TY - JOUR
T1 - Thermodynamics of liquid-liquid distribution reactions-III The U(VI), Nd(III) or Ho(III) nitrate-water-di(2-ethylhexyl) phosphoric acid-hydrocarbon diluent extraction system
AU - Marcus, Y.
AU - Kolařík, Z.
PY - 1976
Y1 - 1976
N2 - The heat effect of the extraction of uranium(VI), neodymium(III) and holmium(III) from dilute aqueous nitrate solutions with di(2-ethylhexyl) phosphoric acid (HA) in dodecane was measured. The thermodynamic functions for the extraction reaction UO2 2+ + 2(HA)2 = UO2(HA2)2+2H were calculated for the standard state of infinite dilution of all solutes in water and dodecane as ΔH* = - 30 kJ mol-1, Δ°G* = -32 kJ mol-1 and Δ°S* = 7 J K-1 mol-1 at 25°C. The ΔH* values of the extraction reactions Ln3++3(HA)2=Ln(HA2)3+3H +(Ln=Ho and Nd) are too low as to be measured reliably by the method used, but appear to tend to zero on approaching the standard state.
AB - The heat effect of the extraction of uranium(VI), neodymium(III) and holmium(III) from dilute aqueous nitrate solutions with di(2-ethylhexyl) phosphoric acid (HA) in dodecane was measured. The thermodynamic functions for the extraction reaction UO2 2+ + 2(HA)2 = UO2(HA2)2+2H were calculated for the standard state of infinite dilution of all solutes in water and dodecane as ΔH* = - 30 kJ mol-1, Δ°G* = -32 kJ mol-1 and Δ°S* = 7 J K-1 mol-1 at 25°C. The ΔH* values of the extraction reactions Ln3++3(HA)2=Ln(HA2)3+3H +(Ln=Ho and Nd) are too low as to be measured reliably by the method used, but appear to tend to zero on approaching the standard state.
UR - http://www.scopus.com/inward/record.url?scp=33847681555&partnerID=8YFLogxK
U2 - 10.1016/0022-1902(76)80032-2
DO - 10.1016/0022-1902(76)80032-2
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AN - SCOPUS:33847681555
SN - 0022-1902
VL - 38
SP - 1069
EP - 1074
JO - Journal of Inorganic and Nuclear Chemistry
JF - Journal of Inorganic and Nuclear Chemistry
IS - 5
ER -