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Bioremediation of chlorinated solvents ; two interesting cases in difficult soil conditions

Slenders, J.L.A. (author), Borger, A.R. (author), Gerritse, J. (author), Langenhoff, A.A.M. (author), ter Meer, J. (author), Baartmans, R.F.W. (author), de Kreuk, H. (author), Verhaagen, P. (author), Theeuwen, J. (author), TNO Milieu, Energie en Procesinnovatie (author)

conference paper 2000

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Intrinsic and stimulated in situ biodegradation applied in in-situ treatment zones at sites contaminated with hexachlorocyclohexane (HCH)

Langenhoff, A.A.M. (author), Staps, J.J.M. (author), Pijls, C. (author), Alphenaar, A. (author), Zwiep, G. (author), Rijnaarts, H.H.M. (author), TNO Milieu, Energie en Procesinnovatie (author)

The pollution of soil and groundwater with hexachlorocyclohexane (HCH) has caused serious environmental problems. Mineralisation of some HCH isomers can be expected under aerobic conditions whereas all isomers are known to be bioconverted to intermediate products under anaerobic conditions. Hence, redox conditions can be expected to have strong...

conference paper 2000

document

Hydrogen as indicator for redox conditions and dechlorination

TNO Milieu, Energie en Procesinnovatie (author), ter Meer, J. (author), Gerritse, J. (author), di Mauro, C. (author), Harkes, M.P. (author), Rijnaarts, H.H.M. (author)

The use of intrinsic degradation processes (natural attenuation) is becoming the basis for the restoration of many contaminated sites. Within this context, measuring concentrations of hydrogen in groundwater is important in two ways. Firstly, the hydrogen concentration can be used to characterize redox conditions. Secondly, hydrogen may be an...

conference paper 2000

document

Time and land-use as interpretation keys for the evaluation of different remedial scenarios

TNO Milieu, Energie en Procesinnovatie (author), di Mauro, C. (author), van Teunenbroek, T. (author), Sinke, A. (author)

In the regulated community there is often concern as to whether mass removal at a contaminated site actually reduces risk, or whether the small risk reductions achieved warrant the large costs incurred. Decision-makers have to select feasible solutions based on the required risk reduction, costs of the remediation and environmental impact. Thus,...

conference paper 2000

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Assessing the wider environmental value of remediating land contamination

TNO Milieu, Energie en Procesinnovatie (author), Bardos, R.P. (author), Kearney, T.E. (author), Nathanail, C.P. (author), Weenk, A. (author), Martin, I.D. (author)

The aim of this paper is to consider qualitative and quantitative approaches for assessing the wider environmental value of remediating land contamination. In terms of the environmental element of sustainable development, a remediation project's overall environmental performance is the sum of the environmental elements of the core and non-core...

conference paper 2000

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The occurrence of MTBE in ground water in Europe

TNO Milieu, Energie en Procesinnovatie (author), Langenhoff, A.A.M. (author), van Teunenbroek, T. (author), Effenberger, M. (author), Schirmer, M. (author)

conference paper 2000

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Consoil 2000: Foreword and acknowledgement

TNO Milieu, Energie en Procesinnovatie (author), Harder, W. (author), Arendt, F. (author)

conference paper 2000

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Inverse modeling of groundwater flow and groundwater mass transport

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), Valstar, J. (author)

conference paper 2000

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Innovative reactive barrier technologies for regional contaminated groundwater

TNO Milieu, Energie en Procesinnovatie (author), Merkel, P. (author), Weiβ, H. (author), Teutsch, G. (author), Rijnaarts, H.H.M. (author)

At many industrial sites inadequate waste disposal, leakages and war damages have led to severe groundwater contamination on a regional scale. Standard hydraulic groundwater remediation methods, such as pump-and-treat, in most cases do not lead to satisfactory results, due to the persistence of organic contaminants and the resulting very long...

conference paper 2000

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The role of soil quality maps in the reuse of lightly contaminated soil

Netherlands Institute of Applied Geoscience TNO (author), Lamé, F.P.J. (author), Leenaers, H. (author), Zegwaard, J. (author)

In 1999 the Dutch government agreed on a new policy regarding the reuse of lightly contaminated soil. From now on, lightly contaminated soil may be reused under conditions of soil-quality management. The municipal authorities supervise the reuse under this new regime. Two basic criteria need to be met before reuse of lightly contaminated soil is...

