Preparation method and application of strontium-doped hydroxyapatite heavy metal adsorption material

A strontium hydroxyapatite and adsorption material technology, which is applied in the field of preparation of strontium-doped hydroxyapatite heavy metal adsorption materials, can solve the problems of complex artificial synthesis, complex preparation process, and slow adsorption rate, and achieve good controllability of the reaction , Simple preparation process and low crystallinity

Inactive Publication Date: 2020-04-14
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

At present, natural hydroxyapatite, synthetic hydroxyapatite and modified hydroxyapatite have been studied a lot at home and abroad, but their artificial synthesis is relatively complicated, the adsorption capacity is small, and the adsorption rate is slow. Wide application of apatite
At present, the methods for preparing hydroxyapatite mainly include precipitation method, microemulsion method, self-combustion method, etc. These methods have more or less disadvantages such as high cost, complicated preparation process, long cycle, and harsh conditions.

Method used

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  • Preparation method and application of strontium-doped hydroxyapatite heavy metal adsorption material
  • Preparation method and application of strontium-doped hydroxyapatite heavy metal adsorption material
  • Preparation method and application of strontium-doped hydroxyapatite heavy metal adsorption material

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Embodiment

[0018] (1) Preparation of precursor solution: prepare 0.2mol / L calcium nitrate (Ca(NO 3 ) 2 4H 2 O), 0.2mol / L diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ) and 0.2mol / L strontium nitrate (Sr(NO 3 ) 2 ); Take 250mL each of the prepared calcium nitrate and strontium nitrate solutions and mix evenly.

[0019] (2) Add 300mL of the prepared diammonium hydrogen phosphate solution, and quickly add ammonia water to adjust the pH to 10.5. During this process, the mixed solution should be stirred rapidly.

[0020] (3) After magnetically stirring the obtained milky white suspension for 30 minutes, it was aged in a water bath at 50°C for 24 hours.

[0021] (4) Centrifuge and wash the white precipitate after aging three times with ethanol and water, dry it in an oven at 80°C for 24 hours, and grind the obtained white solid through a 100-mesh sieve to obtain strontium-doped hydroxyapatite heavy metal Adsorbent material.

[0022] The strontium-doped hydroxyapatite heavy metal ads...

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Abstract

The invention discloses a preparation method and application of a strontium-doped hydroxyapatite heavy metal adsorption material. Calcium nitrate is used as a calcium source, diamine hydrogen phosphate is used as a phosphorus source, strontium nitrate of different volumes is doped into the calcium nitrate and the diamine hydrogen phosphate, and the strontium-doped hydroxyapatite is prepared through hydrothermal homogeneous precipitation reaction. The doping of strontium can change the performance defects of hydroxyapatite to a certain extent, and improve the adsorption capacity of hydroxyapatite to heavy metal wastewater. A hydrothermal homogeneous precipitation method is adopted for synthesis, the reaction controllability is good, the preparation process is simple, operation is convenient, the yield is large, and no pollution is caused to the environment.

Description

technical field [0001] The invention belongs to the technical field of heavy metal sewage treatment, in particular to a preparation method and application of a strontium-doped hydroxyapatite heavy metal adsorption material. Background technique [0002] Heavy metals are one of the main pollutants in the water environment. Heavy metals in water mainly include mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), manganese (Mn), copper ( Cu), zinc (Zn), cobalt (Co), nickel (Ni), etc. With the development of my country's economy and society, the shortage of water resources and water pollution are becoming more and more serious. Relevant statistics show that my country's metal wastewater accounts for about 10% of the total wastewater discharge, and human factors such as mining, smelting, electroplating, sewage irrigation, and the use of heavy metal products exceeding the standard are the main sources of heavy metal wastewater, which is potentially harmful, especia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/30C02F1/28C02F101/20
CPCB01J20/048B01J20/3085C02F1/281C02F2101/20
Inventor 张立浩何豪朱宗强朱义年莫南方雅莉赵宁宁玄惠宁魏婉莹陈彦旭唐沈
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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