Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 408, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.124922
Keywords
Methylene blue degradation; Waste tire char; Spent sealed radioactive source; Radiolysis; Synergism
Categories
Funding
- Ministry of Education, Science and technological development of the Republic of Serbia, Serbia
- Science and Technology Commission of Shanghai Municipality - The Belt and Road Initiative [18230742300]
- Ministry of Science and Technology of China, China
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Enhanced degradation of organic dye was achieved using waste tire granules and spent sealed radioactive sources. Waste tire char was used as an adsorbent matrix for synergetic adsorption/irradiation degradation of organic dye. OH radicals played a crucial role in the radiocatalytic degradation process.
Enhanced degradation of organic dye was achieved using two different kinds of waste materials: waste tire granules and spent sealed radioactive sources. Waste tire granules were used as raw material for the production of waste tire char (WTC), which was further utilized as an adsorbent matrix for synergetic adsorption/irradiation degradation of organic dye. The spent radioactive sources were radiographic sealed sources that originate from the industry which generate the high energy radiation. Methylene Blue (MB) was used as an organic model compound. Synthesized WTC has turbostratic structure, irregular shaped particles and developed mesoporous surface. Complete degradation of 0.02 dm(3) of 100 mg dm(-3) MB solution, having WTC dose of 1.25 g dm(-3), was achieved with delivered doze of only 60 Gy. The applied doses were 100 times smaller than those presented in the literature. Degradation pathway was determined: OH radicals that originate from radiolysis of water and from the surface of WTC played the crucial role in the radiocatalytic degradation of MB. Breakage of the aromatic ring of MB appeared by the scission of the double C-S+=C bond as a result of the attack of OH species on adsorbed and electronically reorganized MB molecule.
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