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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

The plasma treatment of inorganic waste streams for the production of monolithic glass-ceramic tiles

Deegan, David January 2002 (has links)
No description available.
52

Urban waste management : the potential of household refuse for use in food and fuel production in Nairobi

Njenga, Beatrice Khamati January 1998 (has links)
Urban waste management poses problems in all cities of the world, but it also provides opportunities for innovative resource use. The Thesis begins by defining the waste management problem of Nairobi in context and then analytically reviews the international status of waste management, contrasting the circumstances in developed economies with those in Tropical Africa. An investigation of household refuse in Nairobi, exploring its embodied energy and its value for composting follows as the focus of the Thesis. Typical households were surveyed in relation to their waste management behaviour and agricultural activities. An attempt was made to analyse the physical and chemical composition of household refuse as well as its energy value. In addition to household surveys, a senior local government official and waste disposal crews were interviewed in order to ascertain current policies and management practices in the handling of waste. Particular attention was paid to the Eastlands area of the City. Ways in which refuse is incorporated into the food and energy cycles were identified. Among the important factors discerned are the role of family structure and the economic position of households. The validity of the research is discussed and recommendations are made for the future of waste management in relation to energy and food production in Nairobi. The findings of the research should have wide application in other African countries.
53

Interpreting agri-environmental policy : a comparative analysis of policy implementation in Finland and the UK

Juntti, Meri Johanna January 2002 (has links)
No description available.
54

Pesticide safety policy and control arrangements in Britain

Gilbert, David George Rollinson January 1987 (has links)
No description available.
55

Heavy metal extraction using advanced liquid-liquid style partitioning systems

Tucker, Kate Louise January 2015 (has links)
Understanding the behaviour of heavy metals involved in the nuclear fuel cycle is of paramount importance to the reprocessing and storage of spent nuclear fuel. These studies have attempted to obtain a greater understanding of the fundamental chemistry of these systems, by investigating extraction performance and speciation in current (PUREX) and proposed (GANEX) extraction processes. Various complexes have been shown to exist in the post-extracted organic fraction of the systems analysed. For Zr(IV), U(VI) and Np(VI) separated from aqueous nitric and hydrochloric using TBP, the complexes [Zr(NO3/Cl)4(TBP)4], [UO2(NO3/Cl)2(TBP)2] and [NpO2(NO3/Cl)2(TBP)2] formed, respectively. For Zr(IV) separated from aqueous mixtures of HNO3 and HCl at equal concentration, a preference was shown to [Zr(Cl)4(TBP)4] over the analogous nitrate complex. For U(VI) separated from aqueous mixtures of HNO3 and HCl, a preference was shown to [UO2(Cl)2(TBP)2], even at high aqueous nitrate concentrations. NMR data for Pu(IV) separated from aqueous HNO3, HCl and mixtures of both, using TBP were presented, where possible complexation was observed. It is thought that [Pu(NO3)4(TBP)4] or [PuCl4(TBP)4] species existed within the organic fraction for Pu(IV) separated from aqueous HNO3 and HCl, respectively. These systems showed high distribution ratios where an increase was observed with increasing aqueous acid concentration overall. Distribution ratio data were presented for the lanthanide series separated from aqueous nitric acid, using the proposed GANEX solvent system(s). The lanthanides analysed showed an increase in distribution ratio with increasing aqueous nitric acid concentration and with increasing TODGA concentration in the organic fraction. Heavier lanthanides were observed to give higher distribution ratios overall. The best distribution ratios were observed for lanthanides separated using 0.2 M TODGA with 1-octanol (5 % by volume) over the nitric acid concentration range analysed. For lanthanides separated using 0.5 M DMDOHEMA, an optimum distribution ratio was observed at around 6 M aqueous nitric acid concentration. The distribution ratio data for lanthanides separated from a range of DMDOHEMA concentrations, were observed to increase with increasing organic DMDOHEMA concentration. The distribution ratios observed for isotopes of Np, Am, Eu and Pu separated using 0.2 M TODGA, increased with increasing aqueous nitric acid concentration. The same trend was observed for the aforementioned isotopes separated using 0.5 M DMDOHEMA. However, pertechnetate separated using 0.2 M TODGA from aqueous nitric acid, showed a decrease in the distribution ratios observed over the acid concentration range analysed. This was contrary to pertechnetate separated from aqueous nitric acid using 0.5 M DMDOHEMA, where a small increase in distribution ratio was observed over the concentration range analysed. For Np(VI) separated from some proposed GANEX solvents, the 0.2 M TODGA/0.5 DMDOHEMA combination gave the best distribution of neptunium into the organic fraction. For Np(VI) separated using 0.5 M DMDOHEMA, the complex [Np(DMDOHEMA)2(NO3)4] was observed. Additional attempts to analyse Np(VI) behaviour under GANEX style conditions via EXAFS, were not successful due to immediate reduction of the Np(VI) on the beam line.
56

Extraction of ruthenium species from dilute aqueous streams using modified inorganic materials

Helps, Kevin D. January 1991 (has links)
No description available.
57

The irradiation effects on the solvent extraction system of tributyl phosphate-dodecane

Holland, Joe Paschal January 2011 (has links)
Typescript. / Digitized by Kansas Correctional Industries
58

Nuclear fuel reprocessing plant radioactive airborne effluents sources and treatment

Roles, Gary William January 1978 (has links)
No description available.
59

Optimization of breeding performance for metallic Pu-Th, U[superscript]233-Th, U[superscript]233-U[superscript]238 and for (Pu-U)0[subscript]2 fuels in LMFBRs

Lee, Chung-Chiang Patrick 12 1900 (has links)
No description available.
60

Calorimetry of 'red-oil reactions'

Glossop, Michael William January 1999 (has links)
No description available.

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