological problems, such as "Minamata disease" and "bone pain disease". Therefore, the removal of heavy metal ions in sewage is an important research topic in sewage treatment. [0003] For the treatment of heavy metal ions, the traditional treatment methods mainly include ion exchange method, electroch...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 韩颖超卢霄飞王欣宇戴红莲李世普
Owner 武汉华威生物材料工程有限公司
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