. 2020 Jul 16;10:11740. doi: 10.1038/s41598-020-68661-4

Table 3.

Correlation analysis between ΣREE, δCe, δEu and chemical indexes in ground water.

	pH	Fe	Mn²⁺	Cl⁻	SO₄²⁻	HCO₃⁻	Ammonia nitrogen	Total hardness
ΣREE	− 0.311	0.209	0.608**	0.090	0.462	− 0.263	0.626**	0.541*
La	− 0.315	0.217	0.621**	0.090	0.463	− 0.269	0.626**	0.545*
Ce	− 0.310	0.206	0.606**	0.079	0.452	− 0.264	0.614**	0.531*
δCe	0.202	− 0.010	− 0.015	0.061	0.012	0.147	− 0.100	− 0.059
δEu	0.319	− 0.392	− 0.374	− 0.505*	− 0.559*	− 0.050	− 0.129	− 0.483*

**Significant correlation at the 0.01 level (bilateral); *Significant correlation at the 0.05 level (bilateral).