Electrochemical treatment of wood combustion fly ash for the removal of cadmium

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Abstract

Due to a high content of macronutrients and a potential liming capacity, recycling of ashes from biomass combustion to agricultural fields as fertilisers and/or for soil improvement is considered in Denmark and other countries utilising biomass as an energy source. However, especially the fly ash fractions contain amounts of the toxic heavy metal Cd that may exceed the limiting values for agricultural utilisation given by the Danish EPA. In this work the advances of using an electrochemical remediation method to reduce the Cd content in wood combustion fly ash - for the aim of recycling - is described. The method, which is named electrodialytic remediation, uses a low voltage direct current a cleaning agent. Under optimised remediation conditions with the fly ash suspended in a 0.25 M ammonium citrate mixture, more than 70 % of the initial Cd was removed from the wood fly ash using electrodialytic remediation.
Original languageEnglish
Title of host publicationAbstracts of Papers. 224th ACS National Meeting, Boston.
PublisherAmerican Chemical Society
Publication date2002
Publication statusPublished - 2002
Event224th ACS National Meeting, Boston, MA - Boston, MA, USA, August 18-22, 2002
Duration: 1 Jan 2002 → …

Conference

Conference224th ACS National Meeting, Boston, MA
CityBoston, MA, USA, August 18-22, 2002
Period01/01/2002 → …

Cite this

Damø, A. J. (2002). Electrochemical treatment of wood combustion fly ash for the removal of cadmium. In Abstracts of Papers. 224th ACS National Meeting, Boston. American Chemical Society.