Interactions between photodegradation components

Chemistry Central Journal

Tahereh Abdollahi²  Majid Rezayi¹  Hossein Jahangirian¹  Kamyar Shameli¹  Khamirul Amin Matori²  Azmi Zakaria²  Yadollah Abdollahi² 

[1]Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang Selangor, Malaysia

[2]Material Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang Selangor, Malaysia

关键词: ZnO;    Variable-interaction;    Photodegradation;    Photocatalyst;    Multivariate;    Modeling;    Cross-product effects;   

Others  :  788076
DOI  :  10.1186/1752-153X-6-100

 received in 2012-06-22, accepted in 2012-08-28,  发布年份 2012

【 摘 要 】

Background

The interactions of p-cresol photocatalytic degradation components were studied by response surface methodology. The study was designed by central composite design using the irradiation time, pH, the amount of photocatalyst and the p-cresol concentration as variables. The design was performed to obtain photodegradation % as actual responses. The actual responses were fitted with linear, two factor interactions, cubic and quadratic model to select an appropriate model. The selected model was validated by analysis of variance which provided evidences such as high F-value (845.09), very low P-value (<.0.0001), non-significant lack of fit, the coefficient of R-squared (R² = 0.999), adjusted R-squared (R_adj² = 0.998), predicted R-squared (R_pred² = 0.994) and the adequate precision (95.94).

Results

From the validated model demonstrated that the component had interaction with irradiation time under 180 min of the time while the interaction with pH was above pH 9. Moreover, photocatalyst and p-cresol had interaction at minimal amount of photocatalyst (< 0.8 g/L) and 100 mg/L p-cresol.

Conclusion

These variables are interdependent and should be simultaneously considered during the photodegradation process, which is one of the advantages of the response surface methodology over the traditional laboratory method.

【 授权许可】

   
2012 Abdollahi et al.; licensee Chemistry Central Ltd.

【 图 表 】

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