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Adsorption of P-Cresol on Al2o3 Coated Multi-Walled Carbon Nanotubes: Response Surface Methodology and Isotherm Study Publisher



Jaafari J1, 2 ; Ghozikali MG3 ; Azari A4 ; Delkhosh MB5 ; Javid AB6 ; Mohammadi AA7 ; Agarwal S8 ; Gupta VK8 ; Sillanpaa M9, 10 ; Tkachev AG11 ; Burakov AE11
Authors

Source: Journal of Industrial and Engineering Chemistry Published:2018


Abstract

The development and design of adsorbents with high adsorption performance is an effective method of removing p-Cresol from effluent for environmental protection. Therefore, an Al2O3 coated multiwalled carbon nanotubes (MWNTs) composite for adsorption of p-Cresol from aqueous solution was synthesized. The p-Cresol concentration was determined by estimating the absorbance of the sample solution on a DR5000 UV/vis spectrophotometer. Box–Behanken design (BBD) was involved in the optimization of p-Cresol adsorption upon Al2O3 coated MWNTs adsorbent against the process parameters time, pH and adsorbent dose. The effects of these factors were studied in the ranges 5–40 min, 4–10, and 0.2–2 g L−1, respectively. The lack of fit obtained for this model was 0.357 which confirmed that the model is highly significant and the experiments are accurate and reliable. The results showed that adsorption isotherms fit well with the pseudo-second-order kinetic model and Langmuir isotherm model and Qmax was calculated to be 54.05 mg/g. Our results demonstrate that Al2O3 coated MWNTs has the potential to be used as an effective adsorbent for the rapid uptake of p-Cresol from aqueous solutions. © 2017 The Korean Society of Industrial and Engineering Chemistry
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