Removal of Cu, Zn, Pb, and Cr from Yangtze Estuary Using the Phragmites australis Artificial Floating Wetlands
Table 3
Mean values and standard deviation of metals translation factor (TF) (metals concentration ratio of root-rhizome and root-leaf and belowground parts and root + rhizome-aboveground parts and shoot) in P. australis.
Metals
Spring
Summer
Autumn
Winter
Mean ± SD
Mean ± SD
Mean ± SD
Mean ± SD
Cu
Root-rhizome
3.715 ± 1.653
5.257 ± 0.916
6.450 ± 0.663
0.433 ± 0.028
Root-shoot
4.611 ± 2.094
0.710 ± 0.438
0.642 ± 0.130
0.243 ± 0.063
Below ground- above ground
0.113 ± 0.017
0.110 ± 0.060
0.085 ± 0.012
0.169 ± 0.042
Zn
Root-rhizome
0.829 ± 0.122
2.895 ± 0.331
2.589 ± 0.414
0.602 ± 0.0302
Root-shoot
0.615 ± 0.122
0.915 ± 0.176
0.779 ± 0.247
0.343 ± 0.037
Below ground- above ground
0.336 ± 0.006
0.238 ± 0.056
0.186 ± 0.060
0.214 ± 0.023
Pb
Root-rhizome
2.148 ± 0.220
2.913 ± 1.695
7.031 ± 0.529
0.101 ± 0.0043
Root-shoot
0.581 ± 0.151
0.280 ± 0.006
0.822 ± 0.232
0.120 ± 0.058
Below ground- above ground
0.186 ± 0.051
0.077 ± 0.015
0.104 ± 0.034
0.109 ± 0.052
Cr
Root-rhizome
0.810 ± 0.056
0.599 ± 0.387
2.102 ± 0.135
0.987 ± 0.0123
Root-shoot
0.109 ± 0.038
0.130 ± 0.046
0.418 ± 0.049
0.093 ± 0.048
Below ground- above ground
0.133 ± 0.039
0.306 ± 0.212
0.200 ± 0.036
0.093 ± 0.0475
Values are the means of six replicates ± standard deviation. Significant difference between seasons (within the same tissue) is showed by small letter.
