A Review of Geosynthetic Liner System Technology

Abstract

This paper presents a general review of geosynthetic liner systems design considerations. The paper emphasizes the fundamental differences between a liner and a liner system, discusses the types of liner systems that are effective in landfill applications, and discusses how the components of a liner system may vary depending on the type of application, regulatory requirements, site hydrogeologic and climatic conditions, and the availability of materials. Regarding regulatory considerations, the paper discusses how liner systems must be selected and designed in conformance with regulatory performance standards in order to ensure long-term protection of the environment, and notes that many American state regulations for municipal waste landfills include minimum design guidelines that may be inadequate to meet the state's performance standards. The two aspects of chemical compatibility—retention and resistance to chemical attack—are discussed, and a generalized approach to designing geosynthetic liner systems is presented. The paper concludes with a discussion on future needs of the discipline and the industry.

Molecular migration of low sorbing organic liquids into polymeric geomembranes

“…Leachates are a complex mixture of many different components and it would be dif®cult to predict their compositions. 26 However, simple liquid migration is attributed to the main organic constituent of the leachate mixture. 27 Hence, we decided to obtain some useful data on the migration of pure organics with HDPE, VLDPE, LLDPE and PP geomembranes.…”