Recent Progress in Chemically Bonded Phosphate Ceramics

Table 7

Results of leaching results.

Contaminants		H-1	H-2	M-1	M-2
ANS 16.1 90-day immersion test for radioactive contaminants [65]
Actinides
^237Np		12.8	13.6
^239Pu		13.5	14.4		Total alpha = 12.9
^241Am			14.6
Fission products
^90Sr		10.9	13.2	11.1
^137Cs		11.4	11.5	13.0
^99Tc		9.9	10
^231I		11.2		7.9
^75Se		9.6
PCT 7-day immersion test at 90°C for product constituents (g/m^2·day as normalized leaching rate [66])
Mg		4.1𝐸−6	7.1𝐸−7	6.6𝐸−5	1.6𝐸−5
K		1.9𝐸−2	1.1𝐸−2	2.4𝐸−2	2.4𝐸−2
PO4		6.3𝐸−3	1.8𝐸−3	7.2𝐸−3	9.5𝐸−3
Na		1.7𝐸−2	9.3𝐸−3	2.4𝐸−2	2.1𝐸−2
Toxicity characteristic leaching procedure for hazardous elements (ppm) [66]
Element	Reg. limit
Pb	0.75	0.005	0.004		0.08
Cr	0.6	0.04	0.006	0.2
Cd	0.11	0.001	0.008
Ni	11.0		<0.1	0.5	0.7