Probabilistic Approach to Evaluation of Metal(loid) Fate During Stormwater Aquifer Storage and Recovery

Vanderzalm, Joanne; Page, Declan; Barry, Karen; Scheiderich, Kathleen; Gonzalez, Dennis; Dillon, Peter J.

doi:10.1002/clen.201500966

Cited by 8 publications

(12 citation statements)

References 26 publications

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“…The iron concentrations from production wells (PW-Sand and PW-Gravel) were higher than those of the groundwater (GMW-Sand: 14.1 ± 1.1 mg/L and GMW-Gravel: 10.3 ± 0.9 mg/L). Previous studies reported the occurrence of high iron concentrations in MAR [22,23]. The amount of manganese in the river water was 0.2 mg/L, but it was higher in the RBF filtrate samples (PW-Sand (1.5 ± 0.1 mg/L) and PW-Gravel (2.6 ± 0.8 mg/L)).…”

Section: Iron and Manganesementioning

confidence: 82%

Riverbank Filtration for the Water Supply on the Nakdong River, South Korea

Maeng

Lee

2019

Water

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A field study was carried out to investigate the feasibility of a riverbank filtration site using two vertical wells on the Nakdong River, South Korea. The riverbank filtration site was designed to have eleven horizontal collector wells in order to supply 280,000 m 3 /day. This field study provided more insight into the fate of the dissolved organic matter's characteristics during soil passage. The vertical production wells (PWs) were located in different aquifer materials (PW-Sand and PW-Gravel) in order to determine the depth of the laterals for the horizontal collector wells. The turbidity of the riverbank filtrates from the PW-Sand (0.9 NTU) and PW-Gravel (0.7 NTU) was less than 1 NTU, which was the target turbidity of the riverbank filtrate in this study. The iron concentrations were 18.1 ± 0.8 and 25.9 ± 1.3 mg/L for PW-Sand and PW-Gravel respectively, and were higher than those of the land-side groundwater. The biodegradable organic matter-determined biochemical oxygen demand in the river water was reduced by more than 40% during soil passage, indicating that less microbial growth in the riverbank filtrate could be possible. Moreover, the influence of the pumping rates of the vertical wells on the removal of dissolved organic matter and the turbidity was not significant.

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Section: Iron and Manganesementioning

confidence: 82%

Riverbank Filtration for the Water Supply on the Nakdong River, South Korea

Maeng

Lee

2019

Water

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“…[3] below) in the T2 aquifer, which is consistent with the concentration of BDOC in the present study. Iron(III) in sediments of the storage zone has been reported to be an important oxidant for reaction with TOC, and therefore the removal of BDOC is unlikely to be limited by the availability of oxidants (Vanderzalm et al, 2016). …”

Section: Resultsmentioning

confidence: 99%

“…Four stormwater harvesting and aquifer storage and recovery schemes: Parafield, Kaurna Park, Unity Park, and Paddocks. The figure shows City of Salisbury stormwater harvesting facilities, identifying the location of managed aquifer recharge (MAR) wells at the associated catchments (Vanderzalm et al 2016). …”

Section: Methodsmentioning

confidence: 99%

Nutrient Removal during Stormwater Aquifer Storage and Recovery in an Anoxic Carbonate Aquifer

et al. 2018

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Stormwater harvesting coupled to managed aquifer recharge (MAR) provides a means to use the often wasted stormwater resource while also providing protection of the natural and built environment. Aquifers can act as a treatment barrier within a multiple-barrier approach to harvest and use urban stormwater. However, it remains challenging to assess the treatment performance of a MAR scheme due to the heterogeneity of aquifers and MAR operations, which in turn influences water treatment processes. This study uses a probabilistic method to evaluate aquifer treatment performance based on the removal of total organic C (TOC), N, and P during MAR with urban stormwater in an anoxic carbonate aquifer. Total organic C, N, and P are represented as stochastic variables and described by probability density functions (PDFs) for the "injectant" and "recovery"; these injectant and recovery PDFs are used to derive a theoretical MAR removal efficiency PDF. Four long-term MAR sites targeting one of two tertiary carbonate aquifers (T1 and T2) were used to describe the nutrient removal efficiencies. Removal of TOC and total N (TN) was dominated by redox processes, with median removal of TOC between 50 and 60% at all sites and TN from 40 to 50% at three sites with no change at the fourth. Total P removal due to filtration and sorption accounted for median removal of 29 to 53%. Thus, the statistical method was able to characterize the capacity of the anoxic carbonate aquifer treatment barrier for nutrient removal, which highlights that aquifers can be an effective long-term natural treatment option for management of water quality, as well as storage of urban stormwater.

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“…As a result, the solubility and mobility of metalloids may fluctuate within an individual MAR operation [95]. Iron solubility is commonly modified by changing redox conditions in MAR [96]. Reductive iron (III) dissolution not only increases dissolved iron concentrations, but the reduction in sorption sites also leads to increases in other dissolved metalloid concentrations.…”

Section: Metal(loid) Fatementioning

confidence: 99%

“…The fate of metals and metalloids were investigated in four, large-scale, stormwater ASR systems in South Australia located in a confined, anoxic, limestone aquifer [96]. Variations in source water concentrations and aquifer conditions complicated the process of attempting to use deterministic methods to estimate environmental risk.…”

Section: Metal(loid) Fatementioning

confidence: 99%

Water Recycling via Aquifers for Sustainable Urban Water Quality Management: Current Status, Challenges and Opportunities

Bekele

Page

Vanderzalm

et al. 2018

Water

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Managed aquifer recharge (MAR) is used worldwide in urban environments to replenish groundwater to provide a secure and sustainable supply of potable and non-potable water. It relies on natural treatment processes within aquifers (i.e., filtration, sorption, and degradation), and in some cases involves infiltration through the unsaturated zone to polish the given source water, e.g., treated wastewater, stormwater, or rainwater, to the desired quality prior to reuse. Whilst MAR in its early forms has occurred for millennia, large-scale schemes to replenish groundwater with advanced treated reclaimed water have come to the fore in cities such as Perth, Western Australia, Monterey, California, and Changwon, South Korea, as water managers consider provision for projected population growth in a drying climate. An additional bonus for implementing MAR in coastal aquifers is assisting in the prevention of seawater intrusion. This review begins with the rationale for large-scale MAR schemes in an Australian urban context, reflecting on the current status; describes the unique benefits of several common MAR types; and provides examples from around the world. It then explores several scientific challenges, ranging from quantifying aquifer removal for various groundwater contaminants to assessing risks to human health and the environment, and avoiding adverse outcomes from biogeochemical changes induced by aquifer storage. Scientific developments in the areas of water quality assessments, which include molecular detection methods for microbial pathogens and high resolution analytical chemistry methods for detecting trace chemicals, give unprecedented insight into the "polishing" offered by natural treatment. This provides opportunities for setting of compliance targets for mitigating risks to human health and maintaining high performance MAR schemes.

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Probabilistic Approach to Evaluation of Metal(loid) Fate During Stormwater Aquifer Storage and Recovery

Cited by 8 publications

References 26 publications

Riverbank Filtration for the Water Supply on the Nakdong River, South Korea

Riverbank Filtration for the Water Supply on the Nakdong River, South Korea

Nutrient Removal during Stormwater Aquifer Storage and Recovery in an Anoxic Carbonate Aquifer

Water Recycling via Aquifers for Sustainable Urban Water Quality Management: Current Status, Challenges and Opportunities

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