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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/702

Title: Characterisation and normalisation factors for life cycle impact assessment mined abiotic resources categories in South Africa - The manufacturing of catalytic converter exhaust systems as a case study
Authors: Strauss, K
Brent, AC
Hietkamp, S
Keywords: Catalytic converter exhaust systems
Environmental performance
Life cycle impact assessment
Mined abiotic resources categories
Resource depletion
South Africa
Issue Date: May-2006
Publisher: Ecomed Publishers
Citation: Strauss, K, Brent, AC and Hietkamp, S. 2006. Characterisation and normalisation factors for life cycle impact assessment mined abiotic resources categories in South Africa - The manufacturing of catalytic converter exhaust systems as a case study. International Journal Of Life Cycle Assessment, Vol 11(3), pp 162-171
Abstract: Current Life Cycle Impact Assessment (LCIA) procedures have demonstrated certain limitations in the South African manufacturing industry. The aim of this paper is to propose new characterisation and normalisation factors for classified mined abiotic resource depletion categories in the South African context. These factors should reflect the importance of mined resources as they relate to region-specific resource depletion. The method can also be applied to determine global factors. The reserve base of the most commonly produced minerals in South Africa is used as basis to determine characterisation factors for a non-renewable mineral resources category. The average production of these minerals from 1991 to 2000 is compared to economically Demonstrated and Demonstrated Marginal Reserves (and not ultimate reserves) to obtain the characterisation factors in equivalence units, with platinum as the reference mineral. Similarly, for a non-renewable energy resources category, coal is used in South Africa as equivalent unit as it is the most important fossil fuel for the country. Crude oil and natural gas resources are currently obtained from reserves elsewhere in the world and characterisation factors are therefore determined using global resources and production levels. The normalisation factors are based on the total economic reserves of key South African minerals and world non-renewable energy resources respectively. A case study of the manufacturing of an exhaust system for a standard sedan is used to compare LCIA results for mined abiotic resource categories that are based on current LCIA factors and the new South African factors. The South African LCIA procedure differs from current methods in that it shows the importance of other mined resources, i.e. iron ore and crude oil, relative to PGMs and coal for the manufacturing life cycle of the exhaust system. With respect to PGMs, the current characterisation factors are based on the concentrations of the metals in the ores and the ultimate reserves, which are erroneous with respect to the actual availability of the mineral resources and the depletion burden placed on these minerals is consequently too high. The South African LCIA procedure for mined abiotic resources depletion shows the significance of choosing a method, which is inline with the current situation in the mining industry and its limitations. It is proposed to similarly investigate the impacts of the use of other natural resource groups. Water, specifically, must receive attention in the characterisation phase of LCIAs in South African.
Description: Copyright: 2006 Ecomed Publishers
URI: http://hdl.handle.net/10204/702
ISSN: 0948-3349
Appears in Collections:Resource-based sustainable development
Water resources and human health
Mining and geoscience
General science, engineering & technology

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