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Preparation method of hydroxyapatite/bagasse active carbon

A hydroxyapatite and activated carbon technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as limited adsorption effect, reduce production costs, improve performance indicators, and the process is simple and easy. row effect

Active Publication Date: 2014-06-18
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Activated carbon is an excellent adsorbent, but its adsorption effect on cadmium and lead is limited

Method used

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  • Preparation method of hydroxyapatite/bagasse active carbon
  • Preparation method of hydroxyapatite/bagasse active carbon
  • Preparation method of hydroxyapatite/bagasse active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] (1) Dry the bagasse in an oven at 80°C, crush it with a universal crusher and pass it through a 20-mesh sieve for later use.

[0018] (2) Add 250 ml of calcium acetate solution with a concentration of 0.2 mol / L to a 2L beaker, and add enter 250 ml ammonium acetate buffer solution with a concentration of 4.4 mol / L, mix well, add 50 g of bagasse obtained in step (1), stir electrically, vibrate with ultrasonic wave for 30 minutes, and let stand for 24 hours.

[0019] (3) Add 500ml ammonium dihydrogen phosphate solution with a concentration of 0.06mol / L to the product obtained in step (2) under rapid stirring, and use an automatic titrator to slowly add ammonia water with a mass percentage concentration of 10% under stirring. The pH of the reaction was adjusted to 7.5 and stirred at room temperature for 10 minutes.

[0020] (4) Place the product obtained in step (3) in a constant temperature water bath, cover the glass watch glass, heat the water bath to 100°C, and react f...

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Abstract

The invention discloses a preparation method of hydroxyapatite / bagasse active carbon. The preparation method comprises the following steps: adding 250ml of 4.4mol / L ammonium acetate buffering solution into 250ml of 0.05mol / L-0.5mol / L of calcium acetate solution, uniformly mixing, then adding 10-60g of bagasse, electrically stirring, then carrying out ultrasonic oscillation for 30-60 minutes, and standing for 24-48 hours; under rapid stirring, adding 500ml of 0.015mol / L-0.15mol / L ammonium dihydrogen phosphate solution into a mixture of calcium acetate, ammonium acetate and bagasse, adjusting the pH value to be 7.5-8.0, and stirring for 10 minutes under the room temperature; heating to be 100 DEG C by adopting water bathing, reacting for 48-60 hours, and obtaining hydroxyapatite / bagasse mixed and suspended matter solution; naturally cooling, filtering, washing, and drying for 16 hours under the temperature of 70 DEG C to obtain hydroxyapatite / bagasse mixture; carrying out carbonization under the temperature of 450-650 DEG C, then grinding, and screening by a 100-mesh sieve. The preparation method disclosed by the invention is simple in process and low in cost; and the obtained product can be widely applied to the deep-treatment procedure of waste water containing cadmium and lead in an industrial and mining enterprise.

Description

technical field [0001] The invention relates to a preparation method of hydroxyapatite / bagasse activated carbon. Background technique [0002] With the rapid development of modern industry, the discharge of heavy metal wastewater containing cadmium and lead is increasing, and the pollution of heavy metals has become one of the most serious environmental problems. Therefore, the treatment of heavy metal wastewater containing cadmium and lead is urgent. Among the many heavy metals, cadmium ions are one of the most toxic and most harmful to human health. When cadmium ions accumulate in the human body to a certain dose, it is easy to cause lesions in the kidneys, intestines, and bones of the human body. The harm of lead ions to the human body is quite extensive. If the human body takes too much lead, it will cause lead anemia and serious damage to the nervous system, bone hematopoietic system, digestive system, kidney and reproductive system. The current methods for treating he...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 梁美娜朱义年王敦球朱宗强黄道琳
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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