1,722,105 research outputs found
Mechanistic flow modelling and LCA results in support of Evaluating landfill aftercare strategies: a life cycle assessment approach
No full textDataset supporting:
Turner, David, Beaven, Richard and Woodman, Nicholas (2016) Evaluating landfill aftercare strategies: a life cycle assessment approach. Waste Management
The zip file contains three Excel spreadsheet files.
"Mechanistic flow modelling and LCA results.xlsx" contains results of the 4 different scenarios modeled, organized by 1) pathway 2) impact category and 3) by species.
The remaining two spreadsheet files contain the results of two different sensitivity analyses.</span
Turner, David, NX67376
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/422462Surname: TURNER. Given Name(s) or Initials: DAVID. Military Service Number or Last Known Location: NX67376. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 40226.248097
Item: [2016.0049.54723] "Turner, David, NX67376
Combined material flow analysis and life cycle assessment as a support tool for solid waste management decision making
No full textMaterial flow analysis (MFA) and life cycle assessment (LCA) have both widely been applied to support solid waste management (SWM) decision making. However, they are often applied independently rather than conjointly. This paper presents an approach that combines the MFA and LCA methodologies to evaluate large and complex SWM systems from an environmental perspective. The approach was applied to evaluate the environmental performance, focusing on greenhouse gas (GHG) emissions, of a local authority SWM system and to compare it with alternative systems to assess the potential effectiveness of different waste policy measures. The MFA results suggest that national recycling targets are unlikely to be met even if the assessed policies are implemented optimally. It is likely that for the targets to be met, investigated policies would need to be combined with additional policies that target reductions in waste arisings. The LCA results found landfilling of residual waste to be the dominant source of GHG burdens for the existing system, whilst material reprocessing was found to result in GHG benefits. Overall, each of the alternative systems investigated were found to result in lower GHG impacts compared to the existing system, with the diversion of food waste from the residual waste stream found to be potentially the most effective strategy to reduce GHG emissions. The results of this study demonstrate that the complementary methodologies of MFA and LCA can be used in combination to provide policy and decision makers with valuable information about the environmental performance of SWM system
Land Grant Application- Turner, David (New Vineyard)
Get PDFLand grant application submitted to the Maine Land Office for David Turner for service in the Revolutionary War.https://digitalmaine.com/revolutionary_war_me_land_office/1913/thumbnail.jp
Evaluating the life cycle climate impacts of solid waste management
No full textThis thesis comprises three papers that address the evaluation of potential climate impacts of solid waste management (SWM) systems and processes from a life cycle perspective for purpose of decision-support. Paper I presents a critical review of the carbon footprint quantification and communication practice of large UK-based waste management companies. Results indicated a lack of methodological consistency and transparency in current practice, emphasising the need for a robust, transparent, and standardised approach to corporate carbon footprint quantification and reporting.Paper I also describes the importance of greenhouse gas (GHG) emission factors (EF) in helping stakeholders better understand and address the potential climate impacts of their SWM activities. However, existing EFs were reviewed in Paper II and were found to lack transparency and breadth. Consequently, Paper II presents an original and fully transparent series of GHG EFs for the recycling of a wide range of source-segregated materials . Results showed that materials recycling generally leads to (often substantial) climate benefits, due to avoided primary material production. However, results also highlighted the dearth of available high quality materials recycling life cycle inventory data, which are essential to support effective SWM decision-making.Paper III presents a novel, practical framework for evaluating the potential climate impacts of complex SWM systems through the innovative use of publically-available waste flow data and a combined material flow analysis (MFA) and LCA approach. The performance of a complete, meso-level SWM system was evaluated and the potential effectiveness of real world waste policies was analysed. Results showed that landfilling was the greatest source of potential impacts for the existing system, whilst the increased diversion of food waste from landfill lead to the greatest reduction in potential impacts.Overall, this thesis presents an original, practical analytical framework and valuable information to support decision makers at multiple levels in evaluating the potential life cycle climate impacts of their SWM activities
Reduced dose insecticide use in cereals : effects on insect pests and predators
No full textThe insecticides deltamethrin, dimethoate and Studies investigated the intrinsic toxicity of pirimicarb to Rhopalosiphum padi (Walk) (Homoptera: Aphididae) in the laboratory on a simple glass substrate. The dose-response data generated was used to predict reductions of cereal aphid populations in the field using reduced dose insecticide rates. The predicted reductions were initially tested under semi-field conditions and the results showed that above a certain dose threshold the predictions fitted well for deltamethrin. When predictions were tested in the field, predicted and observed population reductions were found to correlate well for deltamethrin and aphid control using reduced rate insecticide doses was not significantly different to a full field rate application. Temperature was shown to influence the toxicity of topically applied X-cyhalothrin and dimethoate to the cereal aphids R. padi and Sitobion avenae (Homoptera: Aphididae). The toxicity of A-cyhalothrin was negatively and dimethoate positively correlated with temperature. S. avenae was more susceptible than R. padi to topical applications of both insecticides. Residual exposure to ?L-cyhalothrin and dimethoate affected their toxicity to the aphids R. padi and S. avenae at different temperatures. A negative temperature coefficient was shown for 1-cyhalothrin whilst that of dimethoate was more complicated. Altering the route of exposure affected the susceptibility of the aphids to the insecticides. Laboratory exposure of aphids to deposits of l-cyhalothrin applied in the field showed the same trends as X-cyhalothrin applied in the laboratory. sub-lethal The application of padi individuals affected measurements of their growth and development. Development time, adult weight, number of nymphs produced, mrgr and rm values of the aphids were significantly different from untreated aphids when reared at an ambient temperature of 12°C. There were no differences between measurements of aphid growth and development at ambient temperatures of 18 and 25°C. 1-cyhalothrin to R. doses of Substrate type affected the residual toxicity of laboratory applied doses of deltamethrin and dimethoate to carabid beetles (Goleoptera: Carabidae). Application of insecticide dose-rates similar to those used for aphid control were toxic on glass but relatively harmless on soil. The exposure to an insecticide by topical or residual application affected aphid consumption of carabid beetles in the laboratory. Presenting carabid beetles with insecticide contaminated aphids reduced the beetles consumption of the aphids compared to controls. When the contaminated prey were removed aphid consumption returned to that of the controls. The potential and limitations of reduced dose insecticide rates for iPM in cereals are discussed.</p
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