Ecology and Biogeochemistry of in Situ Groundwater Bioremediation

Anderson, Robert; Lovley, Derek R.

doi:10.1007/978-1-4757-9074-0_7

Cited by 130 publications

(57 citation statements)

References 318 publications

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“…With the development of anaerobic conditions, Fe(III) is generally the most abundant potential electron acceptor for organic-matter oxidation (Lovley , 1997b. Thus, aquifers contaminated with organic compounds typically contain extensive zones in which Fe(III) reduction is the predominant terminal electron-accepting process (TEAP) (Christensen et al 1994;Anderson and Lovley 1997). In general, the zone in which Fe(III) reduction predominates is found downgradient of zones of methane production and sulfate reduction, and upgradient of zones of nitrate and Mn(IV) reduction, as shown in Figure 1.…”

Section: Oxidation Of Organic Contaminants Coupled To Fe(iii) Reductionmentioning

confidence: 99%

Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

Lovley¹,

Anderson

2000

Hydrogeology Journal

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154

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Dissimilatory Fe(III)-reducing microorganisms have the ability to destroy organic contaminants under anaerobic conditions by oxidizing them to carbon dioxide. Some Fe(III)-reducing microorganisms can also reductively dechlorinate chlorinated contaminants. Fe(III)-reducing microorganisms can reduce a variety of contaminant metals and convert them from soluble forms to forms that are likely to be immobilized in the subsurface. Studies in petroleum-contaminated aquifers have demonstrated that Fe(III)-reducing microorganisms can be effective agents in removing aromatic hydrocarbons from groundwater under anaerobic conditions. Laboratory studies have demonstrated the potential for Fe(III)-reducing microorganisms to remove uranium from contaminated groundwaters. The activity of Fe(III)-reducing microorganisms can be stimulated in several ways to enhance organic contaminant oxidation and metal reduction. Molecular analyses in both field and laboratory studies have demonstrated that microorganisms of the genus Geobacter become dominant members of the microbial community when Fe(III)-reducing conditions develop as the result of organic contamination, or when Fe(III) reduction is artificially stimulated. These results suggest that further understanding of the ecophysiology of Geobacter species would aid in better prediction of the natural attenuation of organic contaminants under anaerobic conditions and in the design of strategies for the bioremediation of subsurface metal contamination.RØsumØ Des micro-organismes simulant la rØduction du fer ont la capacitØ de dØtruire des polluants organiques dans des conditions anØrobies en les oxydant en dioxyde de carbone. Certains micro-organismes rØduc-teurs de fer peuvent aussi dØ-chlorer par rØduction des polluants chlorØs. Des micro-organismes rØducteurs de fer peuvent rØduire tout un ensemble de mØtaux polluants et les faire passer de formes solubles à des formes qui sont susceptibles d'tre immobilisØes dans le milieu souterrain. Des Øtudes d'aquifres polluØs par du pØtrole ont montrØ que des micro-organismes rØducteurs de fer peuvent tre des agents efficaces pour Øliminer les hydrocarbures aromatiques des eaux souterraines dans des conditions anØrobies. Des Øtudes en laboratoire ont montrØ que des micro-organismes rØducteurs de fer avaient la capacitØ d'Øliminer l'uranium d'eaux souterraines polluØes. L'activitØ de micro-organismes rØducteurs de fer peut tre stimulØe de diffØrentes manires pour augmenter l'oxydation de polluants organiques et la rØduction de mØtaux. Des analyses molØculaires concernant des Øtudes de terrain et de laboratoire ont montrØ que des microorganismes du genre Geobacter deviennent les membres dominants de la communautØ microbienne quand les conditions de rØduction en Fe(III) sont rØalisØes à la suite d'une pollution organique, ou lorsque la rØduction en Fe(III) est stimulØe artificiellement. Ces rØsultats laissent penser que des connaissances supplØ-mentaires sur l'Øcophysiologie des espces Geobacter devraient aider à une meilleure prØdiction...

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Section: Oxidation Of Organic Contaminants Coupled To Fe(iii) Reductionmentioning

confidence: 99%

Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

Lovley¹,

Anderson

2000

Hydrogeology Journal

Self Cite

154

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“…Anderson and Lovley 1997;Hohener et al 1998;Holliger et al 1995;Hunkeler et al 1999;Puhakka et al 2000;Thomas and Ward 1992).…”

Section: Introductionmentioning

confidence: 99%

Review: Microbial biocenoses in pristine aquifers and an assessment of investigative methods

