Harmful Chemicals in Soil and Risk Assessment of an Abandoned Open Dumpsite in Eastern China

Table 6

Potential ecological risk indices (, RI) of heavy metals in the soils.

Soil in the interior area of the dumpsite	Environmental background values of Shandong	Maximum	27.36	3.56	12.21	9.05	8.72	6.45	1075.00	1127.14
		Minimum	13.91	1.34	2.72	2.28	4.48	0.70	62.50^*	94.59^*
		Average	19.74	2.67	8.12	5.90	6.89	2.65	390.63^*	494.69^*
	China^a	Maximum	7.93	1.16	2.65	0.73	4.01	1.60	34.40	48.15
		Minimum	4.03	0.44	0.59	0.19	2.06	0.17	2.00^*	11.41^*
		Average	5.73	0.87	1.76	0.48	3.17	0.66	12.50^*	29.76^*
Soil in the boundary area of the dumpsite	Environmental background values of Shandong	Maximum	27.82	2.34	7.81	4.40	9.17	1.48	125.00	164.62
		Minimum	14.37	1.31	2.44	2.16	3.98	0.63	62.50^*	88.46^*
		Average	20.49	1.83	4.98	3.24	6.49	1.04	67.31^*	105.37^*
	China^a	Maximum	8.07	0.76	1.70	0.36	4.22	0.37	4.00	17.31^*
		Minimum	4.17	0.43	0.53	0.18	1.83	0.16	2.00^*	9.55^*
		Average	5.94	0.60	1.08	0.26	2.99	0.26	2.15^*	13.30^*

The data are from Table 4. Half of the detection limit.