Heavy metal fates in laboratory bioretention systems

Sun, Xueli; Davis, Allen P.

doi:10.1016/j.chemosphere.2006.08.013

Cited by 142 publications

(61 citation statements)

References 24 publications

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“…In summary, the inflow heavy metal concentration had a relatively minor (not significant) influence on the removal efficiency of the four bioretention media mixes in study. Similar results were reported from other studies on bioretention media mixes [20,24]. …”

Section: Influent Heavy Metal Concentrationsupporting

confidence: 81%

“…These include mechanical filtration, sedimentation, adsorption, and plant and microbial uptake [22]. Laboratory studies have shown that bioretention technology can effectively remove particulate and dissolved heavy metals from urban stormwater runoff and more than 80% of the heavy metals retained in bioretention systems [23][24][25]. Li and Davis [26] showed that the vast majority of heavy metals from urban stormwater runoff were intercepted on the surface layer of the bioretention system.…”

Section: Sourcesmentioning

confidence: 99%

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Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Wang

Zhao

Yang

et al. 2017

Water

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Heavy metals from urban stormwater runoff are important sources of surface water pollutants. Sand, zeolite, sandy loam, and quartz-sand were separately mixed with lignin to form four bioretention media mixes for experimental study using synthetic stormwater runoff. The average removal efficiencies of four heavy metals (Cu, Zn, Cd, and Pb) by the four media mixes were all better than 97% at the optimum pH of 6.05 (ranging from 6 to 8) and the seven-day rainfall-event interval. The influence of the influent concentration and the rainfall-event interval on the removal efficiency of heavy metals by the four media mixes was not significant, but the variation of the removal efficiencies at the four-day rainfall-event interval was large. Under acidic conditions, there was a certain heavy metal dissolution in the four reactors, but the effect on the removal efficiency was minor. Heavy metals were present in the media mainly in the form of the residual fraction (>50%). The accumulation of Cu, Zn, and Cd in the surface planting-soil layer (same humus and sandy-loam mixture for all reactors) was significantly larger than the accumulation at deeper depths but not for Pb. Overall, the heavy metal removal efficiencies by the four media mixes were not significantly different, and the choice of the planting-soil layer can become the control factor of heavy metal removal.

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Section: Influent Heavy Metal Concentrationsupporting

confidence: 81%

Section: Sourcesmentioning

confidence: 99%

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Wang

Zhao

Yang

et al. 2017

Water

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“…For this reason, the study followed the direction of a number of published studies in omitting SS from their versions of synthetic stormwater [25,[27][28][29][30].…”

Section: Synthetic Stormwatermentioning

confidence: 99%

“…The concentration of each pollutant in the synthetic stormwater was based on the median value that was reported for laboratory simulations elsewhere, averaged with the median value for six grab samples for first flush events at Sydney sites where field units were to be constructed [25][26][27][28][29][30]. It is important to note, that on this basis, synthetic stormwater formulation would vary for each City catchment and that some standardization is ultimately needed [31].…”

Section: Synthetic Stormwatermentioning

confidence: 99%

Pollution Removal Performance of Laboratory Simulations of Sydney’s Street Stormwater Biofilters

Macnamara

Derry

2017

Water

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Abstract:The City of Sydney is constructing more than 21,000 square metres of street biofilter units (raingardens) in terms of their Decentralised Water Master Plan (DWMP), for improving the quality of stormwater runoff to Port Jackson, the Cooks River, and the historical Botany Bay. Recharge of the Botany Sand Beds aquifer, currently undergoing remediation by extraction of industrial chlorinated hydrocarbon pollutants, is also envisaged. To anticipate the pollution removal efficiency of field biofilter designs, laboratory soil-column simulations were developed by Western Sydney University partnered with the City. Synthetic stormwater containing stoichiometric amounts of high-solubility pollutant salts in deionised water was passed through 104 mm columns that were layered to simulate monophasic and biphasic field designs. Both designs met the City's improvement targets for total nitrogen (TN) and total phosphorus (TP), with >65% median removal efficiency. Prolonged release of total suspended solids (SS) on startup emphasised the need for specifications and testing of proprietary fills. Median removal efficiency for selected heavy metal ecotoxicants was >75%. The researchers suggested that Zinc be added to the targets as proxy for metals, polycyclic aromatic hydrocarbons (PAH) and oils/greases co-generated during road use. Simulation results suggested that field units will play an important role in meeting regional stormwater improvement targets.

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“…Nonpoint source pollution from stormwater runoff contributes pollutants altering the water quality in receiving water (Pitt et al, 2004). NPS pollution originates from soil erosion, accumulation and atmospheric dust, street dirt, fertilizers and pesticides wash-off (Sun and Davis, 2006). NPS pollution includes constituents such as particulates, organics, nutrients and heavy metals were being carried by sediments from these areas.…”

mentioning

confidence: 99%

Transport of nonpoint source pollutants and stormwater runoff in a hybrid rain garden system

Flores¹,

Maniquiz-Redillas²,

Geronimo³

et al. 2016

Journal of Wetlands Research

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Heavy metal fates in laboratory bioretention systems

Cited by 142 publications

References 24 publications

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Pollution Removal Performance of Laboratory Simulations of Sydney’s Street Stormwater Biofilters

Transport of nonpoint source pollutants and stormwater runoff in a hybrid rain garden system

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