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Preparation method of mesoporous ferric hydroxide adsorbent used for adsorbing highly toxic pollutant Cr(VI)

A mesoporous hydroxyl and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of cumbersome process, low utilization rate of raw materials, difficult control of reaction conditions, etc., and achieve the preparation method. Simple, fast adsorption kinetics, cheap raw materials

Inactive Publication Date: 2015-12-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has serious disadvantages such as the use of a large amount of organic solvents, low utilization rate of raw materials, cumbersome process, and difficult control of reaction conditions.

Method used

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  • Preparation method of mesoporous ferric hydroxide adsorbent used for adsorbing highly toxic pollutant Cr(VI)
  • Preparation method of mesoporous ferric hydroxide adsorbent used for adsorbing highly toxic pollutant Cr(VI)
  • Preparation method of mesoporous ferric hydroxide adsorbent used for adsorbing highly toxic pollutant Cr(VI)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 8.14gFe(NO 3 ) 3 9H 2 O was dissolved in a small amount of distilled water and made to volume in a 100mL volumetric flask to obtain solution A; 4.02g of urea was dissolved in a small amount of distilled water and made to volume in a 100mL volumetric flask to obtain solution B; 2.0g of P123 was added to 40mL of absolute ethanol , and stirred for 30 min to obtain solution C. Then, solution C was mixed with solution A and solution B in a beaker respectively (Fe in the mixed solution 3+ The concentration is 0.084mol / L, the concentration of urea is 0.279mol / L, the concentration of P123 is 0.025mol / L), after stirring evenly, it is transferred to a drying oven at 85°C for heating for 15h. After the reaction, the reaction product cooled to room temperature was centrifuged, and the precipitate was isolated for the first time, and distilled water was added to wash and separate (the centrifuge speed was set at 5000r / min), and the operation was repeated twice; then dehydrated al...

Embodiment 2

[0034] 4.0394gFe 2 (SO 4 ) 3 Dissolve in a small amount of distilled water and dilute to volume in a 100mL volumetric flask to obtain solution A; dissolve 4.0502g urea in a small amount of distilled water and dilute to volume in a 100mL volumetric flask to obtain solution B; add 2.26g of P123 to 40mL of absolute ethanol, Stir for 30 min to obtain solution C. Then, solution C was mixed with solution A and solution B in a beaker respectively (Fe in the mixed solution 3+The concentration is 0.008mol / L, the concentration of urea is 0.281mol / L, the concentration of P123 is 0.0283mol / L), after stirring evenly, transfer it to a drying oven at 80°C for heating for 16h. After the reaction, the reaction product cooled to room temperature was centrifuged, the precipitate was isolated for the first time, and distilled water was added to wash and separate (the speed of the centrifuge was set at 5000r / min), and the operation was repeated twice; Set to 7000r / min), repeat the operation th...

Embodiment 3

[0037] 0.65gFeCl 3 Dissolve in a small amount of distilled water and make up to volume in a 100mL volumetric flask to obtain solution A; dissolve 6.04g of urea in a small amount of distilled water and make up to volume in a 100mL volumetric flask to obtain solution B. Add 2.3g of P123 to 40ml of absolute ethanol and stir for 30min to obtain solution C. Then, solution C was mixed with solution A and solution B in a beaker respectively (Fe in the mixed solution 3+ The concentration is 0.0167mol / L, the concentration of urea is 0.419mol / L, the concentration of P123 is 0.0288mol / L), after stirring evenly, transfer it to a drying oven at 100°C for heating for 3h. After the reaction, the reaction product cooled to room temperature was centrifuged, the precipitate was isolated for the first time, and distilled water was added to wash and separate (the speed of the centrifuge was set at 5000r / min), and the operation was repeated twice; Set to 7000r / min), repeat the operation three ti...

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Abstract

The invention relates to a preparation method of a mesoporous ferric hydroxide adsorbent used for adsorbing a highly toxic pollutant Cr(VI). The method comprises the steps of mixing an inorganic ferric salt solution, a urea solution and an ethanol solution of Pluronic triblock copolymer P123 or F127, stirring uniformly, and then heating in a drying box, thus obtaining turbid liquid of the mesoporous ferric hydroxide-Pluronic triblock copolymer; and carrying out centrifugal separation, distilled water washing, ethanol washing and vacuum drying on the turbid liquid in sequence at room temperature, thus preparing the adsorbent. The preparation method has the remarkable advantages of simplicity, convenience, moderate conditions, cheap materials which are easily available and the like. The prepared mesoporous ferric hydroxide adsorbent has relatively high adsorbing amount and relatively rapid adsorption kinetics on Cr(VI), and can be recycled after regeneration.

Description

technical field [0001] The invention relates to the technical field of preparation and application of fine chemical iron oxyhydroxide materials, in particular to a preparation method and application of mesoporous iron oxyhydroxide for adsorption of highly toxic pollutant Cr(VI). Background technique [0002] Heavy metal chromium pollution mainly comes from mining, electroplating, leather tanning and other industrial wastewater and landfill leachate. The valence states of chromium in the water environment are mainly Cr(III) and Cr(VI). The toxicity of chromium compounds in different valence states is different, especially that of Cr(VI) is the most toxic. Industrial wastewater containing Cr(VI) is likely to cause chromium pollution in surface water and groundwater, causing serious harm to the ecological environment. According to data from the Ministry of Environmental Protection, more than 10 million tons of grains are reduced each year due to heavy metal pollution. Among th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 蔡卫权田勇罗晓雷施飞孙珊珊刘强许星星王文旋
Owner WUHAN UNIV OF TECH
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