A sorbent-based approach to managing pollutants in urban stormwater runoff
Narges Esfandiar, Rominder Suri, Erica R. McKenzie
Department of Civil and Environmental Engineering,
Temple University, Philadelphia
Urban storm water runoff can contain potentially harmful contaminants including nutrients, metals, and polycyclic aromatic hydrocarbons (PAHs). Each of these pollutants are found in urban stormwater runoff and has the potential to detrimentally impact ecosystem and/or human health. Under the green stormwater infrastructure stormwater management approach, infiltration-based stormwater management practices are increasingly being employed. However, to mitigate the potential negative effects of these pollutants, incorporating sorbents into the SMP media is sometimes considered as a means of promoting pollutant retention. Laboratory testing undertaken in this project simultaneously evaluates the removal of nutrients, metals, and PAHs, recognizing that the chemistries of these pollutants vary widely. Five sorbents were selected for evaluation, with emphasis toward commercially available materials and particularly those that are providing reusing opportunities for a waste-stream – biochar, iron amended biochar, scrap tire, coconut coir, and iron chips. The laboratory batch studies evaluated sorption kinetics and equilibrium capacity. Discussion of the results from this study will highlight strengths and limitations of each sorbent, appropriate selection of sorbent, and on-going testing.
SPEAKER BIO: Erica R. McKenzie
Erica McKenzie was originally attracted to environmental engineering to better understand human impacted natural environments. In the course of her studies, she earned degrees at University of California at Davis and Colorado State University, she completed NSF summer Research Experience for Undergraduate (REU) experiences at University of Notre Dame and the Center for Biofilm Engineering at Montana State University, and she conducted research as a postdoctoral scholar at Colorado School of Mines and the Western Cooling Efficiency Center at UC Davis. Dr. McKenzie joined the Civil and Environmental Engineering Department at Temple University in January 2015. At Temple University, her group conducts experimental research on chemical contaminant fate and transport, particularly focusing on stormwater (many pollutants) and poly/perfluoroalkyl substances (many systems).
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