conference paper 2000

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Knowledge-based sampling strategy for soil stockpiles

Nederlands Instituut voor Toegepaste Geowetenschappen TNO Technisch Physische Dienst TNO - TH (author), Lamé, F. (author), Derksen, G. (author), Honders, T. (author), Gadella, M. (author), Maas, T. (author)

Over the last three years the Centre for Soil Treatment has sampled 2570 soil stockpiles for the assessment of soil quality. For all stockpiles the same sampling strategy was used. 100 increments of approximately 180 grams were taken and collected into two batch samples. Appropriate sample pre-treatment and analyses resulted in two sets of...

conference paper 2000

document

In-situ remediation of contaminated sediments: conceivable and feasible?!

TNO Milieu, Energie en Procesinnovatie (author), Joziasse, J. (author), van der Gun, J. (author)

In-situ remediation has assumed large proportions in dealing with terrestrial soil pollution. Although implementation of in-situ remediation for contaminated sediments is restricted by the fact that dredging is necessary for nautical or water management reasons, it should not be discarded beforehand. In this paper a number of potentially...

conference paper 2000

document

Accelerated physical ripening of PAH and oil contaminated sediment to distinguish critical steps in remediation

TNO Milieu, Energie en Procesinnovatie (author), Vermeulen, J. (author), van Dijk, S. (author), Grotenhuis, T. (author), Joziasse, J. (author), Rulkens, W. (author)

conference paper 2000

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The influence of natural attenuation on the risks and aftercare of former landfills

TNO Milieu, Energie en Procesinnovatie (author), Slenders, J.L.A. (author), Marinussen, M. (author), van der Ben, J. (author), van Vossen, W. (author)

At this moment the results of an extensive set of soil and groundwater analyses of about 80 former Dutch landfills are being processed. The study not only has to produce an image of soil and groundwater quality in and around landfills, but also has to lead to a more solid estimate of aftercare measures at the 3800 former landfills in the...

conference paper 2000

document

Natural attenuation of benzene as evidenced by isotope analysis

TNO Milieu, Energie en Procesinnovatie (author), Volkering, F. (author), Tonnaer, H. (author), Verschuur, E.M.C. (author), Langenhoff, A.A.M. (author), Heimovaara, T.J. (author), Barkhuis, R. (author)

conference paper 2000

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Intrinsic dechlorination of 1,2-dichloroethane at an industrial site

TNO Milieu, Energie en Procesinnovatie (author), Bosma, T.N.P. (author), van Aalst-van Leeuwen, M.A. (author), Gerritse, J. (author), van Heiningen, E. (author), Taat, J. (author), Pruijn, M. (author)

Bioremediation strategies for an industrial site located in the Rotterdam Harbor Area, the Netherlands and contaminated with 1,2-dichloroethane (1,2-DCA), are under investigation. The contamination is present in a confined anaerobic aquifer. The objective of the research is to assess the potential of intrinsic (bio )degradation and enhanced...

conference paper 1998

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Resistive heating enhanced soil vapor extraction of chlorinated solvents from trichloroethylene contaminated silty, low permeable soil

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), van Zutphen, M. (author), Heron, G. (author), Enfield, C.G. (author), Christensen, T.H. (author)

A 2D-laboratory box experiment (12 x 56 x 116 cm) was conducted to simulate the enhancement of soil vapor extraction by the application of low frequency electrical heating Uoule heating) for the remediation of a low permeable, silty soil contaminated with trichloroethylene. Joule heating enlarged the flux of extracted TCE with a factor 19 (when...

conference paper 1998

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Intrinsic bioremediation in the case of a diesel oil contamination at a railway yard: investigation and possible implementation

Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author), Staps, J.J.M. (author), Griffioen, J. (author), Kok, A.P. (author)

conference paper 1998

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Target values and background levels in the Netherlands: how to define good soil quality

TNO Milieu, Energie en Procesinnovatie (author), Lamé, F.P.J. (author), Leenaers, H. (author)

conference paper 1998

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ASSISTERIX - a TNO Software Product for Soil Protection at Industrial Sites

TNO Milieu, Energie en Procesinnovatie (author), de Weger, D. (author)

conference paper 1998