Uklanjanje antrahinonskih boja iz vodenih rastvora adsorpcijom, elektrohemijskom oksidacijom i višim oksidacionim procesima
Removal of anthraquinone dyes from aqueous solutions by adsorption, electrochemical oxidation and advanced oxidation processes
Докторанд
Stupar, Stevan Lj.Ментор
Mijin, DušanЧланови комисије
Jančić-Heinemann, RadmilaOnjia, Antonije
Tomašević, Anđelka V.
Grgur, Branimir
Метаподаци
Приказ свих података о дисертацијиСажетак
U radu je ispitivana mogućnost uklanjanja ili razgradnje antrahinonskih boja C.I. kiselo
plavo 111 (AB111) i C.I. kiselo ljubičasto 109 (AV109) adsorpcijom, elektrohemijskom
oksidacijom i višim oksidacionim procesima.
Tokom ispitivanja uklanjanja ispitivanih antrahinonskih boja iz vodenih rastvora, korišćene
su čestice na bazi aluminijum-oksida dopovane različitim masenim udelom gvožđe(III)-oksida (4 i
13 mas. %) termički obrađene na temperaturama 700, 800 i 900 ℃. Karakterizacija termički
obrađenih čestica korišćenih tokom ispitivanja vršena je SEM-EDS i XRD analizama. Ispitan je
uticaj početne koncentracije adsorbenta i boje, početne vrednosti pH, vrste adsorbenta i temperature
na efikasnost uklanjanja boja i kinetiku adsorpcije. Takođe, određeni su i termodinamički modeli i
parametri adsorpcije antrahinonske boje AB111.
Ispitivanje obezbojavanja rastvora i razgradnje ispitivanih antrahinonskih boja
elektrohemijskom oksidacijom u zavisnosti od mehanizma procesa podeljeno je na dve ce...line:
direktnu i indirektnu elektrohemijsku oksidaciju. Tokom ispitivanja korišćena je IrOX anoda,
određena je zavisnost efikasnosti obezbojavanja rastvora od jačine struje, koncentracije elektrolita i
početne vrednosti pH rastvora. U radu je određen specifični utrošak električne energije u zavisnosti
od primenjene jačine struje.
Ispitivanje obezbojavanja rastvora i razgradnje molekula boja višim oksidacionim procesima
obuhvata primenu Fenton, foto-Fenton i elektro-Fenton (elektroasistirani-Fenton) procesa. Tokom
svih ispitivanja utvrđen je uticaj početne koncentracije vodonik-peroksida, Fe2+ jona i vrednosti pH
rastvora na efikasnost svih procesa, a tokom elektro-Fenton procesa ispitivan je i uticaj anode (IrOX
i Pt) i jačine struje na efikasnost i kinetiku obezbojavanja rastvora. Ispitan je i uticaj 2-propanola,
hlorida i sulfata na efikasnost obezbojavanja rastvora Fenton i elektro-Fenton procesima. U cilju
sagledavanja isplativosti procesa, izračunati su mogući troškovi obezbojavanja rastvora ovim
procesima.
Metoda UV-Vis spektrofotometrije je korišćena da bi se pratila promena koncentracije boje
tokom obezbojavanje rastvora. Efikasnost razgradnje boje AB111 elektrohemijskom oksidacijom i
višim oksidacionim procesima ispitivana je promenom vrednosti ukupnog organskog ugljenika
(TOC analiza). Joni koji su nastali razgradnjom boja detektovani su metodom jonske
hromatografije. Karakterizacija proizvoda razgradnje izvršena je FT-IR, HPLC-MS i GC-MS
analizama. Ispitivanjem klijanja Mung pasulja, određena su fitotoksikološka svojstva početnog
rastvora boje AB111 i rastvora dobijenih posle tretmana Fenton i elektro-Fenton procesima.
The removal or degradation of anthraquinone dyes C.I. Acid Blue 111 (AB111) and C.I.
Acid Violet 109 (AV109) was studied by adsorption, electrochemical oxidation, and advanced
oxidation processes.
During the investigation of the anthraquinone dyes’ removal from aqueous solutions,
alumina-based particles doped with different mass fractions of iron (III)-oxide (4 and 13 wt %)
thermally treated at temperatures of 700, 800, and 900 ℃ were used. The characterization of the
heat-treated particles used during the examination was performed by SEM-EDS and XRD analyses.
The influence of the initial concentration of adsorbent and dye, initial value of pH, type of
adsorbent and temperature on the efficiency of dye removal and adsorption kinetics was
investigated. Also, thermodynamic models and adsorption parameters of anthraquinone dye AB111
were determined.
The study of the decolorization and degradation of the anthraquinone dyes by
electrochemical oxidation depending on the process mechanism was... divided into two parts: direct
and indirect electrochemical oxidation. During the study, the IrOX anode was used, and the
dependence of the solution’s decolorization efficiency on the applied current, electrolyte
concentration, and initial pH value of the solution was determined. The specific consumption of
electricity depending on the applied current was determined.
The study of decolorization and degradation of the dyes by advanced oxidation processes
included the application of Fenton, photo-Fenton and electro-Fenton (electro-assisted-Fenton)
processes. During the study, the influence of the solution’s initial concentration of hydrogen
peroxide, Fe2+ ions and pH values on the efficiency of all processes was determined, and during the
electro-Fenton process the influence of the anode (IrOX and Pt) and current on the efficiency and
kinetics of the solution’s decolorization were examined. The influence of 2-propanol, chloride and
sulfate ions on the decolorization efficiency of the Fenton and electro-Fenton process was also
determined. In order to assess the cost-effectiveness of the process, the possible costs of
decolorization of the solution by these processes were calculated.
The UV-Vis spectrophotometry method was used to follow the change in the dyes’
concentration during the decolorization of the solution. The efficiency of AB111 degradation by
electrochemical oxidation and advanced oxidation processes was established by total organic
carbon analysis. Ions formed by dye degradation were detected by ion chromatography. The
characterization of the degradation products was performed by FT-IR, HPLC-MS and GC-MS
analyzes. The phytotoxicological properties of the AB111 dye solution as well as of the solutions
after the treatment by Fenton and electro-Fenton processes were determined using the Mung beans.