Optimization of photocatalytic treatment parameters by response surface method in dye removal with TiO2-ZrO2 catalyst

Year 2023, Volume: 29 Issue: 7, 752 - 759, 30.12.2023

Sefa Furkan Selçuk , Berk Köker , Meltem Sarıoğlu Cebeci

Abstract

For the optimization of chemical processes, traditional methods by accepting one parameter as variable and keeping other parameters constant are insufficient. Methods that allow the interaction of parameters by modeling the process, such as the response surface method, provide both financial and temporal advantages. In this study, response surface method and central composite design were used to model and optimize the removal parameters of Maxilon Blue GRL dye by photocatalytic method. The catalyst concentration, the amount of ZrO2 used in the production of the catalyst and the reaction time were selected as removal parameters. As a response parameter, the color removal efficiency was investigated. In the single factor analysis, optimum conditions were determined as 0.775g/L catalyst, 0.4g ZrO2 amount and 45min reaction time. With the analysis of 3D surface and contour graphics, it was evaluated that the interaction between catalyst concentration and ZrO2 amount parameters was low, while the interaction of the reaction time parameter with the ZrO2 amount and catalyst concentration parameters was found to be high. In line with the results of the ANOVA analysis and validation experiment, it has been proven that the predicted values of the model can represent the analysis values. In the optimum option chosen for the validation experiment, the estimated value of the model was 90.154%, while 91% removal efficiency was achieved as a result of the analysis.

Keywords

TiO2-ZrO2, Photocatalytic treatment, Surface response method, Central composite design

TiO2-ZrO2 katalizörüyle boya gideriminde fotokatalitik arıtım parametrelerinin yüzey yanıt yöntemiyle optimizasyonu

Abstract

Kimyasal süreçlerin optimizasyonu için, tek parametrenin değişken kabul edilip diğer parametrelerin sabit tutulması yoluyla gerçekleştirilen geleneksel yöntemler yetersiz kalmaktadır. Yüzey yanıt yöntemi gibi süreci modelleyerek parametrelerin etkileşimine de olanak tanıyan yöntemler hem finansal hem de zamansal açıdan avantaj sağlamaktadır. Bu çalışmada, Maksilon Mavi GRL boyasının fotokatalitik yöntemle giderim parametrelerinin modellenerek optimize edilmesi için yüzey yanıt yöntemi ve merkezi kompozit tasarımı kullanılmıştır. Giderim parametresi olarak katalizör konsantrasyonu, katalizörü üretirken kullanılan ZrO2 miktarı ve reaksiyon süresi seçilmiştir. Yanıt parametresi olarak ise renk giderim verimi incelenmiştir. Tek faktörlü analizde optimum koşullar 0.775g/L katalizör, 0.4 g ZrO2 miktarı ve 45dk. reaksiyon süresi olarak tespit edilmiştir. 3D yüzey ve kontur grafiklerinin analiziyle, katalizör konsantrasyonu ile ZrO2 miktarı parametreleri arasındaki etkileşimin az olduğu, reaksiyon süresi parametresi ile ZrO2 miktarı ve katalizör konsantrasyonu parametreleri arasındaki etkileşimin ise yüksek olduğu değerlendirmesi yapılmıştır. ANOVA analizi ve doğrulama deneyi sonuçları doğrultusunda modelin tahmin değerlerinin analiz değerlerini temsil edebileceği kanıtlanmıştır. Doğrulama deneyi için seçilen optimum seçenekte modelin tahmin ettiği değer %90.154 iken analiz sonucunda %91 giderim verimine ulaşılmıştır.

Keywords

TiO2-ZrO2, Fotokatalitik arıtma, Yüzey yanıt yöntemi, Merkezi kompozit tasarım

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