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. Author manuscript; available in PMC: 2021 May 1.
Published in final edited form as: Environ Sci Pollut Res Int. 2020 Feb 14;27(13):14883–14902. doi: 10.1007/s11356-019-06746-y

Table 4.

Spearman correlations of major elements. Statistical significance (P<0.05) is shown in bold.

Na Al P K Ca Ti Fe
Na 1.00
Al 0.33 1.00
P 0.72 0.51 1.00
K 0.82 0.37 0.66 1.00
Ca 0.41 0.08 0.17 0.37 1.00
Ti 0.52 0.24 0.27 0.46 0.40 1.00
Fe 0.63 0.18 0.56 0.44 0.57 0.57 1.00