Browsing by Author "Kiril Mert, Berna"
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Item Application of nanofiltration and reverse osmosis for tanning wastewater(Springer, 2014-06) Kiril Mert, Berna; Kestioǧlu, Kadir; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 8910702800The aim to achieve in this study is to recover the Cr(III) and process waters' used in the wastewaters of chrome tanning operation by membrane process during leather production. In the treatment alternative contains, cartridge filter, nanofiltration (NF(NP10)), nanofiltration NF(XN45) and reverse osmosis RO(ACM2) membranes. The raw chrome wastewater from the cartridge filter was given to NF(NP10) membranes with 3 different pressures (12bar, 16bar, 18bar). In this alternative, the most appropriate pressure is determined as 20 bar and the COD, Cr(III) and SS values were detected as, in order, 65%, 49% and 87% for the removal efficiency. 2,7 times more concentration for Cr(III) was achieved in the NF (XN45) membrane, which was used after NF(NP10) membrane and COD, SS, SO4-2, Na+ and conductivity parameters showed removal efficiencies as, 75%, 89%, 95%, 38% and 16%. The permeate from RO(ACM2) membrane was decreased to the discharge criteria's; (Cr(III):2 mg/L, COD: 200 mg/L). As a result, the investment and the process cost of these membranes are more feasible.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.