Table 4.

Evaluation on potential risk of heavy metals pollution in sediments from the Egyptian Mediterranean coast

Station	Potential ecological risk factor Ei r							RI	Risk grade
	Cd	Cr	Cu	Mn	Ni	Pb	Zn
1	28.70	0.70	1.54	0.14	0.56	4.09	0.41	36.13	Low
2	7.40	0.09	0.02	0.03	0.12	0.90	0.02	8.58	Low
3	6.40	0.12	0.10	0.02	0.70	3.67	0.10	11.10	Low
4	34.60	0.36	1.04	0.17	0.64	3.07	0.24	40.13	Low
5	16.10	0.52	0.82	0.12	0.42	13.23	0.52	31.72	Low
6	46.90	0.16	0.19	0.27	0.27	1.93	0.07	49.79	Low
7	44.10	0.56	2.88	0.18	0.64	7.48	0.65	56.50	Low
8	38.30	0.21	1.22	0.16	0.20	6.11	0.21	46.41	Low
9	19.00	1.90	0.63	0.62	1.42	2.36	0.17	26.11	Low
10	39.10	0.75	0.26	0.49	1.32	1.46	0.11	43.48	Low
11	44.70	0.68	0.55	0.43	0.84	1.73	0.15	49.09	Low
12	14.20	1.87	0.35	0.27	2.68	1.15	0.11	20.62	Low
13	9.20	6.62	0.78	0.93	4.16	1.60	0.26	23.56	Low
14	23.20	2.60	1.10	0.63	3.20	1.45	0.18	32.36	Low
15	3.50	1.76	1.33	0.97	3.26	2.21	0.28	13.30	Low
16	5.00	2.27	1.92	0.85	4.15	1.74	0.31	16.24	Low
17	14.90	5.19	0.78	0.57	4.43	1.61	0.19	27.67	Low
18	12.60	2.49	1.31	0.57	3.60	1.97	0.28	22.81	Low
19	4.30	6.32	1.27	1.28	3.49	1.67	0.32	18.63	Low
20	18.10	1.61	0.17	0.06	2.04	0.83	0.03	22.85	Low
Mean	21.52	1.84	0.91	0.44	1.91	3.01	0.23	29.85	Low