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. 2023 May 15;9(5):e16307. doi: 10.1016/j.heliyon.2023.e16307

Table 3.

The correlation matrix for DTPA-extractable PTEs and soil physicochemical characteristics.

	Sand	Clay	Silt	OM	pH	Cd	Co	Cu	Fe	Mn	Ni	Pb
Clay	−0.261
Silt	−0.942^a	−0.078
OM	−0.276	0.042	0.270
pH	0.168	−0.358^b	−0.049	−0.504^a
Cd	−0.077	0.204	0.008	0.296	−0.145
Co	−0.428^a	0.016	0.437^a	0.621^a	−0.688^a	0.127
Cu	−0.227	0.346^b	0.114	0.136	−0.117	0.067	0.082
Fe	0.087	0.303	−0.195	0.393^b	−0.814^a	0.282	0.385^b	0.076
Mn	−0.448^a	0.231	0.382^b	0.525^a	−0.870^a	0.201	0.868^a	0.208	0.599^a
Ni	0.440^a	0.232	−0.535^a	0.239	−0.456^a	0.179	0.099	0.050	0.723^a	0.213
Pb	0.212	0.192	−0.285	0.178	−0.004	0.893^a	−0.096	−0.002	0.206	−0.024	0.261
Zn	0.209	0.129	−0.261	0.083	−0.004	0.765^a	−0.072	−0.035	0.210	−0.019	0.161	0.703^a

^a

Correlation is significant at the 0.01 level.

^b

Correlation is significant at the 0.05 level.