It has been brought to the attention of the PLOS ONE editors that this article contains substantial overlap in text and scientific content with the two publications below by the same authors:
E-Journal of Chemistry, Volume 9 (2012), Issue 2, Pages 766-771
Improvement of Landfill Leachate Biodegradability with Ultrasonic Process
Braz J Chem Eng Vol.29 no.2
Use of a sonocatalytic process to improve the biodegradability of landfill leachate
The PLOS ONE editors retract this article as we consider that this constitutes redundant publication.
The second author Ali Akbar Roodbari has taken responsibility for the duplication, the other authors were unaware of the different submissions for the manuscript
Citation: The PLOS ONE Editors (2014) Retraction: Improvement of Landfill Leachate Biodegradability with Ultrasonic Process. PLoS ONE 9(4): e96133. doi:10.1371/journal.pone.0096133
Published: April 18, 2014
Copyright: © 2014 The PLOS ONE Editors. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.