2006

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The current knowledge of microbial biocenoses (communities) in pristine aquifers is presented in a review, which also discusses their relevance for questions of groundwater protection. Aquifers are heterogeneous on all scales and structured in a variety of habitats. The void spaces in many aquifers are small. The biocenoses are thus predominantly composed of microorganisms and, often, microinvertebrates. Larger voids and macroorganisms occur in karst cavities. Due to the absence of light, the biocenoses depend on chemical energy resources, which are, however, scarce in non-contaminated groundwater. The microorganisms thus show small cell sizes, low population densities and reduced activity; they developed specific strategies to survive oligotrophic conditions. The review also discusses the impact of contamination on the biocenoses, and the potential use of the biocenoses or specific organisms as indicators for groundwater quality, and the limits of this approach. Bacteria are either planktonic or attached to aquifer material, which requires both fluid and solid phase sampling. Most groundwater bacteria are viable but non-culturable. Consequently, cultivation techniques give an incomplete picture of the biocenoses, while methods from molecular microbiology provide genetic fingerprints of the entire community. Different analytical methods are available to count microorganisms, identify species, characterise microbial diversity, and measure activity.Résumé Cette revue expose l'état actuel des connaissances concernant les biocénoses microbiennes présentes dans les aquifères oligotrophes. L'impact d'une contamination sur les biocénoses est discuté, ainsi que le potentiel que Les bactéries sont planctoniques ou attachées aux matériaux de l'aquifère, ce qui demande unéchantillonnagè a la fois de l'eau et du substrat. De nombreuses méthodes sont aujourd'hui disponibles pour le comptage, l'identification et la caractérisation de la diversité, ainsi que la mesure des activités des organismes des aquifères. Comme la grande majorité des bactéries est viable mais non cultivable, les techniques de cultures actuelles ne donnent qu'une image incomplète des communautés, alors que les méthodes moléculaires développées récemment offrent la possibilité d'obtenir un profil de la communauté plus complet.Resumen Se presentauna reseña crítica del conocimiento actual de biocenosis microbiana (comunidades) en acuíferos prístinos la cual también discute su relevancia en términos de protección de aguas subterráneas. Los acuíferos son heterogéneos en todas las escalas y estructurados en una variedad de habitats. Los espacios vacíos en muchos acuíferos son pequeños. La biocenosis está por lo tanto compuesta predominantemente por microorganismos y, frecuentemente, microinvertebrados. Espacios más grandes y macroorganismos ocurren en cavidades kársticas. Debido a la ausencia de luz la biocenosis depende de recursos energéticos químicos los cuales, sin embargo, son escasos en agua subterránea no contaminada. Los microorganismos muestran...

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“…For bioremediation of contaminated soils, natural, or transgenic microbes in mixed culture are used (Atlas, 1995). However, for effective bioremediation of contaminated terrestrial or aquatic ecosystem, the chemical and microbial interactions along with biogeochemical and ecological balances of concerned ecosystem should be considered (Anderson and Lovley, 1997;Tiedje, 1997). Among various beneficial microbes, cyanobacteria can be used in nutrition, energy and agriculture sector because of their ability to fix atmospheric N 2 and CO 2 , and produce energy rich biomass containing myriad of metabolites of economic importance.…”

Section: Sustainable Agriculture and Microbesmentioning

confidence: 99%

Cyanobacterial Farming for Environment Friendly Sustainable Agriculture Practices: Innovations and Perspectives

Pathak

Rajneesh

Maurya

et al. 2018

Front. Environ. Sci.

166

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Sustainable supply of food and energy without posing any threat to environment is the current demand of our society in view of continuous increase in global human population and depletion of natural resources of energy. Cyanobacteria have recently emerged as potential candidates who can fulfill abovementioned needs due to their ability to efficiently harvest solar energy and convert it into biomass by simple utilization of CO 2 , water and nutrients. During conversion of radiant energy into chemical energy, these biological systems produce oxygen as a by-product. Cyanobacterial biomass can be used for the production of food, energy, biofertilizers, secondary metabolites of nutritional, cosmetics, and medicinal importance. Therefore, cyanobacterial farming is proposed as environment friendly sustainable agricultural practice which can produce biomass of very high value. Additionally, cyanobacterial farming helps in decreasing the level of greenhouse gas, i.e., CO 2 , and it can be also used for removing various contaminants from wastewater and soil. However, utilization of cyanobacteria for resolving the abovementioned problems is subjected to economic viability. In this review, we provide details on different aspects of cyanobacterial system that can help in developing sustainable agricultural practices. We also describe different large-scale cultivation systems for cyanobacterial farming and discuss their merits and demerits in terms of economic profitability.

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Ecology and Biogeochemistry of in Situ Groundwater Bioremediation

Cited by 130 publications

References 318 publications

Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

Influence of dissimilatory metal reduction on fate of organic and metal contaminants in the subsurface

Review: Microbial biocenoses in pristine aquifers and an assessment of investigative methods

Cyanobacterial Farming for Environment Friendly Sustainable Agriculture Practices: Innovations and Perspectives

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