Effects of Different Water Seasons on the Residual Characteristics and Ecological Risk of Polycyclic Aromatic Hydrocarbons in Sediments from Changdang Lake, China

Table 5

Standard pollution criteria of PAH concentrations for sediment (ng/g dw) (ERL: effects range-low, ERM: effects range-median, and NA: not available).

	Guidelines		This study
PAHs			March		June		September
	ERL	ERM	Average	Max	Average	Max	Average	Max
Nap	160	2100	0.25	1.54	151.35	212.11	61.96	169.41
Ace	44	640	14.34	76.28	15.455	32.59	14.7	21.21
Flu	19	540	19.11	29.6	6.28	10.75	9.66	17.08
Phe	240	1500	19.11	48.29	5.21	8.78	10.53	23.62
Ant	853	1100	9.33	16.29	13.08	20.93	5.82	26.78
Fla	600	5100	6.09	9.08	4.08	8.07	3.31	6.43
Pyr	665	2600	13.38	28.74	5.73	16.42	5.64	11.26
BaA	261	1600	13.58	27.8	8.48	14.23	2.5	10.66
Chr	384	2800	26.21	36.35	8.56	16.19	2.95	11.69
BbF	320	1880	96.17	136.84	5.05	8.53	1.38	8.85
BkF	280	1620	19.82	30.28	13.05	26.39	4.61	13.84
BaP	430	1600	6.91	10.99	4.9	19.68	7.38	12.11
DahA	63.4	260	48.83	69.28	1.83	10.99	NA	NA
BghiP	430	1600	16.13	52.69	NA	NA	NA	NA
∑PAHs	4749	24940	309.31	574.05	243.08	405.66	130.5	332.94