Preparation of mixed glue nucleus solitarius shell-type fe3o4 nano solid phase extractive agent and application of the same

A solid-phase extraction agent and mixed micelle technology, which can be used in silicon compounds, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. Strong magnetic separation ability, oxidation prevention, good stability effect

Inactive Publication Date: 2008-02-27
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

But in practice, we find that Fe 3 o 4 Magnetic nanoparticles are easily oxidized under acidic

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  • Preparation of mixed glue nucleus solitarius shell-type fe3o4 nano solid phase extractive agent and application of the same

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[0026] The preparation method of iron oxide-alumina composite nanomaterial defluoridation agent can be divided into three steps in detail: 1. Preparation of nano iron oxide. First, 2.0g FeCl 3 .6H 2 O and 5.2 g FeCl 2 .4H 2O and 0.85mL of concentrated hydrochloric acid were dissolved in 25mL of N 2 In a degassed aqueous solution; under mechanical stirring, add the above solution dropwise to 250mL 1.5mol / L NaOH aqueous solution, as the reaction progresses, a black precipitate appears in the reaction solution; after the reaction, use an external magnetic field to remove the resulting precipitate Separated from the reaction medium. 2. Core-shell Fe 3 o 4 / SiO 2 Preparation of Magnetic Nanoparticles. will get Fe 3 o 4 Magnetic particles were redispersed into 200mL by N 2 of deionized water, heated to 80 °C, under N 2 Under protection and stirring conditions, drop 10mL 1mol / LNa 2 SiO 3 , and then dropwise add HCl solution with a concentration of 2mol / L to the solution...

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Abstract

The invention relates to a new mixed micelle core-shell SiO2/Fe3O4 nanometer solid phase extracting agent in the chemical analysis test instrument device field, which has the big specific surface area of the nanometer material, the strong magnetic separating property of the magnetic material, the good satiability of SiO2 shell layer and the good extraction property of the semi micelle and the absorption micelle, and is fit for the large scale batch preconditioning of bulk water sample, and has the small usage extracting agent, high efficient extraction, the simple operation, the high extracting speed, the friendly environment, the wide using range, the low cost and the reactivation property. Selecting bisphenol A(BPA), nonyl phenol(4-OP), octyl phenol (4-NP) as the represent of the hydrophobic pollution material and selecting perfluorine enanthic acid (PFHeA), perfluorooctanoic acid (PFOA), perfluorine octane sulfonic acid (PFOS), perfluorine n-nonanoic acid (PFDeA) or the like perfluorine compound as the represent of amphipathic nature pollution material, there are 0. 1g extracting agent and 50mg surface activator in 800ml environmental water simple, and the extracting ratio of the organic pollution materials is more than 90%.

Description

technical field [0001] The invention belongs to the field of chemical analysis testing instruments and equipment, and relates to a novel mixed micellar core-shell SiO 2 / Fe 3 o 4 Nano solid-phase extraction agent, which is used as a sample pretreatment material to enrich organic pollutants in large-volume environmental water samples. Background technique [0002] The background and development status of this technical field are roughly as follows: solid phase extraction is currently the most widely used new environmental sample pretreatment method. Solid phase extraction has the advantages of short extraction time, high recovery rate, high enrichment factor and low reagent consumption. Nanomaterials have a high specific surface area and excellent adsorption performance, but due to the fineness of the nanoparticles, it is difficult to carry out the above-mentioned solid-phase extraction and pass through the column. Superparamagnetic Fe 3 o 4 Magnetic nanomaterials have ...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/06C02F1/28C02F101/30
Inventor 蔡亚岐赵晓丽
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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