Levels, Temporal-Spatial Variations, and Sources of Organochlorine Pesticides in Ambient Air of Lake Chaohu, China

Table 3

Residual levels of OCPs in ambient air at the HB and MS from March 2010 to February 2011.

	HB (AM ± SD, pg/m^3)			MS (AM ± SD, pg/m^3)
	Gas phase	Particle phase	Total	Gas phase	Particle phase	Total
α-HCH	14.7±12.2	1.1±1.5	15.8±12.9	17.5±13	1.4±2.3	19.2±15.2
β-HCH	4.6±8.1	ND	4.6±8.1	9.9±15.6	ND	10.7±17.4
γ-HCH	6.7±5.1	0.9±1.0	7.6±4.8	13.3±12.2	1±0.9	15.0±13.6
δ-HCH	1.8±2.7	0.2±0.6	2.1±2.8	3.1±4.6	0.2±0.4	3.5±5.4
HCHs	27.9±20.0	2.2±2.9	30.1±20.6	43.8±36.1	2.5±3.4	48.4±42.2
o, p′-DDE	67.0±89.0	0.1±0.2	67±88.9	74.1±96.0	0.2±0.7	78.4±102
p, p′-DDE	19.6±19.3	1.4±1.3	21±18.6	24.7±25.6	1.4±1.7	27.6±27.7
o, p′-DDD	0.3±1.0	1.4±2.4	1.7±2.4	2.4±4.3	1.9±4.6	4.2±5.4
p, p′-DDD	1.1±1.1	4±9.1	5.2±8.8	1.4±1.7	2.7±5.7	4.2±5.5
o, p′-DDT	8.0±10.7	3.0±3.0	11.1±9.5	7.3±7.7	3.5±4.4	11.2±9.3
p, p′-DDT	4.6±5.9	13.9±33.3	18.5±37.3	6.6±9.0	3.1±4.1	10.3±11.1
DDTs	100.7±112.8	23.8±33.9	124.5±127.6	116.5±136.8	12.8±14.5	136±140.1
HCB	11.2±16.8	1.6±0.7	12.7±17.3	9.7±13.9	1.6±0.8	11.3±14.1
Heptachlor	6.4±7.2	0.2±0.4	6.6±7.5	3.7±3.7	0.3±0.7	3.9±3.8
Aldrin	12.8±26.9	1.2±2.0	14.0±26.9	14.3±30.1	1.2±2.2	16±31.6
Isodrin	3.0±3.4	1.2±1.3	4.2±3.2	1.9±1.8	1.2±1.2	3.2±2.2
α-Chlordane	45.3±146.9	ND	45.3±146.9	67.6±132.3	ND	73.5±153.8
γ-Chlordane	4.9±4.5	ND	4.9±4.5	3.6±3.4	ND	3.8±3.7
Chlordane	50.2±148.6	ND	50.2±148.6	71.1±132.3	ND	77.3±154.1
Endosulfan I	196.6±253.3	0.9±0.8	197.5±252.9	204.6±250.7	0.7±0.8	217.1±271.9
Endosulfan II	46.0±65.3	1.4±1.1	47.4±65.2	43.9±70.2	1.5±1.3	47.6±71.2
Endosulfan	242.6±315.5	2.3±1.6	244.9±315.0	248.5±316.3	2.2±1.9	264.7±338.2
Endrin	1.2±2.1	0.2±0.6	1.4±2.0	1.3±2.5	0.2±0.4	1.6±2.5
Mirex	1.2±1.4	ND	1.2±1.4	1.6±1.6	ND	1.7±1.7
Dieldrin	ND	1.6±2.4	1.6±2.4	ND	1.5±2.3	1.4±2.1
Total	457.1±553.4	34.3±35.0	491.4±555.7	512.4±570.6	23.4±20.8	535.9±557.9

AM: arithmetic mean, SD: standard deviation, ND: not detected.