Table 2.
Properties of aquifer materials. Surface area was measured in our laboratory while the other properties were analyzed by the Analytical Laboratory at the University of California, Davis. Details on the analytical protocols are available at http://anlab.ucdavis.edu/analyses/soil/
| Soil ID | Sand (wt. %) | Silt (wt. %) | Clay (wt. %) | pH | pHava | BET surface areab (m2/g) | Total Fe (mg/kg) | Total Mn (mg/kg) | Fe-CBD (mg/kg) | Mn-CBD (mg/kg) | TC (%) | TOC (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CADIR | 80 | 16 | 4 | 8.4 | 8.4 | 4.7 | 9600 | 96 | 2460 | 28 | 0.22 | 0.1 |
| CADOU | 84 | 10 | 6 | 9.2 | 8.7 | 3.9 | 7700 | 106 | 3020 | 54 | 0.32 | 0.2 |
| CADMS | 90 | 5 | 5 | 8.8 | 8.5 | 3.2 | 6840 | 90 | 2400 | 44 | 0.23 | 0.11 |
| CAROL | 63 | 18 | 19 | 7.6 | 8.2 | 39.8 | 24880 | 156 | 4800 | 76 | 0.08 | 0.08 |
| AWBPH | 82 | 10 | 8 | 7.8 | 8.5 | 14.3 | 16700 | 287 | 8010 | 191 | 0.03* | 0.04* |
| AFTCS | 60 | 22 | 18 | 7.7 | 8.3 | 27.7 | 14400 | 321 | 4470 | 185 | 0.36 | 0.05 |
| AMTAL | 64 | 22 | 14 | 7.2 | 8.2 | 16.2 | 18490 | 1162 | 10500 | 943 | 0.04* | 0.06* |
| WYSAN | 86 | 8 | 6 | 7.8 | 8.5 | 9.0 | 11500 | 193 | 4170 | 142 | 0.19 | 0.04 |
| WYLAM | 42 | 32 | 26 | 7.7 | 8.3 | 34.6 | 13900 | 294 | 2580 | 189 | 0.34 | 0.04 |
| KENTK | 87 | 5 | 8 | 4.6 | 7.2 | 5.1 | 12400 | 67 | 10950 | 57 | 0.02* | 0.05* |
*
TOC (Total Organic Carbon) was greater than TC (Total Carbon) because these values were within the uncertainty range of the analysis methods.
a
The average pH of the solution during the course of phenol degradation experiment. Solutions were buffered with 10 mM borate and the initial pH was 8.5.
b
BET surface area was measured in duplicate, and the average results are reported.