Environmental Risk assessment of sediments deposited in stormwater treatment facilities: trace metal fractionation and its implication for sediment management
Abstract
To gather further data about metal mobility in accumulated sediments in stormwater treatment facilities, metal mobility in sediments from sedimentation tanks, gully pot sediment traps, and sedimentation ponds was investigated using the sequential extraction procedure. This method allows distinguishing the metal speciation between ion-exchangeable, carbonate-associated, reducible, organic matter/sulfide-associated, and residual fractions. The metal fractionation reveals that, for all treatment facilities, the majority of Cd, Cu, Pb, and Zn and a significant amount of Ni were in potentially mobile forms. Cd, Pb, and Zn are, to a large extent, associated with Fe-Mn oxides while Cu is commonly present as Cu–organic matter complexes. The metals in these potentially mobile fractions may represent a potential environmental hazard, e.g., due to release during maintenance (sediment removal) when the chemical phase distribution might change.
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Relatively large amounts of metals may be present in potentially available fractions in analogous materials from other stormwater treatment facilities, e.g. pond sediments.
“Relatively large amounts of metals may be present in potentially available fractions in analogous materials from other stormwater treatment facilities, e.g. pond sediments (Karlsson et al., 2016).”
From Dissolved metal adsorption capacities and fractionation in filter materials for use in stormwater bioretention facilities (2019) · cites this paper as Karlsson et al., 2016
The high percentages of potentially leachable fractions imply an obvious risk of adsorbed metals being desorbed by changes in the ionic composition of ambient water or development of oxidizing conditions, for instance during extended dry periods and/or after maintenance.
“The high percentages of potentially leachable fractions imply an obvious risk of adsorbed metals being desorbed by changes in the ionic composition of ambient water or development of oxidizing conditions (Tessier et al., 1979), for instance during extended dry periods (which have been shown to affect metal removal in bioretention; Blecken et al., 2009) and/or after maintenance (Karlsson et al., 20”
From Dissolved metal adsorption capacities and fractionation in filter materials for use in stormwater bioretention facilities (2019) · cites this paper as Karlsson et al., 2016
Previous studies have found that percentages of most metals in exchangeable fractions of stormwater sediments (pond sediments, gully pot sediments, road dust etc.) are low or non-detectable.
“Previous studies have found that percentages of most metals in exchangeable fractions of stormwater sediments (pond sediments, gully pot sediments, road dust etc.) are low or non-detectable (Marsalek and Marsalek, 1997; Karlsson et al., 2016; Jayarathne et al., 2017).”
From Dissolved metal adsorption capacities and fractionation in filter materials for use in stormwater bioretention facilities (2019) · cites this paper as Karlsson et al., 2016
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References 29 · Cited by 12
- Authors
- Karlsson, K., Blecken, G.-T., Öhlander, B., & Viklander, M.
- Affiliations
- Luleå University of Technology (SE)
- Corresponding author
- Blecken, Godecke-Tobias
- Venue
- Journal of Environmental Engineering
- Published
- 2016-11
- Volume
- 142
- Issue
- 11
- ISSN
- 0733-9372 (ISSN-L)
- 1943-7870
- OpenAlex
- W2411578204
- Cited by
- 12
- References
- 29
- Citations by year
- 2026: 1 · 2025: 2 · 2023: 2 · 2022: 1 · 2019: 2 · 2018: 2 · 2017: 2
- FWCI
- 1.09
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Environmental Engineering (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Physical Sciences › Environmental Science › Environmental Engineering › Urban Stormwater Management Solutions
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Keywords
- stormwater treatment facilities, sediment metal contamination, metal mobility, sequential extraction, sediment management, sediment removal, iron and manganese oxides, cadmium, lead, zinc, copper, nickel, sedimentation tank, sedimentation ponds
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