Abstract
Since Japan does not have enough space for landfilling, the use of incineration bottom ash (IBA) from municipal solid waste (MSW) as a construction material is being explored. However IBA contains significant toxic materials, and it has to be immobilized before it can be used as a ground geo-material. This study examines aging methods to immobilize IBA by natural rain and carbon dioxide in the air at landfill sites. This paper reports the leaching properties of IBA from MSW in order to evaluate the environmental safety by means of Japanese leaching test No. 46 (Notifications No. 46 by Japanese Ministry of the Environment (JLT 46)), up-flow percolation column test, and pH-dependent test. The leaching concentrations of heavy metals from IBA were found to be influenced by the aging process. It was revealed that the concentration of lead (Pb), hexavalent chromium (Cr (VI)), cadmium (Cd) and boron (B) meet the environmental quality standard values for ground material. Also it was revealed that the possibility of leaching in the long term is low.
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References
ISO/TS 21268-3 (2007) Soil quality-Leaching procedures for subsequent chemical and eco toxicological testing of soil and soil materials, Part 3: up-flow percolation test
Ueda T, Naruoka T, Mongi H, Sakanakura H, Nawada D, Inoue H (2015) Aging of incineration bottom ash in the yard installed to the existing final disposal site (2). In: The 26th annual conference of Japan society of material cycles and waste management, vol 26, pp 203–204 (in Japanese)
Sakanakura H, Osako M (2007) Systematic standardization of evaluation methods for environmental safety quality of recycled products in construction sites: setting standards for the Japan society of waste management experts 18(6):321–329 (in Japanese)
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Fujikawa, T., Sato, K., Koga, C., Sakanakura, H. (2019). Evaluation of Environmental Safety on Municipal Solid Waste Incineration Bottom Ash Using Aging Method. In: Zhan, L., Chen, Y., Bouazza, A. (eds) Proceedings of the 8th International Congress on Environmental Geotechnics Volume 1. ICEG 2018. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-2221-1_31
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DOI: https://doi.org/10.1007/978-981-13-2221-1_31
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