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  • 1
    Electronic Resource
    Electronic Resource
    Organochlorine Contamination in Sediments of the Inner Thames Estuary (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 9 (1995), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The saltmarsh at Two Tree Island, situated in the Thames estuary, has previously been identified as exhibiting a relatively enhanced degree of contamination with respect to organochlorine insecticides and polychlorinated biphenyls. This survey of sediment samples from mud flats on the north bank of the River Thames, creeks surrounding Canvey Island and from Two Tree Island, indicated that contamination with organochlorine and polychlorinated biphenyls was ubiquitous throughout the inner Thames estuary. Values observed were in agreement with those in other European estuaries, and the degree of contamination at Two Tree Island was considered to reflect the local background. The outfall from Benfleet sewage-treatment works was identified as a possible source of contaminants: however, no other point sources were located. Samples of annelids taken from mud flats by Two Tree Island had accumulated penta- and hexa-chlorinated biphenyls to a greater degree than lower chlorinated cogeners, and demonstrated signs of an ability to metabolize DDT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1995.tb01490.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Investment Appraisal in the Water Industry of England and Wales (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 16 (2002), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Since privatisation in 1989, the changing nature of the water industry in England and Wales has increased the need for effective investment appraisal. Previous research highlighted many aspects of the industry that could detract from the efficacy of conventional discounted cash-flow techniques, and found that an investment-appraisal technique must fulfil a number of criteria in order to overcome these difficulties. This paper examines a number of financial and strategic management techniques for investment appraisal, and assesses their suitability with reference to these criteria. It shows that, of the studied techniques, the ‘balanced scorecard’appears to be most suited for use in the water industry of England and Wales.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.2002.tb00378.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The Environmental Impact of a Chemical Spill from a Timber-Treatment Works on a Lowland River System (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 10 (1996), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: A major timber-preservative spillage, resulting from a fire at a timber yard, released substantial quantities of tributyltin and lindane (g hexachlorocyclohexane) into the River Bourne - a tributary of the River Thames. This paper describes the chemical and biological effects resulting from the incident. Water-column concentrations in the River Bourne South ranged from below detection limits to 5200 μg/l and 3700 μg/l for tributyltin and lindane respectively, with contamination extending 80 km into the Thames estuary. The high concentration of pollutants caused extensive fish mortality and virtually eradicated the invertebrate population in the immediate vicinity of the spill. Although sediment monitoring revealed initially high surficial sediment concentrations of tributyltin (3300 ng/g) and lindane (490 ng/g), loadings declined over a period of time, but it is perceived that contaminated sediments may pose a longer-term threat to benthic communities, particularly in the proximity of the spill site.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1996.tb00041.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Tidal Exchanges Between Orplands Managed Retreat Site and the Blackwater Estuary, Essex (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 11 (1997), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: ‘Managed retreat’ is a salt-marsh restoration technique which is under experimental implementation in the UK. The technique involves the engineered tidal inundation of coastal land in front of re-aligned flood defences. Salt marshes developed by this method are intended to act as hydraulic buffers in front of coastal defences and to provide zones of environmental enhancement. Two managed retreat trials were instigated in 1995 on the Blackwater Estuary, Essex, UK. In June 1995, two months after breaching the seawalls, the initial environmental impact and geochemical development of the Orplands managed retreat site were investigated by surveys of tidal exchanges. Tidal stage curves and quantities of exchange were determined by four hydrological surveys at the extremes of a neap-spring tidal cycle, and the chemistry of exchanges was investigated by water sampling during these surveys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1997.tb00992.x
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  • 5
    Electronic Resource
    Electronic Resource
