Study on the effect of kaolin-enhanced magnesium hydroxide coagulation on the removal of reactive orange dye

As a common water-soluble dye, the treatment of reactive orange dye has always been a difficult problem in the field of environmental engineering. Kaolin, as a natural mineral material, has been studied for its unique physical and chemical properties to enhance the coagulation effect of magnesium hydroxide to improve the removal efficiency of reactive orange dye.

Mechanism of action of kaolin

Adsorption capacity: The large specific surface area and surface active sites of kaolin provide strong dye adsorption capacity.

Coagulant effect: As a coagulant, kaolin helps magnesium hydroxide form a more stable floc structure.

Effect of dosage

Optimal ratio: Determine the optimal dosage ratio of magnesium hydroxide and kaolin to achieve the highest dye removal rate.

Effect of overdosage: Too much coagulant may cause the flocs to be too large and loose, reducing the removal efficiency.

Effect of coagulation conditions

Agitation conditions: Agitation time and speed have a significant effect on floc formation and dye removal effect.

pH value: A specific pH range is critical to improving dye removal efficiency.

Temperature: Generally, higher temperatures help improve coagulation effect.

Experimental results and analysis

Dye removal rate: The specific effect of kaolin was evaluated by comparing the dye removal rates under different conditions.

Turbidity change: Kaolin increases the turbidity of wastewater, which may have a positive effect on the coagulation effect.

Economic and practical: The feasibility of kaolin as a coagulant is evaluated from the perspective of cost-effectiveness.

Specific case

Synergy: The synergy between kaolin and magnesium hydroxide effectively improves the dye removal rate.

Condition optimization: The removal effect is further optimized by adjusting the coagulation conditions, such as pH value and stirring speed.

Turbidity effect: The addition of kaolin increases the turbidity of wastewater and helps to improve the coagulation effect.

Kaolin, as a coagulant, significantly improves the removal efficiency of reactive orange dye when used in combination with magnesium hydroxide. By optimizing the dosage ratio of coagulants and controlling the coagulation conditions, not only can the dye removal rate be improved, but also the treatment cost can be reduced, and the economy and practicality of the coagulation process can be enhanced.