2009-05-19_REVISION - M1977416

• Permit No: M1977416
• IBM Index Class Name: REVISION
• Doc Date: 5/19/2009
• Doc Name: EPP ‎(AM-01)‎ Attachment 3: Soil Adsorption ‎(part 3)‎
• From: Denison Mines
• To: DRMS
• Type & Sequence: AM1
• Email Name: RCO
• Media Type: D
• Archive: No

Section 3
Results
0
Table 3-A Antimonv Adsorption
--------------

Development
Rock ----- ----

Ratio -- -----

Soil Mass
Solution
Volume
(ml-)
Leachate Initial
Concentration
m /L *
Leachate Final
Concentration
m L *

x/m
(mg/kg)
4 250.7 999.9 0.05 0.05 0.00
10 100.4 1003.1 0.05 0.05 0.00
20 50.7 1001.9 0.05 0.05 0.00
40 20.8 764.8 0.05 0.05 0.00
V4WR4 60 13.1 753.1 0.05 0.05 0.00
4 253.1 991.4 0.05 0.05 0.00
10 102.6 1003.2 0.05 0.05 0.00
20 51.3 994.6 0.05 0.05 0.00
40 12.9 538.2 0.05 0.05 0.00
WSWR3 60 8.2 515.2 0.05 0.05 0.00
4 251.4 1013.3 0.05 0.05 0.00
10 100 1004.5 0.05 0.05 0.00
20 50.2 1001.2 0.05 0.05 0.00
40 22.7 899.8 0.05 0.05 0.00
SJWR3 60 15.5 902.6 0.05 0.05 0.00
4 251.1 992.5 0.05 0.05 0.00
10 103 1015.3 0.05 0.05 0.00
20 52.1 997 0.05 0.05 0.00
40 20.1 751.8 0.05 0.05 0.00
TPWR3 60 13.4 753.2 0.05 0.05 0.00
10 104.3 987.2 0.05 0.05 0.00
20 50.3 997.8 0.05 0.05 0.00
40 26.2 984.2 0.05 0.05 0.00
SVWR2 60 12.2 75203 0.05 0.05 0.00
• * Result is the detection limit (samples are all not detected)
3.2 Attenuation Factor Estimates
This section presents the development of attenuation factors including construction of
isotherms and partition coefficients and estimate of retardation factors.
The data in Tables 3-1 through 3-6 were used to construct isotherms (plots of x/ m vs
Cflnal), which are presented in Figures 3-1 through 3-20. Most of the isotherms were
linear, which means that adsorption was likely the controlling attenuation
mechanism. The fact that the curved Langmuir Isotherms discussed in the element
descriptions (see Appendix A) were not obtained is a result of the solutions (e.g.,
generated leachate) not containing high enough concentrations to completely saturate
the soils (i.e., to reach the adsorption capacity where the isotherm flattens out). The
interpretation of each of the isotherm plots is presented in Table 3-7. As discussed
previously, the slopes of the linear portion of the isotherm curves were used to
estimate the partition coefficient (Kd).
•
cm 3-4
7:164986-Denison Mineffask Order 3 - DMO Sampling and Analysis Plan\Task 3.12 - Soil, Ore, Rock Data Assessment Reporlt.Sunday Rock ReponWOechmentMAMnuation Report working draft 040309.doo