Concentrations and sources of polycyclic aromatic hydrocarbons in surface coastal sediments of the northern Gulf of Mexico

Table 1 Sediment properties for each station (nd: not detected)

Sampling station	TOC (%)	TN (%)	C/N	Sediments fractions (%)			Surface area (m²/g)
Sampling station	TOC (%)	TN (%)	C/N	Sand (>63 μm)	Silt (4 ~ 63 μm)	Clay (<4 μm)	Surface area (m²/g)
MP	2.02	0.13	15.44	71.46	21.93	6.61	3.87
GB	6.93	0.43	16.12	63.61	31.24	5.15	8.16
W1	0.94	0.05	17.20	65.92	29.17	4.91	4.43
W2	1.35	0.10	13.81	61.09	30.77	8.14	4.87
B6	1.15	0.11	10.10	11.37	70.02	18.61	16.59
C6	0.70	0.07	9.70	21.43	62.88	15.69	13.88
CT	0.71	0.07	10.10	12.40	69.06	18.54	16.05
F5	0.62	0.08	8.00	28.12	59.47	12.41	13.21
A	0.11	0.02	7.24	94.55	4.07	1.38	1.34
B1	0.45	0.04	9.11	92.29	6.20	1.51	0.90
B2	0.98	0.05	18.80	61.22	34.11	4.67	3.53
MRM-2010-05	1.36	0.14	10.10	15.16	66.12	18.72	nd
MRM-2010-08	13.89	0.71	19.50	10.86	67.13	22.01	13.08
MRM-2012-05	0.97	0.10	10.10	10.00	59.88	30.12	nd

TOC and TN represent total organic carbons and total nitrogen, respectively. Silt and clay fractions decreased from shelf sediments to coastal sediments, as well as surface area. The TOC% and C/N exhibited opposite patterns.

ISSN: 1467-4866