Identification of the microbes mediating Fe reduction in a deep saline aquifer and their influence during managed aquifer recharge

Ko, Myoung-Soo; Cho, Kyungjin; Jeong, Dawoon; Lee, Seunghak

doi:10.1016/j.scitotenv.2015.12.106

Cited by 20 publications

(11 citation statements)

References 27 publications

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“…There are several possible reasons for the low amount of iron‐ and manganese‐reducing bacteria in high‐Fe groundwater. First, iron‐ and manganese‐reducing bacteria cannot survive in groundwater with high ion levels (Ko, Cho, Jeong, & Lee, ). Second, the high Fe 2+ concentration as a resultant, or the limited availability of Fe(III) as an electron acceptor, inhibits the reproduction of iron‐ and manganese‐reducing bacteria.…”

Section: Discussionmentioning

confidence: 99%

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Relationships between microbial communities and groundwater chemistry in two pristine confined groundwater aquifers in central China

Liu

Tong

et al. 2019

Hydrological Processes

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This study explores linkages between the microbial composition and hydrochemical variables of pristine groundwater to identify active redox conditions and processes. Two confined aquifers underlying the city of Qianjiang in the Jianghan Plain in China were selected for this study, having different recharge sources and strong hydrochemical gradients. Typical methods for establishing redox processes according to threshold concentration criteria for geochemical parameters suggest iron or sulphate reduction processes. High‐throughput 16S rRNA sequencing was used to obtain diversity and taxonomic information on microbial communities. Instead of revealing iron‐ and sulphate‐reducing bacteria, salt‐ and alkali‐tolerant bacteria, such as the phylum Firmicutes and the class Gammaproteobacteria, and in particular, the family Bacillaceae, were dominant in the downstream groundwater of the first aquifer that had high ion concentrations caused by the dissolution of calcite and dolomite; meanwhile, the heterotrophic microaerophilic families Comamonadaceae and Rhodocyclaceae prevailed in the upstream groundwater of the first aquifer. Sulphate‐reducing bacteria were extremely abundant in the upstream groundwater of the second aquifer, as the SO42− concentration was especially high. Methanogens and methanotrophs were predominant in the downstream groundwater of the second aquifer even though the concentration of SO42− was much higher than 0.5 mg L−1. The microbial communities, together with the geochemical parameters, indicated that the upstream region of the first aquifer was suboxic, that Fe(III) and Mn(IV) reductions were not the main redox processes in the downstream groundwater of the first aquifer with high Fe and Mn concentrations, and that the redox processes in the upstream and downstream regions of the second confined aquifer were SO42− reduction and methanogenesis, respectively. This study expands understanding of the linkages between microbial communities and hydrogeochemistry in pristine groundwaters and provides more evidence for identifying active redox conditions and processes.

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Section: Discussionmentioning

confidence: 99%

“…There are several possible reasons for the low amount of iron-and manganese-reducing bacteria in high-Fe groundwater. First, iron-and manganese-reducing bacteria cannot survive in groundwater with high ion levels (Ko, Cho, Jeong, & Lee, 2016). Second, the high Fe 2+…”

Section: Figurementioning

confidence: 99%

Relationships between microbial communities and groundwater chemistry in two pristine confined groundwater aquifers in central China

Liu

Tong

et al. 2019

Hydrological Processes

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“…S1(a)). The study site has a geological profile of top soil (0-0.8 m), sand layer (0.8-9.6 m), and silty clay layer (9.6-25.8 m), with the groundwater level located at 1.5 m below the ground surface (Ko et al, 2016;Lee et al, 2020). The extraction well is installed 15.2 m away from the riverside and is screened from 8.0 to 9.0 m below the ground surface (Fig.…”

Section: Study Site and Sample Collectionmentioning

confidence: 99%

Identification of iron and sulfate release processes during riverbank filtration using chemical mass balance modeling

Kang

Stuyfzand

et al. 2021

Environ Geochem Health

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“…As the activity of indigenous microbes are relied upon in MAR systems to ameliorate the quality of recharging source waters, for example, by removing viral pathogens [77], mediating redox reactions affecting metal(loid) mobility [122,123], and affecting the fate of TOrCs [97,124], there is growing interest in quantifying the composition, diversity and change of microbial communities. At two pilot MAR sites in Perth and Adelaide, Reed et al [125] evaluated changes in the sulphate reducing bacterial populations in relation to nutrient inputs in the source water by characterising sulphate-reducing enrichment cultures using denaturing gradient gel electrophoresis of polymerase chain reaction amplified 16S rRNA genes.…”

Section: Changes To Subsurface Microbial Ecologymentioning

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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Identification of the microbes mediating Fe reduction in a deep saline aquifer and their influence during managed aquifer recharge

Cited by 20 publications

References 27 publications

Relationships between microbial communities and groundwater chemistry in two pristine confined groundwater aquifers in central China

Relationships between microbial communities and groundwater chemistry in two pristine confined groundwater aquifers in central China

Identification of iron and sulfate release processes during riverbank filtration using chemical mass balance modeling

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

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