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2,4,6‐Triamino‐1,3,5‐Trinitrobenzene Explosive Wastewater Treatment by Hydrodynamic Cavitation Combined with Chlorine Dioxide
Author(s) -
Wang Kun,
Jin Riya,
Qiao Yina,
He Zengdi,
Wang Xiaojian,
Wang Chaoqi,
Lu Yanrong
Publication year - 2020
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201900356
Subject(s) - tatb , wastewater , chlorine dioxide , chemistry , chemical oxygen demand , chlorine , nuclear chemistry , explosive material , pulp and paper industry , inorganic chemistry , environmental engineering , organic chemistry , detonation , environmental science , engineering
A large amount of wastewater is produced in the process of 2,4,6‐Triamino‐1,3,5‐trinitrobenzene (TATB) production, which is harmful to the environment and human health. In this work, the removal rate of chemical oxygen demand (COD) from TATB wastewater was investigated by using hydrodynamic cavitation (HC), chlorine dioxide (ClO 2 ), and the combination of the HC and ClO 2 . We explored the effects of different operating parameters on extent of degradation including time (10–60 min), concentration of ClO 2 (25–150 mg/L) and initial pH (6, 9.25). The result showed that the reduction of COD from explosive wastewater with initial concentration of 5407 mg COD/L was 65.9 % after a 60 min treatment with a ClO 2 dosage of 150 mg/L at a pH of 6. The COD removal process by the HC/ClO 2 conforms to a pseudo‐first‐order kinetic equation with a reaction rate of 20.8×10 −3 min −1 . We were able to determine that the HC/ClO 2 method has a synergistic effect on TATB wastewater treatment with a synergetic coefficient of 3.01. By comparing the cavitational yield and cost of each process, the HC/ClO 2 has a higher energy efficiency (26.78×10 −3 mg/J). In conclusion, the HC/ClO 2 composite process is more economical, effective, and suitable for large‐scale commercial operations.