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Preparation and application of modified nano-hydroxyapatite adsorbing material

A nano-hydroxyapatite and adsorption material technology, applied in the direction of adsorption of water/sewage treatment, restoration of polluted soil, water/sludge/sewage treatment, etc., can solve the problem of slow growth of potatoes and oats, difficulty in accurate treatment range, Slow down the growth of crops and other problems, to achieve the effect of reducing the cost of removal, simple preparation steps, and high adsorption capacity

Inactive Publication Date: 2019-10-18
南京恒泰环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive concentration of nickel ions can easily lead to slow growth of crops. It is more common that when the concentration of nickel ions is in the range of 15-30ppm, it will lead to slow growth of sugar beets, tomatoes, potatoes and oats
At present, the traditional methods of treating heavy metal-contaminated soil are often used for biological extraction to remove heavy metal ions and change the occurrence state of ions. However, these methods also have problems such as long processing cycles and difficult to accurately treat the range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Make a solution of calcium nitrate tetrahydrate and ammonium dihydrogen phosphate at a mass ratio of 1.5:1. In the case of magnetic stirring, the ammonium dihydrogen phosphate solution was slowly dropped into the calcium nitrate solution to form a white flocculent precipitate. At the same time, continue to adjust the pH to an alkaline environment with ammonia water, age for one day, take it out and wash it with distilled water until it is neutral. Freeze-dried, ground and sieved to obtain hydroxyapatite.

[0034] Take 10g of tetrabutyl titanate completely dissolved in 50ml of ethanol, add 100ml of deionized water, put the solution in a 500ml beaker, stir it magnetically for 60min, then put it in a water bath at 75°C and heat it for 1h. Filter and dry naturally to obtain nano-titanium dioxide.

[0035] Add 50ml of distilled water to a beaker containing 0.1g nano-titanium dioxide, use 50W ultrasonic dispersion to form a dispersion liquid, add hydroxyapatite solution to t...

Embodiment 2

[0038] Make a solution of calcium nitrate tetrahydrate and ammonium dihydrogen phosphate at a mass ratio of 1.5:1. In the case of magnetic stirring, the ammonium dihydrogen phosphate solution was slowly dropped into the calcium nitrate solution to form a white flocculent precipitate. At the same time, continue to adjust the pH to an alkaline environment with ammonia water, age for one day, take it out and wash it with distilled water until it is neutral. Freeze-dried, ground and sieved to obtain hydroxyapatite.

[0039]Take 10g of tetrabutyl titanate completely dissolved in 50ml of ethanol, add 100ml of deionized water, put the solution in a 500ml beaker, stir it magnetically for 60min, then put it in a water bath at 75°C and heat it for 1h. Filter and dry naturally to obtain nano-titanium dioxide.

[0040] Add 300ml of distilled water to a beaker containing 5g of nano-titanium dioxide, use 80W ultrasonic dispersion to form a dispersion liquid, add nano-hydroxyapatite solutio...

Embodiment 3

[0043] Make a solution of calcium nitrate tetrahydrate and ammonium dihydrogen phosphate at a mass ratio of 1.5:1. In the case of magnetic stirring, the ammonium dihydrogen phosphate solution was slowly dropped into the calcium nitrate solution to form a white flocculent precipitate. At the same time, continue to adjust the pH to an alkaline environment with ammonia water, age for one day, take it out and wash it with distilled water until it is neutral. Freeze-dried, ground and sieved to obtain hydroxyapatite.

[0044] Take 10g of tetrabutyl titanate completely dissolved in 50ml of ethanol, add 100ml of deionized water, put the solution in a 500ml beaker, stir it magnetically for 60min, then put it in a water bath at 75°C and heat it for 1h. Filter and dry naturally to obtain nano-titanium dioxide.

[0045] Add 50ml of distilled water to a beaker containing 0.1g nano-titanium dioxide, use 50W ultrasonic dispersion to form a dispersion liquid, add hydroxyapatite solution to t...

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PUM

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Abstract

The invention provides preparation and application of a modified nano-hydroxyapatite adsorbing material. The coupling effect of a magnetic stirrer and ultrasound is utilized to ensure that hydroxyapatite can be completely integrated into nanometer titanium dioxide dispersion, by controlling the parameters such as water bath refluxing time, a drying temperature and the reaction pH, the rate of loading of nanometer titanium dioxide by nano-hydroxyapatite is increased, and then the novel adsorbing material capable of simultaneously adsorbing various heavy metal ions and with a high adsorption rate is obtained, so that adsorption and removal of the heavy metal ions in soil are realized.

Description

technical field [0001] The invention relates to the preparation and application of a modified nano-hydroxyapatite adsorption material, and belongs to the field of soil restoration treatment. Background technique [0002] Hydroxyapatite (abbreviation: HAP, chemical symbol: Ca 10 (PO 4 ) 6 (OH) 2 ), is one of the most common forms of the calcium phosphate family, and its crystal form belongs to the hexagonal crystal system. Due to its special crystal structure, the HAP crystal structure has strong stability and is not easy to decompose. At the same time, HAP has the advantages of low synthesis temperature, good homogeneity of the product obtained after synthesis, and large specific surface area, and is often used as an adsorbent. [0003] In recent years, soil pollution by heavy metals has become an environmental issue that my country has focused on. Heavy metal ions such as: As 3+ 、Cu 2+ 、Cd 2+ 、Ni 2+ Once it invades the soil, it is easy to be transmitted along the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B09C1/00C02F1/28C02F101/20
CPCB01J20/048B01J20/06B09C1/00C02F1/281C02F2101/20
Inventor 关乾曾桂生李英朋陈德志周磊曾竹青
Owner 南京恒泰环保科技有限公司
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