Circular Waste Management: Returning End-of-Life Products Back to the Economy

A special issue of Resources (ISSN 2079-9276).

Deadline for manuscript submissions: closed (31 December 2019) | Viewed by 5363

Special Issue Editor

MARE, Department of Environmental Sciences and Engineering, NOVA School of Sciences and Technology, Universidade NOVA de Lisboa, Portugal
Interests: sustainable waste management and circular economy; multicriteria decision making; sustainability metrics and indicators; policies instruments; life cycle assessment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The waste generated in the entire world is rising both in its amount and its hazardousness, and the demand for raw materials is higher than ever. The scarcity of resources has led the industry to look to solid waste as the new source of materials. Integrated solid waste management has been helpful in establishing economies of scale and reaching processes efficiencies for the waste treatment processes working alone. Such a linear process, however, cannot adequately respond to the new challenges imposed by the circular economy approach and sustainable development goals set by the United Nations. Circular waste management, defined by Loher and Ward (1987), includes approaches such as recovery or reuse, being in line with the fundamental ecological principle that all materials should be returned to the cycle from which they were generated, with advantages to the potential reduction of cross-media transfer of contaminants. Circular waste management needs to be updated to be capable of meeting the current challenges: Making the use of products more efficient and bringing end-of-life products to the economy in a sustainable way. Understanding which should be the best way to promote circular waste management requires the application of systems analysis tools, such as life cycle assessment, cost–benefit analysis, multicriteria decision making, operation research methods, including reverse logistics, ecodesign tools, material flow analysis, just to name a few. It is therefore important to encourage a new paradigm of waste management, where the materials loops are closed and waste generated is minimized (together with its impact). This Special Issue intends to draw together the current progress in circular waste management with a sustainable background.

Loher, R.C., Ward, C.H. 1987. Waste treatment processes and cross-media transfer of pollutants. In: Multimedia Approaches to Pollution Control: A Symposium Proceedings. National Academy Press, Washington, pp. 8-23.

Dr. Ana Pires
Guest Editor

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  • Prevention of waste
  • Reuse challenges
  • Reverse logistics, end-of-life products collection, and waste collection
  • Recycling challenges
  • Policy instruments
  • Circular economy and waste hierarchy principle
  • Environmental impacts (including climate change, marine litter)
  • Economic impacts
  • Social impacts (including recycling behavior, consumption behavior)
  • Waste streams case studies

Published Papers (1 paper)

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14 pages, 2639 KiB  
Effect of Recycled Plastic Granules as a Partial Substitute for Natural Resource Sand on the Durability of SCC
by Bala Rama Krishna Chunchu and Jagadeesh Putta
Resources 2019, 8(3), 133; - 27 Jul 2019
Cited by 15 | Viewed by 4974
This investigation is focused on durability studies of binary blended self-compacting concrete (SCC) with the replacement effect of electronic plastic waste, namely high-impact polystyrene (HIPS) granules as partial sand. In the current investigation, for all the SCC mixes, cement is replaced with pozzolanic [...] Read more.
This investigation is focused on durability studies of binary blended self-compacting concrete (SCC) with the replacement effect of electronic plastic waste, namely high-impact polystyrene (HIPS) granules as partial sand. In the current investigation, for all the SCC mixes, cement is replaced with pozzolanic material fly ash in the binder content of 497 kg/m3 and an adopted water-to-binder ratio of 0.36. Durability properties such as porosity, water absorption, and sorptivity are assessed for the curing periods of 28 and 90 days on SCC specimens produced with HIPS (0%–40% replacement by volume of sand). Both surface and internal water absorption rates were found to be minimal for SCC with HIPS. Replacement of HIPS up to 30% in SCC exhibited improved trends for all tests results. Reported durability parameter values were within permissible limits and revealed the excellent performance of HIPS in SCC. The optimum durability values can be attributed to the dense microstructure of SCC obtained with the combined effect of HIPS and fly ash. The continuous gradation of aggregates in the matrix reduced porosity due to the spherical shape of HIPS; additionally, the hydrophobicity of HIPS inhibits moisture migration in SCC. The additional benefits of fly ash, such as pozzolanic action and the filler effect at the interfacial transition zone (ITZ) are also major contributions to the long-term performance of durability. Electronic plastic waste replacement for fine aggregates in concrete compensates for the disposal problem and conserves natural sand. Full article
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