Browsing by Author "Yonar, Taner Yona"
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Item Chemical oxygen demand and color removal from textile wastewater by UV/H2O2 using artificial neural networks(Wiley, 2013-08-13) Yonar, Taner Yona; Yalılı , Melike Kılıç; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0002-0387-0656; AAD-9468-2019; AAG-8505-2021; 6505923781; 55897413400The photooxidation of pollutants, especially chemical oxygen demand (COD) and color, in textile industrial wastewater was performed in the presence of hydrogen peroxide (H2O2), using 256 nm UV light (15 W), to model the discoloration and COD elimination processes and characterize the influence of process variables. Within this study, data were obtained through a NeuroSolutions 5.06 model and successfully tested. Each sample was characterized by three independent variables (i.e., pH, H2O2 concentration, and time of operation) and two dependent variables (i.e., color and COD). The results indicated that pH was the predominant variable, and the reaction mean time and H2O2 volume were the less influential variables. The neural model obtained presented coefficients of correlation of 99% for COD and 97% for color, indicating the prediction power of the model and its character of generalization.Item Landfill leachate treatment by fenton and fenton-Like oxidation processes(Wiley, 2013-06-07) Kiril , Berna Mert; Yalılı Kılıç, Melike; Yonar, Taner Yona; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0002-0387-0656; AAD-9468-2019; AAG-8505-2021; HKF-2179-2023; 55897413400; 6505923781The treatment of landfill leachate with physico-chemical and Fenton and Fenton-like processes was investigated. Additionally, the acute toxicities of the raw, the physico-chemical pre-treated, and the Fenton and Fenton-like oxidation treated leachates on activated sludge microorganisms are given (determined by the ISO 8192 (respiration inhibition test)). Pre-treatment with lime positively affected the biodegradability of the sludge by preventing inhibition. The Fenton and Fenton-like processes resulted in high chemical oxidation demand (COD) (>80%) removal performance from leachate samples. The inhibitory effects of the Fenton and Fenton-like reagents on activated sludge mixtures decreased. In addition to toxicity, the COD removal efficiencies and the operation costs of the applied processes were determined.Publication Treatment of jewelry manufacturing effluent containing cyanide using ozone-based photochemical advanced oxidation processes(Taylor & Francis, 2014-03-04) Kiril Mert, Berna; Sivrioğlu, Özge; Yonar, Taner Yona; Özçiftçi, Saire; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0002-0387-0656; 0000-0001-7974-9986; AAM-8073-2020; AAD-9468-2019; FOT-8901-2022; 56114896700; 6505923781; 56115129400This article considers Advanced Oxidation Processes involving O-3, O-3/UV, O-3/H2O2/UV, and H2O2/UV to destroy cyanide in jewelry manufacturing wastewaters. All experiments were performed in a semibatch reactor. The results showed that total cyanide can be reduced with different reaction rates, and the decrease of total cyanide can be described by pseudo-first-order kinetics. The reaction was performed under different pH values and H2O2 dosages to find the optimal conditions for the oxidation processes. The ozonation process destroyed total cyanide faster at a pH = 12, whereas ozonation combined with H2O2 and/or UV destroyed cyanide faster at a pH =10. The total cyanide destruction rate in the UV/H2O2 (700 mg/L) treatment was the highest among all studied processes, with removal efficiencies of 99% for CN-, 99% for COD and 99% for TOC.