Remediation of TNT and RDX in Groundwater Using Zero-Valent Iron Permeable Reactive Barriers

Johnson, R.L.; Tratnyek, Paul G.

doi:10.21236/ada495518

Cited by 2 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This in situ remediation technique involves the interception of groundwater flow to remove contaminants by physical, chemical or biological processes. Several constructed PRBs filled with zero-valent iron (ZVI) have been used to treat groundwater contaminated with chlorinated volatile organic compounds (O'Hannesin and Gillham, 1998;Phillips et al, 2010;Wilkin et al, 2014;Audí-Miró et al, 2015), chromium (VI) (Flury et al, 2009;Wilkin et al, 2014), sulfates (Da-Silva et al, 2007), pesticides (Yang et al, 2010), explosives (Da-Silva et al, 2007;Johnson and Tratnyek, 2008) or radionuclides, such as uranium (Gu et al, 2002a;Morrison et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Isotopic evidence of nitrate degradation by a zero-valent iron permeable reactive barrier: Batch experiments and a field scale study

Grau-Martínez

Torrentó

Carrey

et al. 2019

Journal of Hydrology

View full text Add to dashboard Cite

Permeable reactive barriers (PRBs) filled with zero-valent iron (ZVI) are a well-known remediation approach to treat groundwater plumes of chlorinated volatile organic compounds as well as other contaminants. In field implementations of ZVI-PRBs designed to treat these contaminants, nitrate consumption has been reported and has been attributed to direct abiotic nitrate reduction by ZVI or to denitrification by autochthonous microorganisms using the dissolved hydrogen produced from ZVI corrosion. Isotope tools have proven to be useful for monitoring the performance of nitrate remediation actions. In this study, we evaluate the use of isotope tools to assess the effect of ZVI-PRBs on the nitrate fate for the further optimization of full-scale applications. Laboratory batch experiments were performed using granular cast ZVI and synthetic nitrate solutions at pH 4-5.5 or nitrate-containing groundwater (pH=7.0) from a field site where a ZVI-PRB was installed. The experimental results revealed nitrate attenuation and ammonium production for both types of experiments. In the field site, the chemical and isotopic data demonstrated the occurrence of ZVIinduced abiotic nitrate reduction and denitrification in wells located close to the ZVI-PRB. The isotopic characterization of the laboratory experiments allowed us to monitor the efficiency of the ZVI-PRB at removing nitrate. The results show the limited effect of the barrier (nitrate reduction of less than 15-20%), probably related to its non-optimal design. Isotope tools were therefore proven to be useful tools for determining the efficacy of nitrate removal by ZVI-PRBs at the field scale.

show abstract

Section: Introductionmentioning

confidence: 99%

Isotopic evidence of nitrate degradation by a zero-valent iron permeable reactive barrier: Batch experiments and a field scale study

Grau-Martínez

Torrentó

Carrey

et al. 2019

Journal of Hydrology

View full text Add to dashboard Cite

show abstract

“…In the case of a PRB, the reducing agent is placed within the permeable reactive barrier constructed vertically across the flow of contaminated groundwater. PRB technology using zero-valent iron (ZVI) was applied at a demonstration scale at the Cornhusker Army Ammunition Plant site in Grand Island, Nebraska, USA [37]. In this area, the groundwater level was relatively close to the surface, ranging from 4.5 to 6.0 m, which is a prerequisite for the application of this technology.…”

Section: Use Of Zvi In Permeable Reactive Barriers (Prbs)mentioning

confidence: 99%

A Comprehensive Review of Remediation Strategies for Soil and Groundwater Contaminated with Explosives

Mystrioti,

Papassiopi

2024

Sustainability

View full text Add to dashboard Cite

This study offers an updated overview of the soil and water remediation strategies employed to address the widespread environmental and public health risks associated with explosive compounds, particularly TNT and RDX. Recognizing soil contamination originating from military activities, industrial accidents, and historical land use, this review delves into physical, chemical, and biological approaches to mitigating ecological and human health concerns. While physical methods like excavation and disposal are effective, their applicability is constrained by cost and logistical challenges for large contaminated areas. Chemical methods, such as oxidation and reduction, focus on transforming explosives into less toxic byproducts. Biological remediation utilizing plants and microorganisms emerges as a cost-effective and sustainable alternative. This review highlights challenges, including the persistence of explosive compounds, potential groundwater leaching, and the necessity for long-term monitoring. Emphasizing the need for site-specific strategies, considering the contaminant type, concentration, soil properties, and regulatory requirements, this study advocates for integrated and sustainable remediation approaches in pilot-scale applications. It concludes by evaluating the appropriate solution based on the advantages and disadvantages of the categories of soil and groundwater remediation methods. The duration, the effectiveness, and the cost of available technologies were estimated.

show abstract

Remediation of TNT and RDX in Groundwater Using Zero-Valent Iron Permeable Reactive Barriers

Cited by 2 publications

References 9 publications

Isotopic evidence of nitrate degradation by a zero-valent iron permeable reactive barrier: Batch experiments and a field scale study

Isotopic evidence of nitrate degradation by a zero-valent iron permeable reactive barrier: Batch experiments and a field scale study

A Comprehensive Review of Remediation Strategies for Soil and Groundwater Contaminated with Explosives

Contact Info

Product

Resources

About