Current Status of Trace Metal Pollution in Soils Affected by Industrial Activities

Table 5

Statistical summary of trace element concentration (in mg kg⁻¹) in soils affected by industrial activities.

Industry group short name	Statistical parameter	Trace elements
		Pb	Zn	Mn	Ni	Cu	Cr	Fe	Cd	As
ME+MI	Mean	258	190	440	186	137	177	30.3	37.6	67.0
	Median	95	102	399	80.0	52.6	94.9	30.3	3.95	37.0
	SD	343	234	205	252	244	189	9.69	86.7	89.0
	Min	15.7	4.90	229	3.70	1.60	12.0	23.4	0.20	3.20
	Max	973	907	714	801	801	491	37.1	289	279
	𝑁	16	16	6	10	16	8	2	14	8
CE+PE	Mean	25.2	126	274	57.9	63.5	16.6	—	0.51	5.97
	Median	25.2	—	274	57.9	—	16.6	—	0.51	5.97
	SD	13.4	—	24.6	42.9	—	2.57	—	0.72	0.86
	Min	1.03	—	248	27.6	—	13.8	—	0.16	4.71
	Max	37.8	—	297	88.2	—	20.4	—	2.13	6.87
	𝑁	6	1	3	2	1	5	0	7	5
TE	Mean	124	207	525	51.1	136	568	308	42.0	—
	Median	124	—	525	—	136	—	—	42.0	—
	SD	95.2	—	202	—	38.7	—	—	58.8	—
	Min	56.4	—	382	—	109	—	—	0.48	—
	Max	191	—	668	—	164	—	—	83.6	—
	𝑁	2	1	2	1	2	1	1	2	0
LE	Mean	29.9	132	15.3	22.1	17.2	277	27.9	0.63	—
	Median	17.0	103	5.29	22.1	17.6	57.0	27.9	0.60	—
	SD	33.6	146	21.2	23.9	17.0	405	13.9	0.61	—
	Min	4.66	2.38	0.97	5.20	0.04	29.9	18.0	0.04	—
	Max	68.1	290	39.7	39.0	34.0	744	37.7	1.26	—
	𝑁	3	3	3	2	3	3	2	3	0
NM	Mean	104	166	255	41.9	35.8	26.0	—	25.8	—
	Median	55.0	166	217	39.0	38.4	26.0	—	5.00	—
	SD	109	171	77.9	7.24	31.6	5.30	—	40.1	—
	Min	28.6	45.0	204	36.5	2.90	22.2	—	0.33	—
	Max	229	287	345	50.1	66.0	29.7	—	72.0	—
	𝑁	3	2	3	3	3	2	0	3	0
BA	Value	268	169	—	39.3	62.3	100	—	—	—
ND	Mean	109	188	283	74.0	106	252	—	4.89	—
	Median	69.9	176	—	45.0	74	253	—	2.72	—
	SD	98.2	81.2	—	62.3	95.6	203	—	5.76	—
	Min	37.7	103	—	17.0	25.6	26.6	—	0.70	—
	Max	293	313	—	184	298	521	—	13.4	—
	𝑁	6	6	1	7	8	6	0	4	0
All	Mean	158	180	312	106	106	176	84.8	21.6	42.8
	Median	65.0	131	280	49.6	52.6	44.0	37.1	2.00	25.7
	SD	247	180	208	168	176	217	125	59.8	71.8
	Min	1.03	2.38	0.97	3.70	0.04	12.0	18.0	0.04	3.20
	Max	973	907	714	801	801	744	308	289	279
	𝑁	37	30	18	26	34	26	5	33	14