TY - GEN
T1 - Measurement of initial dissolution rate of P0798 simulated HLW glass by using micro-reactor flow-through test method
AU - Makigaki, H.
AU - Inagaki, Y.
AU - Idemitsu, K.
AU - Arima, T.
AU - Mitsui, S.
AU - Banba, T.
AU - Noshita, K.
PY - 2009
Y1 - 2009
N2 - We applied a new type of flow-through test method using micro-reactor consisting of a simple test apparatus with compact size to measurement of the dissolution rate of a Japanese type of simulated waste glass (P0798 glass). In this test method, a solution flows through a microchannel (20 mm length, 2 mm width, 0.16 mm depth) in contact with a face of coupon shaped glass specimen, and the output solution is retrieved at certain intervals to be analyzed for determination of the glass dissolution rate. By using this test method the initial dissolution rate of glass matrix or forward dissolution rate was measured as a function of pH (3 to 11) and temperature (25°C to 90°C). The present test results indicated that the initial dissolution rate has 'V-shaped' pH dependence, and the effect of pH on the dissolution rate decreases with increase in temperature similar to the results measured by using the Single-pass flow-through (SPFT) method. The present test results also indicated that the dissolution of B is controlled by diffusion process and that of Si is controlled by surface reaction process.
AB - We applied a new type of flow-through test method using micro-reactor consisting of a simple test apparatus with compact size to measurement of the dissolution rate of a Japanese type of simulated waste glass (P0798 glass). In this test method, a solution flows through a microchannel (20 mm length, 2 mm width, 0.16 mm depth) in contact with a face of coupon shaped glass specimen, and the output solution is retrieved at certain intervals to be analyzed for determination of the glass dissolution rate. By using this test method the initial dissolution rate of glass matrix or forward dissolution rate was measured as a function of pH (3 to 11) and temperature (25°C to 90°C). The present test results indicated that the initial dissolution rate has 'V-shaped' pH dependence, and the effect of pH on the dissolution rate decreases with increase in temperature similar to the results measured by using the Single-pass flow-through (SPFT) method. The present test results also indicated that the dissolution of B is controlled by diffusion process and that of Si is controlled by surface reaction process.
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U2 - 10.1557/proc-1193-307
DO - 10.1557/proc-1193-307
M3 - Conference contribution
AN - SCOPUS:77951684811
SN - 9781605111667
T3 - Materials Research Society Symposium Proceedings
SP - 307
EP - 314
BT - Scientific Basis for Nuclear Waste Management XXXIII
PB - Materials Research Society
T2 - 32nd Symposium on Scientific Basis for Nuclear Waste Management
Y2 - 24 May 2009 through 29 May 2009
ER -