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Modified iron ferric oxide nanocomposite and preparation method for removing heavy metal ions and organic matter in industrial wastewater

A technology of ferroferric oxide and heavy metal ions, which is applied in the field of nanometer and water pollution control, and can solve the problems of long preparation process, unrealized, complicated pretreatment process of rice husk, etc.

Active Publication Date: 2021-05-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the pretreatment process of rice husk is complicated, and the preparation process takes a long time
None of the above technologies achieved the goal of significantly improving the dispersibility and stability of Fe3O4 through simple, low-cost modification methods

Method used

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  • Modified iron ferric oxide nanocomposite and preparation method for removing heavy metal ions and organic matter in industrial wastewater
  • Modified iron ferric oxide nanocomposite and preparation method for removing heavy metal ions and organic matter in industrial wastewater
  • Modified iron ferric oxide nanocomposite and preparation method for removing heavy metal ions and organic matter in industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve 0.3g montmorillonite, 0.25g humic acid, 3.45g ferric chloride hexahydrate and 2.5g ferric dichloride heptahydrate in 78.1ml mixed solvent with a volume ratio of water and ethanol of 0.9, under the condition of 50W power Ultrasound for 2.5 hours. Heat the ultrasonically mixed solution to 80°C, add 5ml of ammonia water with a mass fraction of 25%, transfer the obtained turbid solution to the polytetrafluoroethylene liner in the stainless steel hydrothermal reaction kettle, tighten it, and let it stand at 110°C for 3 hours , cooled naturally to room temperature, filtered under normal pressure, washed with distilled water, and dried at 60° C. for 10 hours to obtain ferric oxide nanocomposites.

[0030] At 25°C, prepare 100 mL of a mixed solution of 40.0 mg / L Cr(VI) and 100.0 mg / L aniline, place it in a 250 mL beaker, adjust the pH to 3.0, adjust the mechanical stirring rate to 400 rpm, and weigh 0.10 g of this The ferric oxide complex product prepared by the paten...

Embodiment 2

[0034]Dissolve 0.4g montmorillonite, 0.35g humic acid, 3.6g ferric chloride hexahydrate and 2.5g ferric chloride heptahydrate in 75.7ml mixed solvent with a volume ratio of water and ethanol of 1.1, under 70W power condition Ultrasound for 3 hours. Heat the ultrasonically mixed solution to 90°C, add 5ml of ammonia water with a mass fraction of 28%, transfer the obtained turbid solution to the polytetrafluoroethylene liner in the stainless steel hydrothermal reaction kettle, tighten it, and let it stand at 130°C for 2 hours , naturally cooled to room temperature, filtered under normal pressure, washed with distilled water, and dried at 70°C for 8 hours.

[0035] At 25°C, prepare 100 mL of a mixed solution of 100.0 mg / L Cr(VI) and 200.0 mg / L aniline, place it in a 250 mL beaker, adjust the pH to 3.0, adjust the mechanical stirring rate to 400 rpm, and weigh 0.10 g of this The ferric oxide complex product prepared by the patented method is quickly added to the solution and the t...

Embodiment 3

[0039] Dissolve 0.34g montmorillonite, 0.28g humic acid, 3.2g ferric chloride hexahydrate and 2.5g ferric dichloride heptahydrate in 76.3ml mixed solvent with a volume ratio of water and ethanol of 0.95, under the condition of 60W power Ultrasound for 2.5 hours. Heat the ultrasonically mixed solution to 85°C, add 5ml of ammonia water with a mass fraction of 26%, transfer the obtained turbid solution to the polytetrafluoroethylene liner in the stainless steel hydrothermal reaction kettle, tighten it, and let it stand at 125°C for 2.5 hours , naturally cooled to room temperature, filtered under normal pressure, washed with distilled water, and dried at 65°C for 9.5 hours.

[0040] At 25°C, prepare 100 mL of a mixed solution of 80.0 mg / L Cr(VI) and 120.0 mg / L aniline, place it in a 250 mL beaker, adjust the pH to 3.0, adjust the mechanical stirring speed to 400 rpm, and weigh 0.10 g of this The ferric oxide complex product prepared by the patented method is quickly added to the ...

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Abstract

The invention relates to a modified iron ferric oxide nanocomposite for removing heavy metal ions and organic matter in industrial waste water and a preparation method. The composition is montmorillonite, humic acid and ferric oxide, and its mass fraction ratio range is (0.10‑0.14): (0.09‑0.12): 1; the structure is the dispersion of ferric oxide nanoparticles coated with humic acid on the montmorillonite layer. Mix montmorillonite, humic acid and iron salt in a mixed solvent of water and ethanol, use ultrasound to achieve uniform mixing of raw materials and obtain a single layer of montmorillonite, add ammonia water under heating conditions, and use one-step hydrothermal method to obtain Montmorillonite / humic acid / ferric oxide composite nanomaterials. The ferric iron tetroxide compound obtained by the method can quickly and efficiently remove industrial wastewater containing heavy metal ions and organic matter with different sources and compositions, has good social and economic benefits, and has good application prospects in actual industrial wastewater treatment applications.

Description

technical field [0001] The invention relates to a modified iron ferric oxide nanocomposite for removing heavy metal ions and organic matter in industrial wastewater and a preparation method thereof, belonging to the technical field of nanometer and water pollution control. Background technique [0002] With the development of modern industrial technology, the volume of industrial wastewater has increased rapidly, which has brought great challenges to the current wastewater treatment and resource recovery technologies. Industrial wastewater generally contains a variety of substances, including various organic substances, inorganic salts, heavy metal elements and radioactive substances. The chemical composition of wastewater from different sources is different, and the environmental pollution is also different. In recent years, environmental protection issues have attracted more and more attention, and relevant regulations have become stricter. From the perspective of enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22C02F101/38
CPCB01J20/0229B01J20/10B01J20/24C02F1/285C02F2101/22C02F2101/38
Inventor 郝红勋卢海娇黄欣徐昭侯宝红尹秋响李飞鲍颖谢闯王召
Owner TIANJIN UNIV