Degradation Kinetics of Perchlorate in Sediments and Soils

Tan, Kai; Anderson, Todd A.; Jackson, W. Andrew

doi:10.1023/b:wate.0000009904.23410.89

Cited by 54 publications

(43 citation statements)

References 24 publications

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“…In contrast, Tan et al (29) observed a longer lag period in soil samples from an ammunition plant, where solid-propellant rocket motors were manufactured, after adding 0.81 mM NO 3 Ϫ (the cumulative concentration was 1.22 mM) ( Table 2). Although differences between experimental designs may explain the observed differences, another possible explanation is that the ammunition soil contained a large perchlorate-reducing population enriched by prior perchlorate exposure (concentration not shown) (29) and that nitrate addition did not further increase the population density.…”

Section: Vol 71 2005 Microbial Reduction Of Perchlorate and Nitratementioning

confidence: 93%

“…Nevertheless, relatively little is known about perchlorate degradation in vadose soil. The potential for perchlorate reduction has been shown in soils with or without prior perchlorate exposure by saturated soil microcosm studies and most probable number enumeration (12,29,32,38). Microorganisms involved in perchlorate reduction in vadose soil, however, have not been identified.…”

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confidence: 99%

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Reduction of Perchlorate and Nitrate by Microbial Communities in Vadose Soil

Nozawa-Inoue

Scow

Rolston

2005

Appl Environ Microbiol

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Perchlorate contamination is a concern because of the increasing frequency of its detection in soils and groundwater and its presumed inhibitory effect on human thyroid hormone production. Although significant perchlorate contamination occurs in the vadose (unsaturated) zone, little is known about perchlorate biodegradation potential by indigenous microorganisms in these soils. We measured the effects of electron donor (acetate and hydrogen) and nitrate addition on perchlorate reduction rates and microbial community composition in microcosm incubations of vadose soil. Acetate and hydrogen addition enhanced perchlorate reduction, and a longer lag period was observed for hydrogen (41 days) than for acetate (14 days). Initially, nitrate suppressed perchlorate reduction, but once perchlorate started to be degraded, the process was stimulated by nitrate. Changes in the bacterial community composition were observed in microcosms enriched with perchlorate and either acetate or hydrogen. Denaturing gradient gel electrophoresis analysis and partial sequencing of 16S rRNA genes recovered from these microcosms indicated that formerly reported perchloratereducing bacteria were present in the soil and that microbial community compositions were different between acetate-and hydrogen-amended microcosms. These results indicate that there is potential for perchlorate bioremediation by native microbial communities in vadose soil.

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Section: Vol 71 2005 Microbial Reduction Of Perchlorate and Nitratementioning

confidence: 93%

mentioning

confidence: 99%

Reduction of Perchlorate and Nitrate by Microbial Communities in Vadose Soil

Nozawa-Inoue

Scow

Rolston

2005

Appl Environ Microbiol

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“…Perchlorate-reducing organisms can use a variety of organic carbon substrates as electron donors, such as glucose, acetate, vegetable oils, and natural organic carbon compounds present in soils and sediments (6,8,14,15). Biological transformation of perchlorate has been successfully utilized for drinking water treatment (16)(17) and for in situ groundwater remediation (18)(19)(20)(21).…”

Section: Introductionmentioning

confidence: 99%

Perchlorate Behavior in a Municipal Lake Following Fireworks Displays

Wilkin

Fine

Burnett

2007

Environ. Sci. Technol.

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After the fireworks displays, perchlorate concentrations decreased toward the background level within 20 to 80 days, with the rate of attenuation correlating to surface water temperature. Adsorption tests indicate that sediments underlying the water column have limited (<100 nmol/g) capacity to remove perchlorate via chemical adsorption. Microcosms showed comparatively rapid intrinsic perchlorate degradation in the absence of nitrate consistent with the observed disappearance of perchlorate from the study site. This suggests that at sites with appropriate biogeochemical conditions, natural attenuation may be an important factor affecting the fate of perchlorate following fireworks displays.

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“…Whereas sulfate concentration greater than 20 mg/L may cause competitive exclusion of anaerobic dehalorespiration of chlorinated solvents, the same is not true for perchlorate. In microcosms treated with 300 mg/L sulfate, there was no obvious effect on perchlorate biodegradation rates or lag time (Tan et al, 2004a).…”

Section: Sulfatementioning

confidence: 99%

“…However, in some studies, inhibitory effects of nitrate were not observed . Tan et al (2004a) tested microcosms to evaluate degradation kinetics of perchlorate in sediment and soils. They showed that perchlorate degradation was affected by organic substrate availability but not the concentration of nitrate.…”

Section: Nitratementioning

confidence: 99%

Natural Attenuation of Perchlorate in Groundwater: Processes, Tools and Monitoring Techniques

Lieberman¹,

Borden²

2008

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Degradation Kinetics of Perchlorate in Sediments and Soils

Cited by 54 publications

References 24 publications

Reduction of Perchlorate and Nitrate by Microbial Communities in Vadose Soil

Reduction of Perchlorate and Nitrate by Microbial Communities in Vadose Soil

Perchlorate Behavior in a Municipal Lake Following Fireworks Displays

Natural Attenuation of Perchlorate in Groundwater: Processes, Tools and Monitoring Techniques

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