Table 3.

Concentrations of Hg for leachates of mine waste samples

Sample	Description	Mine waste Hg (μg/g)	Unfiltered μg Hg leached/g sample	0.7 nm μg Hg leached/g sample	0.45 μm μg Hg leached/g sample	0.2 μm μg Hg leached/g sample
Mar1rt	Mariposa mine, retort	170	7.0	1.4	1.3	0.23
Mar2	Mariposa mine, calcine	190	1.1	0.098	0.10	0.11
Mar3	Mariposa mine, calcine	35	0.15	0.012	0.006	0.005
Mar4	Mariposa mine, calcine	25	0.81	0.012	0.012	0.012
Mar5	Mariposa mine, calcine	13	0.13	0.005	0.011	0.006
Ter1rt	Terlingua mine, retort	19,000	760	16	16	20
Ter2	Terlingua mine, calcine	14	0.040	0.015	0.021	0.020
Ter3	Terlingua mine, calcine	16	0.12	0.005	0.005	0.006
Ter4	Terlingua mine, calcine	170	0.030	0.002	0.002	<0.001
Ter5	Terlingua mine, calcine	4.1	0.040	0.003	0.002	<0.001
MSM1	Mariscal mine, calcine	6.9	0.046	<0.001	<0.001	<0.001
MSM2	Mariscal mine, calcine	31	0.040	<0.001	<0.001	0.002
MSM3	Mariscal mine, calcine	44	0.31	<0.001	<0.001	<0.001
MSM4	Mariscal mine, calcine	110	0.66	<0.001	<0.001	<0.001
MSM5	Mariscal mine, calcine	150	0.62	<0.001	<0.001	<0.001
SB1rt	Study Butte mine, retort	5,900	24	2.4	2.0	1.5
SB2	Study Butte mine, calcine	12	0.13	0.006	0.006	0.007
SB3	Study Butte mine, calcine	480	0.61	0.002	<0.001	<0.001
SB4	Study Butte mine, congener soot	3,000	6.6	0.048	0.009	0.007
SB5	Study Butte mine, calcine	35	1.2	0.002	0.002	0.002

Sample numbers correspond to those shown in Fig. 1