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Preparing method of charcoal-hydroxyapatite nanocomposite material

A nano-composite material, hydroxyapatite technology, applied in the field of environmental pollution control, can solve the problems of human health and ecological environment hazards, long-term toxicity, etc., to achieve effective, stable performance, and low phosphorus release. Effect

Inactive Publication Date: 2017-05-31
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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Problems solved by technology

Heavy metal ions will accumulate in organisms through the food chain, and their toxicity will exist for a long time, which is very likely to cause serious harm to human health and the ecological environment

Method used

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  • Preparing method of charcoal-hydroxyapatite nanocomposite material
  • Preparing method of charcoal-hydroxyapatite nanocomposite material
  • Preparing method of charcoal-hydroxyapatite nanocomposite material

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, the centrifuge device of the embodiment of the present invention is described in further detail:

[0025] The invention is a method for biochar-hydroxyapatite nanocomposite material to adsorb lead-copper-zinc mixed solution, comprising the following steps:

[0026] (1) Biochar preparation method: carbonized raw rice straw is taken from Yangdu Experimental Base, Haining County, Jiaxing City, Zhejiang Province, washed with tap water, air-dried, and placed in a plastic bag for later use; the firing of biochar is carbonization with limited oxygen and temperature control The raw material rice straw was heated at 500°C for 3 hours without oxygen to obtain biochar, which was taken out after natural cooling to room temperature, and the carbonized product was dried in an oven at 80°C for 24 hours, ground and passed through a 60-mesh sieve, and then transferred to a plastic bag for storage. marked as BC;

[0027] (2) Preparation of...

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Abstract

The invention relates to a method of adsorbing a lead-copper-zinc mixed solution with a charcoal-hydroxyapatite nanocomposite material. Rice straw is adopted as a carbonized raw material to carry nano-hydroxyapatite and is used for adsorbing the lead-copper-zinc mixed solution. Compared with the prior art, the method of adsorbing the lead-copper-zinc mixed solution with the charcoal-hydroxyapatite nanocomposite material has the advantages that the charcoal-hydroxyapatite nanocomposite material used for adsorbing the heavy metal lead-copper-zinc mixed solution is prepared by adopting nano-hydroxyapatite as a center material and conducting hypoxia high temperature carbonization on the rice straw; after a phosphonio charcoal material is thrown into the lead-copper-zinc mixed solution, lead-copper-zinc is adsorbed by charcoal, the phosphonio charcoal material is stable in performance, nano-hydroxyapatite powder bodies wrapped with charcoal are released slowly, long-term effectiveness can be maintained, meanwhile phosphorus release amount is not large, and thus water body eutrophication cannot be caused.

Description

technical field [0001] The invention relates to the field of environmental pollution control, in particular to a method for preparing a biochar-hydroxyapatite nanocomposite material. Background technique [0002] Biochar is a kind of carbon-containing, stable and highly aromatized new environmental functional material obtained by thermal cracking of biomass under anoxic or anaerobic conditions. It has great application potential in repairing heavy metal polluted environment. The natural porous structure of biochar has a strong adsorption capacity for toxic heavy metals. Through adsorption and fixation, the toxic substances are fixed on the microporous surface of the carbon, thereby reducing the chemical activity and toxicity of these pollutants in the soil and achieving long-term detoxification. The purpose of remediation of contaminated soil. Applying biochar to the soil can also increase soil organic matter, improve soil fertility, and increase crop production to a certai...

Claims

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Application Information

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IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/20
CPCB01J20/20B01J20/048C02F1/283C02F2101/20
Inventor 汪玉瑛刘玉学吕豪豪杨生茂
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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