Sustainability of compacted clays as materials for municipal waste landfill liner.

Widomski, M. K., Stepniewski, W. and Horn, Rainer (2016) Sustainability of compacted clays as materials for municipal waste landfill liner. Rocznik Ochrona Srodowiska, 18 . pp. 439-454.

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Sustainability of waste management systems is crucial to allow ecological, economic and social sustainable development of not only the urbanized, municipal areas but also the rural ones (e.g. Udo & Pawłowski 2010, Guerrero et al. 2013, Pawłowski 2013, Bielińska et al. 2015, Leźnicki & Lewandowska 2016, Savić et al. 2016). Landfilling of wastes is the final stage of sustainable municipal waste management systems, no matter how developed it is (Allen 2000, Wagner 2011). Even in the developed countries of high economic incomes some small part of wastes, which cannot be processed by any other measures, is being landfilled (e.g. Pires et al. 2011, Shekdar 2013). Sustainable landfilling, according to Allen (2000) should allow safe disposal of waste inside a landfill, subsequent degradation of wastes, by the most financially efficient method available and with the minimal damage to the environment. The environmental impacts of landfills may cover contamination of surface water and groundwater by leachate, pollution of soil by direct contact with wastes or leachate percolation, air pollution by products of waste burning, spreading of diseases and bad odors in landfill area, as well as uncontrolled release of methane by anaerobic decomposition of deposited wastes (e.g. Ngoc & Schintzer 2009). Water inflows and outflows should be permanently prevented by the top and bottom landfill sealing liners, commonly constructed of natural materials of appropriate permeability and often additionally supported by plastic or geosynthetic membranes
440 Marcin K. Widomski, Witold Stępniewski, Rainer Horn
(Bagchi 1990, Simon & Müller 2004, Laner et al. 2012). Although geosyntetic clay liners, geomembranes, geonets, and geotextiles, often used for the construction of liners in developed countries, they may not guarantee a long-term impermeability, and may be more expensive. (e.g. Zhang et al. 2010, Pires et al. 2011, Guerrero et al. 2013). Thus, compacted clay liners are still a worthy option. However, sustainability of clay liners may be significantly affected by their long-term sealing capabilities, resulting from the hydraulic conductivity after compaction, swell-shrinkage characteristics, resistance to cyclic drying and rewetting and desiccation cracking (e.g. Allen 2000). There are still unanswered questions regarding the influence of most important hydraulic and geotechnical properties of clayey soils and sustainability of compacted clay liners. The performed studies concerning properties of clays influencing the sustainability of compacted clay liner covered measurements of saturated hydraulic conductivity and swell-shrink characteristics, and geotechnical properties of two selected clay materials.

Document Type: Article
Additional Information: Times Cited: 0 Widomski, Marcin K. Stepniewski, Witold Horn, Rainer 2
Keywords: sustainable development, compacted clay liner, landfilling, hydraulic conductivity, swell and shrink properties
Research affiliation: Kiel University
Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
ISSN: 1506-218X
Projects: Future Ocean
Date Deposited: 18 Mar 2017 11:52
Last Modified: 23 Sep 2019 19:54

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