img
Comparison of reactive azo dye removal with UV/H2O2, UV/S2O82− and UV/HSO5− processes in aqueous solutions        
Yazarlar
Kübra Çobanoğlu
Doç. Dr. Nejdet DEĞERMENCİ
Türkiye
Özet
Advanced oxidation processes (AOPs) are an effective choice for removal of reactive azo dyes used in the textile industry due to high solubility and low degradability. Within the scope of this study, reactive orange 122 (RO122) azo dye was removed using the UV-based AOPs of ultraviolet (UV) radiation, UV/hydrogen peroxide (UV/H2O2), UV/persulfate (UV/S2O82−), and UV/peroxymonosulfate (UV/HSO5−). Oxidant concentration, initial solution pH, initial RO122 concentration, different anions (Cl−, NO3− and SO42−), and solution temperature effects were compared. With only UV radiation (254 nm), 19.5% RO122 removal occurred at the end of 120 min. The RO122 removal reduced with the UV/oxidant processes at pH 9. Experimental results revealed RO122 removal followed pseudo-first-order (PFO) kinetics. There was a linear correlation identified between initial oxidant concentration and the PFO kinetic rate constant (k1). Among the three UV-based processes, with oxidant concentration 50 mg/L, temperature 20 °C, and pH 5, RO122 removal efficiency was in the order UV/H2O2 > UV/HSO5− > UV/S2O82−. RO122 removal rate increased as initial oxidant concentration and temperature increased and reduced as initial RO122 concentration increased. Energy requirements and oxidant costs were assessed. The UV/H2O2 process was concluded to be the most efficient and economic process for RO122 removal.
Anahtar Kelimeler
Decolorization,Reactive orange 122,Azo dye,Advanced oxidation processes,Kinetics,Cost analysis
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Environmental Monitoring and Assessment
Dergi ISSN 1573-2959
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q3
Makale Dili İngilizce
Basım Tarihi 03-2022
Cilt No 194
Sayı 302
Sayfalar 1 / 14
Doi Numarası 10.1007/s10661-022-09964-z
Makale Linki http://dx.doi.org/10.1007/s10661-022-09964-z