Table 4.

Distribution of the trace metal concentrations (µg g^-1) in the Sundarbans mangrove soils.

Sample	Fe	Mn	Cu	Zn	Pb	Cd	Ni	Cr
S-1	38,432.5 ± 172.5	628.25 ± 11.25	41.83 ± 0.08	55.98 ± 0.11	32.67 ± 5.41	0.31 ± 0.01	70.44 ± 2.13	45.75 ± 0.42
S-2	36,137.5 ± 232.5	713.25 ± 26.255	29.37 ± 0.95	63.37 ± 0.28	25.20 ± 3.28	0.21 ± 0.01	101.79 ± 3.04	33.80 ± 0.49
S-3	35,570.0 ± 290.0	702.15 ± 5.0	39.88 ± 0.63	59.89 ± 2.83	22.54 ± 1.65	0.18 ± 0.02	75.63 ± 2.14	41.30 ± 0.42
S-4	31,787.5 ± 837.9	653.20 ± 11.18	29.00 ± 1.50	47.83 ± 2.53	32.4 ± 4.15	0.56 ± 0.02	92.61 ± 5.11	34.90 ± 0.35
S-5	35,552.5 ± 121.0	665.80 ± 22.50	37.48 ± 0.70	58.60 ± 0.78	24.44 ± 3.77	0.49 ± 0.03	78.33 ± 4.42	40.40 ± 0.28
S-6	32,762.5 ± 201.9	666.15 ± 15.0	35.94 ± 0.77	59.90 ± 0.98	19.36 ± 2.66	0.34 ± 0.01	74.85 ± 11.26	36.60 ± 0.84
S-7	33,135.0 ± 641.1	636.60 ± 27.3	31.10 ± 0.23	52.34 ± 0.36	18.00 ± 1.56	0.17 ± 0.03	69.15 ± 9.32	34.00 ± 0.59
S-8	37,932.5 ± 257.5	803.14 ± 50.6	38.29 ± 10.0	59.10 ± 2.52	27.9 ± 2.40	0.23 ± 0.01	85.60 ± 3.21	41.95 ± 0.60
S-9	32,760.7 ± 655.0	665.1 ± 35.0	37.17 ± 0.88	72.07 ± 3.31	39.60 ± 4.53	0.11 ± 0.01	103.95 ± 22.25	48.84 ± 0.64
S-10	29,592.5 ± 350.3	559. 7 ± 23.67	36.17 ± 0.28	63.52 ± 0.85	19.17 ± 1.01	0.08 ± 0.01	75.35 ± 4.64	32.50 ± 0.46
S-11	31,365.0 ± 575.5	581.84 ± 17.50	24.38 ± 0.23	53.27 ± 2.46	28.01 ± 2.10	0.1 ± 0.02	60.82 ± 2.09	35.65 ± 0.32
S-12	28,190.0 ± 525.4	735.70 ± 42.5	33.92 ± 0.33	62.45 ± 0.35	30.67 ± 1.67	0.10 ± 0.03	87.00 ± 2.90	40.00 ± 0.35
S-13	26,105.1 ± 440.0	574.84 ± 32.5	30.58 ± 0.58	58.52 ± 0.16	21.74 ± 0.63	0.25 ± 0.03	84.60 ± 3.27	42.75 ± 0.32
S-14	27,192.5 ± 297.5	539.48 ± 22.3	25.75 ± 0.25	47.97 ± 0.54	29.79 ± 6.03	0.09 ± 0.01	67.65 ± 4.09	24.61 ± 0.71
S-15	30,902.5 ± 912.5	469.76 ± 12.5	28.82 ± 0.08	48.29 ± 1.90	17.14 ± 0.63	0.07 ± 0.02	62.23 ± 4.21	15.15 ± 0.04
S-16	20,920.0 ± 804.1	478.24 ± 82.5	27.05 ± 0.50	46.05 ± 3.30	32.81 ± 3.31	0.31 ± 0.04	71.25 ± 5.00	24.22 ± 0.92
S-17	26,125.3 ± 144.2	619.36 ± 62.1	32.27 ± 0.18	61.21 ± 1.19	33.35 ± 2.52	0.14 ± 0.01	60.55 ± 3.73	34.55 ± 0.21
S-18	28,310.3 ± 318.6	637.56 ± 47.5	31.51 ± 0.05	63.28 ± 1.19	19.50 ± 0.85	0.11 ± 0.03	55.80 ± 3.84	35.23 ± 0.68
S-19	33,960.0 ± 1656.8	593.9 ± 10.0	24.87 ± 0.48	71.76 ± 8.50	25.00 ± 1.57	0.09 ± 0.01	47.65 ± 4.70	22.35 ± 0.78
S-20	22,207.5 ± 365.4	472.78 ± 19.0	27.70 ± 0.40	51.13 ± 2.15	16.57 ± 1.20	0.09 ± 0.01	53.35 ± 4.02	20.83 ± 0.57
Min	20,920.0 ± 804.1	469.76 ± 12.5	24.38 ± 0.23	46.05 ± 3.30	16.57 ± 1.20	0.07 ± 0.03	47.65 ± 4.70	15.15 ± 0.04
Max	38,432.5 ± 172.5	803.14 ± 50.6	41.83 ± 0.08	72.07 ± 3.31	39.60 ± 4.53	0.56 ± 0.02	103.95 ± 22.25	48.84 ± 0.64
Mean	30,947.07	623.01	32.15	57.83	25.79	0.202	73.93	34.27
SD	4865.478	89.82	5.19	7.47	6.54	0.14	15.36	8.85
Shale	47,200	850	45	95	NA	0.3	68	90
UCC	35,000	600	25	71	16	0.098	50	85

Min. minimum, Max. maximum, SD standard deviation, UCC upper continental crust.