Performance of field-scale permeable reactive barriers: An overview on potentials and possible implications for in-situ groundwater remediation applications

Singh, Rahul; Chakma, Sumedha; Birke, Volker

doi:10.1016/j.scitotenv.2022.158838

Cited by 28 publications

(23 citation statements)

References 98 publications

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“…Over 200 ZVI PRBs have been installed worldwide, and some have operated for decades. 5 Due to high pH (>10) in the ZVI barrier and a primary H 2 source under natural conditions, microbial sulfate reduction is slow and FeS x minerals occur as minor pore-fillers separated by oxide and carbonate minerals from ZVI, rather than as naturally sulfidating ZVI. This study shows that organic carbon addition to ZVI/SRB columns led to increased SRB activity, and consequently sulfidation of ZVI throughout the porous media, and improvement in TCE degradation.…”

Section: ■ Environmental Implicationsmentioning

confidence: 99%

“…Over 200 ZVI PRBs have been installed worldwide, and some have operated for decades . Due to high pH (>10) in the ZVI barrier and a primary H 2 source under natural conditions, microbial sulfate reduction is slow and FeS x minerals occur as minor pore-fillers separated by oxide and carbonate minerals from ZVI, rather than as naturally sulfidating ZVI.…”

Section: Environmental Implicationsmentioning

confidence: 99%

“…Zero-valent iron (ZVI) has been extensively studied as a reactive material for groundwater remediation during the past three decades, including installation of granular ZVI as permeable reactive barrier (PRB) cross-contaminated plumes. − In recent years, sulfidation of ZVI (i.e., the process of incorporating S into ZVI or forming coupled Fe 0 –FeS x –FeO x particles , has attracted research interest following early reports of degradation of chlorinated organic compounds by iron sulfide. − ZVI sulfidation improves both reactivity and selectivity of ZVI for contaminant removal, overcoming side reactions with water, because the incorporated FeS x phase has higher electron conductivity and hydrophobicity than the original FeO x phase formed on ZVI. − …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Biogenic Sulfidation of Zero-Valent Iron in Columns: Implications for Promoting Dechlorination in Permeable Reactive Barriers

Wang,

Luo,

Pan

et al. 2023

Environ. Sci. Technol.

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Section: ■ Environmental Implicationsmentioning

confidence: 99%

Section: Environmental Implicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Biogenic Sulfidation of Zero-Valent Iron in Columns: Implications for Promoting Dechlorination in Permeable Reactive Barriers

Wang,

Luo,

Pan

et al. 2023

Environ. Sci. Technol.

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“…Table 4 lists illustrative examples of the large-scale implementation of permeable reactive barriers in remediating different contaminants [164,[167][168][169][170][171][172]. In this respect, it is clear that this technology has been successfully implemented to remediate different types of contaminants including both organic and inorganic.…”

mentioning

confidence: 99%

“…In this respect, it is clear that this technology has been successfully implemented to remediate different types of contaminants including both organic and inorganic. Only one of these examples, based in Willisau, Switzerland, claimed to require additional remediation action, as it did not achieve its target performance, and this was attributed to the complicated hydrogeological conditions at the site and the geometry of the installed barrier [164,170].…”

mentioning

confidence: 99%

Permeable Concrete Barriers to Control Water Pollution: A Review

Abdel Rahman,

El-Kamash,

Hung

2023

Water

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Permeable concrete is a class of materials that has long been tested and implemented to control water pollution. Its application in low-impact development practices has proved its efficiency in mitigating some of the impacts of urbanization on the environment, including urban heat islands, attenuation of flashfloods, and reduction of transportation-related noise. Additionally, several research efforts have been directed at the dissemination of these materials for controlling pollution via their use as permeable reactive barriers, as well as their use in the treatment of waste water and water purification. This work is focused on the potential use of these materials as permeable reactive barriers to remediate ground water and treat acid mine drainage. In this respect, advances in material selection and their proportions in the mix design of conventional and innovative permeable concrete are presented. An overview of the available characterization techniques to evaluate the rheology of the paste, hydraulic, mechanical, durability, and pollutant removal performances of the hardened material are presented and their features are summarized. An overview of permeable reactive barrier technology is provided, recent research on the application of permeable concrete technology is analyzed, and gaps and recommendations for future research directions in this field are identified. The optimization of the mix design of permeable reactive concrete barriers is recommended to be directed in a way that balances the performance measures and the durability of the barrier over its service life. As these materials are proposed to control water pollution, there is a need to ensure that this practice has minimal environmental impacts on the affected environment. This can be achieved by considering the analysis of the alkaline plume attenuation in the downstream environment.

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Materials for sustainable metallic iron-based water filters: a review

Xiao,

Hu,

Gwenzi

et al. 2024

Environ Chem Lett

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Water pollution is calling for a sustainable remediation method such as the use of metallic iron (Fe0) to reduce and filter some pollutants, yet the reactivity and hydraulic conductivity of iron filters decline over time under field conditions. Here we review iron filters with focus on metallic corrosion in porous media, flaws in designing iron filters, next-generation filters and perspectives such as safe drinking water supply, iron for anaemia control and coping with a reactive material. We argue that assumptions sustaining the design of current Fe0 filters are not valid because proposed solutions address the issues of declining iron reactivity and hydraulic conductivity separately. Alternatively, a recent approach suggest that each individual Fe0 atom corroding within a filter contributes to both reactivity and permeability loss. This approach applies well to alternative iron materials such as bimetallics, composites, hybrid aggregates, e.g. Fe0/sand, and nano-Fe0. Characterizing the intrinsic reactivity of individual Fe0 materials is a prerequisite to designing sustainable filters. Indeed, Fe0 ratio, Fe0 type, Fe0 shape, initial porosity, e.g. pore size and pore size distribution, and nature and size of admixing aggregates, e.g. pumice, pyrite and sand, are interrelated parameters which all influence the generation and accumulation of iron corrosion products. Fe0 should be characterized in long-term experiments, e.g. 12 months or longer, for Fe dissolution, H2 generation and removal of contaminants in three media, i.e., tap water, spring water and saline water, to allow reactivity comparison and designing field-scale filters.

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Performance of field-scale permeable reactive barriers: An overview on potentials and possible implications for in-situ groundwater remediation applications

Cited by 28 publications

References 98 publications

Enhanced Biogenic Sulfidation of Zero-Valent Iron in Columns: Implications for Promoting Dechlorination in Permeable Reactive Barriers

Enhanced Biogenic Sulfidation of Zero-Valent Iron in Columns: Implications for Promoting Dechlorination in Permeable Reactive Barriers

Permeable Concrete Barriers to Control Water Pollution: A Review

Materials for sustainable metallic iron-based water filters: a review

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