Precipitation Reaction Mechanisms of Mineral Deposits Simulated with a Fluid Mixing Model

Table 6

Dilution test data.

No.	Sample no.	Pb			Zn			Surrounding rock	Diluting fluid	Volume	pH0	pH1	pH2
		Test value (ppm)	Precipitation (ppm)	Precipitation rate (%)	Test value (ppm)	Precipitation (ppm)	Precipitation rate (%)
1	XS-1	49.4	60.1	54.9	327	391.0	54.5	—	Pure water	10 mL	1.81	—	2.48
2	XS-2	51.3	58.2	53.2	334	384.0	53.5	—	Pure water	20 mL	1.81	—	2.4
3	XS-3	50.7	58.8	53.7	327	391.0	54.5	—	2 mol/L NaCl	10 mL	1.81	—	2.19
4	XS-4	45.7	63.8	58.3	322	396.0	55.2	—	2 mol/L NaCl	20 mL	1.81	—	2.35
5	XS-5	34.0	75.5	68.9	325	393.0	54.7	Add dolomite for the night	Pure water	10 mL	1.81	5.3	5.71
6	XS-6	21.8	87.7	80.1	207	511.0	71.2	Add dolomite for the night	Pure water	20 mL	1.81	5.5	5.76
7	XS-7	35.5	74.0	67.6	322	396.0	55.2	Add dolomite for the night	2 mol/L NaCl	10 mL	1.81	5.45	6.18
8	XS-8	23.2	86.3	78.8	203	515.0	71.7	Add dolomite for the night	2 mol/L NaCl	20 mL	1.81	5.49	6.24
9	XS-9	44.6	64.9	59.3	338	380.0	52.9	Add dolomite for 10 min	Pure water	10 mL	1.81	1.81	4.15
10	XS-10	28.6	80.9	73.9	219	499.0	69.5	Add dolomite for 10 min	Pure water	20 mL	1.81	1.81	4.33
11	XS-11	45.9	63.6	58.1	326	392.0	54.6	Add dolomite for 10 min	2 mol/L NaCl	10 mL	1.81	1.81	4.24
12	XS-12	35.7	73.8	67.4	232	486	67.6	Add dolomite for 10 min	2 mol/L NaCl	20 mL	1.81	1.81	4.32
13	XS-13 (blank)	109.5	0.0	0.0	718	0.0	0.0	Blank	—	—	1.81	1.81	1.81
14	XS-14	69.1	40.4	36.9	644	74.0	10.3	Add dolomite for the night	—	—	1.81	1.81	5.4
15	XS-15	92.3	17.2	15.7	696	22.0	3.1	Add dolomite for 10 min	—	—	1.81	1.81	4.23