Geochemical processes controlling arsenic mobility in groundwater: A case study of arsenic mobilization and natural attenuation

He, Y. Thomas; Fitzmaurice, Arthur G.; Bilgin, Azra; Choi, Sunkyung; O’Day, Peggy A.; Horst, John; Harrington, J.G.; Reisinger, H. James; Burris, David R.; Hering, Janet G.

doi:10.1016/j.apgeochem.2009.10.002

Cited by 35 publications

(24 citation statements)

References 57 publications

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“…Contrary to observations with other soils (McLean, Dupont, and Sorensen 2006;He et al 2010), neither arsenic nor any of the other metals monitored increased in concentration throughout the test (data not shown).…”

Section: Bioremediation Test: Metalscontrasting

confidence: 84%

A Long-Term Field Study of In Situ Bioremediation in a Fractured Conglomerate Trichloroethene Source Zone

Verce

Madrid

Gregory

et al. 2015

Bioremediation Journal

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An 8-year bioremediation field study was conducted in a trichloroethene (TCE)-contaminated, highly indurated (i.e., hard), rechargelimited (i.e., contains little water) conglomerate where common remediation strategies, such as groundwater recirculation and direct push installation of a large well network, could not be used. A tracer test using isotopically distinct water from the Hetch Hetchy Reservoir indicated that remediation fluids mainly flowed through fractures and sand lenses in the conglomerate. This was confirmed during in situ bioremediation of the site, in which Dehalococcoides (from a bioaugmentation culture) and volatile fatty acids (from injection of lactate) were the most accurate indicators of transport between wells. Some contaminants were also displaced out of the area due to injection of tracer water. Despite these difficulties, dissolved contaminant mass decreased by an estimated 80% by the end of the test, reaching the lowest values ever recorded at this site. Furthermore, the persistence of ethene 4 years after bioaugmentation suggests that the dechlorinating capacity of the remaining microbial community is comparable to the matrix diffusion of TCE into the dissolved phase.

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Section: Bioremediation Test: Metalscontrasting

confidence: 84%

A Long-Term Field Study of In Situ Bioremediation in a Fractured Conglomerate Trichloroethene Source Zone

Verce

Madrid

Gregory

et al. 2015

Bioremediation Journal

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“…In the past decade, a considerable number of studies have been performed to explain the occurrence of high As groundwater worldwide (He et al, 2010;Nicolli et al, 2010;Postma et al, 2010Postma et al, , 2007Reza et al, 2010b;van Geen et al, 2006;Zheng et al, 2004), and many hypotheses have been proposed to explain the mechanism of As enrichment in groundwater (van Geen et al, 2006;Zheng et al, 2004;Postma et al, 2010;Lowers et al, 2007). However, the mechanism of As mobilization and enrichment in groundwater is still a matter of intense debate.…”

Section: Introductionmentioning

confidence: 98%

Effect of irrigation on Fe(III)–SO42− redox cycling and arsenic mobilization in shallow groundwater from the Datong basin, China: Evidence from hydrochemical monitoring and modeling

Xie

Wang

et al. 2015

Journal of Hydrology

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“…Transformation and solubilization are vital mechanisms for the release of Fe and As in the presence of Shewanella sp. (Babechuk et al 2009;He et al 2010).…”

Section: Introductionmentioning

confidence: 98%

Biotransformation of Heavy Metals from Soil in Synthetic Medium Enriched with Glucose andShewanellasp. HN-41 at Various pH

Ayyasamy

Lee

2012

Geomicrobiology Journal

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The biotransformation of heavy metals from contaminated soil was examined using a facultative anaerobic bacterium Shewanella sp. HN-41. The experiments were carried out to assess the influence of glucose at various pH on the transformation of heavy metals from soil thorough solubilization. A preliminary study on the transformation of heavy metals from soil was first performed using a defined medium supplemented with glucose at 10, 20, and 30 mM to select the effective concentration. Among the three concentrations examined, glucose at 30 mM leached a highest level of metal ions. Therefore, 30 mM glucose was used as the representative carbon source for the subsequent experiments in a defined medium at various pH (5, 6, 7, 8, and 9). The organism HN-41 was not influenced by pH ranging from acidic to neutral and was able to metabolize all the metal elements from contaminated soil. The level of Fe, Cr, As, Mn, Pb, and Al solubilization ranged from 3 to 7664 mg kg −1 at various initial pH. The rate of metal solubilization was found to be low at neutral pH compared with acidic and alkaline. These results are expected to assist in the development of heavy metal transformation processes for the decontamination of heavy metal-contaminated soil.

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Geochemical processes controlling arsenic mobility in groundwater: A case study of arsenic mobilization and natural attenuation

Cited by 35 publications

References 57 publications

A Long-Term Field Study of In Situ Bioremediation in a Fractured Conglomerate Trichloroethene Source Zone

A Long-Term Field Study of In Situ Bioremediation in a Fractured Conglomerate Trichloroethene Source Zone

Effect of irrigation on Fe(III)–SO42− redox cycling and arsenic mobilization in shallow groundwater from the Datong basin, China: Evidence from hydrochemical monitoring and modeling

Biotransformation of Heavy Metals from Soil in Synthetic Medium Enriched with Glucose andShewanellasp. HN-41 at Various pH

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