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http://dx.doi.org/10.4491/KSEE.2011.33.4.267

Assessment of Environmental Impacts and $CO_2$ Emissions from Soil Remediation Technologies using Life Cycle Assessment - Case Studies on SVE and Biopile Systems -  

Jeong, Seung-Woo (Department of Environmental Engineering, Kunsan National University)
Suh, Sang-Won (Bren School of Environmental Science and Management, University of California-Santa Barbara)
Publication Information
Journal of Korean Society of Environmental Engineers / v.33, no.4, 2011 , pp. 267-274 More about this Journal
Abstract
The environmental impacts of 95% remediation of a total petroleum hydrocarbon-contaminated soil were evaluated using life cycle assessment (LCA). LCA of two remediation systems, soil vapor extraction (SVE) and biopile, were conducted by using imput materials and energy listed in a remedial system standardization report. Life cycle impact assessment (LCIA) results showed that the environmental impacts of SVE were all higher than those of biopile. Prominent four environmental impacts, human toxicity via soil, aquatic ecotoxicity, human toxicity via surface water and human toxicity via air, were apparently found from the LCIA results of the both remedial systems. Human toxicity via soil was the prominent impact of SVE, while aquatic ecotoxicity was the prominent impact of biopile. This study also showed that the operation stage and the activated carbon replacement stage contributed 60% and 36% of the environmental impacts of SVE system, respectively. The major input affecting the environmental impact of SVE was electricity. The operation stage of biopile resulted in the highest contribution to the entire environmental impact. The key input affecting the environmental impact of biopile was also electricity. This study suggested that electricity reduction strategies would be tried in the contaminated-soil remediation sites for archieving less environmental impacts. Remediation of contaminated soil normally takes long time and thus requires a great deal of material and energy. More extensive life cycle researches on remedial systems are required to meet recent national challenges toward carbon dioxide reduction and green growth. Furthermore, systematic information on electricity use of remedial systems should be collected for the reliable assessment of environmental impacts and carbon dioxide emissions during soil remediation.
Keywords
LCA; Carbon Dioxide; Environmental Impact; Remediation; Soil Contamination;
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