International Journal of Marine Science, 2017, Vol.7, No.13, 114-124
118
paints have been widely identified as major source of these metals in estuaries and harbours (Chouba and
Mazoughi, 2013). A significant high Zn concentration was also observed in Qusier harbour (Q2) (88.2±19.4 µg/g),
which was due to the past sedimentation of raw materials during the shipping operations. Phosphate rock,
particularly, contains considerable amounts of Zn and Cd as impurities (McMurtry et al., 1995).
Figure 2 Mean ±SE of heavy metals (µg/g) in sediments from different study sites
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
0
20
40
60
80
100
120
140
Cu (µg /g)
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
0
20
40
60
80
100
120
140
160
180
200
Zn (µg /g)
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
20
30
40
50
60
70
80
90
Pb (µg /g)
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Cd (µg /g)
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
20000
22000
24000
26000
Fe (µg /g)
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
0
100
200
300
400
500
600
700
Mn (µg /g)
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
10
20
30
40
50
60
70
Ni (µg /g)
G1 G2 G3 H1 H2 H3 S1 S2 S3 Q1 Q2 Q3
10
12
14
16
18
20
22
24
Co (µg /g)
