Statistical Modeling of Contaminants Removal in Mature Integrated Constructed Wetland Sediments
Publication: Journal of Environmental Engineering
Volume 138, Issue 10
Abstract
Multiple regression models, principal component analysis, redundancy analysis, and the self-organizing map (SOM) model were applied to assess the effects of physico-chemical parameters on the treatment performance of contaminated wetland sediments in replicate integrated constructed wetland (ICW) mesocosms treating either farmyard runoff or domestic wastewater. Dissolved oxygen concentration and conductivity were correlated with the reduction of ammonia–nitrogen () and/or molybdate reactive phosphorus (MRP), and the redox potential and conductivity were related to chemical oxygen demand (COD) removal. SOM was selected as the prediction model to provide numerical estimations for the performance of ICW mesocosms. The model was validated, indicating that , MRP, and COD removal can be predicted by input variables that are quick and cost-effective to measure. The SOM model is an appropriate method for monitoring the performance of mature ICWs as a source of contaminants such as nitrogen and phosphorus. Although no reduction in the overall performance was observed for ICW Sites 7 and 11, this laboratory-scale study provides valuable warning signs regarding the loss of contaminant removal for ICW systems that have been in operation for a relatively long time.
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Acknowledgments
We wish to acknowledge the technical support and assistance by Ms. Susan Cook (Waterford County Council), Mrs. Tanya Peshkur (The University of Edinburgh), Mr. Shane Doolin (The University of Edinburgh), Mr. Gerard Noone (The University of Edinburgh), and Ms. Morgane Biehler (Ecole de Biologie Industrielle, France). Funding for Mr. Yu Dong’s Ph.D. study was provided by The University of Edinburgh and the China Scholarship Council (CSC). Mr. Andy Hollis proof-read this paper.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 138 • Issue 10 • October 2012
Pages: 1009 - 1017
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jul 27, 2011
Accepted: Mar 23, 2012
Published online: Mar 26, 2012
Published in print: Oct 1, 2012
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