Application of photocatalyst of TiO2 (titanium dioxide) loaded on glass fiber fabric to treating microcystin

Abstract

The invention discloses application of photocatalyst of TiO2 (titanium dioxide) loaded on a glass fiber fabric to treating microcystin. The glass fiber fabric serves as a catalyst carrier with a load of 0.8-1.2g / 200cm2, and the TiO2 loaded on the glass fiber fabric is of a P25 type. After the TiO2 is treated, hydroxyl radicals are obviously increased during photocatalysis, so that oxidative degradation of the microcystin by means of photocatalysis is improved. Besides, the TiO2 has high photocatalytic activity and is higher in reuse rate.

Description

technical field

[0001] The invention relates to a photocatalytic oxidation method of microcystin, using glass fiber cloth (FGC) as a fixed TiO 2 The carrier for improving its photocatalytic activity belongs to the fields of water treatment technology and environmental pollution control technology. Background technique

[0002] In recent years, with the aggravation of eutrophication in lakes, cyanobacteria "blooms" have occurred frequently, and cyanobacteria will secrete microcystins in the process of metabolism or after the rupture of algae, polluting water sources, and directly threatening human health. Conventional water treatment processes are difficult to completely remove microcystins from water bodies, and even cause algal cell rupture and release algal toxins into water bodies, so further advanced treatment is required to remove them.

[0003] The conventional water treatment method currently adopted to remove microcystins has the following disadvantages:

[0004] a...

Examples

Embodiment 1

[0023] This kind of photocatalyst used in the treatment of microcystins is realized according to the following steps:

[0024] 1) TiO 2 Sol preparation:

[0025] The TiO 2 Preparation of sol: Dissolve 85mL tetrabutyl titanate in 400mL absolute ethanol, add 15mL hydrolysis inhibitor triethanolamine, stir magnetically for 1.5h to make A solution; mix 9mL deionized water and 50mL absolute ethanol, add nitric acid Adjust the pH to 3.0 to make B solution. Slowly add solution B to solution A with magnetic stirring, and continue to stir for 1 hour after the addition is completed to obtain a yellowish transparent sol; the sol is sealed and aged in a dark place for 24 hours for later use; the ratio of each raw material is: n (Cl 2 h 36 o 4 Ti): n (C 4 h 11 NO 2 ) : n (C 2 h 5 OH): n (H 2 (0)=1:0.86:26.6:2.

[0026] 2) Glass fiber cloth loaded TiO 2 :

[0027] The glass fiber cloth loaded with TiO 2 Follow the steps below: a. Soak a glass fiber cloth with a length o...

Embodiment 2

[0029] This kind of photocatalyst used in the treatment of microcystins is realized according to the following steps:

[0030] 1) TiO 2 Sol preparation:

[0031] The TiO 2 Preparation of sol: Dissolve 85mL tetrabutyl titanate in 400mL absolute ethanol, add 15mL hydrolysis inhibitor triethanolamine, stir magnetically for 1.5h to make A solution; mix 9mL deionized water and 50mL absolute ethanol, add nitric acid Adjust the pH to 3.0 to make B solution. Slowly add solution B to solution A with magnetic stirring, and continue to stir for 1 hour after the addition is completed to obtain a yellowish transparent sol; the sol is sealed and aged in a dark place for 24 hours for later use; the ratio of each raw material is: n (Cl 2 h 36 o 4 Ti): n (C 4 h 11 NO 2 ) : n (C 2 h 5 OH): n (H 2 (0)=1:0.86:26.6:2.

[0032] 2) Glass fiber cloth loaded TiO 2 :

[0033] The glass fiber cloth loaded with TiO 2 Follow the steps below: a. Soak the glass fiber cloth with a length...

Embodiment 3

[0057] This kind of photocatalyst used in the treatment of microcystins is realized according to the following steps:

[0058] 1) TiO 2 Sol preparation:

[0059] The TiO 2 Preparation of sol: Dissolve 85mL tetrabutyl titanate in 400mL absolute ethanol, add 15mL hydrolysis inhibitor triethanolamine, stir magnetically for 1.5h to make A solution; mix 9mL deionized water and 50mL absolute ethanol, add nitric acid Adjust the pH to 3.0 to make B solution. Slowly add solution B to solution A with magnetic stirring, and continue to stir for 1 hour after the addition is completed to obtain a yellowish transparent sol; the sol is sealed and aged in a dark place for 24 hours for later use; the ratio of each raw material is: n (Cl 2 h 36 o 4 Ti): n (C 4 h 11 NO 2 ) : n (C 2 h 5 OH): n (H 2 (0)=1:0.86:26.6:2.

