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Preparation method and application of functionalized nanometer ferrihydrite

A nano-water, functionalized technology, applied in the direction of chemical instruments and methods, inorganic chemistry, water pollutants, etc., can solve the problems of limited pollutant removal capacity, perishable, low activity of ferrihydrite, etc., to achieve remarkable removal effect, The effect of low production cost and strong ability to adsorb pollutants

Active Publication Date: 2018-10-23
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, synthetic ferrihydrite is low in activity and perishable, and the ability of synthetic ferrihydrite materials to remove pollutants is still limited.

Method used

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  • Preparation method and application of functionalized nanometer ferrihydrite
  • Preparation method and application of functionalized nanometer ferrihydrite
  • Preparation method and application of functionalized nanometer ferrihydrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dry the fresh laurel leaves at 60°C for 24 hours, crush them and pass them through a 60-mesh sieve. Weigh 10 g of bay leaf powder, put it into 1000 ml of distilled water, soak for 2 h, and stir to form a homogenate. The homogenate was extracted at 40°C with 40 KHZ ultrasonic vibration for 0.5h, the extract was vacuum filtered through a 0.45 μm filter membrane, and the filtrate was collected; 100 mL of the extract of bay leaf was put into a round bottom flask, and 0.1mol / Adjust the pH to 6.5 with L sodium hydroxide solution; then add 10 ml 0.2 mol / L ferric chloride solution, and react with 10 KHZ ultrasonic oscillation for 0.5 h; Keep the pH value constant, then rinse with absolute ethanol for more than 3 times, freeze-dry the filter residue after washing for 12 hours, take it out and grind it through a 200-mesh sieve to obtain the nano ferrihydrite.

Embodiment 2

[0034] Dry the fresh laurel leaves at 60°C for 24 hours, crush them and pass them through a 60-mesh sieve. Weigh 20 g of bay leaf powder, put it into 1000 ml of distilled water, soak for 2 h, and stir to form a homogenate. The homogenate was extracted at 40°C with 40 KHZ ultrasonic vibration for 0.5h, the extract was vacuum filtered through a 0.45 μm filter membrane, and the filtrate was collected; 100 mL of the extract of bay leaf was put into a round bottom flask, and 0.1mol / Adjust the pH to 6.5 with L sodium hydroxide solution; then add 20 ml of 0.2 mol / L ferric chloride solution, and react with 10 KHZ ultrasonic oscillation for 0.5 h; Keep the pH value constant, then rinse with absolute ethanol for more than 3 times, freeze-dry the filter residue after washing for 12 hours, take it out and grind it through a 200-mesh sieve to obtain the nano ferrihydrite.

Embodiment 3

[0036] Dry the fresh laurel leaves at 60°C for 24 hours, crush them and pass them through a 60-mesh sieve. Weigh 30 g of bay leaf powder, put it into 1000 ml of distilled water, soak for 2 h, and stir to form a homogenate. The homogenate was extracted at 50°C with 60 KHZ ultrasonic vibration for 0.5h, the extract was vacuum filtered through a 0.45 μm filter membrane, and the filtrate was collected; 100 mL of the extract of bay leaf was put into a round bottom flask, and 0.1mol / Adjust the pH to 7.0 with L sodium hydroxide solution; then add 30 ml 0.2 mol / L ferric chloride solution, and react with 20 KHZ ultrasonic oscillation for 0.5 h; Keep the pH value constant, then rinse with absolute ethanol for more than 3 times, freeze-dry the filter residue after washing for 12 hours, take it out and grind it through a 200-mesh sieve to obtain the nano ferrihydrite.

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Abstract

The invention discloses a preparation method and application of functionalized nanometer ferrihydrite. The preparation method comprises weighing powder of leaves of Excoecaria cochinchinensis Lour, carrying out ultrasonic concussion to obtain extract of leaves of Excoecaria cochinchinensis Lour, adjusting pH of the extract, adding a ferric chloride solution into the extract, carrying out ultrasonic concussion for a reaction, and carrying out suction filtration and washing to obtain nanometer ferrihydrite. The nanometer ferrihydrite has significant adsorption effects on heavy metals and acid and basic dyes. The method utilizes eco-friendly raw materials, realizes a low cost, has no pollution to the environment and has high removal efficiency.

Description

technical field [0001] The invention belongs to the field of ferrihydrite preparation, and in particular relates to a functional nanometer ferrihydrite and a preparation method thereof. Background technique [0002] Environmental heavy metal pollution incidents occur frequently in our country, and the scope of influence is very wide. It has caused a serious threat to the safety of cultivated land and agricultural products, which will directly damage the health of the people and shake social stability. In addition, azo dyes are organic dyes containing azo bonds, which account for 60-70% of the textile industry and are the most widely used dyes. Due to its carcinogenic, teratogenic and mutagenic toxic effects, water pollution caused by azo dyes has always been a serious environmental problem. Therefore, how to remediate heavy metal and dye pollution in the environment has always been a research hotspot. Among many remediation methods, the adsorption method has the advantage...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20C02F101/22C02F101/30
CPCB01J20/223B01J20/28004C02F1/285C02F2101/20C02F2101/22C02F2101/308
Inventor 林加奖苏炳林甘莉陈祖亮
Owner FUJIAN NORMAL UNIV
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