Gamma radiation induced degradation of anthraquinone Reactive Blue-19 dye using hydrogen peroxide as oxidizing agent. (March 2020)

• Record Type: Journal Article
• Authors: Arshad, Rabia; Bokhari, Tanveer H.; Khosa, Kaleem K.; Bhatti, Ijaz A.; Munir, Majid; Iqbal, Mazhar; Iqbal, Dure N.; Khan, M.I.; Iqbal, Munawar; Nazir, Arif
• Is Part Of: Radiation physics and chemistry. Volume 168(2020:Mar.)
• Publication Date: 2020-03
• Subjects: Reactive Blue-19 -- Gamma irradiations -- FTIR -- Toxicity -- Dye degradation -- LC-MS; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2019.108637
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: The gamma irradiation-induced degradation of Reactive Blue-19 (RB-19) as a model system in aqueous media has been evaluated. The process variables such as dye initial concentration (50–150 ppm), H2 O2 concentration (0.1–0.9 ml) and gamma radiation absorbed dose (1–12 kGy) were optimized to get maximum degradation. The efficiency of AOP was assessed on the basis of degradation, reduction in COD/BOD and toxicity of the dye. A complete degradation and 60% removal in COD/BOD were obtained at H2 O2 (0.9 ml) under the gamma radiation absorbed dose of 12 kGy. The UV/Vis spectrophotometer was used to investigate the change in absorbance before and after irradiation. The radiolytic progress and degraded end-products of the treated samples were determined by comparing the before and after irradiation dye spectra of FT-IR. The results of FTIR spectra showed that the anthraquinone structures, nitrogen linkages and amino groups of RB-19 were destroyed under gamma irradiation. The identification by LC-MS analyses indicated that some organic acids (e.g. phthalic acid) could be the primary degradation products. The hemolytic test showed 19.30% hemolysis, while gamma/H2 O2 treatment reduced mutagenicity up to 89.7% and 97.91% against TA98 and TA100 bacterial strains, respectively. The study showed that the gamma radiation based advanced oxidation process can be favorable and probably be used for the remediation of dyes waste-water having toxic dyes. Highlights: Gamma irradiation induced degradation of RB-19 was evaluated. Dye initial conc., H2 O2 conc. and radiation dose were optimized to get maximum degradation. LC-MS analyses indicated organic acids could be the primary degradation products. Gamma/H2 O2 treatment reduced mutagenicity from 89.7% & 97.91% against TA98 & TA100. Gamma radiation based AOP could probably be used for the remediation of dye waste-water.