Modeling efficiency of dehydrated sunflower seed cake as a novel biosorbent to remove a toxic azo dye
Yükleniyor...
Dosyalar
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Dehydrated sunflower seed cakes (DSSC), a low-cost by-product of oil industry, were utilized as a novel biosorbent to remove Acid Orange 7 (AO7) from aqueous solution. This study aimed at modeling biosorption efficiency as a function of temperature, initial pH, biosorbent size, reaction time, mixing speed, and initial dye and biosorbent concentrations. The combined use of Plackett-Burman (PBD) and central composite (CCD) designs adopted in this study is also one of the main novel contributors to the adsorption literature. Another important finding of the study includes a significant breakdown of the (hemi)cellulosic structure of SSC, but no significant effect of acid hydrolysis on lignin when SSC was treated with sulfuric acid. The lowest initial dye concentration of 50mg/L, temperature of 40 degrees C, reaction time of 90min, and DSSC concentration of 1.5g/L resulted in the maximum biosorption efficiency of 97.1%. Cross-validation of the best-fit multiple nonlinear regression model led to a high predictive power (R-pred(2)) of 92.5% and to a high goodness-of-fit value (R-adj(2)) accounting for 97.7% of variation in biosorption efficiency. The best-fit pseudo-second-order kinetic model and Langmuir isotherm elucidated the exothermic and spontaneous biosorption process.
Açıklama
Anahtar Kelimeler
Acid Orange 7, Central-Composite Design, Data-Driven Modeling, Dehydrated Sunflower Seed Cake, Plackett-Burman Design
Kaynak
Chemical Engineering Communications
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
203
Sayı
6
