Preparation method for modified bentonite for decoloring waste water of reactive brilliant red dye

Abstract

The invention relates to a preparation method for modified bentonite, belongs to the field of treatment methods for the waste water of dye, and particularly provides a decoloring treatment method. The preparation method for the modified bentonite for decoloring the waste water of the reactive brilliant red dye comprises the following steps: taking dried, crushed and screened bentonite, putting the dried, crushed and screened bentonite into a container with a plug, successively adding inorganic modifiers and organic modifiers, stirring the mixture of the bentonite, the inorganic modifiers and the organic modifiers for 2 hours at the constant temperature of 60 DEG C, filtering products, repeatedly cleaning the filtered products with distilled water, sucking and filtering the cleaned products, baking the filtered products, keeping the baked products at the constant temperature of 110 DEG C for one hour, and grinding and screening the dried and activated products to obtain the modified bentonite. The preparation method disclosed by the invention has the characteristics of simple technology, strong maneuverability, low cost and the like, and the preparation method is suitable for industrialized production. Through determination, the decoloring rate of the prepared modified bentonite for the waste water of the reactive brilliant red dye is 91.8-93.2% which is slightly higher than the decoloring rate 85-90% of activated carbon, but the use cost of the modified bentonite is below one third of that of the activated carbon.

Description

technical field

[0001] The invention relates to a preparation method of modified bentonite, which belongs to the field of dye wastewater treatment, especially the decolorization treatment method. Background technique

[0002] As people pay more and more attention to environmental protection issues, the decolorization of printing and dyeing wastewater and the removal of organic pollutants are receiving more and more attention. It is difficult to carry out conventional treatment. At present, most printing and dyeing factories use activated carbon adsorption, but due to the high price of activated carbon, the application of adsorption and decolorization of printing and dyeing wastewater is limited. The natural mineral montmorillonite is not only rich in mineral reserves, but also cheap (even if the montmorillonite is only 200 yuan per ton after grinding through 200 mesh), it also has good adsorption properties and has attracted attention both at home and abroad.

[0003] Bento...

Examples

Embodiment 1

[0014] Calculated by adding 10 grams of aluminum sulfate and 1 gram of cetyltrimethylammonium bromide to every 100 grams of bentonite, weigh 1000 grams of bentonite, 100 grams of aluminum sulfate, and 10 grams of cetyltrimethylammonium bromide. After drying, crushing and sieving the bentonite, put it in a container with a stopper, add the inorganic modifier aluminum sulfate and the organic modifier cetyltrimethylammonium bromide in sequence, stir at 60°C for 2 hours, and filter the product. Wash with distilled water several times until no sulfate ions exist (no white turbidity is detected by barium chloride solution), then filter with suction and dry, keep the temperature at 110°C for 1 hour, grind and sieve the dried and activated product to obtain the improved Sexual bentonite.

Embodiment 2

[0015] Embodiment two: the adsorption experiment of reactive brilliant red dye wastewater

[0016] Accurately weigh 0.100g of modified bentonite in a conical flask with a stopper, add 100ml of reactive brilliant red X-3B dye with a concentration of 20mg / L, seal it and vibrate at a constant temperature for 1h, centrifuge at a high speed for 15min, and take the supernatant to measure The content of residual dye was used to calculate the removal rate of reactive brilliant red X-3B by different modified bentonites. As shown in Table 1:

[0017] Table-1 Removal rate of reactive brilliant red X-3B

[0018] .

technical field

[0001] The invention relates to a preparation method of modified bentonite, which belongs to the field of dye wastewater treatment, especially the decolorization treatment method. Background technique

[0002] As people pay more and more attention to environmental protection issues, the decolorization of printing and dyeing wastewater and the removal of organic pollutants are receiving more and more attention. It is difficult to carry out conventional treatment. At present, most printing and dyeing factories use activated carbon adsorption, but due to the high price of activated carbon, the application of adsorption and decolorization of printing and dyeing wastewater is limited. The natural mineral montmorillonite is not only rich in mineral reserves, but also cheap (even if the montmorillonite is only 200 yuan per ton after grinding through 200 mesh), it also has good adsorption properties and has attracted attention both at home and abroad.

[0003] Bento...

Examples

Embodiment 1

[0014] Calculated by adding 10 grams of aluminum sulfate and 1 gram of cetyltrimethylammonium bromide to every 100 grams of bentonite, weigh 1000 grams of bentonite, 100 grams of aluminum sulfate, and 10 grams of cetyltrimethylammonium bromide. After drying, crushing and sieving the bentonite, put it in a container with a stopper, add the inorganic modifier aluminum sulfate and the organic modifier cetyltrimethylammonium bromide in sequence, stir at 60°C for 2 hours, and filter the product. Wash with distilled water several times until no sulfate ions exist (no white turbidity is detected by barium chloride solution), then filter with suction and dry, keep the temperature at 110°C for 1 hour, grind and sieve the dried and activated product to obtain the improved Sexual bentonite.

Embodiment 2

[0015] Embodiment two: the adsorption experiment of reactive brilliant red dye wastewater

[0016] Accurately weigh 0.100g of modified bentonite in a conical flask with a stopper, add 100ml of reactive brilliant red X-3B dye with a concentration of 20mg / L, seal it and vibrate at a constant temperature for 1h, centrifuge at a high speed for 15min, and take the supernatant to measure The content of residual dye was used to calculate the removal rate of reactive brilliant red X-3B by different modified bentonites. As shown in Table 1:

[0017] Table-1 Removal rate of reactive brilliant red X-3B

[0018] .