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

Søberg, Laila C.; Winston, Ryan J.; Viklander, Maria; Blecken, Godecke-Tobias

doi:10.1016/j.wroa.2019.100032

Cited by 33 publications

(17 citation statements)

References 27 publications

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“…Bioretention system, also known as rain garden, biofiltration or biofilter, is a typical low impact development (LID) facility to purify runoff through the combined action of plants, soil media and microorganisms [1,2]. It has been proved to be effective for the removal of most pollutants in runoff, such as heavy metals [3,4], suspended sediment [5][6][7], grease [8], pathogenic bacteria [9,10], etc. However, many previous studies indicated that bioretention systems have a low and unstable nitrogen removal rate [11,12], especially of NO 3 − .…”

Section: Introductionmentioning

confidence: 99%

Importance of the Submerged Zone during Dry Periods to Nitrogen Removal in a Bioretention System

Qin

Wang

et al. 2020

Water

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Adding a submerged zone (SZ) is deemed to promote denitrification during dry periods and thus improve NO3− removal efficiency of a bioretention system. However, few studies had investigated the variation of nitrogen concentration in the SZ during dry periods and evaluated the effect of the variation on nitrogen removal of the bioretention system. Based on the experiment in a mesocosm bioretetion system with SZ, this study investigated the variation of nitrogen concentration of the system under 17 consecutive cycles of wet and dry alternation with varied rainfall amount, influent nitrogen concentration and antecedent dry periods (ADP). The results indicated that (1) during the dry periods, NH4+ concentrations in SZ showed an exponential decline trend, decreasing by 50% in 12.9 ± 7.3 h; while NO3− concentrations showed an inverse S-shape declining trend, decreasing by 50% in 18.8 ± 6.4 h; (2) during the wet periods, NO3− concentration in the effluent showed an S-shape upward trend; and at the early stage of the wet periods, the concentration was relatively low and significantly correlated with ADP, while the corresponding volume of the effluent was significantly correlated with the SZ depth; (3) in the whole experiment, the contribution of nitrogen decrease in SZ during dry periods to NH4+ and NO3− removal accounted for 12% and 92%, respectively; and the decrease of NO3− in SZ during the dry period was correlated with the influent concentration in the wet period and the length of the dry period.

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Section: Introductionmentioning

confidence: 99%

Importance of the Submerged Zone during Dry Periods to Nitrogen Removal in a Bioretention System

Qin

Wang

et al. 2020

Water

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“…When media with greater organic matter content was compacted, flow rates were significantly decreased. The adsorption of dissolved metals in stormwater by ten commonly used filter materials was tested by Søberg, Winston, Viklander, and Blecken (2019) by adopting a laboratory batch and kinetic adsorption methodology with both single‐ and multimetal solutions. Filter materials comprised mixtures in various combinations of the following materials: sand, biochar, compost, pumice stone, chalk, clay, and silt.…”

Section: Bioretentionmentioning

confidence: 99%

Urban stormwater characterization, control, and treatment

Rodak

Jayakaran

Moore

et al. 2020

Water Environment Research

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This review summarizes over 280 studies published in 2019 related to the characterization, control, and management of urban stormwater runoff. A summary of quantity and quality concerns is provided in the first section of the review, serving as the foundation for the following sections which focus on the control and treatment of stormwater runoff. Finally, the impact of stormwater control devices at the watershed scale is discussed. Each section provides a self-contained overview of the 2019 literature, common themes, and future work. Several themes emerged from the 2019 literature including exploration of substrate amendments for improved water quality effluent from stormwater controls, the continued study of the role of vegetation in green infrastructure practices, and a call to action for the development of new models which generate reliable, computationally efficient results under the physical, chemical, biological, and social complexity of stormwater management. © 2020 Water Environment Federation • Practitioner points • Over 280 studies were published in 2019 related to the characterization, control, and treatment of urban stormwater. • Studies on bioretention and general stormwater characteristics represented the two most common subtopics in 2019. • Trends in 2019 included novel substrate amendments, studies on the role of vegetation, and advancements in computational models.

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Section: Introductionmentioning

confidence: 99%

Importance of the Submerged Zone during Dry Periods to Nitrogen Removal in a Bioretention System

He¹,

Qin²,

Wang³

et al. 2020

Preprint

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Adding a submerged zone (SZ) is deemed to promote denitrification during dry periods and thus improve NO3--N removal efficiency of a bioretention system. However, few studies had investigated the variation of nitrogen concentration in the SZ during dry periods and evaluated the effect of the variation on nitrogen removal of the bioretention system. Based on the experiment in a mesocosm bioretetion system with SZ, this study investigated the variation of nitrogen concentration of the system under 17 consecutive cycles of wet and dry alternation with varied rainfall amount, influent nitrogen concentration and antecedent dry periods (ADP). The results indicated that (1) during the dry periods, NH4+-N concentrations in SZ showed an exponential decline trend, decreasing by 50% in 12.9 ± 7.3 hours; while NO3--N concentrations showed an inverse S-shape decline trend, decreasing by 50% in 18.8 ± 6.4 hours; (2) during the wet periods, NO3--N concentration in the effluent showed an S-shape upward trend; and at the early stage of the wet periods, the concentration was relatively low and significantly correlated with ADP, while the corresponding volume of the effluent was significantly correlated with the SZ depth; (3) in the whole experiment, the contribution of nitrogen decrease in SZ during dry periods to NH4+-N and NO3--N removal accounted for 12% and 92%, respectively; and the decrease of NO3--N in SZ during the dry period was correlated with the influent concentration in the wet period and the length of the dry period.

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

Cited by 33 publications

References 27 publications

Importance of the Submerged Zone during Dry Periods to Nitrogen Removal in a Bioretention System

Importance of the Submerged Zone during Dry Periods to Nitrogen Removal in a Bioretention System

Urban stormwater characterization, control, and treatment

Importance of the Submerged Zone during Dry Periods to Nitrogen Removal in a Bioretention System

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