Comparação entre diferentes processos oxidativos avançados para degradação de corante azo Comparison of various advanced oxidation processes for azo dye degradation
نویسندگان
چکیده
This study aimed at comparing various advanced oxidation processes (H2O2, UV, UV/H2O2, Fe /H2O2, UV/Fe /H2O2) for textile dye Reactive Red 195 decolorization. The use of blast furnace dust (BFD) was also investigated as an alternative source of iron in catalytic peroxidation with and without UV radiation. The effects of H2O2 and dye concentrations in kinetics of decolorization were studied. Decolorization reactions follow pseudo-first order kinetics. The results indicated greater efficiency of decolorization in the photo-Fenton system with the use of BFD; however, the use of BFD in the Fenton system without irradiation reached the same efficiency with a reaction time only 15 minutes superior. The use of blast furnace dust increased considerably the rates of reactions and is very promising as a source of iron.
منابع مشابه
Interaction of Anionic Azo Dye and TTAB - Cationic Surfactant
A interação entre três corantes aniônicos azo: C.I. Vermelho Ácido 14 (AR14), C.I. Vermelho Ácido 1 (AR1), C.I. Laranja Ácido 7 (AO7) e um surfactante catiônico, o brometo de tetradeciltrimetilamônio (TTAB), foi investigada por meio da técnica de eletrodo seletivo para surfactante. O eletrodo seletivo para TTAB foi construído e usado para determinar a concentração de monômeros TTAB e, também, d...
متن کاملIron Porphyrins as Biomimetical Models for Disperse Azo Dye Oxidation
As ferroporfirinas comerciais cloreto de 5,10,15,20-tetraquis-(4-carboxifenil) porfirinaferro(III), cloreto de 5,10,15,20-tetraquis-(N-metil-4-piridil)porfirinaferro(III) e cloreto de 5,10,15,20-tetraquis-(2,3,4,5,6-pentafluorofenil)porfirinaferro(III) foram investigadas como modelo do citocromo P450 na oxidação dos azo corantes Disperse Black 3 (DB3), Disperse Orange 3 (DO3) e Methyl Yellow (M...
متن کاملComparative Study of Oxidation of Some Azo Dyes by Different Advanced Oxidation Processes: Fenton, Fenton-Like, Photo-Fenton and Photo-Fenton-Like
This study makes a comparison between Fenton, Fenton-like, photo-Fenton and photo-Fenton-like treatment methods to investigate the removal of two acid dyes. The two selected acid dyes are C.I. Acid Orange 8 (AO8) and C.I. Acid Red 17 (AR17). These were chosen as model organic contaminants. The effect of operating parameters, such as amount of Fenton’s reagent (H2O2 and Fe) and Fenton’s-like rea...
متن کاملEnhanced Oxidation of Azo Dye Using Ag-SiO2 Nanoparticle and Peroxydisulfate and Kinetic Study
Present work investigates the capability of oxidative treatment process in the presence of nano silver doped on silicate particles for decolorization of a widely used azo dye, C.I. Direct Blue 129 (DB129) in water samples. Solutions with initial concentration of 20 mgL-1 of dye, within the range of generic concentration in textile wastewaters, were treated under ambient conditions of initial pH...
متن کاملThe kinetic study of the AZo Dye Decolourisation by advanced oxidation process
In the present study, advanced oxidation treatment, UV/ was applied to decolourisation of Acid Orange 8 (AO8). The UV radiation was carried out with a 15 W low-pressure mercury lamp. Kinetic model for the decolourisation of the dye was developed based on experimental results and known chemical and photochemical reactions. The observed kinetic reaction constant was determined and correlated as a...
متن کامل