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Table 7 Comparison of heavy metal concentration and crustal average values obtained in this study with other coastal regions in India and around the world

From: Heavy metal pollutants and their spatial distribution in surface sediments from Thondi coast, Palk Bay, South India

Study area Fe Mn Cu Pb Cd Ni Cr Zn
Present study 52,802 686.1 290.3 54.7 1.2 27.7 14.1 252.9
Average crustal [39] 56,300 950 55 12.5 0.2 75 100 70
Coromandel Coast, Bay of Bengal [17] 7,144 76.45 49.629 19.8 27.984 109.45 78.76
Southeast coast of India [92] 2,780 543 6.7 19.7 50.7 191.3 58.7
Van Island, Gulf of Mannar, India [93] 31,219 163 57.81 348.4 110.04 108.73 52.5
Koswari Island, Gulf of Mannar [18] 30,988 147 54.2 496.7 92.7 67.5 16.9
Off Chennai, India [52] 15,032 113.2 325 51.2 200.1 123.9
Cuddalore, SE coast of India [21] 10,982 291 40 33.9 39.2 127 37.7
Palk Strait, southeast coast of India [94] 55,680 661 69 19 0.4 27 302 244
Parangipettai coast, India [95] 11,804 45 30.6 30.12 25.2 77.8 44.7
Arabian Gulf coast [96] 4,100 120 18 12 6 130 46
Tuticorin Coast, India [97] 28,717 330 52 42 30 15 247
South Port Klang, Malaysia [98] - 219.1 24.89 96.02 1.46 13.9 60.19 72.2
East Coast of India [23] 85,800 140.14 81.76 133.22
Tuticorin Coast [24] 28,717 52 42 0.2 75 15 247
Bay of Bengal, off Ennore [60] 27,200 506.2 32.36 6.58 38.61 194.8 126.8
Southwest coast of Spain [99] 35,300 569 336 197 2.5 50 92 649
Pitchavaram Mangrove region [63] 32,482 941 43.4 11.2 6.6 62 141.2 93