Influencing Factors and Kinetics of Degradation of Unsym-Dimethylhydrazine Waste Water by H2O2/UV/O3 Process

Zelong Xu, Lingzhi Huang, Fei Chen, Yi Wu

Abstract

The treatment of unsym-dimethylhydrazine (UDMH) waste water through H2O2 (hydrogen peroxide)/UV(ultraviolet) /O3(ozone) combined process was carried out when temperature was 30.0±0.6℃ and pH was 9.0±0.2. The influences of pre-treatment conditions, UV radiation intensity and wavelength ratio, O3 dosing rate and initial concentration on the removal efficiency of UDMH and COD were researched. The results showed that the degradation rate of UDMH and COD increased as hydrogen peroxide dosage, aeration gas velocity and time of pre-treatment process, UV radiation intensity and O3 dosing rate increased. And the rate decreased as the initial concentration increased, and the rate of ozone dosing and the intensity of ultraviolet radiation were the two factors that had the greatest impact on the reaction rate. The removal efficiencies of UDMH and COD were 100% and 98.62% at the UDMH concentration of 5000 mg·L-1 for 60 min under the optimum conditions of the system. To conclude, there were significant synergistic effects in this system. In the initial stage, the reaction was mainly led by ultraviolet light while in the middle and late stages, the reaction was conducted and promoted by hydrogen peroxide.

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Paper Citation


in Harvard Style

Xu Z., Huang L., Chen F. and Wu Y. (2018). Influencing Factors and Kinetics of Degradation of Unsym-Dimethylhydrazine Waste Water by H2O2/UV/O3 Process.In Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG, ISBN 978-989-758-342-1, pages 92-98. DOI: 10.5220/0007426300920098


in Bibtex Style

@conference{iweg18,
author={Zelong Xu and Lingzhi Huang and Fei Chen and Yi Wu},
title={Influencing Factors and Kinetics of Degradation of Unsym-Dimethylhydrazine Waste Water by H2O2/UV/O3 Process},
booktitle={Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,},
year={2018},
pages={92-98},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007426300920098},
isbn={978-989-758-342-1},
}


in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Environment and Geoscience - Volume 1: IWEG,
TI - Influencing Factors and Kinetics of Degradation of Unsym-Dimethylhydrazine Waste Water by H2O2/UV/O3 Process
SN - 978-989-758-342-1
AU - Xu Z.
AU - Huang L.
AU - Chen F.
AU - Wu Y.
PY - 2018
SP - 92
EP - 98
DO - 10.5220/0007426300920098