TABLE 1.
Physicochemical parameters from weathered rock (W) and sediment (S) of Heshang Cave
| Weathered rock (W)a | Sediment (S)a | |
|---|---|---|
| pH | 7.79 ± 0.22 b | 8.09 ± 0.20 a |
| TOC (%) | 1.00 ± 0.82 a | 0.39 ± 0.20 b |
| Ca2+ (mM) | 4.30 ± 5.68 a | 1.99 ± 1.93 b |
| Mg2+ (mM) | 8.97 ± 18.24 a | 3.74 ± 4.44 a |
| K+ (mM) | 0.99 ± 0.98 a | 0.20 ± 0.13 b |
| Na+ (mM) | 0.50 ± 0.62 a | 0.51 ± 0.63 a |
| NH4+ (mM) | 0.44 ± 0.48 a | 0.06 ± 0.10 b |
| Cl− (mM) | 1.41 ± 1.30 a | 1.40 ± 2.02 a |
| NO2− (mM) | 2.25 ± 3.79 a | 0.37 ± 0.74 a |
| NO3− (mM) | 6.44 ± 9.14 a | 3.62 ± 4.80 a |
| SO42− (mM) | 10.47 ± 17.65 a | 0.98 ± 1.50 a |
a
Values are mean ± standard error. Different small letters within the same row indicate a significant difference at the level of 0.05. The bold formatting indicates a significant difference between W and S.