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Strong-magnetic hydroxyapatite heavy metal adsorption material and preparation method thereof

A technology of hydroxyapatite and adsorption materials, applied in the field of environmental governance, can solve the problems of reduced heavy metal adsorption capacity, limited industrialization and application, complex preparation process, etc., and achieves the advantages of recycling and reuse, easy control, and simple preparation process Effect

Inactive Publication Date: 2019-01-15
HUATIAN ENG & TECH CORP MCC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, it is generally used to prepare magnetic materials and hydroxyapatite first, and then use physical and mechanical mixing to prepare magnetic hydroxyapatite. From a microscopic point of view, the force between the two materials is poor and the distribution is uneven, so the specific surface area is reduced. , the adsorption capacity of heavy metals is reduced, and the preparation process is complicated and the energy consumption is high, which limits its industrialization and application

Method used

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  • Strong-magnetic hydroxyapatite heavy metal adsorption material and preparation method thereof
  • Strong-magnetic hydroxyapatite heavy metal adsorption material and preparation method thereof
  • Strong-magnetic hydroxyapatite heavy metal adsorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] (1) preparation of ferric oxide

[0082] Step 1: Prepare 100ml of 2M sodium hydroxide solution and 100ml of 1M ferrous sulfate solution;

[0083] Step 2: Put 200ml of water into a 500ml beaker, aerate and stir at an aeration rate of 1L / min, and heat to 60°C;

[0084] Step 3: Add sodium hydroxide and ferrous sulfate solution dropwise to the beaker of step 2 at the same time to maintain pH10;

[0085] Step 4: After the ferrous sulfate solution has been added dropwise, react with constant temperature aeration for 2 hours to obtain ferric oxide emulsion;

[0086] (2) Preparation of Magnetic Hydroxyapatite

[0087] Step 5: Prepare 50ml of calcium chloride solution with a concentration of 1.67M and 50ml of a 1M disodium hydrogen phosphate solution;

[0088] Step 6: heat the above iron ferric oxide emulsion to 60°C under stirring;

[0089] Step 7: Add calcium chloride solution and disodium hydrogen phosphate solution dropwise at the same time, and maintain pH 10 with lye; ...

Embodiment 2

[0094] In the same method as in Example 1, step 1 uses a ferrous chloride solution with a concentration of 1M to replace the ferrous sulfate solution with a concentration of 1M, and the remaining methods are the same as in Example 1 to obtain material 2.

Embodiment 3

[0096] In the same method as in Example 1, in step 7, a 1.67M calcium nitrate solution was used instead of a 1.67M calcium chloride solution, and the remaining methods were the same as in Example 1 to obtain material 3.

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Abstract

The invention belongs to the field of environmental control, and relates to a strong-magnetic hydroxyapatite heavy metal adsorption material and a preparation method thereof. The method adopts the technology of one-pot method and two-stage: in the first stage, under stirring of aeration, ferrite is added dropwise to react with alkali to generate a ferroferric oxide magnetic material; and in the second stage, hydroxyapatite is loaded on the surface of the ferroferric oxide magnetic material to generate the magnetic hydroxyapatite. The preparation technology is simple and easy to control, does not use any organic solvents, is environmentally friendly, low in manufacturing cost, and is suitable for large-scale production and application. The prepared magnetic hydroxyapatite has the characteristics of being high in magnetism, evenly and firmly coating, and good in dispersibility, and can be applied to treatment of heavy metal polluted wastewater, soil, solid waste and the like.

Description

technical field [0001] The invention belongs to the field of environmental treatment, and relates to a strong magnetic hydroxyapatite heavy metal adsorption material and a preparation method thereof, which can be used for treatment of heavy metal polluted water, soil and solid waste, and realize magnetic separation and recycling. Background technique [0002] With the development of the economy and the rapid growth of industry, the environmental problems caused by the water pollution caused by heavy metals are becoming more and more serious. The sources of heavy metal pollution in the water environment mainly include the following three sources: 1) industrial pollution, industrial wastewater such as textile wastewater, papermaking wastewater, smelting wastewater and light industrial wastewater are discharged into sewers, ditches, rivers, lakes and seas without treatment; 2) Agricultural pollution, the use of a large amount of chemical fertilizers, pesticides, and veterinary ...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/28B01J20/30C02F1/28B09C1/00C02F101/20C02F101/22
CPCB01J20/048B01J20/28009B01J20/3085B09C1/00C02F1/281C02F2101/103C02F2101/20C02F2101/22
Inventor 高卫民程寒飞詹茂华陈志刚
Owner HUATIAN ENG & TECH CORP MCC
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