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Article

Adsorption of Metals to Particles in Urban Stormwater Runoff—Does Size Really Matter?

1
Institute for Sanitary Engineering, Water Quality and Solid Waste Management, University of Stuttgart, Bandtäle 2, 70569 Stuttgart, Germany
2
Institute of Urban Water Management, Department of Civil Engineering, Technical University of Kaiserslautern, 67663 Kaiserslautern, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Brigitte Helmreich
Water 2021, 13(3), 309; https://doi.org/10.3390/w13030309
Received: 15 December 2020 / Revised: 20 January 2021 / Accepted: 21 January 2021 / Published: 27 January 2021
(This article belongs to the Special Issue Rainwater Management in Urban Areas)
The parameter total suspended solids (TSS) is often used to evaluate the need for stormwater treatment or to assess the effectiveness of treatment measures. The purpose of this study is to analyze the value and the limitations of this approach using metals as an example. They are of major concern due to their accumulating effects in the environment. Data of a monitoring campaign at a stormwater treatment facility is evaluated. TSS, organic matter and the associated metals (Cr, Cu, Zn, Cd, and Pb) were analyzed in four different particle size fractions (<63 µm, 63–125 µm, 125–250 µm, and 250–2000 µm). While the highest event meant concentrations for all metals were found in the smallest fraction, a rather uniform particulate bound metal concentration (mass of metal per mass of particulate matter) over the first three particle size fractions was detected. Total metal loads correlated well with TSS even better with TSS < 63 µm. However, the removal efficiency in terms of the reduction of the total metal load was not reflected sufficiently by the TSS or TSS < 63 µm removal efficiency. View Full-Text
Keywords: metals; particle size distribution; partitioning; urban stormwater quality; total suspended solids metals; particle size distribution; partitioning; urban stormwater quality; total suspended solids
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MDPI and ACS Style

Baum, P.; Kuch, B.; Dittmer, U. Adsorption of Metals to Particles in Urban Stormwater Runoff—Does Size Really Matter? Water 2021, 13, 309. https://doi.org/10.3390/w13030309

AMA Style

Baum P, Kuch B, Dittmer U. Adsorption of Metals to Particles in Urban Stormwater Runoff—Does Size Really Matter? Water. 2021; 13(3):309. https://doi.org/10.3390/w13030309

Chicago/Turabian Style

Baum, Philipp, Bertram Kuch, and Ulrich Dittmer. 2021. "Adsorption of Metals to Particles in Urban Stormwater Runoff—Does Size Really Matter?" Water 13, no. 3: 309. https://doi.org/10.3390/w13030309

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