Preparation method of iron-magnesium compound coated bentonite composite powder adsorbent, and application of adsorbent in treatment of dye wastewater

A technology of composite powder and bentonite, which is applied in the direction of adsorption of water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low adsorption performance and achieve improved adsorption performance and strong hydroxyl bridging function, the effect of expanding the specific surface area

Active Publication Date: 2019-01-11
管敏富
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The larger the specific surface area of ​​the adsorbent, the better

Method used

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  • Preparation method of iron-magnesium compound coated bentonite composite powder adsorbent, and application of adsorbent in treatment of dye wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: Dissolve 17.9g of ferrous sulfate and 5.11g of magnesium sulfate in 100mL of deionized water to obtain a salt solution for later use;

[0023] Step 2: fully expand 20g of bentonite with 300mL of deionized water, add 1g of cetyltrimethylammonium bromide, and ultrasonically disperse and mix evenly to obtain a bentonite suspension;

[0024] Step 3: Add the bentonite suspension in Step 2 into a three-necked flask with a stirrer, raise the temperature in the water bath to 45°C, turn on the stirring device at a speed of 600r / min, add the salt solution in Step 1 under stirring conditions, and stir After 20 minutes, raise the temperature to 60°C, add 15mL of 4moL / L sodium hydroxide solution dropwise, react for 4h, then stop stirring, titrate to neutral with 2wt% hydrochloric acid, filter with suction, and dry the solid in an oven at 110°C ;

[0025] Step 4: Calcining the solid matter dried in Step 3 in a muffle furnace at 600° C. for 1 hour to obtain an iron-magnesium ...

Embodiment 2

[0027] Step 1: Dissolve 16g of ferrous sulfate and 6.97g of magnesium sulfate in 100mL of deionized water to obtain a salt solution for later use;

[0028] Step 2: fully expand 10g of bentonite with 300mL of deionized water, add 2g of cetyltrimethylammonium bromide, and ultrasonically disperse and mix evenly to obtain a bentonite suspension;

[0029] Step 3: Add the bentonite suspension in Step 2 into a three-necked flask with a stirrer, raise the temperature in the water bath to 25°C, turn on the stirring device at a speed of 800r / min, add the salt solution in Step 1 under stirring conditions, and stir After 10 minutes, heat up to 80°C, add 15mL 4moL / L sodium hydroxide solution dropwise, react for 4h, then stop stirring, titrate to neutral with 2wt% hydrochloric acid, filter with suction, and dry the solid in an oven at 110°C ;

[0030] Step 4: Calcining the solid matter dried in Step 3 in a muffle furnace at 400° C. for 4 hours to obtain an iron-magnesium composite-coated b...

Embodiment 3

[0032] Step 1: Dissolve 17.2g of ferrous sulfate and 5.71g of magnesium sulfate in 100mL of deionized water to obtain a salt solution for later use;

[0033] Step 2: fully expand 18g of bentonite with 300mL of deionized water, add 1.4g of cetyltrimethylammonium bromide, and ultrasonically disperse and mix evenly to obtain a bentonite suspension;

[0034] Step 3: Add the bentonite suspension in Step 2 into a three-necked flask with a stirrer, raise the temperature in the water bath to 40°C, turn on the stirring device at a speed of 650r / min, add the salt solution in Step 1 under stirring conditions, and stir After 18 minutes, heat up to 65°C, add 15mL of 4moL / L sodium hydroxide solution dropwise, react for 4h, then stop stirring, titrate to neutral with 2wt% hydrochloric acid, filter with suction, and dry the solid in an oven at 110°C ;

[0035] Step 4: Calcining the solid matter dried in Step 3 in a muffle furnace at 550° C. for 2 hours to obtain an iron-magnesium composite-c...

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Abstract

The invention provides a preparation method of an iron-magnesium compound coated bentonite composite powder adsorbent, and an application of the adsorbent in the treatment of dye wastewater, and belongs to the technical fields of chemical industry and environmental protection. The preparation method of the iron-magnesium compound coated bentonite composite powder adsorbent comprises the followingsteps: dissolving ferrous sulfate and magnesium sulfate in deionized water to obtain a salt solution for later use; fully expanding bentonite with deionized water, adding cetyltrimethylammonium bromide, and performing uniform mixing to obtain a bentonite suspension; and adding the bentonite suspension into a three-necked flask, adding the salt solution under a stirring condition, dropwise adding asodium hydroxide solution, carrying out a reaction for 4 h, stopping stirring, titrating the obtained solution with hydrochloric acid until the solution is neutral, performing suction filtration, drying the obtained solid, and then calcining the dried solid in a muffle furnace to obtain the iron-magnesium compound coated bentonite composite powder adsorbent. The iron-magnesium compound coated bentonite composite powder adsorbent prepared in the invention has good adsorbing and decolorizing effects on the dye wastewater.

Description

technical field [0001] The invention relates to the technical fields of chemical industry and environmental protection, in particular to the preparation of an iron-magnesium composite-coated bentonite composite powder adsorbent and its application in treating dye wastewater. Background technique [0002] There are many side reactions in the production process of the dyeing dye industry. The loss rate of dyes in the production process is about 2%, and the loss rate in the dyeing process is 10%. The dye wastewater contains a large amount of dyes, which is highly toxic and difficult to handle. If printing and dyeing wastewater is discharged directly without treatment, it will cause damage to aquatic organisms and pose a huge threat to human health. The treatment methods of printing and dyeing wastewater usually include physical and chemical methods such as adsorption, coagulation and oxidation. Adsorption is a very common treatment method in water treatment. The adsorption me...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/12B01J20/32C02F1/28C02F101/30
CPCB01J20/04B01J20/12B01J20/3242C02F1/281C02F2101/308
Inventor 管敏富
Owner 管敏富
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