Title (srp)

Uklanjanje antrahinonskih boja iz vodenih rastvora adsorpcijom, elektrohemijskom oksidacijom i višim oksidacionim procesima : doktorska disertacija

Author

Stupar, Stevan Lj., 1991-

Contributor

Mijin, Dušan, 1962-
Jančić-Heinemann, Radmila, 1965-
Onjia, Antonije, 1966-
Tomašević, Anđelka V., 1960-
Grgur, Branimir, 1965-

Description (eng)

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 advancedoxidation 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 theheat-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 ofadsorbent and temperature on the efficiency of dye removal and adsorption kinetics wasinvestigated. Also, thermodynamic models and adsorption parameters of anthraquinone dye AB111were determined.The study of the decolorization and degradation of the anthraquinone dyes byelectrochemical oxidation depending on the process mechanism was divided into two parts: directand indirect electrochemical oxidation. During the study, the IrOX anode was used, and thedependence of the solution’s decolorization efficiency on the applied current, electrolyteconcentration, and initial pH value of the solution was determined. The specific consumption ofelectricity depending on the applied current was determined.The study of decolorization and degradation of the dyes by advanced oxidation processesincluded 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 hydrogenperoxide, Fe2+ ions and pH values on the efficiency of all processes was determined, and during theelectro-Fenton process the influence of the anode (IrOX and Pt) and current on the efficiency andkinetics of the solution’s decolorization were examined. The influence of 2-propanol, chloride andsulfate ions on the decolorization efficiency of the Fenton and electro-Fenton process was alsodetermined. In order to assess the cost-effectiveness of the process, the possible costs ofdecolorization 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 byelectrochemical oxidation and advanced oxidation processes was established by total organiccarbon analysis. Ions formed by dye degradation were detected by ion chromatography. Thecharacterization of the degradation products was performed by FT-IR, HPLC-MS and GC-MSanalyzes. The phytotoxicological properties of the AB111 dye solution as well as of the solutionsafter the treatment by Fenton and electro-Fenton processes were determined using the Mung beans.

Description (srp)

U radu je ispitivana mogućnost uklanjanja ili razgradnje antrahinonskih boja C.I. kiseloplavo 111 (AB111) i C.I. kiselo ljubičasto 109 (AV109) adsorpcijom, elektrohemijskomoksidacijom i višim oksidacionim procesima.Tokom ispitivanja uklanjanja ispitivanih antrahinonskih boja iz vodenih rastvora, korišćenesu čestice na bazi aluminijum-oksida dopovane različitim masenim udelom gvožđe(III)-oksida (4 i13 mas. %) termički obrađene na temperaturama 700, 800 i 900 ℃. Karakterizacija termičkiobrađenih čestica korišćenih tokom ispitivanja vršena je SEM-EDS i XRD analizama. Ispitan jeuticaj početne koncentracije adsorbenta i boje, početne vrednosti pH, vrste adsorbenta i temperaturena efikasnost uklanjanja boja i kinetiku adsorpcije. Takođe, određeni su i termodinamički modeli iparametri adsorpcije antrahinonske boje AB111.Ispitivanje obezbojavanja rastvora i razgradnje ispitivanih antrahinonskih bojaelektrohemijskom oksidacijom u zavisnosti od mehanizma procesa podeljeno je na dve celine:direktnu i indirektnu elektrohemijsku oksidaciju. Tokom ispitivanja korišćena je IrOX anoda,određena je zavisnost efikasnosti obezbojavanja rastvora od jačine struje, koncentracije elektrolita ipočetne vrednosti pH rastvora. U radu je određen specifični utrošak električne energije u zavisnostiod primenjene jačine struje.Ispitivanje obezbojavanja rastvora i razgradnje molekula boja višim oksidacionim procesimaobuhvata primenu Fenton, foto-Fenton i elektro-Fenton (elektroasistirani-Fenton) procesa. Tokomsvih ispitivanja utvrđen je uticaj početne koncentracije vodonik-peroksida, Fe2+ jona i vrednosti pHrastvora na efikasnost svih procesa, a tokom elektro-Fenton procesa ispitivan je i uticaj anode (IrOXi 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 ciljusagledavanja isplativosti procesa, izračunati su mogući troškovi obezbojavanja rastvora ovimprocesima.Metoda UV-Vis spektrofotometrije je korišćena da bi se pratila promena koncentracije bojetokom obezbojavanje rastvora. Efikasnost razgradnje boje AB111 elektrohemijskom oksidacijom ivišim oksidacionim procesima ispitivana je promenom vrednosti ukupnog organskog ugljenika(TOC analiza). Joni koji su nastali razgradnjom boja detektovani su metodom jonskehromatografije. Karakterizacija proizvoda razgradnje izvršena je FT-IR, HPLC-MS i GC-MSanalizama. Ispitivanjem klijanja Mung pasulja, određena su fitotoksikološka svojstva početnograstvora boje AB111 i rastvora dobijenih posle tretmana Fenton i elektro-Fenton procesima.

Description (srp)

Tehnološko inženjerstvo - Hemijsko inženjerstvo / Technological Engineering - Chemical Engineering Datum odbrane: 07.06.2021.

Object languages

Serbian

Date

2021

Rights

Creative Commons License
This work is licensed under a
CC BY-NC-ND 3.0 AT - Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Austria License.

http://creativecommons.org/licenses/by-nc-nd/3.0/at/legalcode

Subject

OSNO - Opšta sistematizacija naučnih oblasti, Hemijsko inženjerstvo

C.I. Acid Blue 111, C.I. Acid Violet 109, wastewater, adsorption, alumina, electrochemical oxidation, advanced oxidation processes

Identifiers