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Title: Geopolymers as candidates for low/intermediate level highly alkaline waste.
Authors: Perera, DS
Vance, ER
Kiyama, S
Aly, Z
Yee, P
Keywords: Polymers
Wastes
Alkaline Hydrolysis
Materials
Radioactive Waste Management
Radioactive Wastes
Issue Date: 27-Nov-2006
Publisher: Materials Research Society
Citation: Perera, D., Vance, E., Kiyama, S., Aly, Z., & Yee, P. (2007). Geopolymers as candidates for low/intermediate level highly alkaline waste. 30th International Symposium on the Scientific Basis for Nuclear Waste Management (2006 MRS Fall Meeting), 27th November – 1st December 2006. Boston, Massachusetts, United States of America: Hynes Convention Center. In D.S. Dunn, C. Poinssot, B. Begg (Eds.), Scientific Basis for Nuclear Waste Management XXX, 985 (Symposium NN), 361-6(0985-NN10-01).
Abstract: Geopolymers should be serious waste form candidates for intermediate level waste (ILW), insofar as they are more durable than Portland cement and can pass the PCT-B test for high-level waste. Thus an alkaline ILW could be considered to be satisfactorily immobilised in a geopolymer formulation. However a simulated Hanford tank waste was found to fail the PCT-B criterion even for a waste loading as low as 5 wt%, very probably due to the formation of a soluble sodium phosphate compound(s). This suggests that it could be worth developing a ìmixedî GP waste form in which the amorphous material can immobilise cations and a zeolitic component to immobilise anions. The PCTñB test is demonstrably subject to significant saturation effects, especially for relatively soluble waste forms.
URI: http://apo.ansto.gov.au/dspace/handle/10238/1260
http://www.mrs.org/s_mrs/bin.asp?CID=7392&DID=196984&DOC=FILE.PDF
ISBN: 9781558999428
ISSN: 0272-9172
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