Biomagnetic nano composite material as well as preparation method and application thereof

Abstract

The invention provides a biological magnetic nano composite material as well as a preparation method and application thereof, the preparation method comprises the following steps: S1, dispersing ferroferric oxide particles in an aqueous solution to obtain an aqueous solution of ferroferric oxide, and then adding a ferrite solution into the aqueous solution of ferroferric oxide to obtain a reduced mixed solution; a hydroboron solution is dropwise added into the reduction mixed solution for a reduction reaction, the nano zero-valent iron-ferroferric oxide double-nano material is obtained, and the whole process is completed under nitrogen protection; and S2, embedding the nano zero-valent iron-ferroferric oxide double-nano material obtained in the step S1 by using polyethyleneimine to obtain the biological magnetic nano composite material. The biomagnetic nano composite material can be used for repairing the acidic arsenic-containing wastewater, and the acidic arsenic-containing wastewater can be quickly and efficiently repaired.

Description

technical field

[0001] The invention relates to the purification of arsenic-containing wastewater, in particular to a biomagnetic nanocomposite material, its preparation method and application. Background technique

[0002] Arsenic (As) pollution is a worldwide environmental problem that has attracted widespread attention due to its adverse effects on global human health. According to reports, due to the rapid development of industry, more than 40,000 tons of arsenic-containing high-concentration wastewater are discharged from industrial sources every year. The main industrial process causing arsenic pollution is non-ferrous metal smelting process, especially smelting operation and pickling recovery of flue gas, which produces a large amount of highly acidic wastewater with high concentration of arsenic. Arsenic exists mainly in the form of two inorganic compounds in the aquatic environment, namely, arsenite (As(III)) and arsenate (As(V)). Importantly, As(III) is approxima...

Examples

preparation example Construction

[0049] The invention provides a preparation method of a biomagnetic nanocomposite material, comprising the steps of:

[0050] S1, preparation of nano zero-valent iron-ferric oxide double nanomaterials;

[0051] The step S1 specifically includes:

[0052] S11, dispersing iron ferric oxide particles in an aqueous solution to obtain an aqueous solution of ferric oxide, and then adding a ferrous salt solution to the aqueous solution of ferric oxide to obtain a reduction mixture;

[0053] S12, adding a borohydride solution dropwise to the reduction mixture to perform a reduction reaction to obtain the nano-zero-valent iron-ferric oxide double nanomaterial;

[0054] Wherein, the entire process of the step S11 and the step S12 is carried out under nitrogen protection.

[0055] S2, using polyethyleneimine (PEI) to entrap Fe 3 o 4 -nZVI double nanoparticles to obtain the biomagnetic nanocomposite material.

[0056] In the above embodiment, the nano-zero-valent iron is evenly loade...

Embodiment 1

[0072] This example explores Fe 0 and Fe 3 o 4 The optimal mass ratio of , its specific implementation steps are as follows:

[0073] (1) Preparation of different proportions of nanometer zero-valent iron-ferric oxide double nanomaterials: Weigh 0.04g, 0.06g, 0.2g, 0.6g Fe 3 o 4 Dissolve in 100mL deionized water, stir for 1h, transfer the above solutions to 500mL three-necked flasks and feed nitrogen, then add 1g FeSO 4 ·7H 2 O, stirred for 0.5h to ensure FeSO 4 ·7H 2 O completely dissolved, Fe 0 :Fe 3 o 4The mass ratios are 1:0.3, 1:1, 1:3 and 1:5 respectively, stir to dissolve it fully; add 100mL 0.25mol / L NaBH dropwise to the resulting mixture 4 solution for reduction reaction; after 1 hour of reaction, stop nitrogen flow, filter the resulting product, wash with deoxygenated water for 3 to 5 times, and finally freeze-dry for 24 hours to obtain different mass ratios of Fe 3 o 4 -nZVI double nanoparticles (Fe 3 o 4 -nZVI).

[0074] (2) Weigh 0.01 g of nano-size...

Embodiment 2

[0079] This embodiment adopts the best Fe in embodiment 1 0 : Fe 3 o 4 The mass ratio of polyethyleneimine (PEI) embeds nano zero-valent iron-ferric oxide double nanomaterials to obtain biomagnetic nanocomposites. The specific preparation steps are as follows:

