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Preparing and applications of ferric oxide-alumina compound nanophase defluoridation material

A nanomaterial, alumina technology, applied in other chemical processes, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of easy clogging of the filter membrane, unsuitable for treatment, slow flow rate, etc., and achieve adsorption capacity. High, excellent defluorination performance, simple preparation effect

Inactive Publication Date: 2008-07-30
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

However, in practical applications, due to the small particle size of nanoparticles, the method of passing through the column or filtering has the disadvantages of large resistance, slow flow rate, and easy clogging of the filter membrane, which is not suitable for the treatment of large volumes of water samples.

Method used

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  • Preparing and applications of ferric oxide-alumina compound nanophase defluoridation material
  • Preparing and applications of ferric oxide-alumina compound nanophase defluoridation material

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Embodiment Construction

[0023] The following is attached figure 1 , the preparation method of iron oxide-alumina composite nanomaterial defluoridation agent is described in detail as follows: 1. Under alkaline conditions, FeCl 3 ·6H 2 O and FeCl 2 4H 2 O was co-precipitated with a molar ratio of 2:1 to form nanoparticles. 2. Fe will be obtained 3 o 4 Magnetic particles are used by N 2 Gas deionized water was washed to pH=9.0, and the obtained nano-Fe 3 o 4 The particles were transferred into a three-necked bottle, 300ml of deionized water was added, and 1MAl(NO 3 ) 3 solution, the solution is weakly acidic, adjusted to neutral with NaOH, heated in a water bath at 80° C. for 1 h, and the entire reaction process was carried out under the condition of nitrogen protection. Fe:Al=2:3 of the composite nanomaterial. 3. Repeatedly washing the obtained nano-iron oxide-alumina composite material with deionized water can obtain a nano-material that can be used to remove fluorine ions in drinking wate...

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Abstract

The invention pertains to the field of chemical analysis test equipment, relating to a novel composite material of nano iron oxide-alumina which is used as an sorbent for removing fluoride from water to remove the fluoride from the large amount of drinking water; the fluorin content after the treatment is lower than the content of national standard; compared with the traditional defluorinating agent, the invention has the advantages of simple structure, low cost, high sorption capacity and fast removing speed. As a novel magnetic nano material, the defluorinating agent can realize the separation of extraction agent and base solution under the condition of external magnetic field. The surface of the nano iron oxide is coated with a layer of Al(OH)3; F<-> and Al<3+> in the water to form a complex compound which settles down to realize the effect of defluorination; 1L of water sample only consumes the defluorinating agent of 0.1g; to high fluorin content water with concentration of 20mg / L, the concentration after defluorination can be less than 1mg / L, which can well meet requirement with the reproducibility of analysis result RSD being less than 7 percent.

Description

technical field [0001] The invention belongs to the field of chemical analysis testing instruments and equipment, and relates to a novel nano-iron oxide-alumina composite material, which is used as an adsorbent for removing fluorine ions in water to remove fluoride ions in large-volume drinking water. Background technique [0002] The background and development status of this technical field are roughly as follows: fluorine widely exists in natural water bodies, and the sanitary standard of drinking water in my country stipulates that the content of fluoride in drinking water should not exceed 1.0 mg / L. Excessive intake of fluorine will damage human health. Therefore, the development of efficient, cheap and stable adsorbents is of great significance for the deep defluorination treatment of fluoride-containing wastewater, fluoride-containing water in high-fluoride areas, and urban drinking water [1]. At present, there are many methods for removing fluoride in drinking water a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08C02F1/28C02F1/58
Inventor 蔡亚岐赵晓丽王杰明
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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