Potential contaminants at a dredged spoil placement site, Charles City County, Virginia, as revealed by sequential extraction

Tang, Jianwu; Whittecar, G Richard; Johannesson, Karen H; Daniels, W Lee

doi:10.1186/1467-4866-5-49

Table II Concentrations of trace elements in extractions, residual, and total sediment. (Concentrations are expressed in ng/g of sediment, dry weight, except for Fe, which is in mg/g of sediment, dry weight)

From: Potential contaminants at a dredged spoil placement site, Charles City County, Virginia, as revealed by sequential extraction

Metal	Sample No.	Fraction 1	Fraction 2	Fraction 3	Fraction 4	Residual phase	Total sediment	Recovery (%)
Ag	1	0.071	0.108	24.282	13.151	295.500	272.972	122.03
	2	a	0.258	26.423	194.766	491.561	693.362	102.83
	4	a	a	258.351	1 640.871	nd^b	2725.560	nd
	5	a	0.108	74.332	98.191	348.656	528.108	98.71
	6	a	a	5.307	1.010	243.375	240.755	103.72
	7	0.029	a	10.231	2.750	296.623	280.744	110.29
	8	0.042	0.046	16.736	1.523	255.623	250.221	109.49
	9	0.062	0.078	9.059	5.319	287.225	279.386	108.00
Cd	1	6.472	48.354	45.847	5.486	101.534	238.342	87.14
	2	6.275	117.290	85.701	6.849	161.041	303.086	124.44
	4	43.571	349.965	311.591	106.501	nd	866.235	nd
	5	39.239	699.384	2223.193	179.158	921.440	5 066.074	80.19
	6	0.400	1.678	10.813	2.650	91.395	100.167	106.76
	7	3.998	8.867	64.063	7.605	104.854	174.981	108.23
	8	0.669	2.506	16.212	2.968	102.618	121.542	102.82
	9	3.568	8.871	44.786	4.804	98.115	173.394	92.36
Sb	1	5.028	13.786	5.503	4.746	515.786	474.605	114.80
	2	6.710	28.956	7.883	4.863	483.815	519.791	102.39
	4	8.204	29.122	12.983	7.455	nd	720.023	nd
	5	6.312	18.481	7.257	4.735	649.543	632.068	108.58
	6	1.372	1.554	3.924	2.673	544.855	478.999	115.74
	7	1.581	1.727	3.974	3.330	532.943	485.434	111.97
	8	0.517	1.481	5.382	3.878	649.343	644.756	102.46
	9	0.845	1.681	7.016	4.484	530.655	454.094	119.95
Tl	1	3.188	3.457	15.325	11.274	528.135	621.076	90.39
	2	3.522	5.351	22.836	17.036	349.515	443.725	89.75
	4	5.204	7.084	37.733	25.468	nd	569.952	nd
	5	2.678	4.336	22.136	15.267	406.490	468.313	96.28
	6	1.246	1.148	22.210	13.809	350.623	398.097	97.72
	7	1.505	1.265	10.337	9.181	507.974	427.184	124.13
	8	0.995	0.802	19.498	8.158	396.546	444.724	95.79
	9	2.806	2.093	19.205	9.198	408.756	400.062	110.50
Pb	1	11.260	1 999.360	9271.597	2 300.046	6 202.777	25 326.599	78.12
	2	9.060	5 340.496	17 736.960	4 033.203	4 827.587	33 594.686	95.10
	4	14.420	5 434.827	32 087.274	11519.033	nd	52435.338	nd
	5	129.663	31 102.512	91 037.459	14546.412	15 745.862	189 134.779	80.66
	6	4.127	765.766	5 330.865	869.676	4 659.941	15 741.670	73.88
	7	4.759	615.366	7 478.567	1 773.999	9091.660	18 007.325	105.31
	8	4.984	1032.451	6 844.099	836.929	5 032.686	18 227.665	75.44
	9	4.741	792.434	5 562.834	782.768	6638.363	16785.683	82.10
Cr	1	9.250	676.057	4 144.599	3533.393	57449.183	61441.193	107.11
	2	6.695	904.332	5931.275	4631.480	48271.178	53 827.594	110.99
