Study on the Best Working Condition of Silver Powder Wastewater Treatment
Leveraging the mechanism of the Fenton reaction with iron and carbon,the response surface methodology was employed to investigate the optimal conditions for the treatment of wastewater following the bio-chemical process of ultrafine silver powder paste.Initially,through three single-factor experiments,it was discovered that the iron-to-carbon surface area ratio,aeration duration,and hydrogen peroxide concentration all have a certain impact on the COD removal efficiency of the wastewater after the bio-chemical process of ultrafine silver powder paste,but the relationship is not purely linear.Based on this,the current study used the response surface methodology to couple and determine the optimal conditions:iron-to-carbon surface area ratio(A)=4.89 m2/g,aeration duration(B)=267.52 min,hydrogen peroxide concentration(C)=30.56%,with a predicted COD removal rate of 97.319 6%under the optimal conditions.Finally,the predicted COD removal rate of the bio-chemical wastewater under the optimal conditions determined by the response surface methodology was verified.The COD removal rate achieved by the Fenton reaction under the optimal conditions for the treatment of wastewater following the bio-chemical process of ultrafine silver powder paste was 96.73%,with an error of only 0.610%compared to the average purification efficiency predicted by the response surface methodology(97.319 6%).This indicates that the prediction of the COD removal rate for the wastewater following the bio-chemical process of ultrafine silver powder paste under the optimal conditions by the response surface methodology is reliable,providing theoretical support for the coupling of optimal conditions for other catalysts in subsequent studies.
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