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Exergy losses during recycling and the resource efficiency of product systems

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  • Castro, M.B.G.
  • Remmerswaal, J.A.M.
  • Brezet, J.C.
  • Reuter, M.A.

Abstract

Recycling materials have always some degree of contamination. The presence of contaminations in the recycling streams causes a shift in the original composition of the materials to recycle. As a consequence, their quality may decrease with each recycling step. Additionally, lower quality resources are produced from resource streams that had initially a higher quality. These quality losses cannot be measured by mass balances, as the quality degradation cannot be translated by mass measures alone. To account all losses caused by recycling contaminations, all downstream recycling processes required to bring the materials back to the resource cycles must be included. This article describes a method to calculate the exergy content and exergy losses of metal solutions during recovery and recycling. The losses attributed to recycling, namely the material losses, the contamination losses with other metals, and the consequent need for dilution can be used as indicators of the quality loss of materials and of the efficiency of resource use in product systems. Therefore, exergy is proposed here as a measure of the efficiency of resources use.

Suggested Citation

  • Castro, M.B.G. & Remmerswaal, J.A.M. & Brezet, J.C. & Reuter, M.A., 2007. "Exergy losses during recycling and the resource efficiency of product systems," Resources, Conservation & Recycling, Elsevier, vol. 52(2), pages 219-233.
    • Handle: RePEc:eee:recore:v:52:y:2007:i:2:p:219-233
    DOI: 10.1016/j.resconrec.2007.01.014
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    References listed on IDEAS

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    2. Jamali-Zghal, N. & Lacarrière, B. & Le Corre, O., 2015. "Metallurgical recycling processes: Sustainability ratios and environmental performance assessment," Resources, Conservation & Recycling, Elsevier, vol. 97(C), pages 66-75.
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