	4	8.988	1 302.097	11276.499	9805.180	nd	70 072.496	nd
	5	9.102	855.133	5 642.895	4 230.704	46 970.601	51 356.518	112.37
	6	12.017	25.631	3 194.288	1929.951	40 754.522	38091.117	120.54
	7	7.660	42.031	6 567.750	3 158.592	50 648.430	59 552.998	101.46
	8	16.475	27.106	4 848.704	1 396.597	43 903.636	51 437.231	97.58
	9	43.920	15.808	1 888.904	1 545.616	39 454.099	37 642.710	114.09
Fe	1	0.001	0.495	9.124	0.484	27.617	39.577	95.31
	2	3.3E–5	0.505	10.108	0.737	23.525	31.584	110.42
	4	4.3E–5	0.326	11.235	1.817	nd	38.392	nd
	5	4.3E–5	0.606	10.228	0.718	23.674	31.623	111.39
	6	a	0.001	6.469	0.484	29.853	34.569	106.47
	7	6.7E–5	0.001	4.964	0.334	17.561	22.729	100.58
	8	2.6E–4	0.001	8.664	0.356	25.631	36.269	95.54
	9	1.1E–5	0.002	6.770	0.464	19.486	26.629	100.35
Ni	1	32.781	1 169.294	4853.280	2 054.761	25738.313	33 034.089	102.47
	2	27.933	1 857.217	6498.011	2316.266	21 107.574	28958.351	109.84
	4	46.143	1 794.210	9 930.939	3 878.025	nd	35 266.273	nd
	5	40.443	1 628.284	6 406.030	2813.551	19433.457	30003.451	101.06
	6	44.151	35.639	1 456.371	1 601.098	19913.320	17795.148	129.53
	7	186.767	503.479	8233.408	1 412.784	23 452.670	32 684.564	103.38
	8	58.319	44.355	1 856.858	810.413	22 698.592	23 392.666	108.87
	9	26.250	114.256	2 307.372	1 272.209	17232.591	16453.127	127.35
Cu	1	53.019	1 188.204	3 758.365	5944.153	17415.774	29436.611	96.34
	2	49.178	1 773.634	4434.530	8 870.600	15 064.632	27 370.758	110.31
	4	109.659	3 729.499	11020.389	22 689.878	nd	49 870.074	nd
	5	34.285	1 427.713	4967.171	7551.255	15315.070	27 577.567	106.23
	6	15.007	83.844	2938.981	1 822.681	20 064.779	18926.953	131.69
	7	25.881	932.864	16 554.675	3 301.967	15848.147	33243.183	110.29
	8	13.493	75.531	3 035.225	990.290	18 085.262	21 602.361	102.77
	9	19.182	175.868	4095.619	1431.143	11754.839	14271.972	122.45
Zn	1	102.805	2 748.999	16884.517	5534.190	55 179.058	89011.596	90.38
	2	45.126	15 607.008	42 838.627	7910.451	45 422.619	102402.318	109.20
	4	300.531	46 232.551	143051.392	32 983.708	nd	254 094.253	nd
	5	86.802	18314.012	61 859.848	7 562.907	39 928.454	125 067.801	102.15
	6	6.174	103.943	5 986.605	5 559.082	57 102.705	60814.605	113.06
	7	37.223	1 530.869	31940.336	9 076.450	55 298.628	89 163.105	109.78
	8	15.069	133.418	7 826.604	3 432.023	55 492.337	70 172.591	95.34
	9	7.089	319.206	13 012.595	6488.597	51448.571	59903.783	118.98
As	1	28.328	151.934	1 232.778	34.054	4719.936	5499.051	112.15
	2	29.745	201.669	1544.199	93.879	4500.311	4431.341	143.74
	4	19.041	219.711	2713.633	331.686	nd	7 145.773	nd
	5	47.221	267.051	1 943.043	148.682	5 445.426	5 496.017	142.86
	6	a	12.706	108.269	a	7 268.973	6212.311	119.08
	7	34.574	68.575	2 191.545	169.113	10 166.936	10736.104	117.65
	8	10.537	20.510	154.292	a	7 677.608	8 578.925	91.76
	9	a	10.850	311.100	a	5 635.792	4 953.477	120.24

^aBelow detection limit.
^bnd = not determined.

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ISSN: 1467-4866

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