Table 3 EF values of seldom monitored trace elements in surface sediments of the Three Gorges Reservoir during summer (July) and winter (November).
Sampling sites | Li | Be | B | V | Ni | Ga | Sn | Sb | Tl | Bi |
---|---|---|---|---|---|---|---|---|---|---|
Summer (July) | ||||||||||
 ZY-1 | 1.98 | 1.29 | 2.41 | 1.14 | 1.08 | 1.54 | 0.90 | 7.34 | 1.44 | 1.13 |
 ZY-2 | 1.56 | 1.43 | 1.75 | 1.25 | 1.27 | 1.64 | 0.90 | 4.71 | 1.22 | 1.20 |
 ZY-3 | 1.03 | 1.24 | 0.89 | 1.25 | 1.23 | 1.82 | 0.86 | 4.86 | 1.12 | 1.37 |
 MX-1 | 1.36 | 1.49 | 1.52 | 1.24 | 1.24 | 2.11 | 0.88 | 8.98 | 1.37 | 1.04 |
 MX-2 | 1.66 | 1.58 | 1.61 | 1.50 | 1.38 | 2.20 | 1.06 | 6.74 | 1.76 | 1.23 |
 MX-3 | 1.30 | 1.37 | 1.00 | 1.60 | 1.37 | 2.64 | 0.94 | 6.28 | 1.60 | 1.04 |
 MX-4 | 1.37 | 1.38 | 1.38 | 1.28 | 1.31 | 1.98 | 0.92 | 6.18 | 1.42 | 1.10 |
 MX-5 | 1.17 | 1.22 | 1.14 | 1.16 | 1.23 | 1.88 | 0.88 | 8.37 | 1.18 | 1.41 |
 CJ | 1.00 | 1.12 | 0.95 | 1.18 | 1.26 | 1.87 | 0.80 | 6.61 | 1.12 | 1.17 |
 CT-1 | 1.28 | 1.59 | 2.30 | 1.37 | 1.27 | 2.25 | 1.02 | 4.78 | 1.65 | 1.28 |
 CT-2 | 1.20 | 1.35 | 1.05 | 1.64 | 1.36 | 2.89 | 0.95 | 4.22 | 1.60 | 1.05 |
 CT-3 | 1.15 | 1.44 | 1.06 | 1.39 | 1.33 | 1.95 | 0.93 | 4.56 | 1.21 | 1.54 |
 Minimum Value | 1.00 | 1.12 | 0.89 | 1.14 | 1.08 | 1.54 | 0.80 | 4.22 | 1.12 | 1.04 |
 Maximum Value | 1.98 | 1.59 | 2.41 | 1.64 | 1.38 | 2.89 | 1.06 | 8.98 | 1.76 | 1.54 |
 Mean (N = 110) | 1.34 | 1.37 | 1.42 | 1.33 | 1.28 | 2.06 | 0.92 | 6.14 | 1.39 | 1.21 |
 S.D. (N = 110) | 0.28 | 0.14 | 0.52 | 0.17 | 0.08 | 0.39 | 0.07 | 1.56 | 0.23 | 0.16 |
Winter (November) | ||||||||||
 ZY-1 | 1.00 | 1.18 | 0.94 | 1.11 | 1.22 | 1.95 | 0.91 | 2.69 | 0.99 | 1.17 |
 ZY-2 | 1.09 | 1.25 | 1.00 | 1.31 | 1.48 | 2.24 | 0.93 | 3.83 | 1.10 | 1.65 |
 ZY-3 | 1.52 | 1.24 | 2.14 | 1.16 | 1.11 | 2.54 | 0.93 | 3.95 | 1.52 | 1.27 |
 CT-1 | 1.08 | 1.28 | 1.28 | 1.25 | 1.26 | 1.91 | 0.91 | 2.56 | 1.09 | 1.34 |
 CT-2 | 1.20 | 1.36 | 1.23 | 1.27 | 1.33 | 1.80 | 0.95 | 2.65 | 1.01 | 1.37 |
 CT-3 | 1.09 | 1.22 | 1.00 | 1.15 | 1.25 | 1.99 | 1.00 | 3.26 | 0.95 | 1.42 |
 Minimum Value | 1.00 | 1.18 | 0.94 | 1.11 | 1.11 | 1.80 | 0.91 | 2.56 | 0.95 | 1.17 |
 Maximum Value | 1.52 | 1.36 | 2.14 | 1.31 | 1.48 | 2.54 | 1.00 | 3.95 | 1.52 | 1.65 |
 Mean (N = 42) | 1.16 | 1.26 | 1.27 | 1.21 | 1.27 | 2.07 | 0.94 | 3.16 | 1.11 | 1.37 |
 S.D. (N = 42) | 0.18 | 0.06 | 0.45 | 0.08 | 0.12 | 0.27 | 0.03 | 0.62 | 0.21 | 0.16 |