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Preparation method of modified sepiolite supported nano iron material

A sepiolite and nano-iron technology, which is applied in inorganic chemistry, adsorbed water/sewage treatment, non-metallic elements, etc., can solve the problems of high raw material price, poor high temperature resistance performance of materials, complicated preparation process, etc., and achieves the preparation method. Simple, reduce the probability of reunion, the effect of rich resources

Inactive Publication Date: 2012-08-01
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a modified sepiolite-loaded nano-iron material in order to solve the problems of complex preparation process, high raw material price and poor high-temperature resistance of the material in the existing loaded nano-iron material

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  • Preparation method of modified sepiolite supported nano iron material
  • Preparation method of modified sepiolite supported nano iron material
  • Preparation method of modified sepiolite supported nano iron material

Examples

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specific Embodiment approach 1

[0015] Specific embodiment 1: The preparation method of modified sepiolite-loaded nano-iron material in this embodiment is realized according to the following steps:

[0016] 1. Add 100-150 mesh sepiolite powder into sulfuric acid with a concentration of 0.5mol / L for acidification according to the solid-liquid ratio of 1:10, stir at a speed of 120-130r / min for 3-4 hours, and then Activation at 105°C for 2 to 3 hours, and then calcined at 600 to 700°C for 2 to 3 hours to obtain modified sepiolite;

[0017] 2. Take 2g of modified sepiolite and put it into a 250mL conical flask, then add 50mL of Fe 2+ Concentration of 0.05 ~ 0.20mol FeSO 4 Aqueous solution, stirred at a speed of 150-160r / min for 5-6h to obtain FeSO 4 - sepiolite mixed solution;

[0018] 3. Take 50mL of KBH with a concentration of 0.10-0.30mol 4 aqueous solution and added dropwise to FeSO 4 - In the sepiolite mixed solution, stir at a speed of 150-160r / min under the protection of nitrogen at the same time, co...

Embodiment

[0024] The preparation method of the modified sepiolite-loaded nano-iron material is realized according to the following steps:

[0025] 1. Add 130-mesh sepiolite powder into sulfuric acid with a concentration of 0.5mol / L for acidification according to the ratio of solid to liquid ratio of 1:10, stir at a speed of 120r / min for 3h, and then activate at 105°C for 2h. Calcined at 600°C for 2 hours to obtain modified sepiolite;

[0026] 2. Take 2g of modified sepiolite and put it into a 250mL conical flask, then add 50mL of Fe 2+ Concentration of 0.10mol FeSO 4 aqueous solution, stirred at a speed of 150r / min for 6h to obtain FeSO 4 - sepiolite mixed solution;

[0027] 3. Take 50mL of KBH with a concentration of 0.20mol 4 aqueous solution and added dropwise to FeSO 4 -In the sepiolite mixed solution, stir at a speed of 150r / min under the protection of nitrogen simultaneously, continue to stir for 30min after the dropwise addition, then use a vacuum filter pump to filter the m...

specific Embodiment approach 2

[0032] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, 120 mesh sepiolite powder is added to sulfuric acid with a concentration of 0.5 mol / L according to the solid-to-liquid ratio of 1:10 for acidification. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides a preparation method of a modified sepiolite supported nano iron material, solving the problems of the conventional supported nano iron material, such as complicated preparation process, high raw material price and poor high-temperature resistance performance. The preparation method comprises the following steps of: 1, acidizing, activating and calcining sepiolite powder to obtain modified sepiolite; 2, preparing a FeSO4-sepiolite mixed solution; and 3, adding a KBH4 aqueous solution into the FeSO4-sepiolite mixed solution, stirring under the protection of nitrogen, filtering, washing and drying to finally obtain the modified sepiolite supported nano iron material. According to the invention, the preparation method is simple, the used raw materials are low in price and easy to get, the production is carried out at normal pressure and temperature and the practical production requirements are met; and the prepared modified sepiolite supported nano iron material can effectively remove nonbiodegradable organic pollutants out of water bodies, and the tannin removal rate is high up to 91.4% and direct fast black removal rate is high up to 98.9%.

Description

technical field [0001] The invention relates to a preparation method of nanometer iron material. Background technique [0002] Nano-iron has the advantages of small scale, large surface effect, strong adsorption and reduction ability, etc., and can quickly and effectively treat a variety of environmental pollutants, such as polychlorides, aromatic hydrocarbons, pesticides, nitrobenzene compounds, arsenic and dyes Wait. Compared with the traditional ordinary zero-valent iron method, nano-iron technology has the advantages of high reactivity, fast reaction rate, short treatment cycle and high treatment efficiency in the treatment of pollutants. However, nano-iron particles are prone to agglomeration, and are easily oxidized when exposed to air, forming a core-shell structure with an iron oxide surface, which reduces the removal efficiency of nano-iron. Therefore, immobilized nano-iron technology has become one of the hot issues in current research. At present, there are fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10C02F1/28C02F1/70
Inventor 李伟光宿程远刘兴哲李云蓓
Owner HARBIN INST OF TECH
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