    The Fate of Heavy Metals in Pilot-Plant Scale Upflow Sludge-Blanket Clarifiers (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 1 (1987), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The Removal of heavy metals and aluminium residuals during upflow sludge-blanket clarification was investigated using a pilot-plant system. Pilot units treating predosed raw water on site were assessed for sludge-blanket formation and stabilization, and were found to produce clarified water of a comparable quality to the main works units after the start-up and stabilization periods were complete. The heavy metals Cr, Fe, Mn, and Ni were the only heavy metals detectable at the investigation site and these occurred at concentrations well below guidelines values for potable abstraction and supply.Mean removals of Fe, Mn, Cr, and Ni were about 98, 89, 51, and 30 per cent respectively, during steady-state operation, and Fe, Mn, and Cr all displayed reduced removals during transient changes in surface load, whereas Ni removal appeared to be relatively independent. Aluminium residuals derived from the dosed alum coagulant also showed decreases in removal from about 83 per cent during steady-state operation to between 40 and 50 per cent during transient experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1987.tb01192.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The Life-Cycle Analysis of Small-Scale Sewage-Treatment Processes (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 9 (1995), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The environmental impact of small-scale sewage-treatment works has been evaluated using the technique of ‘life-cycle analysis’. Three sewage-treatment works with different process options were analysed to identify and quantify material use, energy use and environmental releases during construction, operation and demolition. This enabled (i) a comparison to be made between process options, and (ii) the identification of opportunities for the improvement of environmental performance. Subject to satisfactory sewage treatment and sludge disposal, the technique identified additional impacts of importance, which have implications for energy management, works design, supplier management and general environmental policy. Life-cycle analysis provides a useful insight into environmental impact and has potential for wider application within the water industry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1995.tb00945.x
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of bacterial growth on the forms of cadmium in defined culture media (1980)
    Springer
    Bulletin of environmental contamination and toxicology 24 (1980), S. 196-203 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01608097
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Analysis and incidence of organophosphorus compounds in sewage sludges (1981)
    Springer
    Bulletin of environmental contamination and toxicology 26 (1981), S. 116-123 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01622064
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Factors affecting the removal of metals during activated sludge wastewater treatment I. The role of soluble ligands (1984)
    Springer
    Archives of environmental contamination and toxicology 13 (1984), S. 383-390 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Samples of mixed liquor were withdrawn from a laboratory-scale activated sludge simulation operated at a range of sludge ages from 3 to 12 days in order to examine the difference in metal uptake by the mixed liquor biomass in the absence and presence of soluble ligands. One half of the samples were centrifuged, washed, and resuspended in physiological saline solution, and the rest were left unchanged. In another experiment, aliquots of synthetic sewage were added to mixed liquor samples to investigate the effect of increased soluble influent sewage ligands on metal uptake. It was found that at low sludge ages, uptake of metals by biomass was lower in the presence of soluble ligands than in their absence, but as the sludge age increased uptake in the presence of soluble ligands also increased. It is suggested that at low sludge ages, ligands predominantly prevented metal uptake by the biomass by chelating the metals and stabilizing them in solution and, at longer sludge ages, ligands predominantly enhanced uptake. Increasing the concentration of synthetic sewage caused a reduction in metal removal and it is suggested that soluble ligands in the synthetic sewage were responsible for preventing metal uptake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01056253
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Factors affecting the removal of metals during activated sludge wastewater treatment II. The role of mixed liquor biomass (1984)
    Springer
    Archives of environmental contamination and toxicology 13 (1984), S. 391-402 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Samples of mixed liquor from a laboratory-scale activated sludge simulation, operated at a range of sludge ages from 3 to 12 days, were treated with formaldehyde in order to obtain a metabolically inactive biomass. The metal removal behavior of this biomass was compared with that of untreated biomass. Only Cu and Ni were found to exhibit a high degree of removal in the presence of active biomass. Manganese, Cd, Co, and Tl demonstrated removals little affected by the activity of the biomass, and at longer sludge ages more metal was taken up by formaldehyde-treated than by untreated cells. Dispersed mixed liquor in the form of a bulking sludge was found to have a greater affinity for most metals than a well-settled, compact mixed liquor. Consequently, it is proposed that the important factors in metal removal by the mixed liquor solids were related to their behavior as particulates, the physical characteristics of the particle being more important than their viability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01056254
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    Paper (German National Licenses)
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