. Author manuscript; available in PMC: 2024 Apr 4.

Published in final edited form as: Front Environ Sci. 2023 Apr 4;11:1–20. doi: 10.3389/fenvs.2023.1020914

Table 6:

Linear regression analysis of elemental concentration to Cl⁻ concentration added in incubations.

NaCl R²-values

Element	BS1	BS2	BR1	BR2	PND1	PND2	WL1	WL2

B	0.99	0.00	0.21	0.50	0.07	0.49	0.54	0.41
Ba²⁺	0.07	0.43	0.67	0.69	0.94	0.06	0.44	0.85
Ca²⁺	0.98	0.92	0.54	0.93	0.71	0.76	0.94	0.93
Cu	0.99	0.99	1.00	1.00	1.00	1.00	0.97	1.00
Fe	0.47	0.37	0.04		0.18	0.42	0.74	0.01
K⁺	0.96	0.88	0.88	0.90	0.89	0.93	0.85	0.95
Mg²⁺	0.55	0.83	0.36	0.04	0.92	0.45	0.84	0.89
Mn	0.00	0.12	0.01	0.28	0.81	0.12	0.17	0.81
Na⁺	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
S			0.27	0.53	0.04	0.91	0.06	0.31
Sr²⁺	0.97	0.96	0.87	0.94	0.73	0.75	0.55	0.94
CaCl2 R²-values

Element	BS1	BS2	BR1	BR2	PND1	PND2	WL1	WL2

B	0.99	0.19	0.81	0.32	0.64	0.41	0.54	0.20
Ba²⁺	0.30	0.89	0.97	0.54	0.97	0.37	0.51	0.93
Ca²⁺	1.00	1.00	1.00	0.43	1.00	1.00	1.00	1.00
Cu	0.02	0.48	0.38	0.16	0.98	0.07	0.03	0.15
Fe	0.35	0.37	0.36		0.80	0.34	0.11	0.28
K⁺	0.97	0.96	0.51	0.38	0.96	0.96	0.98	0.92
Mg²⁺	0.91	0.76	0.93	0.03	0.93	0.22	0.65	0.87
Mn	0.60	0.05	0.15	0.12	0.92	0.17	0.76	0.88
Na⁺	0.32	0.41	0.78	0.55	0.83	0.82	0.54	0.94
S		0.99	0.99	0.42	0.56	0.97	1.00	0.99
Sr²⁺	0.95	0.98	0.97	0.53	0.98	0.99	0.96	0.99
MgCl₂ R²-values

Element	BS1	BS2	BR1	BR2	PND1	PND2	WL1	WL2

B	0.22	0.23	0.00	0.28	0.26	0.58	0.40	0.04
Ba²⁺	0.78	0.87	0.84	0.62	0.81	0.10	0.68	0.84
Ca²⁺	0.92	0.92	0.75	0.84	0.65	0.72	0.69	0.91
Cu	0.80	0.16	0.63	0.82	0.92	0.65		0.60
Fe	0.17	0.43	0.36	0.01	0.24	0.33	0.13	0.11
K⁺	0.87	0.84	0.58	0.97	0.93	0.94	0.95	0.90
Mg²⁺	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
Mn	0.10	0.90	0.23	0.07	0.79	0.01	0.88	0.87
Na⁺	0.40	0.33	0.68	0.48	0.45	0.51	0.04	0.78
S	0.47	0.60	0.55	0.01	0.64	0.65	0.15	0.39
Sr²⁺	0.91	0.91	0.78	0.84	0.68	0.73	0.23	0.81

R² results are color coded from white to green with green indicating high R² and white indicating low R². Significant cells are shown in bold typeface (p-values <0.05).