Aerobic biodegradation of trichloroethene without auxiliary substrates

Schmidt, Kathrin R.; Gaza, Sarah; Voropaev, Andrey; Ertl, Siegmund; Tiehm, Andreas

doi:10.1016/j.watres.2014.04.008

Cited by 33 publications

(27 citation statements)

References 24 publications

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“…Thus, oxidation of the carbon backbone of the ethene molecule is energetically unfavourable (Vogel et al, 1987). Schmidt et al (2014) recently reported aerobic TCE oxidation as a sole carbon source which may be evidence of a novel metabolic process not witnessed before. Nonetheless, susceptibility to the reductive pathway decreases proportionately with the ratio of chlorine to carbon substituents.…”

Section: Development and Implications Of Anoxic-oxic Interfacesmentioning

confidence: 99%

Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

et al. 2018

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Chlorinated ethenes (CEs) are legacy contaminants whose chemical footprint is expected to persist in aquifers around the world for many decades to come. These organohalides have been reported in river systems with concerning prevalence and are thought to be significant chemical stressors in urban water ecosystems. The aquifer-river interface (known as the hyporheic zone) is a critical pathway for CE discharge to surface water bodies in groundwater baseflow. This pore water system may represent a natural bioreactor where anoxic and oxic biotransformation process act in synergy to reduce or even eliminate contaminant fluxes to surface water. Here, we critically review current process understanding of anaerobic CE respiration in the competitive framework of hyporheic zone biogeochemical cycling fuelled by in-situ fermentation of natural organic matter. We conceptualise anoxic-oxic interface development for metabolic and co-metabolic mineralisation by a range of aerobic bacteria with a focus on vinyl chloride degradation pathways. The superimposition of microbial metabolic processes occurring in sediment biofilms and bulk solute transport delivering reactants produces a scale dependence in contaminant transformation rates. Process interpretation is often confounded by the natural geological heterogeneity typical of most riverbed environments. We discuss insights from recent field experience of CE plumes discharging to surface water and present a range of practical monitoring technologies which address this inherent complexity at different spatial scales. Future research must address key dynamics which link supply of limiting reactants, residence times and microbial ecophysiology to better understand the natural attenuation capacity of hyporheic systems.

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Section: Development and Implications Of Anoxic-oxic Interfacesmentioning

confidence: 99%

Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

et al. 2018

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“…Biodegradation of organic pollutants and nitrogen-containing compounds (nitrate, nitrite, ammonia) as beneficial ecosystem services is investigated by using modern PCR-techniques [19, 20] as well as by isotope fractionation [26–28] within laboratory degradation studies with original Taihu materials. Powerful PCR methods are also used to detect microorganisms having harmful effects such as bacteria with antibiotic resistance genes [29] as well as pathogenic viruses and bacteria, originating e.g.…”

Section: Research Topics—around the Whole Water Cyclementioning

confidence: 99%

Since 2015 the SinoGerman research project SIGN supports water quality improvement in the Taihu region, China

et al. 2016

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The Taihu (Tai lake) region is one of the most economically prospering areas of China. Due to its location within this district of high anthropogenic activities, Taihu represents a drastic example of water pollution with nutrients (nitrogen, phosphate), organic contaminants and heavy metals. High nutrient levels combined with very shallow water create large eutrophication problems, threatening the drinking water supply of the surrounding cities. Within the international research project SIGN (SinoGerman Water Supply Network, www.water-sign.de), funded by the German Federal Ministry of Education and Research (BMBF), a powerful consortium of fifteen German partners is working on the overall aim of assuring good water quality from the source to the tap by taking the whole water cycle into account: The diverse research topics range from future proof strategies for urban catchment, innovative monitoring and early warning approaches for lake and drinking water, control and use of biological degradation processes, efficient water treatment technologies, adapted water distribution up to promoting sector policy by good governance. The implementation in China is warranted, since the leading Chinese research institutes as well as the most important local stakeholders, e.g. water suppliers, are involved.

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“…Certain organic pollutants can serve as both carbon and energy source for microbes capable of catabolizing them. Trichloroethene (TCE) is a common ground water pollutant that can be completely broken down by aerobic bacteria that are able to use TCE as their sole growth substrate [100]. Bacteria such as Pseudomonas fluorescens and Kocuria sp.…”

Section: Bacterial Bioremediationmentioning

confidence: 99%

Bioelectrochemical and Conventional Bioremediation of Environmental Pollutants

Pisciotta¹,

Dolceamore²

2016

J Microb Biochem Technol

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One of the first widely used, synthetically-produced pesticides was the organochloride class agent DDT. From the Second World War until its ban in the early 1970's, DDT was deployed on a vast scale for control of insects and insect-borne diseases and as a highly effective agricultural pesticide [11]. For example, over a half million pounds of DDT was applied to salt marshes in Cape May County, New Jersey

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Aerobic biodegradation of trichloroethene without auxiliary substrates

Cited by 33 publications

References 24 publications

Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

Since 2015 the SinoGerman research project SIGN supports water quality improvement in the Taihu region, China

Bioelectrochemical and Conventional Bioremediation of Environmental Pollutants

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