Kartal, Ozlem EsenTurhan, Gulistan Deniz2024-08-042024-08-0420121944-39941944-3986https://doi.org/10.1080/19443994.2012.698813https://hdl.handle.net/11616/95867Decolourization of C.I. Reactive Orange 16 (RO16) via photocatalysis involving TiO2/UV and TiO2/UV/oxidant systems has been investigated. The experiments were carried out in a stirred cylindrical batch photoreactor under UV irradiation. The effects of pH, TiO2 concentration and addition of electron acceptors such as H2O2, Na2S2O8 and Cu+ ions were studied. The decolourization efficiency followed the order of pH 3 > pH 9 > pH 6 in TiO2/UV system. The addition of Cu+ ions to TiO2/UV/oxidant system significantly increased the decolourization efficiency. The performance of addition of 0.5 mM Cu+ ions to TiO2/UV/Na2S2O8 system was also evaluated by using synthetic dye-bath effluent. The results reveal that almost complete decolourization (99%) was achieved with RO16, while 76% decolourization was obtained with synthetic dye-bath effluent after 360 min of reaction time. Similar trend was observed with COD measurements. The rate of decolourization of RO16 was found to follow pseudo-first order kinetics and obeys L-H model. When the suspension of TiO2 containing RO16 was exposed to solar irradiation, 90% of decolourization and 64% of COD removal were obtained after 120 min of reaction time. Degradation products of RO16 were determined by LCMS.eninfo:eu-repo/semantics/closedAccessReactive Orange 16TiO2/UVDecolourizationNa2S2O8Cu+ ionsHydroxyl radicalsArticle481-319920610.1080/19443994.2012.6988132-s2.0-84870222907Q3WOS:000311371500022Q3