Influence of key design and operating variables on synamics of pollutant removal in experimental stormwater constructed wetlands

Lucas, R. and Babatunde, A. O. 2017. Influence of key design and operating variables on synamics of pollutant removal in experimental stormwater constructed wetlands. Journal of Environmental Engineering 143 (7) , 04017015. 10.1061/(ASCE)EE.1943-7870.0001181

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Abstract

This study investigates the significance of key design and operating variables on the dynamics of pollutant removal in laboratory-scale stormwater constructed wetland systems. Results show that total suspended solids were effectively removed irrespective of design and operating conditions, with reductions generally in excess of 85%. However, nutrient reduction was variable, and it was influenced by the wet and dry periods (for nitrogen) and primary media used (for phosphorus). Chromium and nickel were effectively removed irrespective of the design and operating conditions. Comparable performances were also achieved for copper, cadmium, lead, and iron. Results further indicate that for most metals, the choice of wetland-to-watershed area ratio did not appear to have a significant effect on their removal except for iron. Overall, the most-effective configuration was determined to be the system that had blast-furnace slag as the primary media, and which receives regular inflow (wet conditions). Final recommendations for configuring such systems based on the findings of this study are included. These findings will further contribute to a greater understanding of the treatment performance of stormwater constructed wetlands systems.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	American Society of Civil Engineers
ISSN:	0733-9372
Date of Acceptance:	6 September 2016
Last Modified:	11 Mar 2019 11:00
URI:	https://orca.cardiff.ac.uk/id/eprint/120482

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