[0060] 2) Glass fiber cloth loaded TiO 2 :

[0061] The glass fiber cloth loaded with TiO 2 Follow the steps below: a. Soak the glass fiber cloth with a length...

technical field

[0001] The invention relates to a photocatalytic oxidation method of microcystin, using glass fiber cloth (FGC) as a fixed TiO 2 The carrier for improving its photocatalytic activity belongs to the fields of water treatment technology and environmental pollution control technology. Background technique

[0002] In recent years, with the aggravation of eutrophication in lakes, cyanobacteria "blooms" have occurred frequently, and cyanobacteria will secrete microcystins in the process of metabolism or after the rupture of algae, polluting water sources, and directly threatening human health. Conventional water treatment processes are difficult to completely remove microcystins from water bodies, and even cause algal cell rupture and release algal toxins into water bodies, so further advanced treatment is required to remove them.

[0003] The conventional water treatment method currently adopted to remove microcystins has the following disadvantages:

[0004] a...

Examples

Embodiment 1

[0023] This kind of photocatalyst used in the treatment of microcystins is realized according to the following steps:

[0024] 1) TiO 2 Sol preparation:

[0025] The TiO 2 Preparation of sol: Dissolve 85mL tetrabutyl titanate in 400mL absolute ethanol, add 15mL hydrolysis inhibitor triethanolamine, stir magnetically for 1.5h to make A solution; mix 9mL deionized water and 50mL absolute ethanol, add nitric acid Adjust the pH to 3.0 to make B solution. Slowly add solution B to solution A with magnetic stirring, and continue to stir for 1 hour after the addition is completed to obtain a yellowish transparent sol; the sol is sealed and aged in a dark place for 24 hours for later use; the ratio of each raw material is: n (Cl 2 h 36 o 4 Ti): n (C 4 h 11 NO 2 ) : n (C 2 h 5 OH): n (H 2 (0)=1:0.86:26.6:2.

[0026] 2) Glass fiber cloth loaded TiO 2 :

[0027] The glass fiber cloth loaded with TiO 2 Follow the steps below: a. Soak a glass fiber cloth with a length o...

Embodiment 2

[0029] This kind of photocatalyst used in the treatment of microcystins is realized according to the following steps:

[0030] 1) TiO 2 Sol preparation:

[0031] The TiO 2 Preparation of sol: Dissolve 85mL tetrabutyl titanate in 400mL absolute ethanol, add 15mL hydrolysis inhibitor triethanolamine, stir magnetically for 1.5h to make A solution; mix 9mL deionized water and 50mL absolute ethanol, add nitric acid Adjust the pH to 3.0 to make B solution. Slowly add solution B to solution A with magnetic stirring, and continue to stir for 1 hour after the addition is completed to obtain a yellowish transparent sol; the sol is sealed and aged in a dark place for 24 hours for later use; the ratio of each raw material is: n (Cl 2 h 36 o 4 Ti): n (C 4 h 11 NO 2 ) : n (C 2 h 5 OH): n (H 2 (0)=1:0.86:26.6:2.

[0032] 2) Glass fiber cloth loaded TiO 2 :

[0033] The glass fiber cloth loaded with TiO 2 Follow the steps below: a. Soak the glass fiber cloth with a length...

Embodiment 3

[0057] This kind of photocatalyst used in the treatment of microcystins is realized according to the following steps:

[0058] 1) TiO 2 Sol preparation:

[0059] The TiO 2 Preparation of sol: Dissolve 85mL tetrabutyl titanate in 400mL absolute ethanol, add 15mL hydrolysis inhibitor triethanolamine, stir magnetically for 1.5h to make A solution; mix 9mL deionized water and 50mL absolute ethanol, add nitric acid Adjust the pH to 3.0 to make B solution. Slowly add solution B to solution A with magnetic stirring, and continue to stir for 1 hour after the addition is completed to obtain a yellowish transparent sol; the sol is sealed and aged in a dark place for 24 hours for later use; the ratio of each raw material is: n (Cl 2 h 36 o 4 Ti): n (C 4 h 11 NO 2 ) : n (C 2 h 5 OH): n (H 2 (0)=1:0.86:26.6:2.

[0060] 2) Glass fiber cloth loaded TiO 2 :

[0061] The glass fiber cloth loaded with TiO 2 Follow the steps below: a. Soak the glass fiber cloth with a length...

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