Aysun ÖZKAN, Şahin IŞIK, Zerrin GÜNKAYA, Kemal ÖZKAN, Mufide BANAR

ATIK PORTAKAL KABUKLARI ÜZERİNE PALADYUM ADSORPSİYONU İÇİN FARKLI MODELLEME YÖNTEMLERİNİN KARŞILAŞTIRILMASI

Bu çalışmanın amacı, paladyumun giderimi için atık portakal kabuklarının adsorpsiyon potansiyelini değerlendirmektir. Doğrusal modeller arasında Langmuir izoterm modeli adsorpsiyon prosesi için en uygun olarak belirlenmiştir. Yalancı ikinci dereceden modelin adsorpsiyon kinetik analizi, partikül içi taşınmanın tek hız sınırlayıcı adım olmadığını ortaya koymuştur. Doğrusal olmayan matematiksel modellemeye göre, Yumuşatılmış Spline modeli daha yüksek R2 ve daha düşük Toplam Kare Hatası (SSE) ve Kök Ortalama Kare Hatası (RMSE) ile en uygun model olmuştur. Adsorpsiyon çalışmalarında R2'nin yanı sıra, SSE ve RMSE değerlerinin de dikkate alınması gerektiği sonucuna varılmıştır.

Anahtar Kelimeler:

Adsorpsiyon, Eğri uydurma, nonlineer modelleme, paladyum

COMPARISON OF DIFFERENT MODELING METHODS FOR PREDICTION OF PALLADIUM ADSORPTION ONTO WASTE ORANGE PEEL

The objective of this work was to evaluate the adsorption potential of waste orange peels for the removal of palladium. Among linear models, Langmuir isotherm model was more suitable for the adsorption process. Adsorption kinetics analysis of pseudo-second-order model revealed that intraparticle transport was not the only rate-limiting step. Analysis based on the nonlinear mathematical modeling indicated that Smoothing Spline model shows best fitting with higher R-square (R2) and lower Sum of Square Error (SSE) and Root Mean Square Error (RMSE). It was concluded that the SSE and RMSE values should be taking into account as well as R2 in the adsorption studies.

Keywords:

Adsorption, Curve fitting, Nonlinear modeling, Palladium,

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