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

Reyes, Iván A.; Mireles, Ister; Patiño, Francisco; Pandiyan, Thangarasu; Flores, Mizraim U.; Palacios, Elia G.; Gutiérrez, Emmanuel J.; Reyes, Martín

doi:10.1186/s12932-016-0035-7

Geochemical Transactions

Table 3 Conditions and calculation results of the dissolution experiments of KFe₃[(SO₄)_2 − X(CrO₄)_X](OH)₆ in OH⁻ medium

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

[NaOH]/mol L⁻¹	pH	T/K	CrO₄/mol^a	[OH⁻]/mol L⁻¹	d₀/µm^b	t_ind/min	k_exp/min ⁻¹	t_r/min
0.100	12.29	323.15	0.77	0.1023	38	0.7	0.5929	2.5
0.050	12.14	323.15	0.77	0.0724	38	1.6	0.2138	4.5
0.030	11.81	323.15	0.77	0.0339	38	3.2	0.1284	10.0
0.010	11.49	323.15	0.77	0.0162	38	6.8	0.0597	20.0
0.006	11.14	323.15	0.77	0.0072	38	16.5	0.0346	30.0
0.001	10.37	323.15	0.77	0.0012	38	75.0	0.0197	115.0
0.300	13.36	303.15	0.77	0.3342	38	0.86	0.2735	4.0
0.200	13.15	303.15	0.77	0.2061	38	1.69	0.1474	5.0
0.100	12.94	303.15	0.77	0.1271	38	3.18	0.0962	16.0
0.050	12.45	303.15	0.77	0.0397	38	8.63	0.0397	30.0
0.025	12.18	303.15	0.77	0.0221	38	19.04	0.0207	50.0
0.010	11.88	303.15	0.77	0.0111	38	55.2	0.0082	160.0
0.007	11.67	303.15	0.77	0.0065	38	137.49	0.0051	280.0
0.003	11.38	303.15	0.77	0.0035	38	253.74	0.0038	420.0
0.001	10.79	303.15	0.77	0.0009	38	1342.41	0.0011	2100.0
0.050	12.88	293.15	0.77	0.05200	38	26.0	0.0200	70.0
0.050	12.62	298.15	0.77	0.04200	38	12.5	0.0251	40.0
0.050	12.18	308.15	0.77	0.03100	38	4.4	0.0455	18.0
0.050	12.04	313.15	0.77	0.03100	38	3.5	0.0791	14.0
0.050	11.92	318.15	0.77	0.03300	38	2.0	0.1464	10.0
0.050	11.87	323.15	0.77	0.03900	38	1.7	0.1881	7.0
0.050	11.51	328.15	0.77	0.02300	38	0.8	0.2103	3.7
0.050	11.39	333.15	0.77	0.02300	38	0.4	0.3248	2.8
0.050	11.04	343.15	0.77	0.01700	38	0.1	0.5794	2.3
0.010	11.88	303.15	0.77	0.01096	38	58.0	0.0082	160.0
0.010	11.79	313.15	0.77	0.01778	38	20.1	0.0299	51.0
0.010	11.34	323.15	0.77	0.01148	38	9.1	0.0484	24.0
0.010	10.91	333.15	0.77	0.00759	38	3.1	0.0705	16.0
0.010	10.68	343.15	0.77	0.00741	38	1.3	0.1752	5.0
0.050	12.53	303.15	0.77	0.049	75	7.5	0.02	24.0
0.050	12.54	303.15	0.77	0.050	53	9.81	0.0311	27.0
0.050	12.55	303.15	0.77	0.051	44	8.63	0.034	25.0
0.050	12.53	303.15	0.77	0.049	38	9.3	0.0397	30.0
0.050	12.52	303.15	0.77	0.048	25	9.1	0.0632	28.0
0.050	12.54	303.15	1.99	0.0500	38	6.9	0.0373	27.0
0.050	12.68	303.15	1.57	0.0555	38	2.3	0.0358	25.0
0.050	12.68	303.15	1.02	0.0555	38	2.8	0.0373	25.0
0.050	12.45	303.15	0.77	0.0411	38	8.6	0.0397	30.0
0.050	12.53	303.15	0.12	0.049	38	4.2	0.0369	24.0
0.050	12.48	303.15	0.09	0.0555	38	6.9	0.0367	27.0
0.050	12.69	303.15	0.00	0.0568	38	4.3	0.0392	25.0

^aSO₄ ²⁻ + CrO₄ ²⁻ = 2
^bMesh diameter

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ISSN: 1467-4866

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