Research Article
Removal of Cu, Zn, Pb, and Cr from Yangtze Estuary Using the Phragmites australis Artificial Floating Wetlands
Table 4
Pearson correlation coefficients between metal concentrations in the aboveground and underground tissues and water factors.
| Tissues | Season | Metals | Water factors | DO | SAL | TDS | SPC | ORP | PH | |
| Aboveground | Spring | Cu | NS | NS | NS | NS | NS | NS | NS | Zn | NS | NS | 0.701 | 0.699 | NS | NS | NS | Pb | NS | NS | NS | NS | NS | NS | NS | Cr | NS | NS | NS | NS | NS | NS | NS | Summer | Cu | NS | −0.750 | −0.675 | −0.672 | NS | NS | NS | Zn | NS | −0.767 | −0.680 | −0.679 | NS | NS | NS | Pb | NS | NS | NS | NS | NS | NS | NS | Cr | NS | NS | NS | NS | NS | NS | NS | Autumn | Cu | NS | −0.778 | NS | NS | NS | NS | NS | Zn | NS | −0.787 | NS | NS | NS | NS | NS | Pb | NS | NS | NS | NS | NS | NS | NS | Cr | −0.831 | NS | 0.835 | 0.836 | 0.744 | −0.720 | NS | Winter | Cu | NS | −0.751 | NS | NS | NS | NS | NS | Zn | NS | −0.442 | NS | NS | NS | NS | NS | Pb | NS | −0.684 | NS | NS | NS | NS | NS | Cr | NS | 0.668 | NS | NS | NS | NS | NS | Underground | Spring | Cu | NS | NS | NS | NS | NS | NS | NS | Zn | NS | NS | NS | NS | NS | NS | NS | Pb | NS | NS | NS | NS | NS | NS | NS | Cr | NS | NS | NS | NS | NS | NS | NS | Summer | Cu | NS | NS | NS | NS | NS | NS | NS | Zn | NS | NS | NS | NS | NS | NS | NS | Pb | NS | NS | NS | NS | NS | NS | NS | Cr | NS | NS | NS | NS | NS | NS | NS | Autumn | Cu | NS | NS | NS | NS | NS | NS | NS | Zn | NS | NS | NS | NS | NS | NS | NS | Pb | NS | NS | NS | NS | NS | NS | NS | Cr | 0.534 | NS | NS | NS | NS | NS | NS | Winter | Cu | NS | NS | NS | NS | NS | NS | NS | Zn | NS | NS | NS | NS | NS | NS | NS | Pb | NS | NS | NS | NS | NS | NS | NS | Cr | NS | NS | NS | NS | NS | NS | NS |
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NS: no significant correlation. Correlation is significant at the 0.05 level. Correlation is significant at the 0.01 level.
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