Aqueous and Mineral Intrinsic Bioremediation Assessment: Natural Attenuation

Kennedy, Lonnie G.; Everett, John W.; Gonzales, Jim

doi:10.1061/(asce)0733-9372(2004)130:9(942)

Cited by 12 publications

(13 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it has been suggested that iron sulfide minerals could be more important than microorganisms under some conditions (e.g., sulfate reducing conditions) in affecting the fate of chlorinated ethylenes (Lee and Batchelor, 2002). Fe and S mineralogical investigations of sites where sulfate reduction is dominant suggest this may be the case (Kennedy et al, 2004b). Finally, the reactions in Eqs.…”

Section: Bird Backgroundmentioning

confidence: 99%

Field-scale demonstration of induced biogeochemical reductive dechlorination at Dover Air Force Base, Dover, Delaware

Kennedy¹,

Everett

Becvar³

et al. 2006

Journal of Contaminant Hydrology

Self Cite

View full text Add to dashboard Cite

Biogeochemical reductive dechlorination (BiRD) is a new remediation approach for chlorinated aliphatic hydrocarbons (CAHs). The approach stimulates common sulfate-reducing soil bacteria, facilitating the geochemical conversion of native iron minerals into iron sulfides. Iron sulfides have the ability to chemically reduce many common CAH compounds including PCE, TCE, DCE, similar to zero valent iron (Fe 0 ). Results of a field test at Dover Air Force Base, Dover, Delaware, are given in this paper. BiRD was stimulated by direct injection of Epson salt (MgSO 4 ·7H 2 O) and sodium (L) lactate (NaC 3 H 5 O 3 ) in five injection wells. Sediment was sampled before and 8 months after injection. Significant iron sulfide minerals developed in the sandy aquifer matrix. From ground water analyses, treatment began a few weeks after injection with up to 95% reduction in PCE, TCE, and cDCE in less than 1 year. More complete CAH treatment is likely at a larger scale than this demonstration.

show abstract

Section: Bird Backgroundmentioning

confidence: 99%

Field-scale demonstration of induced biogeochemical reductive dechlorination at Dover Air Force Base, Dover, Delaware

Kennedy¹,

Everett

Becvar³

et al. 2006

Journal of Contaminant Hydrology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Much of the color associated with sediments is provided by the presence of iron-based minerals and their oxidation state. In general there is a correlation between decreasing sediment size and increasing iron concentration (Kennedy et al, 2000). For example, the presence of oxidized iron (Fe[III]) minerals can impart the following colors to sediments (Kennedy et al, 2000 Conversely, sediments containing reduced iron such as iron sulfide minerals are typically gray to black in color.…”

Section: Field Observation Of Iron Mineralsmentioning

confidence: 99%

“…Several speciation techniques for iron and sulfur species and a protocol for their use is presented in Kennedy et al (2000). However, this protocol focuses on capacity determination for fuel hydrocarbon biodegradation; for chlorinated solvents a more detailed speciation may be needed to address the constituents important for abiotic dechlorination.…”

Section: Wet Chemistry Techniquesmentioning

confidence: 99%

“…Surface oxidation can occur within 30 minutes or less of exposure to aerobic conditions (Fanning et al, 2002). Anaerobic sampling techniques for aquifer sediments are described in Kennedy et al (1998Kennedy et al ( , 2000.…”

Section: Mineralogical Analysesmentioning

confidence: 99%

“…Figure 2.5 is a photograph of reduced and oxidized iron minerals. Because FeS and FeS 2 cannot be differentiated visually in the field a simple field test to differentiate these materials is as follows (from Kennedy et al, 2000):…”

Section: Field Observation Of Iron Mineralsmentioning

confidence: 99%

See 2 more Smart Citations

Multiple Lines Of Evidence Supporting Natural Attenuation: Lines Of Inquiry Supporting Monitored Natural Attenuation And Enhanced Attenuatin Of Chlorinated Solvents

Vangelas¹,

Widemeirer²,

Barden³

et al. 2004

View full text Add to dashboard Cite

Field methods and example applications for the Min‐Trap® mineral sampler

Divine

Justicia-Leon

Tilton

et al. 2023

Remediation Journal

View full text Add to dashboard Cite

Important reactive minerals are commonly created during in situ groundwater remediation activities; for example, iron sulfides formed during enhanced reduction approaches can abiotically degrade many chlorinated solvents. However, cost‐effective tools to evaluate these treatment processes in field applications are limited and the collection of samples to evaluate in situ mineral formation is costly due to drilling requirements. The new passive Min‐Trap sampler is a simple and cost‐effective tool that can directly measure the formation of reactive minerals in situ without the need for additional drilling or soil core collection. The methods presented here describe how Min‐Traps deployed in conventional monitoring wells can measure reactive minerals and how these minerals can be identified through commercially available analytical methods. Several examples are presented that show how Min‐Traps can be used to characterize the rate and spatial variability of reactive mineral precipitation and these data may support operation and optimization decisions.

show abstract

Aqueous and Mineral Intrinsic Bioremediation Assessment: Natural Attenuation

Cited by 12 publications

References 15 publications

Field-scale demonstration of induced biogeochemical reductive dechlorination at Dover Air Force Base, Dover, Delaware

Field-scale demonstration of induced biogeochemical reductive dechlorination at Dover Air Force Base, Dover, Delaware

Multiple Lines Of Evidence Supporting Natural Attenuation: Lines Of Inquiry Supporting Monitored Natural Attenuation And Enhanced Attenuatin Of Chlorinated Solvents

Field methods and example applications for the Min‐Trap® mineral sampler

Contact Info

Product

Resources

About