Application of bimetal composite oxide in adsorbing acid violet 90 in dye wastewater
A technology for composite oxide and dye wastewater, applied in the field of acid violet, can solve the problem of low adsorption capacity, and achieve the effect of large adsorption capacity, easy recycling and high removal rate
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Embodiment 1～5
[0038] Prepare 5 parts of 100ml Acid Violet 90 solution, the concentrations are: 100mg·L -1 , 200mg·L -1 , 300mg·L -1 , 400mg·L -1 , 500mg·L -1 , weighed five parts of magnesium-aluminum binary hydrotalcite roasting product, 100 mg each, and added them to the acid violet 90 solution to be treated respectively. The temperature was controlled at 25° C., pH=9.7, and the stirring time was 200 min. After stirring, the solution was centrifuged for 10min, and the concentration of the solution after getting the supernatant was measured to obtain the adsorption capacity of the material to Acid Violet 90 as follows: figure 1 .
[0039]Conclusion: Add 100mg of magnesium aluminum hydrotalcite roasted material to 100ml of acid violet 90 wastewater solution with different concentrations, pH = 9.7, and the temperature is 25°C, the concentration is 500mg L as shown in the figure -1 The maximum adsorption capacity is 498mgg -1 .
Embodiment 6～10
[0041] Prepare 5 servings of 100ml 500mg·L -1 Acid Violet 90 solution, weigh five parts of the magnesium-aluminum binary hydrotalcite roasting product, the mass is: 25mg, 50mg, 75mg, 100mg, 125mg, respectively add to the Acid Violet 90 solution to be treated, control the temperature at 25 ° C, pH =9.7, the stirring time was 200min. After stirring, take the solution and centrifuge for 10 minutes at intervals during the adsorption process, then absorb the supernatant and measure the concentration of the solution after the adsorption, and obtain the adsorption capacity of the material to acid violet 90 as follows: figure 2 , the removal rate as image 3 .
[0042] Conclusion: In 100ml, 500mg·L -1 A certain amount of roasted magnesium aluminum hydrotalcite was added to the wastewater solution of Acid Violet 90, pH = 9.7, and the temperature was 25°C. From the figure, it can be seen that the adsorption effect is the best when the input amount of the roasted product is 100 mg, s...
Embodiment 11～15
[0044] Prepare 5 servings of 100ml 500mg·L -1 Acid Violet 90 solution, weigh five parts of 100mg magnesium aluminum binary hydrotalcite roasting product, add them respectively to the Acid Violet 90 solution to be treated, control the temperature at 25°C, stir for 140min, use 0.1mol / L NaOH solution Or 0.1mol / L HCl solution to adjust the pH value to 4, 6, 8, 9.7, 12 respectively. After stirring, take the solution and centrifuge 10min at intervals during the adsorption process, measure the concentration of the solution after the supernatant is taken, and obtain the removal rate of the material to acid violet 90 as follows: Figure 4 .
[0045] Conclusion: In 100ml, the concentration is 500mg·L -1 In the waste water solution of Acid Violet 90, add 100 mg magnesium aluminum hydrotalcite roasting, the temperature is 25 ℃, under various pH conditions, it can be seen from the figure that the removal rate is the largest when the pH is 4 and 9.7, because the initial pH of the Acid Vio...
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