Montmorillonite-containing composite adsorbing material and preparation method and application thereof

Abstract

The invention provides a montmorillonite-containing composite adsorbing material. The montmorillonite-containing composite adsorbing material comprises montmorillonite and chitosan forming an intercalated structure with the montmorillonite, wherein the chitosan is loaded with a nanometer titanium dioxide-mesoporous carbon precipitate. The invention provides the montmorillonite-containing compositeadsorbing material prepared by a preparation method and application thereof. The montmorillonite-containing composite adsorbing material can be applied to treatment to PPCP pollutants such as chloramphenicol, penicillin, erythromycin, streptomycin, vancomycin, pipemidic acid, ibuprofen, diclofenac sodium in wastewater and is relatively good in treatment effect. The patented technology is funded by a key research project (15A610008) in a higher education institution and a doctoral research startup fund (201610009) in North China University of Water Resources and Hydropower.

Description

technical field

[0001] The invention relates to a water treatment agent and a preparation method thereof, in particular to a montmorillonite composite adsorption material for adsorbing PPCPs pollutants and a preparation method thereof. Background technique

[0002] PPCPs is the abbreviation of Drugs and Personal Protective Products, which are widely used in humans, livestock, and fish. There are more than 3,000 chemical components that make up PCCPs, mainly including two categories: one is drugs, including antibiotics, analgesics, hormones, diuretics, painkillers, steroids, caffeine, etc.; the other is personal protective products, Includes fragrances, hairspray, cosmetics, and more. At present, the different types of PPCPs left in the global environment are mainly antibiotics and pyrolytic analgesics. Because most of the PPCPs have low volatility or are not easy to degrade, most of them are left in the water environment and the detection amount is relatively low. Large, P...

Examples

Embodiment 1

[0025] The present embodiment provides a montmorillonite composite adsorption material, which includes montmorillonite and chitosan which forms an intercalation structure with the montmorillonite, and the chitosan is loaded with nano titanium dioxide-mesoporous carbon precipitates, the The nano-titanium dioxide-carbon precipitate comprises titanium dioxide nanoparticles and a mesoporous carbon layer coated on the surface of the titanium dioxide nanoparticles. Wherein, the diameter of the mesoporous pores in the mesoporous carbon layer is 30-50 nm. The titanium dioxide nanoparticles are titanium dioxide nanospheres. In this embodiment, the content of chitosan is 5% of the mass of montmorillonite, and the content of titanium dioxide nanospheres is 50% of the mass of chitosan.

[0026] The present embodiment also provides a kind of preparation method of above-mentioned montmorillonite composite adsorption material, it comprises the following steps:

[0027] Step 1. Mix 200 part...

Embodiment 2

[0032] This embodiment provides a kind of montmorillonite composite adsorption material, the structure of this composite adsorption material is basically the same as that of the composite adsorption material provided in Example 1, the difference is: the mesoporous pore size in the mesoporous carbon layer is 50-100nm, the content of chitosan is 6% of the mass of montmorillonite, and the content of titanium dioxide nanospheres is 70% of the mass of chitosan.

[0033] The preparation method of the above-mentioned montmorillonite composite adsorption material provided in this embodiment is basically the same as the preparation method provided in Example 1, the main difference is that: in step 1 of this embodiment, an aqueous ethanol solution with a volume concentration of 35% is used, and step 2 After adding acetic acid, the mass concentration of acetic acid is 2%.

Embodiment 3

[0035]This embodiment provides a montmorillonite composite adsorption material, the structure of the composite adsorption material is basically the same as that of the composite adsorption material provided in Example 1, the difference is that the mesoporous pore diameter in the mesoporous carbon layer is 40-70nm, the content of chitosan is 7% of the mass of montmorillonite, and the content of titanium dioxide nanospheres is 80% of the mass of chitosan.

[0036] The preparation method of the above-mentioned montmorillonite composite adsorption material provided in this embodiment is basically the same as the preparation method provided in Example 1, the main difference is that: in step 1 of this embodiment, an aqueous ethanol solution with a volume concentration of 40% is used, and step 2 After adding acetic acid, the mass concentration of acetic acid is 3%.

technical field

[0001] The invention relates to a water treatment agent and a preparation method thereof, in particular to a montmorillonite composite adsorption material for adsorbing PPCPs pollutants and a preparation method thereof. Background technique

[0002] PPCPs is the abbreviation of Drugs and Personal Protective Products, which are widely used in humans, livestock, and fish. There are more than 3,000 chemical components that make up PCCPs, mainly including two categories: one is drugs, including antibiotics, analgesics, hormones, diuretics, painkillers, steroids, caffeine, etc.; the other is personal protective products, Includes fragrances, hairspray, cosmetics, and more. At present, the different types of PPCPs left in the global environment are mainly antibiotics and pyrolytic analgesics. Because most of the PPCPs have low volatility or are not easy to degrade, most of them are left in the water environment and the detection amount is relatively low. Large, P...

Examples

Embodiment 1

[0025] The present embodiment provides a montmorillonite composite adsorption material, which includes montmorillonite and chitosan which forms an intercalation structure with the montmorillonite, and the chitosan is loaded with nano titanium dioxide-mesoporous carbon precipitates, the The nano-titanium dioxide-carbon precipitate comprises titanium dioxide nanoparticles and a mesoporous carbon layer coated on the surface of the titanium dioxide nanoparticles. Wherein, the diameter of the mesoporous pores in the mesoporous carbon layer is 30-50 nm. The titanium dioxide nanoparticles are titanium dioxide nanospheres. In this embodiment, the content of chitosan is 5% of the mass of montmorillonite, and the content of titanium dioxide nanospheres is 50% of the mass of chitosan.

[0026] The present embodiment also provides a kind of preparation method of above-mentioned montmorillonite composite adsorption material, it comprises the following steps:

[0027] Step 1. Mix 200 part...

Embodiment 2

[0032] This embodiment provides a kind of montmorillonite composite adsorption material, the structure of this composite adsorption material is basically the same as that of the composite adsorption material provided in Example 1, the difference is: the mesoporous pore size in the mesoporous carbon layer is 50-100nm, the content of chitosan is 6% of the mass of montmorillonite, and the content of titanium dioxide nanospheres is 70% of the mass of chitosan.

[0033] The preparation method of the above-mentioned montmorillonite composite adsorption material provided in this embodiment is basically the same as the preparation method provided in Example 1, the main difference is that: in step 1 of this embodiment, an aqueous ethanol solution with a volume concentration of 35% is used, and step 2 After adding acetic acid, the mass concentration of acetic acid is 2%.

Embodiment 3

[0035]This embodiment provides a montmorillonite composite adsorption material, the structure of the composite adsorption material is basically the same as that of the composite adsorption material provided in Example 1, the difference is that the mesoporous pore diameter in the mesoporous carbon layer is 40-70nm, the content of chitosan is 7% of the mass of montmorillonite, and the content of titanium dioxide nanospheres is 80% of the mass of chitosan.

[0036] The preparation method of the above-mentioned montmorillonite composite adsorption material provided in this embodiment is basically the same as the preparation method provided in Example 1, the main difference is that: in step 1 of this embodiment, an aqueous ethanol solution with a volume concentration of 40% is used, and step 2 After adding acetic acid, the mass concentration of acetic acid is 3%.

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