[0080] (1) Preparation of nano-zero-valent iron-ferric oxide double nanomaterials: first weigh 0.12g Fe 3 o 4 Dissolve in 200mL deionized water, stir for 1h, transfer the above solution to a 500mL three-necked flask and pass nitrogen gas, then add 2gFeSO 4 ·7H 2 O, stirred for 0.5h to ensure FeSO 4 ·7H 2 O completely dissolved, Fe 0 :Fe 3 o 4 The mass ratio is 1:0.3, stir to make it fully dissolved; dropwise add 200mL 0.25mol / L NaBH to the resulting mixture 4 solution for reduction reaction; after reacting for 1 hour, stop nitrogen flow, filter the resulting product, wash with deoxygenated water for 3 to 5 times, and finally freeze-dry for 24 hours to obtain Fe 3 o 4 -nZVI double nanoparticles (Fe 3 o 4 -...

technical field

[0001] The invention relates to the purification of arsenic-containing wastewater, in particular to a biomagnetic nanocomposite material, its preparation method and application. Background technique

[0002] Arsenic (As) pollution is a worldwide environmental problem that has attracted widespread attention due to its adverse effects on global human health. According to reports, due to the rapid development of industry, more than 40,000 tons of arsenic-containing high-concentration wastewater are discharged from industrial sources every year. The main industrial process causing arsenic pollution is non-ferrous metal smelting process, especially smelting operation and pickling recovery of flue gas, which produces a large amount of highly acidic wastewater with high concentration of arsenic. Arsenic exists mainly in the form of two inorganic compounds in the aquatic environment, namely, arsenite (As(III)) and arsenate (As(V)). Importantly, As(III) is approxima...

Examples

preparation example Construction

[0049] The invention provides a preparation method of a biomagnetic nanocomposite material, comprising the steps of:

[0050] S1, preparation of nano zero-valent iron-ferric oxide double nanomaterials;

[0051] The step S1 specifically includes:

[0052] S11, dispersing iron ferric oxide particles in an aqueous solution to obtain an aqueous solution of ferric oxide, and then adding a ferrous salt solution to the aqueous solution of ferric oxide to obtain a reduction mixture;

[0053] S12, adding a borohydride solution dropwise to the reduction mixture to perform a reduction reaction to obtain the nano-zero-valent iron-ferric oxide double nanomaterial;

[0054] Wherein, the entire process of the step S11 and the step S12 is carried out under nitrogen protection.

[0055] S2, using polyethyleneimine (PEI) to entrap Fe 3 o 4 -nZVI double nanoparticles to obtain the biomagnetic nanocomposite material.

[0056] In the above embodiment, the nano-zero-valent iron is evenly loade...

Embodiment 1

[0072] This example explores Fe 0 and Fe 3 o 4 The optimal mass ratio of , its specific implementation steps are as follows:

[0073] (1) Preparation of different proportions of nanometer zero-valent iron-ferric oxide double nanomaterials: Weigh 0.04g, 0.06g, 0.2g, 0.6g Fe 3 o 4 Dissolve in 100mL deionized water, stir for 1h, transfer the above solutions to 500mL three-necked flasks and feed nitrogen, then add 1g FeSO 4 ·7H 2 O, stirred for 0.5h to ensure FeSO 4 ·7H 2 O completely dissolved, Fe 0 :Fe 3 o 4The mass ratios are 1:0.3, 1:1, 1:3 and 1:5 respectively, stir to dissolve it fully; add 100mL 0.25mol / L NaBH dropwise to the resulting mixture 4 solution for reduction reaction; after 1 hour of reaction, stop nitrogen flow, filter the resulting product, wash with deoxygenated water for 3 to 5 times, and finally freeze-dry for 24 hours to obtain different mass ratios of Fe 3 o 4 -nZVI double nanoparticles (Fe 3 o 4 -nZVI).

[0074] (2) Weigh 0.01 g of nano-size...

Embodiment 2

[0079] This embodiment adopts the best Fe in embodiment 1 0 : Fe 3 o 4 The mass ratio of polyethyleneimine (PEI) embeds nano zero-valent iron-ferric oxide double nanomaterials to obtain biomagnetic nanocomposites. The specific preparation steps are as follows:

[0080] (1) Preparation of nano-zero-valent iron-ferric oxide double nanomaterials: first weigh 0.12g Fe 3 o 4 Dissolve in 200mL deionized water, stir for 1h, transfer the above solution to a 500mL three-necked flask and pass nitrogen gas, then add 2gFeSO 4 ·7H 2 O, stirred for 0.5h to ensure FeSO 4 ·7H 2 O completely dissolved, Fe 0 :Fe 3 o 4 The mass ratio is 1:0.3, stir to make it fully dissolved; dropwise add 200mL 0.25mol / L NaBH to the resulting mixture 4 solution for reduction reaction; after reacting for 1 hour, stop nitrogen flow, filter the resulting product, wash with deoxygenated water for 3 to 5 times, and finally freeze-dry for 24 hours to obtain Fe 3 o 4 -nZVI double nanoparticles (Fe 3 o 4 -...

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