Table 4.

Concentrations of heavy metals in seaweeds collected from the Egyptian coast of Alexandria (mg/kg)

Seaweed species	Fe	Mn	Zn	Cu	Co	Cr	Ni	Pb	Cd	V	As	Se	Mo	Ba
Green seaweeds
U. fasciata (EH)	146.70	24.55	40.62	16.62	0.25	2.62	3.80	2.57	0.46	0.58	3.35	0.03	0.07	6.07
U. fasciata (AQ)	402.90	17.70	43.30	16.83	0.20	8.02	5.51	0.89	0.10	2.71	6.60	0.05	0.25	7.70
U. linza (AQ)	899.96	21.11	93.47	19.27	0.30	7.49	4.43	1.15	0.32	3.49	9.06	0.03	0.20	12.35
Red seaweeds
J. rubens (AQ)	414.99	85.36	30.99	5.04	0.26	2.01	2.10	3.33	3.65	1.73	2.10	0.54	0.28	11.92
C. officinalis (EH)	78.83	19.22	72.97	13.12	0.47	1.16	2.44	4.66	2.91	0.80	0.73	1.02	0.05	12.53
Brown seaweeds
C. sinuosa (AQ)	572.02	50.62	24.38	5.34	0.30	2.63	2.53	2.98	1.52	3.13	4.79	1.09	0.30	34.93
Minimum	78.83	17.70	24.38	5.04	0.20	1.16	2.10	0.89	0.10	0.58	0.73	0.03	0.05	6.07
Maximum	899.96	85.36	93.47	19.27	0.47	8.02	5.51	4.66	3.65	3.49	9.06	1.09	0.30	34.93
Average	419.23	36.43	50.95	12.70	0.30	3.99	3.47	2.60	1.50	2.07	4.44	0.46	0.19	14.25
SD	298.29	26.90	26.69	6.14	0.09	2.97	1.34	1.41	1.49	1.22	3.05	0.50	0.11	10.48