Naslov
Low frequency US and UV-A assisted Fenton oxidation of simulated dyehouse wastewater

Autori
Grčić, Ivana ; Maljković, Marija ; Papić, Sanja ; Koprivanac, Natalija

Izvornik
Journal of hazardous materials (0304-3894) 197 (2011); 272-284

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
simulated dyehouse wastewater; US and UV-A Fenton process; Box-Behnken design; mixture design; optimization; surfactants

Sažetak
The scope of the presented study was to explore the treatment possibilities for the simulated dyehouse wastewater (WW) by the Fenton oxidation ultrasonic (US) or UV-A assisted. Composition of WW included reactive azo dye, C.I. Reactive Violet 2 (RV2), anionic surfactant (LAS) and auxiliary chemicals. An emphasis was put on the influence of the LAS on the treatment efficiency. To explore the pseudo-catalytic effect of LAS and reagent dosages on the extents of decolourization and mineralization, different experimental design techniques were utilized. Box-Behnken design was used as a base for optimization and determination of the influencing factors ; numerical (Fe2+/3+, H2O2 and LAS concentration) and categorical factors (iron oxidation state and type of additional energy ; US or UV-A). Furthermore, a mixture design methodology was applied. This two-step optimization approach lead to a single optimal point for two advanced oxidation processes studied in comparison. Models describing the dependency of the overall efficiency on influencing factors were obtained. Application of US/Fe2+/H2O2 and UV-A/Fe2+/H2O2 processes for the treatment of WW was assessed. Only 26% of mineralization was achieved by Fenton process alone applied for the treatment of the dyehouse effluent in 10-fold dilution, while 43% of mineralization was achieved by US or UV-A assisted Fenton after the 60 minutes.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA