Investigation of TNT red wastewater treatment technology using the combination of advanced oxidation processes.

Autor: Bui DN; Faculty of Environmental Technology, Viet Tri University of Industry, Viet Nam. Electronic address: vietnamkz@yahoo.com., Minh TT; Faculty of Environmental Technology, Viet Tri University of Industry, Viet Nam.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Feb 20; Vol. 756, pp. 143852. Date of Electronic Publication: 2020 Nov 21.
DOI: 10.1016/j.scitotenv.2020.143852
Abstrakt: Different types of advanced oxidation processes and their combinations such as O 3 /H 2 O 2 /UV, O 3 /Fenton/UV, O 3 /TiO 2 /UV, Fenton/H 2 O 2 /UV, Fenton/TiO 2 /UV, TiO 2 /H 2 O 2 /UV, TiO 2 /H 2 O 2 /O 3 /UV, TiO 2 /O 3 /Fenton/UV, TiO 2 /H 2 O 2 /Fenton/UV and O 3 /H 2 O 2 /Fenton/UV were studied for the treatment of undiluted red wastewater from Z113 Factory. The treatment efficiency was evaluated by analyzing chemical oxygen demand (COD) reduction, % degradation of α-TNT, 2,4-DNT, 2,6-DNT, 2,4-DNT-3-SO 3 Na and 2,4-DNT-5-SO 3 Na. Among studied processes Fenton/TiO 2 /O 3 /UV was the most effective technology to treat red wastewater. It allows to reduce >99% of COD, α-TNT, 2,4-DNT, 2,6-DNT, 2,4-DNT-3-SO 3 Na and 2,4-DNT-5-SO 3 Na after 30 h of treatment with optimum operating conditions: rotation speed of 600 rpm, pH of 4 and temperature of 40 °C. According to the chromatograms obtained by gas chromatograph/mass spectrometer (GC/MS), intermediates of the decomposition of pollutants in red wastewater were identified. GC/MS, HPLC, UV-vis and Bacterial Toxicity test were used to assess effluent quality changes before and after treatment. By economic analysis, the studied process had the potential to apply in practice to treat real wastewater at the Z113 Factory.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personalrelationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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