Ebrahim Abouzari-Lotf - Modeling of photodegradation process to remove the higher concentration of environmental pollution

Document created by Ebrahim Abouzari-Lotf on Aug 13, 2015
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  Publication Details (including relevant citation   information):

  Abdollahi, Y., Zakaria, A., Said, S.B.M., Sabri, M.F.B.M., Sairi,   N.A., Rezayi, M., Abouzari-lotf, E., Dorraj, M., Islam, A. -

  Abstract: Environmental organic pollutants are   mineralized to harmless final-products such H2O and CO2 by   photocatalytic advanced oxidation processes (AOPs). In   photocatalytic-AOPs, an appropriate concentration of p-Cresol was   mixed with certain amount of ZnO in 500 mL deionized water   according to an experimental-design. Then the mixture was   irradiated by UV-A lamp at different pH for 6 h. At specific   time intervals, the sampling was carried out to calculate the   efficiency of the photodegradation. Therefore, the   photodegradation as a system consists of four input variables   such irradiation time, pH, amount of ZnO and p-Cresol’s   concentration while the only output was the efficiency. In this   work, the system was modeled and optimized by semi-empirical   response surface methodology. To obtain the empirical responses,   the design was performed in laboratory. Then observed responses   were fitted with several well-known models by regression process   to suggest a provisional model. The suggested model which was   validated by several statistical evidence, predicted the   desirable condition with higher efficiency. The predicted   condition consisted of irradiation time (280 min), pH (7.9),   photocatalyst (1.5 g L−1), p-Cresol (95 mg L−1) and   efficiency (95%) which confirmed by further experiments. The   closed confirmation results has presented the removal   (efficiency = 94.7%) of higher p-Cresol concentration   (95 mg L−1) at shorter irradiation time in comparison with   the normal photodegradation efficiency (97%) which included   irradiation time (300 min), pH (7.5), photocatalyst amount   (1.5 g L−1) and p-Cresol (75 mg L−1). As a conclusion,   the modeling which is able to industrial scale up succeeded to   remove higher concentration of environmental organic pollutants   with ignorable reduction of efficiency. © 2015 Balaban   Desalination Publications. All rights reserved.

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