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Facilitating maintenance of stormwater ponds: comparison of analytical methods for determination of metal pollution
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0001-7445-0870
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0003-4327-5613
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0002-4732-7348
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0001-5548-4397
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2022 (English)In: Environmental Science and Pollution Research, ISSN 0944-1344, E-ISSN 1614-7499, Vol. 29, no 49, p. 74877-74893Article in journal (Refereed) Published
Abstract [en]

Stormwater ponds are widely used for controlling runoff quality through the sedimentation of particles and associated pollutants. Their maintenance requires regular removal and disposal of accumulated material. This necessitates an assessment of material hazardousness, including potential hazard due to its contamination by metals. Here we analyze 32 stormwater pond sediment samples from 17 facilities using several chemical analysis methods (total extraction, sequential extraction, diffusive gradients in thin-films DGT, and pore water extraction) in order to consider the complementarity and comparability of the different approaches. No clear relationship was found between analyses that have the potential to measure similar metal fractions (DGT and either fraction 1 of the sequential extraction (adsorbed and exchangeable metals and carbonates) or pore water concentrations). Loss on ignition (LOI) had a significant positive correlation with an indicator of the environmental risk developed in this paper (∑ranks) that incorporates different metals, speciations, and environmental endpoints. Large variations in metal levels were observed between ponds. As clustering was limited between the different analyses, a comprehensive analysis of different parameters is still needed to fully understand metal speciation and bioavailability.

Place, publisher, year, edition, pages
Springer Nature, 2022. Vol. 29, no 49, p. 74877-74893
Keywords [en]
Solids, Metal bioavailability, Metal fractionation, Sediment quality assessment, Urban runof treatment, Stormwater management, Environmental risk assessment, Nature-based solutions
National Category
Water Engineering Environmental Sciences
Research subject
Urban Water Engineering; Centre - Centre for Stormwater Management (DRIZZLE)
Identifiers
URN: urn:nbn:se:ltu:diva-91043DOI: 10.1007/s11356-022-20694-0ISI: 000804501100010PubMedID: 35650338Scopus ID: 2-s2.0-85131330460OAI: oai:DiVA.org:ltu-91043DiVA, id: diva2:1665251
Funder
Luleå University of TechnologyVinnova, 2016–05176 DRIZZLE
Note

Validerad;2022;Nivå 2;2022-11-16 (hanlid);

Full text license: CC BY

For correction, see: Gavrić, S., Flanagan, K., Österlund, H., et al. Facilitating maintenance of stormwater ponds: comparison of analytical methods for determination of metal pollution. Environmental Science and Pollution Research (2022). https://doi.org/10.1007/s11356-022-21428-y

Available from: 2022-06-07 Created: 2022-06-07 Last updated: 2024-06-19Bibliographically approved
In thesis
1. Trace metals in swale soils and sediments from gully pots and stormwater management ponds
Open this publication in new window or tab >>Trace metals in swale soils and sediments from gully pots and stormwater management ponds
2023 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[sv]
Spårmetaller ackumulerade i dagvattenanläggningar: svackdiken, rännstensbrunnar och dagvattendammar
Abstract [en]

Three commonly used drainage system components, with considerably different characteristics and roles in stormwater management, were studied and reported on in this thesis: (i) grass swales, (ii) gully pots (GPs), and (iii) stormwater management ponds. With time, solids and associated pollutants accumulate in these components, and regular maintenance is needed to ensure that their design functions, including protection of the environment, are sustained.

Trace metals and their concentrations, loads and speciation were investigated within and among the individual types of components. The study program started with a critical review of processes enhancing the quality of stormwater passing over grass filter strips and through swales, and continued with field research of swale soils, and sediments from GPs and ponds.

The swales studied in the thesis served for stormwater drainage and storage of snow cleared from adjacent trafficked areas during winter months. Results suggest that both stormwater runoff and snow stored in the swale were transport vectors of metals originating from traffic. Other sources of metals were native soils and traction material used in winter road maintenance.

Moreover, the speciation results showed that across components, Zn and Pb were the metals with the highest share in the most mobile fraction, followed by Cu, while Ba, Cr,V, Co, and Ni were found in a higher share in the less mobile fractions.

GP and pond sediments showed similar organic matter content, whereas swales soils showed relatively low organic content, further decreasing with the soil depth. Results suggested that higher organic matter content corresponded to higher concentrations of certain metals in the case of ponds and, to some extent, swales. In the case of GPs, a positive relationship between metals and the proportion of fine particles was detected.

The highest concentrations of Cu and Zn were observed in sediments from ponds and reached 319 and 1380 mg/kg DW, respectively. The highest concentration of Pb (188mg/kg DW) was observed in swale, operating for 57 years located next to a road with the traffic intensity of 11,650 v/day.

The large variation in the accumulated dry mass of solids in GPs (2-91 kg) questions the current practice of emptying all GPs at the same regular intervals. Moreover, of the 26 GP samples, Swedish thresholds for soils with the sensitive (S) land use were exceeded for Cu in five samples and Zn in six samples. Of 32 pond samples, the S threshold was exceeded for Cu in nine samples and Zn in 12 samples; of these, three and eight of the pond samples also exceeded the less sensitive (LS) threshold. Of 96 swale samples, 25 samples exceeded the S threshold for Pb, with one sample also exceeding the LS threshold.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2023
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Water Engineering
Research subject
Urban Water Engineering; Centre - Centre for Stormwater Management (DRIZZLE)
Identifiers
urn:nbn:se:ltu:diva-101706 (URN)978-91-8048-412-1 (ISBN)978-91-8048-413-8 (ISBN)
Public defence
2023-12-14, E632, Luleå tekniska universitet, Luleå, 09:00 (English)
Opponent
Supervisors
Available from: 2023-10-18 Created: 2023-10-18 Last updated: 2024-03-25Bibliographically approved

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Gavric, SnezanaFlanagan, KelseyÖsterlund, HeleneBlecken, Godecke-TobiasViklander, Maria

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