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Preparation method of amido modified ferrihydrite material and application thereof

A technology for modifying water and iron ore, which is applied in the field of material technology and pollutant treatment, can solve the problems of limited adsorption capacity of iron water ore, and achieve the effects of fast adsorption rate, enhanced adsorption effect, and easy control

Pending Publication Date: 2022-01-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of pure ferrihydrite is limited, and the surface functionalization method is used to modify the surface of iron oxides to improve the ability of iron oxides to adsorb pollutants.

Method used

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  • Preparation method of amido modified ferrihydrite material and application thereof
  • Preparation method of amido modified ferrihydrite material and application thereof
  • Preparation method of amido modified ferrihydrite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1), the ferric chloride hexahydrate of 5.41g is added into 100mL deionized water to form 0.2mol / L Fe 3+ solution.

[0033] Step 2), use NaOH solution and HCl solution to adjust the pH to 7.5±0.1, continue to stir for 1h, and age for 12h.

[0034] Step 3), centrifuge, separate the precipitate and wash with deionized water until the supernatant is free of Cl - , put the obtained brown-red precipitate in an oven at 60° C. for 12 h, and grind the dried product with an agate mortar.

Embodiment 2

[0036] Step 1), take 0.2g of the sample in Example 1, soak it in 100mL deionized water, and stir.

[0037] In step 2), 4 mL of polyethyleneimine was dissolved in 40 mL of ethanol, and stirred continuously for 30 min to form a uniform solution, which was added to step 1 dropwise.

[0038] Step 3), use NaOH solution and HCl solution to adjust the pH to 7.5±0.1, continue to stir for 1h, and age for 12h.

[0039] Step 4), centrifuge, separate the precipitate and wash with deionized water until the supernatant is free of Cl - , put the obtained brown-red precipitate in an oven at 60° C. for 12 h, and grind the dried product with an agate mortar.

Embodiment 3

[0041] Step 1), the ferric chloride hexahydrate of 5.41g is added into 100mL deionized water to form 0.2mol / L Fe 3+ solution.

[0042] Step 2), take 0.5mL polyethyleneimine and dissolve it in 40mL ethanol, keep stirring for 30min to form a uniform solution, and add it into step 1 dropwise.

[0043] Step 3), use NaOH solution and HCl solution to adjust the pH to 7.5±0.1, continue to stir for 1h, and age for 12h.

[0044]Step 4), centrifuge, separate the precipitate and wash with deionized water until the supernatant is free of Cl - , put the obtained brown-red precipitate in an oven at 60° C. for 12 h, and grind the dried product with an agate mortar.

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Abstract

The invention discloses a preparation method of an amido-modified ferrihydrite material and an application thereof, and ferrihydrite is modified by using amido-rich polyethyleneimine with an iron element widely existing in nature as a raw material to obtain a chromium removal adsorbent with high adsorption capacity. The preparation method is a co-precipitation method and is environment-friendly, energy-saving and simple, the raw materials required by the preparation method are common, easy to obtain and non-toxic, and the obtained adsorbent has high performance on hexavalent chromium in wastewater and good cyclic utilization, and is a novel adsorbent for effectively treating the wastewater containing hexavalent chromium.

Description

technical field [0001] The invention relates to the field of material technology and pollutant treatment, in particular to a preparation method of polyethyleneimine modified ferrihydrite adsorbent and its use as the adsorbent for removing chromium in water bodies. Background technique [0002] Chromium is an essential metal element in industrial production, but it is also one of the 20 chemical substances that pose the greatest hazard to organisms. In industrial production, a large amount of chromium-containing wastewater is produced every year, and adsorption method is a typical method for chromium removal. Among many adsorbents, iron oxides are widely used because of their economy and environmental protection. Iron is rich in content, ranking fourth, and also the second metal element in content. The formation of iron oxides is the product of weathering of various iron-containing rocks and minerals in nature, including iron oxides, hydroxides and iron oxyhydroxides, and i...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/22
CPCB01J20/06B01J20/262C02F1/281C02F1/285C02F2101/22
Inventor 韩梦然黄香
Owner TIANJIN UNIV
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