Environmental Risk Assessment of Sediments Deposited in Stormwater Treatment Facilities: Trace Metal Fractionation and Its Implication for Sediment Management

Karlsson, Kristin; Blecken, Godecke-Tobias; Öhlander, Björn; Viklander, Maria

doi:10.1061/(asce)ee.1943-7870.0001122

Cited by 8 publications

(11 citation statements)

References 27 publications

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“…4). 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., 2016). The latter becomes evident considering that metals primarily accumulate in the top 5 cm of bioretention filter materials (e.g.…”

Section: Resultsmentioning

confidence: 99%

“…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). However, Jayarathne et al.…”

Section: Discussionmentioning

confidence: 99%

“…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). Only one study has addressed such fractionation in bioretention systems.…”

Section: Introductionmentioning

confidence: 99%

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Dissolved metal adsorption capacities and fractionation in filter materials for use in stormwater bioretention facilities

et al. 2019

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The dissolved metal adsorption and association was determined for ten different filter materials recommended and/or implemented in bioretention facilities. Batch adsorption and batch kinetic experiments were performed at lab-scale using both single and multi-metal solutions. Metal strengths and association were determined by sequential extraction analysis. All materials adsorbed metals and 90% of adsorption occurred within 1 h. However, as metal solutions became more complex, adsorption behavior changed. Generally, filter materials classified as sand with a naturally high pH, relatively low organic matter (OM) content and large specific surface area seem to be good choices for removing dissolved metals. Additionally, a chalk additive might improve metal adsorption whereas biochar did not significantly improve metal retention and may be an unwanted (due to degradation over time) extra source of OM. Regardless of filter material, metals primarily adsorbed to the exchangeable form which indicates that metal adsorption might not be permanent, but rather substantially reversible in some cases. More research is needed to assess whether dissolved metals adsorbed in filter materials of bioretention systems pose a delayed threat instead of an immediate threat. Finally, the authors strongly recommend filter materials intended for stormwater bioretention facilities to be tested prior to implementation.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Dissolved metal adsorption capacities and fractionation in filter materials for use in stormwater bioretention facilities

et al. 2019

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“…However, the presence of heavy metals in runoff can result in accumulation of metals in these retention structures and potentially the flora which populate them. of Pb were found to be present in mobile forms which represent a greater potential for ecological harm (Karlsson et al, 2016). Two studies were published in 2016 that looked at bioaccumulation in fauna and sediments (Søberg et al, 2016;Stephansen et al, 2016).…”

Section: Constructed Stormwater Pondsmentioning

confidence: 99%

Urban Stormwater Characterization, Control, and Treatment

Moore¹,

Rodak²,

Vogel³

2017

Water Environment Research

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A summary of 246 studies published in 2016 on topics related to the characterization and management of urban stormwater runoff is presented in the following review. The review is structured along three major topical areas: (1) general characterization of stormwater quantity and quality; (2) engineered systems for stormwater control and treatment, including erosion and sediment control practices, constructed stormwater ponds and wetlands, bioretention, permeable pavement, greenroofs, and rainwater harvesting and (3) watershedscale application of stormwater treatment and control practices. Common research themes and needs highlighted throughout this review include efforts to better understand stormwater transport and treatment mechanisms and their representation in models, advancements to optimize the design of stormwater control measures to meet specific hydrologic and/or water quality targets, and increasing understanding of the biophysical and social factors that influence watershed-scale implementation of low impact development and other stormwater control measures.

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“…However, the most important characteristic of wastewater, i.e., the amount of organic matter, was not reported. It has been shown in numerous papers that the presentation of the results of laboratory analysis of the soil, sediment, or any material added to the soil is necessary because this information makes it easy to interpret the results and understandable for the reader (Mousavi et al 2017b(Mousavi et al , 2018Karlsson et al 2016). On the other hand, the biological properties of wastewater are equally important if not more so because the biological properties of wastewater significantly affect the breakdown and settling of the sediment (Wang et al 2014).…”

mentioning

confidence: 99%

Discussion of “Wastewater Effect on the Deposition of Cohesive Sediment” by Milad Khastar-Boroujeni, Kazem Esmaili, Hossein Samadi-Boroujeni, and Alinaghi Ziaei

Mousavi

Nasrabadi

2019

J. Environ. Eng.

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Environmental Risk Assessment of Sediments Deposited in Stormwater Treatment Facilities: Trace Metal Fractionation and Its Implication for Sediment Management

Cited by 8 publications

References 27 publications

Dissolved metal adsorption capacities and fractionation in filter materials for use in stormwater bioretention facilities

Dissolved metal adsorption capacities and fractionation in filter materials for use in stormwater bioretention facilities

Urban Stormwater Characterization, Control, and Treatment

Discussion of “Wastewater Effect on the Deposition of Cohesive Sediment” by Milad Khastar-Boroujeni, Kazem Esmaili, Hossein Samadi-Boroujeni, and Alinaghi Ziaei

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