Seawater heavy metal concentrations in the bay were comparable to those from Deep Bay, SouthChina (Cu: 5.8; Pb: <1; Zn: 39.5; and Cd : <1 mg l1, Cheung et al.,2003) and Gulf of Kutch,India (Cu:1.85; Zn: 21; Pb: 0.06 and Cd:1.46 mg l1, Chakraborty et al., 2014), but were much lower than those observed in six estuaries in Texas of the United States (Cu:100e3200; Zn: 300e18,000 and Pb: 16e305 mg l1, Benoit et al.,1994), coastal and estuarine seawater in North Australia (Cu: 308;Zn: 126; Pb: 7.7; and Cd: 4.1 mg l1, Munksgaard and Parry, 2001)and Gulf of Kutch, India (Cu: 5.0; Zn: 231; Pb: 0.4 and Cd: 6.1 mg l1
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