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Table 2 Conditions and calculation results of the dissolution experiments of KFe3[(SO4)2 − X(CrO4)X](OH)6 in medium H3O+, tr is the total reaction time of each experiment (until steady state is obtained)

From: A study on the dissolution rates of K-Cr(VI)-jarosites: kinetic analysis and implications

[HCl]/mol L−1 pH T/K CrO4/mola [H3O+]/mol L−1 d0/µmb tind/min kexp/min −1 tr/min
0.50 0.28 323.15 0.77 0.5248 38 5.50 0.01070 50
0.30 0.50 323.15 0.77 0.3162 38 18.44 0.00830 130
0.10 0.95 323.15 0.77 0.1122 38 29.88 0.00177 420
0.07 1.13 323.15 0.77 0.0741 38 34.06 0.00097 520
0.04 1.42 323.15 0.77 0.0380 38 53.50 0.00048 750
0.01 2.01 323.15 0.77 0.0098 38 84.47 0.00010 1800
0.50 0.30 303.15 0.77 0.5012 38 75.70 0.00191 390
0.30 0.51 303.15 0.77 0.3090 38 148.58 0.00067 1320
0.10 0.99 303.15 0.77 0.1023 38 458.77 0.00027 2340
0.06 1.22 303.15 0.77 0.0603 38 1033.32 0.00015 10320
0.02 1.69 303.15 0.77 0.0204 38 2740.02 0.00005 13500
0.30 0.55 298.15 0.77 0.2818 38 191.25 0.0004 2280
0.30 0.55 308.15 0.77 0.2818 38 66.27 0.0011 1000
0.30 0.54 313.15 0.77 0.2884 38 36.58 0.0019 750
0.30 0.54 318.15 0.77 0.2884 38 19.00 0.0030 285
0.30 0.53 323.15 0.77 0.2951 38 8.69 0.0048 120
0.30 0.52 333.15 0.77 0.3020 38 2.52 0.0083 47
0.30 0.51 338.15 0.77 0.3090 38 1.41 0.0162 40
0.30 0.50 343.15 0.77 0.3162 38 0.61 0.0210 35
0.30 0.49 353.15 0.77 0.3236 38 0.25 0.0326 30
0.50 0.33 303.15 0.77 0.468 38 109.80 0.00193 390
0.50 0.31 313.15 0.77 0.490 38 29.56 0.00407 150
0.50 0.27 323.15 0.77 0.537 38 7.24 0.0143 50
0.50 0.25 333.15 0.77 0.562 38 1.98 0.0223 30
0.50 0.22 343.15 0.77 0.603 38 0.54 0.0651 12
0.50 0.21 353.15 0.77 0.617 38 0.21 0.1173 8
0.30 0.52 303.15 0.77 0.3020 25 18.13 0.0083 130
0.30 0.52 303.15 0.77 0.3020 38 18.44 0.0056 130
0.30 0.53 303.15 0.77 0.2951 44 20.83 0.0048 130
0.30 0.53 303.15 0.77 0.2951 53 17.64 0.0039 130
0.30 0.53 303.15 0.77 0.2951 75 15.21 0.0028 130
0.30 0.52 303.15 1.99 0.3020 38 5.61 0.0060 165
0.30 0.52 303.15 1.57 0.3020 38 5.23 0.0059 165
0.30 0.53 303.15 1.02 0.2951 38 5.70 0.0059 160
0.30 0.52 303.15 0.77 0.3020 38 4.94 0.0056 160
0.30 0.53 303.15 0.12 0.2951 38 6.04 0.0058 165
0.30 0.53 303.15 0.09 0.2951 38 8.56 0.0059 165
0.30 0.52 303.15 0.00 0.3020 38 6.58 0.0059 160
  1. Italic data indicates conditions and results with change in the controlling stage (or resistance), passing from a process controlled by the chemical reaction to a process controlled by the mass transport in the ash layer
  2. aSO4 2− + CrO4 2− = 2
  3. bMesh diameter
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Geochemical Transactions

ISSN: 1467-4866

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