Biostabilization of Sediments PDF Download

Author: Wolfgang E. Krumbein
Publisher:
ISBN: 9783814204833
Category : Biofilms
Languages : en
Pages : 526

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Author: Trevor Tolhurst
Publisher:
ISBN:
Category :
Languages : en
Pages : 61

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Author: Sabine Ulrike Gerbersdorf
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Terri-Ann Frances Sutherland
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Moritz Thom
Publisher:
ISBN:
Category : Beds
Languages : en
Pages :

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Author: Neville Burt
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 490

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There is an alarming tendency today to assume that something calculated by a computer must be correct, yet the phrase 'garbage in, garbage out' (gigo) is possibly nowhere more (generally) appropriate than in computer modelling of cohesive sediment behaviour. The behaviour of 'mud' is highly complex and one only needs to look at a sample under a microscope to see why - the variety of particle shapes, not to mention the presence of living organisms, make it a substance with properties virtually unique to its situation which even change with time. For many years most researchers tended to avoid it, preferring to study sand and gravel, but a dedicated few tackled it and found a forum for discussing their work in the first Cohesive Sediments Workshop in Florida in 1980. The workshop met about every three years resulting in publication of some of the most definitive papers on the subject. By 1994 it was time to recognise the extensive research being carried on in Europe by holding the workshop in that region. Intercoh '94 (the 4th Nearshore and Estuarine Cohesive Sediment Transport Conference) drew together about 100 of the world's leading researchers in the field. The resulting papers, presented in this volume, truly represent the definitive state of the art on the measurement and modelling of mud properties today.

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309168961
Category : Technology & Engineering
Languages : en
Pages : 432

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Bioavailability refers to the extent to which humans and ecological receptors are exposed to contaminants in soil or sediment. The concept of bioavailability has recently piqued the interest of the hazardous waste industry as an important consideration in deciding how much waste to clean up. The rationale is that if contaminants in soil and sediment are not bioavailable, then more contaminant mass can be left in place without creating additional risk. A new NRC report notes that the potential for the consideration of bioavailability to influence decision-making is greatest where certain chemical, environmental, and regulatory factors align. The current use of bioavailability in risk assessment and hazardous waste cleanup regulations is demystified, and acceptable tools and models for bioavailability assessment are discussed and ranked according to seven criteria. Finally, the intimate link between bioavailability and bioremediation is explored. The report concludes with suggestions for moving bioavailability forward in the regulatory arena for both soil and sediment cleanup.

Author: José Arribas
Publisher: Geological Society of America
ISBN: 0813724201
Category : Science
Languages : en
Pages : 406

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Author:
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ISBN:
Category :
Languages : en
Pages : 0

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The research assessed the fundamental character of the binding of polycyclic aromatic hydrocarbons (PAH) compounds to sediments that make the PAHs more or less bioavailable and toxic. Complementary techniques were employed to provide direct microscale information on-the sequestration of PAH contaminants in Milwaukee Harbor sediment particles. Two-step laser mass spectrometry was used for PAH measurements, infrared microscopy was used for organic carbon measurements, and scanning electron microscopy with wavelength dispersive X-ray spectroscopy was used for elemental microanalysis. PAH concentrations on coal- and wood-derived particles were found to be several orders of magnitude higher than on silica particles. The coal/wood-derived particles constitute only 5% of the sediment by weight but contain 62% of the total PAHs. The remaining 38% are mainly in a clay and silt fraction. Desorption kinetic studies on these separated fractions revealed a relatively low availability of PAHs from the coal/wood fractions and a high availability from the clay/silt fractions. Preliminary work was done to understand the effects of degrading bacteria on contaminated sediment. The results indicated that bacteria and PAHs are co-located on the particles and degradation should not be hampered by spatial considerations.

Author: Bernd Westrich
Publisher: Springer Science & Business Media
ISBN: 3540347852
Category : Science
Languages : en
Pages : 463

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This is the first interdisciplinary book on the mobilization of nutrients and pollutants in the water phase due to hydrodynamic processes. Coverage includes the formation of aggregates in turbulent water; flocks and biofilms from organic reactions; and the formation of new surfaces for re-adsorption of dissolved pollutants. The book gathers papers resulting from an International Symposium on Sediment Dynamics and Pollutant Mobility in River Basins in Hamburg, Germany, March, 2006.