Acid Stabilization of Fly Ash from Coal Fired Power Plants

DOI

10.2991/ifeesm-15.2015.116How to use a DOI?

Keywords

fly ash; stabilization; heavy metals; phosphoric acid

Abstract

Heavy metals chemical stabilization with phosphoric acid was assessed for two kinds of fly ash in order to transform available heavy metals into insoluble metal phosphate compounds and reduce the risk to the environment. The behavior of heavy metals in the liquids and solids samples were both investigated. And pH, time and mass percentages of added phosphoric acid were as experimental parameters in this study. Three acid mass percents were analyzed for the two kinds of samples separately. Phosphoric acid reacted rapidly and 75% phosphoric acid was consumed during the 5 minutes at the beginning of the reaction. Arsenic and the other 8 heavy metals, such as Cr, Pb and Zn as the mainly elements were monitored during the 4h of reaction. The results showed that the elements concentrations in the liquid increased with the increase of phosphoric acid, the content decreased in the solid after the experiment, the mobility of heavy metals should depend on the acidity of the solution and the nature of the solids formed at the end of the stabilization.

Copyright

© 2015, 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  - Xiang Wei
AU  - Li Ying
PY  - 2015/09
DA  - 2015/09
TI  - Acid Stabilization of Fly Ash from Coal Fired Power Plants
BT  - Proceedings of the 2015 International Forum on Energy, Environment Science and Materials
PB  - Atlantis Press
SP  - 615
EP  - 618
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-15.2015.116
DO  - 10.2991/ifeesm-15.2015.116
ID  - Wei2015/09
ER  -