. 2019 Jul 22;16(14):2604. doi: 10.3390/ijerph16142604

Table 4.

PAHs content (mg/kg dw) of sludge from selected drinking water treatment plants (DWTP) and wastewater treatment plants (WWTP) in southwestern Taiwan.

PAHs ^a		DWTP		WWTP
PAHs ^a		DW 1	DW 2	WW 1	WW2	WW3	WW4
2-ring	NA	0.0117	ND (0.0008) ^e	0.0981	0.0185	0.0290	0.0518
3-ring	ACY	ND (0.0007) ^e	ND (0.0002) ^e	0.0285	0.0009	0.0058	0.0146
	ACE	0.0019	0.0017	0.0064	0.0017	0.0028	0.0117
	FL	0.0054	0.0043	0.0104	0.0034	0.0139	0.0097
	PH	0.0201	0.0204	0.1291	0.0114	0.0511	0.1018
	AN	0.0396	ND (0.0005) ^e	0.0827	0.0122	0.0384	0.0683
4-ring	FLU	0.0067	0.0075	0.1516	0.0129	0.0829	0.1275
	PY	0.0081	0.0100	0.1475	0.1336	0.0657	0.1195
	BaA ^b	0.0119	ND (0.0014) ^e	0.0568	0.0163	0.0236	0.0382
	CH ^b	0.0107	0.0093	0.0884	0.0924	0.0452	0.0622
5-ring	BbF ^b	0.0015	0.0042	0.0301	0.0087	0.0195	0.0257
	BkF ^b	0.0018	ND (0.0006) ^e	0.0297	0.0097	0.0186	0.0255
	BaP ^b	0.0059	ND (0.0011) ^e	0.0685	0.0070	0.0373	0.0527
	IP ^b	0.0049	ND (0.0010) ^e	0.0754	0.0640	0.0526	0.0750
6-ring	DBA ^b	ND (0.0042) ^e	ND (0.0002) ^e	0.0228	0.0434	0.0134	0.0210
	BP	0.0008	0.0037	0.0408	0.0997	0.0344	0.0635
ΣPAHs ^c		0.1357	0.0668	1.0666	0.5357	0.5342	0.8684
ΣLPAHs ^c		0.0793	0.0279	0.0355	0.0480	0.1410	0.2577
ΣHPAHs ^c		0.0564	0.0389	0.7116	0.4877	0.3931	0.6107
ΣLPAHs/ΣHPAHs		1.40	0.72	0.50	0.10	0.36	0.42
ΣCPAHs ^c		0.0409	0.0177	0.3716	0.2415	0.2101	0.3002
ΣTEQ ^d		0.0041	0.0018	0.0372	0.0242	0.0210	0.0300

^a The definitions of compound abbreviation see Table 2; ^b Carcinogenic PAHs; ^c ΣPAHs: sum of 2–6-ring PAHs; ΣLPAHs: sum of 2- & 3-ring PAHs; ΣHPAHs: sum of 4-, 5-, and 6-ring PAHs; ΣCPAHs: sum of 7 carcinogenic PAHs; ^d ΣTEQ: sum of 7 carcinogenic PAHs BaP toxic equivalence quotient; ^e The measured value is less than the detection limit.