Kinetics Analysis of Dicamba Degradation using O3-Fly Ash Combined Process at Different pH values

DOI

10.2991/emcpe-16.2016.128How to use a DOI?

Keywords

Ozone; Fly Ash; Dicamba; Degradation

Abstract

Decamba degradation using ozone-fly ash combined process has been studied in laboratory. The effect of pH value on dicamba degradation was investigated. Kinetic analysis was carried out. The experimental results show that pH value has a significant influence on dicamba degaration. The increase of pH value promotes dicamba degradation. Degradation rate constant (k) is obtained using pseudo-first-order kinetics to fit the concentration of dicamba. Along with pH value increases, k value first increases rapidly, and then increases slow, after that it tends to be steady. High pH value can promote the generation of hydroxyl radicals, enhance the dissociation of dicamba in aqueous solution, and neutralize acidic materials produced during the degradation of dicamba using O3-fly ash combined process. Collected from different positions of one thermal power plant, finer fly ash has better promotion performance than coarser fly ash on improving ozonation process. The relationship of k value and pH value can be fitted well using exponential decay model.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lan Chen
PY  - 2016/08
DA  - 2016/08
TI  - Kinetics Analysis of Dicamba Degradation using O3-Fly Ash Combined Process at Different pH values
BT  - Proceedings of the 2016 5th International Conference on Environment, Materials, Chemistry and Power Electronics
PB  - Atlantis Press
SP  - 451
EP  - 454
SN  - 2352-5401
UR  - https://doi.org/10.2991/emcpe-16.2016.128
DO  - 10.2991/emcpe-16.2016.128
ID  - Chen2016/08
ER  -