Soleymani, Ali Reza Saien, Javad Chin, Sungmin Le, Hoang Anh Park, Eunseuk Jurng, Jon Gsoo 2024-01-20T07:33:29Z 2024-01-20T07:33:29Z 2021-09-05 2015-03 0957-5820 https://pubs.kist.re.kr/handle/201004/125729 This work focuses on modeling and optimization of a sono-assisted photocatalytic decolorization process of a model pollutant, azo dye C.I. direct red 16 (DR16). In the process, a high temperature thermal decomposition nano synthesized titanium dioxide (TD-TiO2) was applied as photocatalyst. Central composite design (CCD) methodology was used for designing the experiments, modeling and optimization of the process. A quadratic model was established to describe dependency of the decolorization efficiency (DE), as the model response, to some effective operational parameters, i.e. the catalyst dosage, pH and the dye initial concentration. The ANOVA analysis confirmed that all of the variables have significant influence on the model response. Under the established optimum conditions, 92.4% DE was achieved after 45 min; however, to access desirable mineralization efficiency, the process should be continued up to 120 min. All withdrawn samples from the reaction media during the process showed no antibacterial activity, which indicates safety of the treated effluent for disposal into the environment. Also studies showed that the process proceeds via two parallel branches of photolysis and photocatalysis, where propagation of the ultrasonic waves into the reaction media plays a vital promoting role on the latter branch. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. English ELSEVIER WASTE-WATER AQUEOUS-SOLUTION METHYL-ORANGE DEGRADATION MINERALIZATION TIO2 DECOMPOSITION PHOTOREACTOR PARAMETERS REACTOR Modeling and optimization of a sono-assisted photocatalytic water treatment process via central composite design methodology Article 10.1016/j.psep.2014.07.004 1 PROCESS SAFETY AND ENVIRONMENTAL PROTECTION, v.94, pp.307 - 314 PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 94 307 314 scie scopus 000352048100029 2-s2.0-84928827665 Engineering, Environmental Engineering, Chemical Engineering Article WASTE-WATER AQUEOUS-SOLUTION METHYL-ORANGE DEGRADATION MINERALIZATION TIO2 DECOMPOSITION PHOTOREACTOR PARAMETERS REACTOR Nano TiO2 Photocatalysis Experimental design Modeling Optimization Mineralization