Soil Wasing and Recovery of Copper and Chromium from Highly Contaminated Soils

Start date 30/09/2011
End date The project is closed: 31/12/2014

The aim of this project is to develop a sustainable methodology for remediation and recovery of valuable metals from highly contaminated sites. These soils are to a large extent and to a high cost, both economically and environmentally, deposited at landfills. At the same time, valuable metals are taken away from the societal use instead of being recovered.

Samples from areas highly contaminated with copper and chromium are used in this study. The remediation method is based on soil washing, preferably using a waste liquid to minimize the use of virgin chemicals and to utilize wastes. Leaching efficiencies of more than 90 % copper has been received in several experiments within this study. From the leachate i.e. the washing solution metal ions can be recovered using e.g. precipitation or electrolysis. To reduce the energy usage if electrolysis is used bio electrochemical systems  is used. The need for a purifying and/or a reprocessing step before the final recovery is also studied.

The expectations are that this study will contribute with knowledge and experiences that can be further developed and used as a base for the construction of a remediation and recovery plant in pilot- and full scale. 
 

An article about the project p53-55_Karin_Karlfeldt_Fedje.pdfp53-55_Karin_Karlfeldt_Fedje.pdf

The project is carried out at the Division of Water Environment Technology.
 
More information can be found at the FRIST homepage
 
Keywords: Contaminated areas, metal recovery, soil washing, electrolysis
Project members

Project leader
Karin Karlfeldt Fedje

Project members  
Ann-Margret Strömwall
Lars Rosén
Oskar Modin
Sebastien Rauch

Contact
Karin Karlfeldt Fedje
External partners at the project
​The FRIST-group
​Formas Miljöteknik 
Renova

Published: Mon 28 Oct 2013.