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Composite material for treating wastewater and preparation method thereof

A technology for wastewater treatment and composite materials, which is used in adsorption water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Unable to meet the industrial production requirements and other problems, to achieve the effect of easy control of conditions, efficient adsorption of heavy metals in wastewater, and high dispersion load

Inactive Publication Date: 2015-04-22
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

J.Go mez Morales reported a method of loading hydroxyapatite on the conductor by induction heating, but this method can only load hydroxyapatite on the surface of the sample, which is difficult to form inside the porous body, and the method It is also not suitable for large-volume conductors to load hydroxyapatite, which cannot meet the requirements of industrial production

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  • Composite material for treating wastewater and preparation method thereof

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preparation example Construction

[0020] Correspondingly, the embodiment of the present invention provides a method for preparing a composite material for wastewater treatment with simple process, controllable composition, and easy industrial scale production. The process flow of this method is as figure 1 As shown, it includes the following steps:

[0021] S01: Degreasing and cleaning the above-mentioned porous conductor;

[0022] S02: Preparation of hydroxyapatite precursor: place the porous conductor in step S01 between capacitive plates that can emit radio frequency waves, and let the mixed solution containing calcium salt solution and dihydrogen phosphate solution flow through the pores Conductor, the hydroxyapatite precursor is obtained after thermal deposition by radio frequency electromagnetic waves;

[0023] S03: Preparation of porous conductor loaded with hydroxyapatite layer: put the porous conductor loaded with hydroxyapatite precursor in an aqueous alkali solution at a temperature of 80-280°C fo...

Embodiment 1

[0030] The composite material for wastewater treatment in this embodiment includes a porous conductor and a hydroxyapatite layer combined on the outer surface and pore surface of the porous conductor, and the thickness of the hydroxyapatite layer is 1 μm; wherein, the porous conductor is 10 μm. ×10×10mm 3 Titanium foam. The preparation method of the composite material for waste water treatment is as follows:

[0031] S11: Use a commercially available degreasing agent for 10×10×10mm 3 Titanium foam for degreasing, followed by ultrasonic cleaning with deionized water;

[0032] S12: Preparation of hydroxyapatite precursor: place the titanium foam treated in step S11 between the capacitive plates that can emit radio frequency waves, and at the same time let the calcium chloride with a concentration of 0.2mol / L and a concentration of 0.12mol / L The flowing mixed aqueous solution of ammonium dihydrogen phosphate passes through the titanium foam, and the titanium foam is heated by ...

Embodiment 2

[0035] The composite material for wastewater treatment in this embodiment includes a porous conductor and a hydroxyapatite layer bonded to the outer surface of the porous conductor and the pore surface, and the thickness of the hydroxyapatite is 50 μm; wherein the porous conductor is carbon felt.

[0036] The preparation method of the composite material for waste water treatment is as follows:

[0037] S21: Degrease the carbon felt with a commercially available degreasing agent, and then ultrasonically clean it with deionized water;

[0038] S22: Preparation of hydroxyapatite precursor: place the carbon felt treated in step S21 in the middle of the capacitor plate that can emit radio frequency waves, and at the same time let the calcium nitrate with a concentration of 0.4mol / L and the phosphoric acid with a concentration of 0.24mol / L The flowing mixed aqueous solution of sodium dihydrogen passes through the carbon felt, and the carbon felt is heated by radio frequency waves w...

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Abstract

The invention discloses a composite material for treating wastewater and a preparation method of the composite material. The composite material for treating the wastewater comprises a porous conductive body and a hydroxyl phosphorite layer combined with the outer surface of the porous conductive body and the surface of a pore, wherein the thickness of the hydroxyl phosphorite layer is 1-100 microns. The composite material for treating the wastewater takes the porous conductive body as a base body; a calcium salt solution and a dihydric phosphate solution are mixed and flow through the porous conductive body; a radio frequency wave is used for heating and depositing; an alkaline water solution is used for carrying out hydro-thermal treatment to obtain the porous conductive body loaded with the hydroxyl phosphorite layer, which has dense junction force and wide junction surface; and components are controllable, so that industrial scale production can be easily realized.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a composite material for wastewater treatment and a preparation method thereof. Background technique [0002] Industrial wastewater, especially heavy metal wastewater, is one of the main sources of environmental pollution. Mining, mineral processing, smelting, electroplating, chemical, leather and paper industries produce lead, mercury, cadmium, chromium, nickel, copper, After the wastewater of heavy metals such as zinc is discharged into natural water bodies, it not only poses a threat to aquatic organisms, but also destroys the ecological environment, thereby endangering human health. In my country, heavy metal pollution is particularly serious. In 2011, the "Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution" became the first special plan for the "Twelfth Five-Year Plan" approved by the State Council. [0003] Hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/20B01J20/30C02F1/28C02F101/20
Inventor 熊信柏
Owner SHENZHEN UNIV